public void TriangulateWithRiver(HexDirection dir, HexCell cell, Vector3 center, EdgeVertices edges)
{
Vector3 centerL;
Vector3 centerR;
float centerLinePinch = 2.0f / 3.0f;
if (cell.HasRiverThroughEdge(dir.Opposite()))
{
centerL = center + HexMetrics.GetFirstSolidCorner(dir.Previous()) * HexMetrics.SubdivideFraction;
centerR = center + HexMetrics.GetSecondSolidCorner(dir.Next()) * HexMetrics.SubdivideFraction;
center = (centerL + centerR) / 2.0f;
}
else if (cell.HasRiverThroughEdge(dir.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, edges.v5, centerLinePinch);
}
else if (cell.HasRiverThroughEdge(dir.Previous()))
{
centerL = Vector3.Lerp(center, edges.v1, centerLinePinch);
centerR = center;
}
else if (cell.HasRiverThroughEdge(dir.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(dir.Next()) * (0.5f * HexMetrics.InnerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(dir.Previous()) * (0.5f * HexMetrics.InnerToOuter);
centerR = center;
}
EdgeVertices modifiedEdges = new EdgeVertices(Vector3.Lerp(centerL, edges.v1, 0.5f), Vector3.Lerp(centerR, edges.v5, 0.5f));
modifiedEdges.v3.y = center.y = edges.v3.y;
TriangulateEdgeStrip(modifiedEdges, Weights1, cell.TerrainTypeIndex, edges, Weights1, cell.CellIndex);
Terrain.AddTriangle(centerL, modifiedEdges.v1, modifiedEdges.v2);
Terrain.AddQuad(centerL, center, modifiedEdges.v2, modifiedEdges.v3);
Terrain.AddQuad(center, centerR, modifiedEdges.v3, modifiedEdges.v4);
Terrain.AddTriangle(centerR, modifiedEdges.v4, modifiedEdges.v5);
Vector3 indices = new Vector3(cell.CellIndex, cell.CellIndex, cell.CellIndex);
Terrain.AddTriangleCellData(indices, Weights1);
Terrain.AddQuadCellData(indices, Weights1);
Terrain.AddQuadCellData(indices, Weights1);
Terrain.AddTriangleCellData(indices, Weights1);
if (!cell.IsUnderwater)
{
bool reverse = cell.IncomingRiverDirection == dir;
TriangulateRiverQuad(centerL, centerR, modifiedEdges.v2, modifiedEdges.v4, cell.RiverSurfaceY, 0.4f, reverse, indices);
TriangulateRiverQuad(modifiedEdges.v2, modifiedEdges.v4, edges.v2, edges.v4, cell.RiverSurfaceY, 0.6f, reverse, indices);
}
}
/// <summary>
/// 三角化有河流的六边形内部的非河流扇形
/// </summary>
/// <param name="direction"></param>
/// <param name="cell"></param>
/// <param name="center"></param>
/// <param name="e"></param>
void TriangulateAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
// 如果六边形内有道路
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
// 如果下一个相邻的扇形有河流
if (cell.HasRiverThroughEdge(direction.Next()))
{
// 如果上一个相邻的扇形有河流
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.innerToOuter * 0.5f); // 调整中心点到中心线对应方向的顶点上
}
// 如果上上一个相邻的扇形有河流
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f; // 调整中心点到中心线对应方向的顶点上
}
}
// 如果上一个相邻的扇形有河流并且下下个扇形有河流
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f; // 调整中心点到中心线对应方向的顶点上
}
EdgeVertices m = new EdgeVertices(Vector3.Lerp(center, e.v1, 0.5f), Vector3.Lerp(center, e.v5, 0.5f));
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
TriangulateEdgeFan(center, m, cell.Index);
}
void TriangulateAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.innerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(Vector3.Lerp(center, e.v1, 0.5f), Vector3.Lerp(center, e.v5, 0.5f));
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
TriangulateEdgeFan(center, m, cell.Color);
}
void TriangulateAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.innerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f)
);
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
TriangulateEdgeFan(center, m, cell.Index);
if (!cell.IsUnderWater && !cell.HasRoadThroughEdge(direction))
{
featureManager.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f));
}
}
// Rivers
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
// Left Vertex
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
// Right Vertex
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
// Middle Line
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f);
// Channel bottoms
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddTriangleColor(cell.Color);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuadColor(cell.Color);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddQuadColor(cell.Color);
terrain.AddTriangle(centerR, m.v4, m.v5);
terrain.AddTriangleColor(cell.Color);
if (!cell.IsUnderwater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed);
}
}
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f
);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
Vector3 indices;
indices.x = indices.y = indices.z = cell.Index;
terrain.AddTriangleCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddTriangleCellData(indices, weights1);
if (!cell.IsUnderWater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed, indices);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed, indices);
}
}
void TriangulateWithRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center +
HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center +
HexMetrics.GetSolidEdgeMiddle(direction.Next()) *
(0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center +
HexMetrics.GetSolidEdgeMiddle(direction.Previous()) *
(0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f
);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
AddTriangle(centerL, m.v1, m.v2);
AddTriangleColor(cell.Color);
AddQuad(centerL, center, m.v2, m.v3);
AddQuadColor(cell.Color);
AddQuad(center, centerR, m.v3, m.v4);
AddQuadColor(cell.Color);
AddTriangle(centerR, m.v4, m.v5);
AddTriangleColor(cell.Color);
}
public void solidEdgeMiddleTest()
{
Vector3 corner1 = new Vector3(0f, 0f, HexMetrics.outerRadius);
Vector3 corner2 = new Vector3(HexMetrics.innerRadius, 0f, 0.5f * HexMetrics.outerRadius);
Vector3 expected = (corner1 + corner2) * (0.5f * HexMetrics.solidFactor);
HexDirection direction = HexDirection.NE;
Vector3 actual = HexMetrics.GetSolidEdgeMiddle(direction);
Assert.AreEqual(expected, actual);
}
void TriangulateWithRiverBeginOrEnd(HexDirection direction, HexCell cell)
{
var center = cell.Center;
var closerEdge = cell.Edges[(int)direction];
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.InnerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetLeftSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetRightSolidCorner(direction) * 0.25f;
}
var m = new EdgeVertices(Vector3.Lerp(center, closerEdge.V1, 0.5f), Vector3.Lerp(center, closerEdge.V5, 0.5f));
m.V3.y = closerEdge.V3.y; // reassign middle verticle height as it is ommited in the calculation above
TriangulateEdgeStrip(m, cell.Color, closerEdge, cell.Color);
TriangulateEdgeFan(center, m, cell.Color);
// river segments are added only if the current segment is not under water
if (!cell.IsUnderwater)
{
bool reversed = cell.HasIncomingRiver;
// outer circle of the hex
TriangulateRiverQuadUnperturbed(m.V2, m.V4, closerEdge.V2, closerEdge.V4, cell.RiverSurfaceY, 0.6f, reversed);
// end (or start) triangle
center.y = m.V2.y = m.V4.y = cell.RiverSurfaceY;
Rivers.AddTriangleUnperturbed(center, m.V2, m.V4);
if (reversed)
{
Rivers.AddTriangleUV(new Vector2(0.5f, 0.4f), new Vector2(1f, 0.2f), new Vector2(0f, 0.2f));
}
else
{
Rivers.AddTriangleUV(new Vector2(0.5f, 0.4f), new Vector2(0f, 0.6f), new Vector2(1f, 0.6f));
}
}
}
void TriangulateAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) *
(HexMetrics.innerToOuter * 0.5f);
}
else if (
cell.HasRiverThroughEdge(direction.Previous2())
)
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (
cell.HasRiverThroughEdge(direction.Previous()) &&
cell.HasRiverThroughEdge(direction.Next2())
)
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f)
);
TriangulateEdgeStrip(
m, weights1, cell.Index,
e, weights1, cell.Index
);
TriangulateEdgeFan(center, m, cell.Index);
//спавн объектов игрового окружения в каждом из 6 треугольников если нет рек и дорог
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f));
}
}
private void TriangulateAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
// Check whether we are on the inside of a curve. This occurs when
// both the previous and next direction contai a river. In this case teh center
// will be moved towards the edge.
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction)
* (HexMetrics.innerToOuter * 0.5f);
// Check whether this is a straight river, in that case move the center
// towards the first corner.
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (
cell.HasRiverThroughEdge(direction.Previous()) &&
cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f));
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
TriangulateEdgeFan(center, m, cell.Color);
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
features.AddFeature((center + e.v1 + e.v5) * (1f / 3f));
}
}
public void TriangulateAdjacentToRiver(HexDirection dir, HexCell cell, Vector3 center, EdgeVertices edges)
{
if (cell.HasRoads)
{
TriangulateRoadsAdjacentToRiver(dir, cell, center, edges);
}
if (cell.HasRiverThroughEdge(dir.Next()))
{
if (cell.HasRiverThroughEdge(dir.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(dir) * (HexMetrics.InnerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(dir.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(dir) * 0.23f;
}
}
else if (cell.HasRiverThroughEdge(dir.Previous()) && cell.HasRiverThroughEdge(dir.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(dir) * 0.25f;
}
EdgeVertices modifiedEdges = new EdgeVertices(Vector3.Lerp(center, edges.v1, 0.5f), Vector3.Lerp(center, edges.v5, 0.5f));
Color color = Weights1; // cell.Color;
TriangulateEdgeStrip(modifiedEdges, color, cell.TerrainTypeIndex, edges, color, cell.CellIndex);
TriangulateEdgeFan(center, modifiedEdges, color, cell.CellIndex);
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(dir))
{
// centred in triangle
Vector3 position = (center + edges.v1 + edges.v5) * (1f / 3f);
FeatureManager.AddFeature(cell, position);
}
}
/// <summary>
/// Creates the triangles for a side of the hexagon, when there is a river in the hex.
/// </summary>
void TriangulateAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
// Determine center by finding river channel center edge
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.InnerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f)
);
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
TriangulateEdgeFan(center, m, cell.Index);
// If possible add any features
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
Features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f));
}
}
/// <summary>
/// Fill the cell triangle with a strip and a fan. We cannot suffice with a single fan,
/// because we have to make sure that we match the middle edge of the parts that do contain a river.
/// </summary>
void TriangulateAdjacentToRiver(HexDirection direction, HexCell cell, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, e);
}
var center = cell.Center;
if (cell.HasRiverThroughEdge(direction.Next()))
{
// we are inside a curve
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.InnerToOuter * 0.5f);
}
// we are inside a straight line
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetLeftSolidCorner(direction) * 0.25f;
}
}
// The final case is when we have a river in the previous direction, and it is a straight one.
// That requires moving the center towards the next solid corner.
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetRightSolidCorner(direction) * 0.25f;
}
var m = new EdgeVertices(Vector3.Lerp(center, e.V1, 0.5f), Vector3.Lerp(center, e.V5, 0.5f));
m.V3.y = e.V3.y;
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
TriangulateEdgeFan(center, m, cell.Color);
}
public void Execute(Entity entity, int index, [ReadOnly] ref Cell cellData, [ReadOnly] ref NewDataTag tag, [ReadOnly] ref Neighbors neighbors, [ReadOnly] ref NeighborsIndex neighborsIndex, [ReadOnly] ref River river)
{
//0.获取单元索引，Execute的index不可靠，添加动态缓存
int cellIndex = cellData.Index;
DynamicBuffer <ColorBuffer> colorBuffer = CommandBuffer.AddBuffer <ColorBuffer>(index, entity);
DynamicBuffer <VertexBuffer> vertexBuffer = CommandBuffer.AddBuffer <VertexBuffer>(index, entity);
//用于河流的动态缓存
DynamicBuffer <UvBuffer> uvBuffer = CommandBuffer.AddBuffer <UvBuffer>(index, entity);
DynamicBuffer <RiverBuffer> riverBuffers = CommandBuffer.AddBuffer <RiverBuffer>(index, entity);
//1.获取当前单元的中心位置
Vector3 currCellCenter = cellData.Position;
//缓存当前单元的颜色
Color currCellColor = cellData.Color;
//当前单元的海拔
int elevation = cellData.Elevation;
////保存需要混合的颜色，使用数组[]是为了方便循环
Color[] blendColors = new Color[6];
blendColors[0] = neighbors.NE;
blendColors[1] = neighbors.E;
blendColors[2] = neighbors.SE;
blendColors[3] = neighbors.SW;
blendColors[4] = neighbors.W;
blendColors[5] = neighbors.NW;
//前3个方向相邻单元的索引
int[] directionIndex = new int[6];
directionIndex[0] = neighborsIndex.NEIndex;
directionIndex[1] = neighborsIndex.EIndex;
directionIndex[2] = neighborsIndex.SEIndex;
directionIndex[3] = neighborsIndex.SWIndex;
directionIndex[4] = neighborsIndex.WIndex;
directionIndex[5] = neighborsIndex.NWIndex;
//前三个方向相邻单元的海拔
int[] elevations = new int[6];
elevations[0] = neighbors.NEElevation;
elevations[1] = neighbors.EElevation;
elevations[2] = neighbors.SEElevation;
elevations[3] = neighbors.SWElevation;
elevations[4] = neighbors.WElevation;
elevations[5] = neighbors.NWElevation;
//添加六边形单元六个方向的顶点、三角和颜色
for (int j = 0; j < 6; j++)
{
//1.添加中心区域的3个顶点
int next = (j + 1) > 5 ? 0 : (j + 1);
EdgeVertices e = new EdgeVertices((currCellCenter + HexMetrics.SolidCorners[j]), (currCellCenter + HexMetrics.SolidCorners[next]));
int prev = (j - 1) < 0 ? 5 : (j - 1);
int next2 = (j + 2) <= 5 ? (j + 2) : (j - 4);
int prev2 = (j - 2) >= 0 ? (j - 2) : (j + 4);
//是否有河流通过
bool hasRiverThroughEdge = HasRiverThroughEdge(river, directionIndex[j]);
float RiverSurfaceY = (elevation + HexMetrics.riverSurfaceElevationOffset) * HexMetrics.elevationStep;
//如果有河流通过，则降低海拔来创造河道
if (cellData.HasRiver)
{
if (hasRiverThroughEdge)
{
e.v3.y = (elevation + HexMetrics.streamBedElevationOffset) * HexMetrics.elevationStep;
if (river.HasOutgoingRiver != river.HasIncomingRiver)
{
//TriangulateWithRiverBeginOrEnd(directions[j], directions[prev], directions[next], currCellColor, currCellCenter, e, ref colorBuffer, ref vertexBuffer);
EdgeVertices m = new EdgeVertices(Vector3.Lerp(currCellCenter, e.v1, 0.5f), Vector3.Lerp(currCellCenter, e.v5, 0.5f));
m.v3.y = e.v3.y;
TriangulateEdgeStrip(m, currCellColor, e, currCellColor, ref colorBuffer, ref vertexBuffer);
TriangulateEdgeFan(currCellCenter, m, currCellColor, ref colorBuffer, ref vertexBuffer);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, RiverSurfaceY, RiverSurfaceY, 0.6f, ref uvBuffer, ref riverBuffers, river.HasIncomingRiver);
Vector3 center = currCellCenter;
center.y = m.v2.y = m.v4.y = RiverSurfaceY;
AddTriangle(center, m.v2, m.v4, ref riverBuffers);
if (river.HasIncomingRiver)
{
AddTriangleUV(new Vector2(0.5f, 0.4f), new Vector2(1f, 0.2f), new Vector2(0f, 0.2f), ref uvBuffer);
}
else
{
AddTriangleUV(new Vector2(0.5f, 0.4f), new Vector2(0f, 0.6f), new Vector2(1f, 0.6f), ref uvBuffer);
}
}
else
{
//TriangulateWithRiver(direction, directions[prev], directions[next], currCellColor, currCellCenter, e, ref colorBuffer, ref vertexBuffer, oppositeHasRiverThroughEdge);
Vector3 centerL, centerR;
//获取当前方向的相反方向，并判断是否有河流经过
if (HasRiverThroughEdge(river, directionIndex[OppositeDirection(j)]))
{
centerL = currCellCenter + HexMetrics.GetFirstSolidCorner(prev) * 0.25f;
centerR = currCellCenter + HexMetrics.GetSecondSolidCorner(next) * 0.25f;
}
else if (HasRiverThroughEdge(river, directionIndex[next]))
{
centerL = currCellCenter;
centerR = Vector3.Lerp(currCellCenter, e.v5, 2f / 3f);
}
else if (HasRiverThroughEdge(river, directionIndex[prev]))
{
centerL = Vector3.Lerp(currCellCenter, e.v1, 2f / 3f);
centerR = currCellCenter;
}
else if (HasRiverThroughEdge(river, directionIndex[next2]))
{
centerL = currCellCenter;
centerR = currCellCenter + HexMetrics.GetSolidEdgeMiddle(next) * (0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = currCellCenter + HexMetrics.GetSolidEdgeMiddle(prev) * (0.5f * HexMetrics.innerToOuter);
centerR = currCellCenter;
}
Vector3 center = Vector3.Lerp(centerL, centerR, 0.5f);
EdgeVertices m = new EdgeVertices(Vector3.Lerp(centerL, e.v1, 0.5f), Vector3.Lerp(centerR, e.v5, 0.5f), 1f / 6f);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, currCellColor, e, currCellColor, ref colorBuffer, ref vertexBuffer);
AddTriangle(centerL, currCellColor, m.v1, currCellColor, m.v2, currCellColor, ref colorBuffer, ref vertexBuffer);
AddQuad(centerL, currCellColor, center, currCellColor, m.v2, currCellColor, m.v3, currCellColor, ref colorBuffer, ref vertexBuffer);
AddQuad(center, currCellColor, centerR, currCellColor, m.v3, currCellColor, m.v4, currCellColor, ref colorBuffer, ref vertexBuffer);
AddTriangle(centerR, currCellColor, m.v4, currCellColor, m.v5, currCellColor, ref colorBuffer, ref vertexBuffer);
bool reversed = river.IncomingRiver == directionIndex[j];
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, RiverSurfaceY, RiverSurfaceY, 0.4f, ref uvBuffer, ref riverBuffers, reversed);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, RiverSurfaceY, RiverSurfaceY, 0.6f, ref uvBuffer, ref riverBuffers, reversed);
}
}
else
{
Vector3 center = currCellCenter;
if (HasRiverThroughEdge(river, directionIndex[next]))
{
if (HasRiverThroughEdge(river, directionIndex[prev]))
{
center += HexMetrics.GetSolidEdgeMiddle(j) * (HexMetrics.innerToOuter * 0.5f);
}
else if (HasRiverThroughEdge(river, directionIndex[prev2]))
{
center += HexMetrics.GetFirstSolidCorner(j) * 0.25f;
}
}
else if (HasRiverThroughEdge(river, directionIndex[prev]) && HasRiverThroughEdge(river, directionIndex[next2]))
{
center += HexMetrics.GetSecondSolidCorner(j) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f)
);
TriangulateEdgeStrip(m, currCellColor, e, currCellColor, ref colorBuffer, ref vertexBuffer);
TriangulateEdgeFan(center, m, currCellColor, ref colorBuffer, ref vertexBuffer);
}
}
else
{
TriangulateEdgeFan(currCellCenter, e, currCellColor, ref colorBuffer, ref vertexBuffer);
}
//Connection Between 2 cells
#region Bridge=桥
//桥只连接前三个方向相邻的单元，从而避免重复连接
if (j <= 2)
{
if (directionIndex[j] == int.MinValue)
{//如果没有相邻的单元，则跳过循环
continue;
}
//添加外围桥接区域的顶点
Vector3 bridge = (HexMetrics.GetBridge(j));
bridge.y = (elevations[j] - elevation) * HexMetrics.elevationStep;
EdgeVertices e2 = new EdgeVertices(e.v1 + bridge, e.v5 + bridge);
if (hasRiverThroughEdge)
{
float neighborRiverSurfaceY = (elevations[j] + HexMetrics.riverSurfaceElevationOffset) * HexMetrics.elevationStep;
e2.v3.y = (elevations[j] + HexMetrics.streamBedElevationOffset) * HexMetrics.elevationStep;
TriangulateRiverQuad(e.v2, e.v4, e2.v2, e2.v4, RiverSurfaceY, neighborRiverSurfaceY, 0.8f, ref uvBuffer, ref riverBuffers, river.HasIncomingRiver && river.IncomingRiver == directionIndex[j]);
}
#region 桥面
//判断当前单元与相邻单元的海拔高低差，如果是斜坡，则添加阶梯，平面和峭壁则无需阶梯
if (HexMetrics.GetEdgeType(elevation, elevations[j]) == HexMetrics.HexEdgeType.Slope)
{
TriangulateEdgeTerraces(e, e2, currCellColor, blendColors[j], ref colorBuffer, ref vertexBuffer);
}
else
{
Color bridgeColor = (currCellColor + blendColors[j]) * 0.5f;
TriangulateEdgeStrip(e, currCellColor, e2, blendColors[j], ref colorBuffer, ref vertexBuffer);
}
#endregion
#region 桥洞
//添加外圈区域三向颜色混合
if (j <= 1 && directionIndex[next] != int.MinValue)
{
//下一个相邻单元的海拔
int nextElevation = elevations[next];
Vector3 vertex5 = e.v5 + HexMetrics.GetBridge(next);
vertex5.y = nextElevation * HexMetrics.elevationStep;
//判断相邻的三个六边形单元的高低关系，按照最低（Bottom），左（Left），右（Right）的顺序进行三角化处理
if (elevation <= elevations[j])
{
if (elevation <= nextElevation)
{
//当前单元海拔最低
TriangulateCorner(e.v5, currCellColor, e2.v5, blendColors[j], vertex5, blendColors[next], ref colorBuffer, ref vertexBuffer, elevation, elevations[j], nextElevation);
}
else
{
TriangulateCorner(vertex5, blendColors[next], e.v5, currCellColor, e2.v5, blendColors[j], ref colorBuffer, ref vertexBuffer, nextElevation, elevation, elevations[j]);
}
}
else if (elevations[j] <= nextElevation)
{
TriangulateCorner(e2.v5, blendColors[j], vertex5, blendColors[next], e.v5, currCellColor, ref colorBuffer, ref vertexBuffer, elevations[j], nextElevation, elevation);
}
else
{
TriangulateCorner(vertex5, blendColors[next], e.v5, currCellColor, e2.v5, blendColors[j], ref colorBuffer, ref vertexBuffer, nextElevation, elevation, elevations[j]);
}
}
#endregion
}
#endregion
}
//4.turn off cell system by remove NewDataTag
CommandBuffer.RemoveComponent <NewDataTag>(index, entity);
}
void TriangulateWithRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center +
HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center +
HexMetrics.GetSolidEdgeMiddle(direction.Next()) *
(0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center +
HexMetrics.GetSolidEdgeMiddle(direction.Previous()) *
(0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f
);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, color1, (int)cell.TerrainType, e, color1, (int)cell.TerrainType);
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
terrain.AddTriangleColor(color1);
terrain.AddQuadColor(color1);
terrain.AddQuadColor(color1);
terrain.AddTriangleColor(color1);
Vector3 types;
types.x = types.y = types.z = (float)cell.TerrainType;
terrain.AddTriangleTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddTriangleTerrainTypes(types);
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(
centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed
);
TriangulateRiverQuad(
m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed
);
}
private void TriangulateRoadAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center;
// Push the road center in the opposite direction of the river. This is
// so that the road does not overlap with the river's begin or end.
if (cell.HasRiverBeginOrEnd)
{
// Displace the center 1/3 of the distance to the edge middle point of the opposite direction.
roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f);
// River crosses through the cell.
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner;
if (previousHasRiver)
{
if (
!hasRoadThroughEdge &&
!cell.HasRoadThroughEdge(direction.Next())
)
{
return;
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
if (!hasRoadThroughEdge &&
!cell.HasRoadThroughEdge(direction.Previous()))
{
return;
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
center += corner * 0.25f;
// Zig Zag cases
// Move the road center by using one of the corners of the incoming river direction.
// Push the road center away from that corner.
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous())
{
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next())
{
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
// Inside of Curved Rivers
// River on both sides of the current direction, that means there is a curved river. In
// this case pull the Road towards the current cell edge, shortening the road.
}
else if (previousHasRiver && nextHasRiver)
{
// Prune isolated road parts, that is, do not render a road through that edge.
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.innerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
// Outside of a curving river
// There are three cell parts on the outside, we have to
// find the middle direction.
}
else
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
// Prune this side of the river if there is no road that continues through
// this direction, the previous or the next one.
if (!cell.HasRoadThroughEdge(middle) &&
!cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next()))
{
return;
}
roadCenter += HexMetrics.GetSolidEdgeMiddle(middle) * 0.25f;
}
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge);
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center);
}
}
void TriangulateRoadAdjacentToRiver(HexDirection direction, HexCell cell, EdgeVertices e)
{
var center = cell.Center;
// produce partial roads in cells with rivers. The directions with rivers through them will cut gaps in the roads.
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector3 roadCenter = center;
if (cell.HasRiverBeginOrEnd)
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f);
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner;
if (previousHasRiver)
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next()))
{
return;
}
corner = HexMetrics.GetRightSolidCorner(direction);
}
else
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous()))
{
return;
}
corner = HexMetrics.GetLeftSolidCorner(direction);
}
roadCenter += corner * 0.5f;
// add bridges
if (cell.IncomingRiver == direction.Next() &&
(cell.HasRoadThroughEdge(direction.Next2()) || cell.HasRoadThroughEdge(direction.Opposite())))
{
Features.AddBridge(roadCenter, center - corner * 0.5f);
}
center += corner * 0.25f;
}
// in case of zigzags
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous())
{
roadCenter -= HexMetrics.GetRightCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next())
{
roadCenter -= HexMetrics.GetLeftCorner(cell.IncomingRiver) * 0.2f;
}
// in case of curved rivers
else if (previousHasRiver && nextHasRiver)
{
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.InnerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
// outside of the curved river
else
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
// get rid off roads on the other side of the river
if (!cell.HasRoadThroughEdge(middle) &&
!cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next()))
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle);
roadCenter += offset * 0.25f;
// prevent duplications
if (direction == middle && cell.HasRoadThroughEdge(direction.Opposite()))
{
Features.AddBridge(roadCenter, center - offset * (HexMetrics.InnerToOuter * 0.7f));
}
}
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 mL = Vector3.Lerp(roadCenter, e.V1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.V5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge);
// close the gaps
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center);
}
}
void TriangulateWithRiver(HexDirection direction, HexCell cell)
{
var center = cell.Center;
var closerEdge = cell.Edges[(int)direction];
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.InnerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetLeftSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetRightSolidCorner(direction) * 0.25f;
}
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center + HexMetrics.GetLeftSolidCorner(direction.Previous()) * 0.25f;
centerR = center + HexMetrics.GetRightSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, closerEdge.V5, 0.65f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, closerEdge.V1, 0.65f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.InnerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.InnerToOuter);
centerR = center;
}
// after deciding where the left and right points are, we can determine the final center by averaging them
center = Vector3.Lerp(centerL, centerR, 0.5f);
var m = new EdgeVertices(Vector3.Lerp(centerL, closerEdge.V1, 0.5f), Vector3.Lerp(centerR, closerEdge.V5, 0.5f), 1f / 12f);
m.V3.y = closerEdge.V3.y;
// external hex circle
TriangulateEdgeStrip(m, cell.Color, closerEdge, cell.Color);
// connection between hexes
Terrain.AddTriangle(centerL, m.V1, m.V2);
Terrain.AddTriangleColor(cell.Color);
Terrain.AddQuad(centerL, new Vector3(center.x, cell.StreamBedY, center.z), m.V2, m.V3);
Terrain.AddQuadColor(cell.Color);
Terrain.AddQuad(new Vector3(center.x, cell.StreamBedY, center.z), centerR, m.V3, m.V4);
Terrain.AddQuadColor(cell.Color);
Terrain.AddTriangle(centerR, m.V4, m.V5);
Terrain.AddTriangleColor(cell.Color);
// create river quads
if (!cell.IsUnderwater)
{
bool reversed = cell.IncomingRiver == direction;
// inner fan of the hex
TriangulateRiverQuadUnperturbed(centerL, centerR, m.V2, m.V4, cell.RiverSurfaceY, 0.4f, reversed);
// external circle of the hex
var neighbor = cell.GetNeighbor(direction);
if (neighbor.IsUnderwater)
{
TriangulateRiverQuadUnperturbed(m.V2, m.V4, closerEdge.V2, closerEdge.V4,
cell.RiverSurfaceY, HexMetrics.WaterSurfaceY, 0.6f, reversed);
}
// normal connection between two rivers
else
{
TriangulateRiverQuadUnperturbed(m.V2, m.V4, closerEdge.V2, closerEdge.V4, cell.RiverSurfaceY, 0.6f, reversed);
}
}
}
void TriangulateRoadAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center;
// Push road center away from river
if (cell.HasRiverBeginOrEnd)
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f);
}
// Disconnect road on opposite side of river
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner;
if (previousHasRiver)
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next()))
{
return;
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous()))
{
return;
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
center += corner * 0.25f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous())
{
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next())
{
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
}
else if (previousHasRiver && nextHasRiver)
{
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.innerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
else
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
if (!cell.HasRoadThroughEdge(middle) &&
!cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next()))
{
return;
}
roadCenter += HexMetrics.GetSolidEdgeMiddle(middle) * 0.25f;
}
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge);
// Close gaps in road created by river
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center);
}
}
/// <summary>
/// 生成有河流的三角网格
/// </summary>
/// <param name="direction">处理的对应方向</param>
/// <param name="cell">六边形对象引用</param>
/// <param name="center">中心点坐标</param>
/// <param name="e">边界中值插值对象</param>
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
// 河道拓宽为直线的左边界点，后续逻辑以此类推
// 总之向转弯内侧进行网格拼接
centerL = center +
HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center +
HexMetrics.GetSolidEdgeMiddle(direction.Next()) *
(0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center +
HexMetrics.GetSolidEdgeMiddle(direction.Previous()) *
(0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f
);
// 同步河道底部高度
m.v3.y = center.y = e.v3.y;
// 填充插值中间点与边界间的平面
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
// 根据计算进行网格拼接
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddTriangleColor(cell.Color);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuadColor(cell.Color);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddQuadColor(cell.Color);
terrain.AddTriangle(centerR, m.v4, m.v5);
terrain.AddTriangleColor(cell.Color);
// 排除河流在水面下显示
if (!cell.IsUnderwater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(
centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed
);
TriangulateRiverQuad(
m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed
);
}
}
/// <summary>
/// 道路临近河流时的网格处理
/// </summary>
/// <param name="direction"></param>
/// <param name="cell"></param>
/// <param name="center"></param>
/// <param name="e"></param>
void TriangulateRoadAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center;
// 使道路的中心向河流的反方向移动
if (cell.HasRiverBeginOrEnd)
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(
cell.RiverBeginOrEndDirection.Opposite()
) * (1f / 3f);
}
// 处理直线河流对于道路的分割
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner;
if (previousHasRiver)
{
// 对于只有一侧有路穿越六边形一边的，将分割后的道路另一侧三角孤岛取消
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next()))
{
return;
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous()))
{
return;
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
center += corner * 0.25f;
}
// 对于Z字形河流的道路填充判断
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous())
{
// 使道路中心远离河流流入方向向量的0.2
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next())
{
// 使道路中心远离河流流入方向向量的0.2
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
}
// 处理转弯平滑的河流的道路网格，此时是位于转弯弧内侧
else if (previousHasRiver && nextHasRiver)
{
// 没有道路穿过时，直接跳出方法不进行渲染
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.innerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
// 处理转弯平滑的河流的道路网格，此时是位于转弯弧外侧
else
{
// 确定转弯弧外侧的中间方向
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
// 如果剩余三个方向都没有道路，则跳出当前方法不生成道路
if (!cell.HasRoadThroughEdge(middle) &&
!cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next()))
{
return;
}
// 将道路弧向中间方向的边界移动25%
roadCenter += HexMetrics.GetSolidEdgeMiddle(middle) * 0.25f;
}
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge);
// 平滑处理道路与河流相遇的网格，闭合网格空隙
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center);
}
}
/// <summary>
/// 三角化有河流流过（有流出也有流入）的六边形内部的有河流的扇形
/// </summary>
/// <param name="direction"></param>
/// <param name="cell"></param>
/// <param name="center"></param>
/// <param name="e"></param>
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL; //六边形中心线的左边顶点
Vector3 centerR; //六边形中心线的左边顶点
// 如果流入和流出方向刚好相反（河道是一条直线）
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
// 把六边形中心点扩展成一条垂直于河道的线（中心线）
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f; // 计算出中心线的左边顶点
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f; // 计算出中心线的右边顶点
}
// 如果流入方向和流出方向相邻
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2 / 3f); // 把中心线右顶点往外部移动，让中心河道宽一点
}
// 如果流入方向和流出方向相邻
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2 / 3f); // 把中心线左顶点往外部移动，让中心河道宽一点
centerR = center;
}
// 如果流入方向和流出方向相隔一个扇形
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.innerToOuter); // 调整中心线右顶点，使河道变宽
}
// 如果流入方向和流出方向相隔一个扇形
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.innerToOuter);// 调整中心线右顶点，使河道变宽
centerR = centerR = center;
}
// 计算出中心线与外部边缘的中线
// 梯形：
// 外部边缘： ————
// 中线： -——-
// 六边形中心线： ——
EdgeVertices m = new EdgeVertices(Vector3.Lerp(centerL, e.v1, 0.5f), Vector3.Lerp(centerR, e.v5, 0.5f), 1 / 6f);
center = Vector3.Lerp(centerL, centerR, 0.5f); // 中心点重新设置为中心线两顶点的中点
m.v3.y = center.y = e.v3.y; // 调整中线的中心顶点的高度为河床高度
// 三角化中线到外部边缘之间的长方形
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
// 三角化六边形中心线到梯形中线的梯形（两个三角形，两个长方形）
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
// 顶点附近三个六边形格子的索引和splat贴图颜色
Vector3 indices;
indices.x = indices.y = indices.z = cell.Index;
terrain.AddTriangleCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddTriangleCellData(indices, weights1);
// 三角化河水
if (!cell.IsUnderwater) // 检查是否在陆地，如果在陆地则三角化河水
{
bool reversed = cell.IncomingRiver == direction; // 流入河水需要翻转UV
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed, indices);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed, indices);
}
}
/// <summary>
/// 三角化有河流的六边形内的道路
/// </summary>
/// <param name="direction"></param>
/// <param name="cell"></param>
/// <param name="center">六边形的中心</param>
/// <param name="e"></param>
void TriangulateRoadAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction); // 扇形是否有道路
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous()); // 上一个方向是否有河流
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next()); // 下一个方向是否有河流
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center; // 把道路中心初始化成六边形中心
// 如果六边形是河流的源头或者尽头
if (cell.HasRiverBeginOrEnd)
{
// 道路中点往河流的反方向推三分之一
roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f);
}
// 如果六边形里河流流入方向和流出方向成一直线
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner; // 位于河流垂线上的点
if (previousHasRiver)
{
// 如果扇形内没有河流且下一个方向的扇形也没有河流，则返回不进行道路三角化
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next()))
{
return;
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
// 如果扇形内没有河流且上一个方向的扇形也没有河流，则返回不进行道路三角化
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous()))
{
return;
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
// 需要把道路中心两个点沿着河流的垂线往外推
roadCenter += corner * 0.5f;
// 添加桥梁
if (cell.IncomingRiver == direction.Next() && // 由于有多个没有河流经过的扇形，所以只选取一个方向的扇形添加桥梁，保证只实例化一次桥梁
(cell.HasRoadThroughEdge(direction.Next2()) || cell.HasRoadThroughEdge(direction.Opposite()))) // 河流对面的扇形也有道路才添加桥梁
{
features.AddBridge(roadCenter, center - corner * 0.5f); // 沿着河流垂线找到桥的第二个端点
}
// 六边形中心也往外推
center += corner * 0.25f;
}
// 如果流入河流与流出河流相邻
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous())
{
// 道路中心往流入流出河流的相交尖端方向推
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
// 如果流入河流与流出河流相邻
else if (cell.IncomingRiver == cell.OutgoingRiver.Next())
{
// 道路中心往流入流出河流的相交尖端方向推
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
}
// 如果扇形上一个方向有河流，下一个方向也有河流（流出流入河流相隔一个扇形，当前扇形位于河流弧度的内侧）
else if (previousHasRiver && nextHasRiver)
{
// 如果扇形里没有道路，则返回不进行道路三角化
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.innerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f; // 该参数与三角化河流那里一样用0.5，可以刚好移到河流边缘（TriangulateAdjacentToRiver方法内）
}
// 流出流入河流相隔一个扇形,且当前扇形位于河流弧度的外侧
else
{
HexDirection middle; // 中间扇形的方向
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
// 如果河流弧度外侧三个扇形都没有河流，则不需要对道路进行三角化
if (!cell.HasRoadThroughEdge(middle) &&
!cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next()))
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle);
roadCenter += offset * 0.25f;
if (direction == middle && // 避免重复生成桥梁，只在创建河流弧度外侧的中间扇形道路的时候添加桥梁
cell.HasRoadThroughEdge(direction.Opposite())) // 河对岸也要有道路
{
features.AddBridge(roadCenter, center - offset * (HexMetrics.innerToOuter * 0.7f)); // 这里的第二个参数为道路在河流弧度内侧时的道路中心
}
}
// 三角化道路
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge, cell.Index);
// 如果上一个方向有河流，则三角化一个道路边缘填补空隙
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL, cell.Index);
}
// 如果下一个方向有河流，则三角化一个道路边缘填补空隙
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center, cell.Index);
}
}
/// <summary>
/// Creates the triangles for a side of the hexagon, with river passing through (incoming and outgoing river) at this side.
/// </summary>
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite())) // If river flows forward through the cell
// Extend center into line
{
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next())) // If river bends sharply in next dir
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous())) // If river bends sharply in prev dir
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2())) // River bends smoothly to next.next dir
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.InnerToOuter);
}
else // River bends smoothly to previous.previous dir
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.InnerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f); // Average center to serve all cases
// Edge 1/2 the way from edge and cell center
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f
);
m.v3.y = center.y = e.v3.y; // Lower middle edge and center to river bed
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
// Final gap between the middle edge and the center
// Geo
Terrain.AddTriangle(centerL, m.v1, m.v2);
Terrain.AddQuad(centerL, center, m.v2, m.v3);
Terrain.AddQuad(center, centerR, m.v3, m.v4);
Terrain.AddTriangle(centerR, m.v4, m.v5);
// Splat + Terrain Types
Vector3 indices;
indices.x = indices.y = indices.z = cell.Index;
Terrain.AddTriangleCellData(indices, weights1);
Terrain.AddQuadCellData(indices, weights1);
Terrain.AddQuadCellData(indices, weights1);
Terrain.AddTriangleCellData(indices, weights1);
if (!cell.IsUnderwater) // No river water surface when underwater, river bed allowed
// River water surface
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed, indices);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed, indices);
}
}
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
//если река идет зигзагом, то смещаем центры клеток(только вершины для отрисовки)
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))//прямая река
{
centerL = center +
HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))//проверка на резкий поворот
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))//проверка на резкий поворот
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center +
HexMetrics.GetSolidEdgeMiddle(direction.Next()) *
(0.5f * HexMetrics.innerToOuter);//для правильного изгиба
}
else
{
centerL = center +
HexMetrics.GetSolidEdgeMiddle(direction.Previous()) *
(0.5f * HexMetrics.innerToOuter);//для правильного изгиба
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);//сдвиг центра для более благоприятного внешнего вида
//искусственно переделываем тайл
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f
);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(
m, weights1, cell.Index,
e, weights1, cell.Index
);
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
Vector3 indices;
indices.x = indices.y = indices.z = cell.Index;
terrain.AddTriangleCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddTriangleCellData(indices, weights1);
if (!cell.IsUnderwater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(
centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed, indices
);
TriangulateRiverQuad(
m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed, indices
);
}
}
/// <summary>
/// Creates road geometry when there is a river in the cell.
/// </summary>
void TriangulateRoadAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center;
// When there is a river start/end or a river zig-zag then we only need to offset road center
// If there is a straight section of river cutting through or a smooth turn then those divide the road network
if (cell.HasRiverBeginOrEnd) // If this is river start or river end
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f);
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite()) // If this is a river section cutting cell in the middle
{
Vector3 corner;
if (previousHasRiver)
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next()))
{
return; // Dont draw on the other side of the river
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous()))
{
return; // Dont draw on the other side of the river
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
// Prevent duplicate bridges and add a bridge if road on both sides
if (cell.IncomingRiver == direction.Next() && (
cell.HasRoadThroughEdge(direction.Next2()) ||
cell.HasRoadThroughEdge(direction.Opposite())
))
{
Features.AddBridge(roadCenter, center - corner * 0.5f);
}
center += corner * 0.25f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous()) // Check if zig-zag and offset
{
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next()) // Check if zig-zag and offset
{
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
}
else if (previousHasRiver && nextHasRiver) // Check smooth curve (inside of the curve)
{
if (!hasRoadThroughEdge)
{
return; // Dont draw on the other side of the river
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.InnerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
else // Smooth curve (outside of the curve)
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
if (!cell.HasRoadThroughEdge(middle) && !cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next()))
{
return; // Dont draw on the other side of the river
}
// Set center and add bridge
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle);
roadCenter += offset * 0.25f;
// Prevent duplicate bridges and road on both sides
if (direction == middle && cell.HasRoadThroughEdge(direction.Opposite()))
{
Features.AddBridge(roadCenter, center - offset * (HexMetrics.InnerToOuter * 0.7f));
}
}
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge, cell.Index);
// Create auxiliary geometry
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL, cell.Index);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center, cell.Index);
}
}
//绘制河道贯穿的整个cell的情况
void TriangulateWithRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
//河流中心的左右岸，*0.25是因为边界是4个矩形，河流占0.5
centerL = center +
HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
//当cell河流存在转角的时候
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerR = center;
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center +
HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center +
HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
EdgeVertices m = new EdgeVertices(Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f), 1f / 6f);
m.v3.y = center.y = e.v3.y;
//绘制上半个梯形
TriangulateEdgeStrip(m, color1, cell.TerrainTypeIndex,
e, color1, cell.TerrainTypeIndex);
//添加三角形面片
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
//顺序添加顶点颜色
terrain.AddTriangleColor(color1);
terrain.AddQuadColor(color1);
terrain.AddQuadColor(color1);
terrain.AddTriangleColor(color1);
//地形贴图索引
Vector3 types;
types.x = types.y = types.z = cell.TerrainTypeIndex;
terrain.AddTriangleTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddTriangleTerrainTypes(types);
if (!cell.IsUnderwater)
{
//添加水面
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed);
}
}
void TriangulateRoadAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center;
if (cell.HasRiverBeginOrEnd)
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(
cell.RiverBeginOrEndDirection.Opposite()
) * (1f / 3f);
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner;
if (previousHasRiver)
{
if (
!hasRoadThroughEdge &&
!cell.HasRoadThroughEdge(direction.Next())
)
{
return;
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
if (
!hasRoadThroughEdge &&
!cell.HasRoadThroughEdge(direction.Previous())
)
{
return;
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
if (cell.IncomingRiver == direction.Next() && (
cell.HasRoadThroughEdge(direction.Next2()) ||
cell.HasRoadThroughEdge(direction.Opposite())
))
{
features.AddBridge(roadCenter, center - corner * 0.5f);
}
center += corner * 0.25f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous())
{
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next())
{
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
}
else if (previousHasRiver && nextHasRiver)
{
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) *
HexMetrics.innerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
else
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
if (
!cell.HasRoadThroughEdge(middle) &&
!cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next())
)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle);
roadCenter += offset * 0.25f;
if (
direction == middle &&
cell.HasRoadThroughEdge(direction.Opposite())
)
{
features.AddBridge(
roadCenter,
center - offset * (HexMetrics.innerToOuter * 0.7f)
);
}
}
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge, cell.Index);
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL, cell.Index);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center, cell.Index);
}
}
private void TriangulateWithRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
// Two cases:
// If the cell has a river going through the opposite direction as well as the direction
// that we are working with, the cell holds a straight river.
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
// Stretch the center into a line. Move 25% from the center to the first corner of the previous
// direction, and 25% from the center to the second corner of the second direction.
// One simple way of visualizing this is having a top-down view of the HexMesh and imagining
// a triangulation in the eastern direction.
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
// Otherwise, the river does not flow in a straight line, check special cases:
// Detect sharp turns by checking whether the cell has a rive going through the next
// or previous cell part.
// When there is a sharp turn, align the center line with the edge between this and the adjacent part.
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f /* Increased center line width from 1/2 to 2/3 */);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f /* Increased center line width from 1/2 to 2/3 */);
centerR = center;
// 2 step rotations, these produce gently curving rivers.
// A river is going through two directions after this one.
// Expand the center towards the center of the next direction's edge.
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
// Note that the edge middle point is closer that the vertex itself (it's within the inner radius)
// which is why extending the center towards that edge will end up with a pinched section.
// We extend the center edge towards the middle edge times innerToOuter radius to keep
// the channel width constant.
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next())
* (0.5f * HexMetrics.innerToOuter);
// 2 step rotation, a river is going through two directions before this one.
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous())
* (0.5f * HexMetrics.innerToOuter);
centerR = center;
}
// Determine the final center by averaging the Left and Right centers
center = Vector3.Lerp(centerL, centerR, 0.5f);
// We lerp the second and fourth vertices using 1/6 instead of the usual 1/4 as the
// length from the edges is 1/8 instead of 1/4. This is because the channel has a
// the same width along the river, so the relative edge length of the outer edges
// will be 1/6 relative to the edge's middle length. (1/8 of 3/4)
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
// Add the triangles and quads that reached the center.
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddTriangleColor(cell.Color);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuadColor(cell.Color);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddQuadColor(cell.Color);
terrain.AddTriangle(centerR, m.v4, m.v5);
terrain.AddTriangleColor(cell.Color);
if (!cell.IsUnderwater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed);
}
}
