/*
* e.v1 _________________ e.v5
* \ | | | /
* m.v1\__|___|___|__/m.v5
* \ | | | /
* \|___|___|/
* cL c cR
* e.v1 ~ e.v5 平均分成4分 每份是1/4
* m/e = 3/4,所以 m.v1 ~ m.v5 是1/6，1/4，1/4，1/6
*/
/// <summary>
/// 河道三角化
/// </summary>
/// <param name="cell"></param>
/// <param name="direction"></param>
/// <param name="center"></param>
/// <param name="edge"></param>
private void TriangulateWithRiver(HexCell cell, HexDirectionEnum direction, Vector3 center, EdgeVertices edge)
{
Vector3 centerL;
Vector3 centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 1 / 4f;
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 1 / 4f;
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, edge.v1, 2 / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, edge.v5, 2 / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Next(2)))
{
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, edge.v1, 0.5f),
Vector3.Lerp(centerR, edge.v5, 0.5f), 1 / 6f);
m.v3.y = center.y = edge.v3.y;
TriangulateEdgeStrip(m, weights1, cell.Index, edge, weights1, cell.Index);
AddTerrainPerturTriangle(centerL, m.v1, m.v2);
AddTerrainQuad(centerL, center, m.v2, m.v3);
AddTerrainQuad(center, centerR, m.v3, m.v4);
AddTerrainPerturTriangle(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);
bool reversed = cell.InComingRive == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceHight, 0.4f, reversed, indices);
TriangulateRiverQuad(m.v2, m.v4, edge.v2, edge.v4, cell.RiverSurfaceHight, 0.6f, reversed, indices);
}
private void TriangulateAdjacentToRiver(HexCell cell, HexDirectionEnum direction, Vector3 center, EdgeVertices edge)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, 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.Previous(2)))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next(2)))
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(Vector3.Lerp(center, edge.v1, 0.5f),
Vector3.Lerp(center, edge.v5, 0.5f));
TriangulateEdgeStrip(m, weights1, cell.Index, edge, weights1, cell.Index);
TriangulateEdgeFan(center, m, cell.Index);
}
//仅处理无临边的情况
private void NoNeighborConnection(HexDirectionEnum direction, HexCell cell, EdgeVertices edge)
{
Vector3 center = cell.Position;
Vector3 bridge = HexMetrics.GetOneBridge(direction);
Vector3 v3 = edge.v1 + bridge;
Vector3 v4 = edge.v5 + bridge;
Vector3 v5 = center + HexMetrics.GetFirstCorner(direction);
Vector3 v6 = center + HexMetrics.GetSecondCorner(direction);
HexCell prevNeighbor = cell.GetNeighbor(direction.Previous());
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
v6.y = v5.y = v4.y = v3.y = 0;
EdgeVertices edge2 = new EdgeVertices(v5, v6);
if (nextNeighbor == null && prevNeighbor != null)
{
edge2 = new EdgeVertices(v3, v6);
HexCell noneCell = new GameObject().AddComponent <HexCell>();
noneCell.Index = cell.Index;
TriangulateCorner(edge.v1, cell, v5, prevNeighbor, v3, noneCell);
DestroyObject(noneCell.gameObject);
}
if (cell.Elevation == HexMetrics.elevationDiffer)
{
TriangulateEdgeTerraces(edge, cell, edge2, cell, cell.HasRoadThroughEdge(direction));
}
else
{
TriangulateEdgeStrip(edge, weights1, cell.Index, edge2, weights1, cell.Index, cell.HasRoadThroughEdge(direction));
}
}
//仅处理无临边的情况
private void NoNeighborConnection(HexDirectionEnum direction, HexCell cell, Vector3 v1, Vector3 v2)
{
Vector3 center = cell.center;
Vector3 bridge = HexMetrics.GetOneBridge(direction);
Vector3 v3 = v1 + bridge;
Vector3 v4 = v2 + bridge;
Vector3 v5 = center + HexMetrics.GetFirstCorner(direction);
Vector3 v6 = center + HexMetrics.GetSecondConrner(direction);
HexCell prevNeighbor = cell.GetNeighbor(direction.Previous());
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
Vector3 v7 = v5;
Vector3 v8 = v6;
if (nextNeighbor == null && prevNeighbor != null)
{
v7 = v3;
v8 = v6;
Color firstColor = (cell.color + cell.color + prevNeighbor.color) / 3f;
AddTriangle(v1, v5, v3);
AddTriangleColor(cell.color, firstColor, cell.color);
}
AddQuad(v1, v2, v7, v8);
AddQuadColor(cell.color);
}
private void RightTrangulateConnection(HexDirectionEnum direction, HexCell cell, Vector3 v1, Vector3 v2)
{
HexCell neighbor = cell.GetNeighbor(direction);
if (neighbor == null)
{
NoNeighborConnection(direction, cell, v1, v2);
return;
}
Vector3 bridge = HexMetrics.GetTwoBridge(direction);
Vector3 v3 = v1 + bridge;
Vector3 v4 = v2 + bridge;
AddQuad(v1, v2, v3, v4);
AddQuadColor(cell.color, neighbor.color);
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
if (nextNeighbor != null)
{
AddTriangle(v2, v4, v2 + HexMetrics.GetTwoBridge(direction.Next()));
AddTriangleColor(cell.color, neighbor.color, nextNeighbor.color);
}
else
{
//绘制缺失的小三角
AddTriangle(v2, v4, cell.center + HexMetrics.GetSecondConrner(direction));
AddTriangleColor(cell.color, neighbor.color, (cell.color + neighbor.color) * 0.5f);
}
//绘制缺失的小三角
HexCell prevNeighbor = cell.GetNeighbor(direction.Previous());
if (prevNeighbor == null)
{
AddTriangle(v1, cell.center + HexMetrics.GetFirstCorner(direction), v3);
AddTriangleColor(cell.color, (cell.color + cell.color + neighbor.color) / 3f, neighbor.color);
}
}
private void TriangulateOpenWater(HexDirectionEnum direction, HexCell cell, HexCell neighbor, Vector3 center)
{
Vector3 c1 = center + HexMetrics.GetWaterFirstCorner(direction);
Vector3 c2 = center + HexMetrics.GetWaterSecondCorner(direction);
water.AddPerturTriangle(center, c1, c2);
Vector3 indices;
indices.x = indices.y = indices.z = cell.Index;
water.AddTriangleCellData(indices, weights1);
if (neighbor != null && DirectionOnRight(direction))
{
Vector3 bridge = HexMetrics.GetWaterBridge(direction);
Vector3 e1 = c1 + bridge;
Vector3 e2 = c2 + bridge;
water.AddPerturQuad(c1, c2, e1, e2);
indices.y = neighbor.Index;
water.AddQuadCellData(indices, weights1, weights2);
if (direction == HexDirectionEnum.TopRight || direction == HexDirectionEnum.Right)
{
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
if (nextNeighbor == null || !nextNeighbor.IsUnderWater)
{
return;
}
water.AddPerturTriangle(c2, e2, c2 + HexMetrics.GetWaterBridge(direction.Next()));
indices.z = nextNeighbor.Index;
water.AddTriangleCellData(indices, weights1, weights2, weights3);
}
}
}
private Vector2 GetRoadInterpolators(HexDirectionEnum direction, HexCell cell)
{
Vector2 interpolators = new Vector2();
if (cell.HasRoadThroughEdge(direction))
{
interpolators.x = interpolators.y = 0.5f;
}
else
{
interpolators.x = cell.HasRoadThroughEdge(direction.Previous( )) ? 0.5f : 0.25f;
interpolators.y = cell.HasRoadThroughEdge(direction.Next( )) ? 0.5f : 0.25f;
}
return(interpolators);
}
private int CreateRiver(HexCell origin)
{
int length = 1;
HexCell cell = origin;
HexDirectionEnum direction = HexDirectionEnum.BottomLeft;
while (!cell.IsUnderWater)
{
int minNeighbirElevation = int.MaxValue;
flowDirections.Clear();
for (HexDirectionEnum d = 0; d < HexDirectionEnum.Length; d++)
{
HexCell neighbor = cell.GetNeighbor(d);
if (!neighbor)
{
continue;
}
if (neighbor.Elevation < minNeighbirElevation)
{
minNeighbirElevation = neighbor.Elevation;
}
if (neighbor == origin || neighbor.HasInComingRiver)
{
continue;
}
int delta = neighbor.Elevation - cell.Elevation;
if (delta > 0)
{
continue;
}
if (neighbor.HasOutGoingRive)
{
cell.SetOutGoingRiver(d);
return(length);
}
if (neighbor.IsUnderWater)
{
cell.SetOutGoingRiver(d);
return(length);
}
if (delta <= 0)
{
flowDirections.Add(d);
flowDirections.Add(d);
flowDirections.Add(d);
}
if (length == 1 || (d != direction.Next(2) && d != direction.Previous(2)))
{
flowDirections.Add(d);
}
flowDirections.Add(d);
}
if (flowDirections.Count <= 0)
{
if (length == 1)
{
return(0);
}
if (minNeighbirElevation >= cell.Elevation)
{
cell.WaterLevel = minNeighbirElevation;
if (minNeighbirElevation == cell.Elevation)
{
cell.Elevation = minNeighbirElevation - 1;
}
}
break;
}
direction = flowDirections[Random.Range(0, flowDirections.Count)];
cell.SetOutGoingRiver(direction);
length += 1;
if (minNeighbirElevation >= cell.Elevation && Random.value < extraLakeProbability)
{
cell.WaterLevel = cell.Elevation;
cell.Elevation -= 1;
}
cell = cell.GetNeighbor(direction);
}
return(length);
}
private void TriangulateRoadAdjacentToRiver(HexDirectionEnum direction, HexCell cell, Vector3 center, EdgeVertices edge)
{
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.InComingRive == cell.OutGoingRive.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;
//桥梁
if (cell.InComingRive == direction.Next() && cell.HasRoadThroughEdge(direction.Next(2)) || cell.HasRoadThroughEdge(direction.Opposite()))
{
feature.AddBridge(roadCenter, center - corner * 0.5f);
}
center += corner * 0.25f;
}
else if (cell.InComingRive == cell.OutGoingRive.Previous( ))
{
roadCenter -= HexMetrics.GetSecondCorner(cell.InComingRive) * 0.2f;
}
else if (cell.InComingRive == cell.OutGoingRive.Next( ))
{
roadCenter -= HexMetrics.GetFirstCorner(cell.InComingRive) * 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
{
HexDirectionEnum 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;
//桥梁
if (direction == middle && cell.HasRoadThroughEdge(direction.Opposite()))
{
feature.AddBridge(roadCenter, center - offset * (HexMetrics.innerToOuter * 0.7f));
}
}
Vector3 mL = Vector3.Lerp(roadCenter, edge.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, edge.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, edge, hasRoadThroughEdge, cell.Index);
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL, cell.Index);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center, cell.Index);
}
}
private void TrangulateConnection(HexDirectionEnum direction, HexCell cell, EdgeVertices edge)
{
HexCell neighbor = cell.GetNeighbor(direction);
if (neighbor == null)
{
//NoNeighborConnection( direction , cell , edge ) ;
return;
}
Vector3 bridge = HexMetrics.GetTwoBridge(direction);
bridge.y = neighbor.Position.y - cell.Position.y;
EdgeVertices edge2 = new EdgeVertices(edge.v1 + bridge, edge.v5 + bridge);
bool hasRiver = cell.HasRiverThroughEdge(direction);
bool hasRoad = cell.HasRoadThroughEdge(direction);
if (hasRiver)
{
edge2.v3.y = neighbor.StreamBedHight;
Vector3 indices;
indices.x = indices.z = cell.Index;
indices.y = neighbor.Index;
if (!cell.IsUnderWater)
{
if (!neighbor.IsUnderWater)
{
TriangulateRiverQuad(edge.v2, edge.v4, edge2.v2, edge2.v4, cell.RiverSurfaceHight,
neighbor.RiverSurfaceHight, 0.8f,
cell.HasInComingRiver && cell.InComingRive == direction, indices);
}
else if (cell.Elevation > neighbor.WaterLevel)
{
TriangulateWaterFallInWater(edge.v2, edge.v4, edge2.v2, edge2.v4, cell.RiverSurfaceHight,
neighbor.RiverSurfaceHight, neighbor.WaterSurfaceHight, indices);
}
}
else if (!neighbor.IsUnderWater && neighbor.Elevation > cell.WaterLevel)
{
TriangulateWaterFallInWater(edge2.v4, edge2.v2, edge.v4, edge.v2, neighbor.RiverSurfaceHight,
cell.RiverSurfaceHight, cell.WaterSurfaceHight, indices);
}
}
if (cell.GetEdgeType(direction) == HexEdgeType.Slope)
{
TriangulateEdgeTerraces(edge, cell, edge2, neighbor, hasRoad);
}
else
{
TriangulateEdgeStrip(edge, weights1, cell.Index, edge2, weights2, neighbor.Index, hasRoad);
}
feature.AddWall(edge, cell, edge2, neighbor, hasRiver, hasRoad);
//处理三角形
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
if (nextNeighbor != null)
{
//避免重复绘制，只绘制左上和上方的三角
if (direction != HexDirectionEnum.BottomRight)
{
Vector3 v5 = edge.v5 + HexMetrics.GetTwoBridge(direction.Next());
v5.y = nextNeighbor.Position.y;
if (cell.Elevation <= neighbor.Elevation)
{
if (cell.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(edge.v5, cell, edge2.v5, neighbor, v5, nextNeighbor);
}
else
{
TriangulateCorner(v5, nextNeighbor, edge.v5, cell, edge2.v5, neighbor);
}
}
else if (neighbor.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(edge2.v5, neighbor, v5, nextNeighbor, edge.v5, cell);
}
else
{
TriangulateCorner(v5, nextNeighbor, edge.v5, cell, edge2.v5, neighbor);
}
}
}
/*else {
*
* //绘制缺失的小三角
* HexCell noneCell = new GameObject().AddComponent<HexCell>() ;
* noneCell.Index = neighbor.Index ;
* Vector3 v5 = cell.postion + HexMetrics.GetSecondCorner( direction ) ;
* v5.y = 0 ;
* TriangulateCorner( edge.v5 , cell , edge2.v5 , neighbor , v5 , noneCell ) ;
* DestroyObject( noneCell.gameObject ) ;
* }
*
* //绘制缺失的小三角
* HexCell prevNeighbor = cell.GetNeighbor( direction.Previous() ) ;
* if ( prevNeighbor == null ) {
* HexCell noneCell = new GameObject().AddComponent<HexCell>() ;
* noneCell.Index = neighbor.Index;
* Vector3 v5 = cell.postion + HexMetrics.GetFirstCorner( direction ) ;
* v5.y = 0 ;
* TriangulateCorner( edge.v1 , cell , v5 , noneCell , edge2.v1 , neighbor) ;
* DestroyObject( noneCell.gameObject ) ;
* }*/
}
private void TriangulateWaterShore(HexDirectionEnum direction, HexCell cell, HexCell neighbor, Vector3 center)
{
Vector3 c1 = center + HexMetrics.GetWaterFirstCorner(direction);
Vector3 c2 = center + HexMetrics.GetWaterSecondCorner(direction);
EdgeVertices e1 = new EdgeVertices(c1, c2);
water.AddPerturTriangle(center, e1.v1, e1.v2);
water.AddPerturTriangle(center, e1.v2, e1.v3);
water.AddPerturTriangle(center, e1.v3, e1.v4);
water.AddPerturTriangle(center, e1.v4, e1.v5);
Vector3 indices;
indices.x = indices.z = cell.Index;
indices.y = neighbor.Index;
water.AddTriangleCellData(indices, weights1);
water.AddTriangleCellData(indices, weights1);
water.AddTriangleCellData(indices, weights1);
water.AddTriangleCellData(indices, weights1);
Vector3 center2 = neighbor.Position;
if (neighbor.ColumnIndex < cell.ColumnIndex - 1)
{
center2.x += HexMetrics.wrapSize * HexMetrics.innerDiameter;
}
else if (neighbor.ColumnIndex > cell.ColumnIndex + 1)
{
center2.x -= HexMetrics.wrapSize * HexMetrics.innerDiameter;
}
center2.y = center.y;
EdgeVertices e2 = new EdgeVertices(center2 + HexMetrics.GetSecondSolidCorner(direction.Opposite()),
center2 + HexMetrics.GetFirstSolidCorner(direction.Opposite()));
if (cell.HasRiverThroughEdge(direction))
{
TriangulateEstuary(e1, e2, cell.HasInComingRiver && cell.InComingRive == direction, indices);
}
else
{
waterShore.AddPerturQuad(e1.v1, e1.v2, e2.v1, e2.v2);
waterShore.AddPerturQuad(e1.v2, e1.v3, e2.v2, e2.v3);
waterShore.AddPerturQuad(e1.v3, e1.v4, e2.v3, e2.v4);
waterShore.AddPerturQuad(e1.v4, e1.v5, e2.v4, e2.v5);
waterShore.AddQuadUV(0f, 0f, 0f, 1f);
waterShore.AddQuadUV(0f, 0f, 0f, 1f);
waterShore.AddQuadUV(0f, 0f, 0f, 1f);
waterShore.AddQuadUV(0f, 0f, 0f, 1f);
waterShore.AddQuadCellData(indices, weights1, weights2);
waterShore.AddQuadCellData(indices, weights1, weights2);
waterShore.AddQuadCellData(indices, weights1, weights2);
waterShore.AddQuadCellData(indices, weights1, weights2);
}
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
if (nextNeighbor != null)
{
Vector3 center3 = nextNeighbor.Position;
if (nextNeighbor.ColumnIndex < cell.ColumnIndex - 1)
{
center3.x += HexMetrics.wrapSize * HexMetrics.innerDiameter;
}
else if (nextNeighbor.ColumnIndex > cell.ColumnIndex + 1)
{
center3.x -= HexMetrics.wrapSize * HexMetrics.innerDiameter;
}
Vector3 v3 = center3 + (nextNeighbor.IsUnderWater
? HexMetrics.GetWaterFirstCorner(direction.Previous())
: HexMetrics.GetFirstSolidCorner(direction.Previous()));
v3.y = center.y;
waterShore.AddPerturTriangle(e1.v5, e2.v5, v3);
waterShore.AddTriangleUV(Vector2.zero, Vector2.up, nextNeighbor.IsUnderWater ? Vector2.zero : Vector2.up);
indices.z = nextNeighbor.Index;
waterShore.AddTriangleCellData(indices, weights1, weights2, weights3);
}
}
//下一个三角
public static HexDirectionEnum Next(this HexDirectionEnum direction)
{
/*direction += 1 ;
* if ( direction >= HexDirectionEnum.Length ) direction -= (int) HexDirectionEnum.Length ;*/
return(direction.Next(1));
}
