// Triangulate a corner with half terraces, half flat - Cliff on the left
void TriangulateCornerCliffTerraces(Vector3 begin, HexCell beginCell, Vector3 left, HexCell leftCell, Vector3 right, HexCell rightCell)
{
float b = 1f / (leftCell.Elevation - beginCell.Elevation);
if (b < 0)
{
b = -b;
}
Vector3 boundary = Vector3.Lerp(HexMetrics.Perturb(begin), HexMetrics.Perturb(left), b); // boundary is on a pertubed slope
Color boundaryColor = Color.Lerp(beginCell.Color, leftCell.Color, b);
TriangulateBoundaryTriangle(right, rightCell, begin, beginCell, boundary, boundaryColor);
if (leftCell.GetEdgeType(rightCell) == HexEdgeType.Slope)
{
TriangulateBoundaryTriangle(left, leftCell, right, rightCell, boundary, boundaryColor);
}
else
{
terrain.AddTriangleUnpertubed(HexMetrics.Perturb(left), HexMetrics.Perturb(right), boundary);
terrain.AddTriangleColor(leftCell.Color, rightCell.Color, boundaryColor);
}
}
private void TriangulateCornerTerraces(
Vector3 begin, HexCell beginCell,
Vector3 left, HexCell leftCell,
Vector3 right, HexCell rightCell
)
{
Vector3 v3 = HexMetrics.TerraceLerp(begin, left, 1);
Vector3 v4 = HexMetrics.TerraceLerp(begin, right, 1);
Color w3 = HexMetrics.TerraceLerp(weights1, weights2, 1);
Color w4 = HexMetrics.TerraceLerp(weights1, weights3, 1);
Vector3 indices;
indices.x = beginCell.Index;
indices.y = leftCell.Index;
indices.z = rightCell.Index;
terrain.AddTriangle(begin, v3, v4);
terrain.AddTriangleCellData(indices, weights1, w3, w4);
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
Vector3 v1 = v3;
Vector3 v2 = v4;
Color w1 = w3;
Color w2 = w4;
v3 = HexMetrics.TerraceLerp(begin, left, i);
v4 = HexMetrics.TerraceLerp(begin, right, i);
w3 = HexMetrics.TerraceLerp(weights1, weights2, i);
w4 = HexMetrics.TerraceLerp(weights1, weights3, i);
terrain.AddQuad(v1, v2, v3, v4);
terrain.AddQuadCellData(indices, w1, w2, w3, w4);
}
terrain.AddQuad(v3, v4, left, right);
terrain.AddQuadCellData(indices, w3, w4, weights2, weights3);
}
private void TriangulateEdgeTerraces(
EdgeVertices begin, HexCell beginCell,
EdgeVertices end, HexCell endCell,
bool hasRoad
)
{
EdgeVertices e2 = EdgeVertices.TerraceLerp(begin, end, 1);
Color w2 = HexMetrics.TerraceLerp(weights1, weights2, 1);
float i1 = beginCell.Index;
float i2 = endCell.Index;
TriangulateEdgeStrip(begin, weights1, i1, e2, w2, i2, hasRoad);
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
EdgeVertices e1 = e2;
Color w1 = w2;
e2 = EdgeVertices.TerraceLerp(begin, end, i);
w2 = HexMetrics.TerraceLerp(weights1, weights2, i);
TriangulateEdgeStrip(e1, w1, i1, e2, w2, i2, hasRoad);
}
TriangulateEdgeStrip(e2, w2, i1, end, weights2, i2, hasRoad);
}
// Make a terrace in a corner, each terrace end in the boundary
void TriangulateBoundaryTriangle(Vector3 begin, HexCell beginCell, Vector3 left, HexCell leftCell, Vector3 boundary, Color boundaryColor)
{
Vector3 v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, 1));
Color c2 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, 1);
// The first step is a triangle
terrain.AddTriangleUnpertubed(HexMetrics.Perturb(begin), v2, boundary);
terrain.AddTriangleColor(beginCell.Color, c2, boundaryColor);
// All the steps are triangles
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
Vector3 v1 = v2;
Color c1 = c2;
v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, i));
c2 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, i);
terrain.AddTriangleUnpertubed(v1, v2, boundary);
terrain.AddTriangleColor(c1, c2, boundaryColor);
}
// The last step is a triangle
terrain.AddTriangleUnpertubed(v2, HexMetrics.Perturb(left), boundary);
terrain.AddTriangleColor(c2, leftCell.Color, boundaryColor);
}
void TriangulateEdgeTerraces(Vector3 beginLeft, Vector3 beginRight, HexCell beginCell, Vector3 endLeft, Vector3 endRight, HexCell endCell)
{
Vector3 v3 = HexMetrics.TerraceLerp(beginLeft, endLeft, 1);
Vector3 v4 = HexMetrics.TerraceLerp(beginRight, endRight, 1);
Color c2 = HexMetrics.TerraceLerp(beginCell.Color, endCell.Color, 1);
AddQuad(beginLeft, beginRight, v3, v4);
AddQuadColor(beginCell.Color, c2);
for (int i = 2; i < HexMetrics.TerraceSteps; i++)
{
Vector3 v1 = v3;
Vector3 v2 = v4;
Color c1 = c2;
v3 = HexMetrics.TerraceLerp(beginLeft, endLeft, i);
v4 = HexMetrics.TerraceLerp(beginRight, endRight, i);
c2 = HexMetrics.TerraceLerp(beginCell.Color, endCell.Color, i);
AddQuad(v1, v2, v3, v4);
AddQuadColor(c1, c2);
}
AddQuad(v3, v4, endLeft, endRight);
AddQuadColor(c2, endCell.Color);
}
private void TriangulateConnection(
HexDirection direction, HexCell cell, EdgeVertices e1
)
{
HexCell neighbor = cell.GetNeighbor(direction);
if (neighbor == null)
{
return;
}
Vector3 bridge = HexMetrics.GetBridge(direction);
bridge.y = neighbor.Position.y - cell.Position.y;
EdgeVertices e2 = new EdgeVertices(
e1.v1 + bridge,
e1.v5 + bridge
);
bool hasRiver = cell.HasRiverThroughEdge(direction);
bool hasRoad = cell.HasRoadThroughEdge(direction);
if (hasRiver)
{
e2.v3.y = neighbor.StreamBedY;
Vector3 indices;
indices.x = indices.z = cell.Index;
indices.y = neighbor.Index;
if (!cell.IsUnderwater)
{
if (!neighbor.IsUnderwater)
{
TriangulateRiverQuad(
e1.v2, e1.v4, e2.v2, e2.v4,
cell.RiverSurfaceY, neighbor.RiverSurfaceY, 0.8f,
cell.HasIncomingRiver && cell.IncomingRiver == direction, indices
);
}
else if (cell.Elevation > neighbor.WaterLevel)
{
TriangulateWaterfallInWater(
e1.v2, e1.v4, e2.v2, e2.v4,
cell.RiverSurfaceY, neighbor.RiverSurfaceY,
neighbor.WaterSurfaceY, indices
);
}
}
else if (!neighbor.IsUnderwater && neighbor.Elevation > cell.WaterLevel)
{
TriangulateWaterfallInWater(
e2.v4, e2.v2, e1.v4, e1.v2,
neighbor.RiverSurfaceY, cell.RiverSurfaceY,
cell.WaterSurfaceY, indices
);
}
}
if (cell.GetEdgeType(direction) == HexEdgeType.Slope)
{
TriangulateEdgeTerraces(e1, cell, e2, neighbor, hasRoad);
}
else
{
TriangulateEdgeStrip(
e1, weights1, cell.Index,
e2, weights2, neighbor.Index, hasRoad
);
}
features.AddWall(e1, cell, e2, neighbor, hasRiver, hasRoad);
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
if (direction <= HexDirection.E && nextNeighbor != null)
{
Vector3 v5 = e1.v5 + HexMetrics.GetBridge(direction.Next());
v5.y = nextNeighbor.Position.y;
if (cell.Elevation <= neighbor.Elevation)
{
if (cell.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(
e1.v5, cell, e2.v5, neighbor, v5, nextNeighbor
);
}
else
{
TriangulateCorner(
v5, nextNeighbor, e1.v5, cell, e2.v5, neighbor
);
}
}
else if (neighbor.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(
e2.v5, neighbor, v5, nextNeighbor, e1.v5, cell
);
}
else
{
TriangulateCorner(
v5, nextNeighbor, e1.v5, cell, e2.v5, neighbor
);
}
}
}
private 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
);
}
}
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;
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 TriangulateWaterShore(
HexDirection direction, HexCell cell, HexCell neighbor, Vector3 center
)
{
EdgeVertices e1 = new EdgeVertices(
center + HexMetrics.GetFirstWaterCorner(direction),
center + HexMetrics.GetSecondWaterCorner(direction)
);
water.AddTriangle(center, e1.v1, e1.v2);
water.AddTriangle(center, e1.v2, e1.v3);
water.AddTriangle(center, e1.v3, e1.v4);
water.AddTriangle(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.IncomingRiver == direction, indices);
}
else
{
waterShore.AddQuad(e1.v1, e1.v2, e2.v1, e2.v2);
waterShore.AddQuad(e1.v2, e1.v3, e2.v2, e2.v3);
waterShore.AddQuad(e1.v3, e1.v4, e2.v3, e2.v4);
waterShore.AddQuad(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.GetFirstWaterCorner(direction.Previous()) :
HexMetrics.GetFirstSolidCorner(direction.Previous()));
v3.y = center.y;
waterShore.AddTriangle(e1.v5, e2.v5, v3);
waterShore.AddTriangleUV(
new Vector2(0f, 0f),
new Vector2(0f, 1f),
new Vector2(0f, nextNeighbor.IsUnderwater ? 0f : 1f)
);
indices.z = nextNeighbor.Index;
waterShore.AddTriangleCellData(
indices, weights1, weights2, weights3
);
}
}
public Mesh ElevatedTileHexagon(HexMetrics metrics, HexMap hexMap, int column, int row, Mesh recycleMesh = null)
{
ClearAndSetup("Hexagon Tile With Elevation", recycleMesh);
Vector3 center = HexUtils.PositionFromCoordinates(column, row, metrics.tileSize);
int elevation = hexMap.GetElevationAt(column, row);
float elevationHeight = metrics.elevationStepHeight * elevation;
Color baseColor = hexMap.tileset.GetColorForElevation(elevation, metrics.maxElevation);
float centerHeight = metrics.XZPositionToHeight(center);
float[] cornerHeights = new float[6];
foreach (var corner in HexCornerUtils.AllCorners())
{
Vector3 vertex = HexUtils.CornerPosition((int)corner) * metrics.tileSize;
cornerHeights[corner.GetInt()] = metrics.XZPositionToHeight(center + vertex);
}
#region Base Hexagon
float baseHexagonPercentage = metrics.tileInnerRadiusPercent;
// Add vertex data for each corner first in order to reduce redundancy (18 vertices -> 7)
// Not making triangles yet
foreach (HexCorner corner in HexCornerUtils.AllCorners())
{
// Vertice w/ height
//Vector3 cornerPoint = SpokePoint(metrics, corner, baseHexagonPercentage, centerHeight, cornerHeights);
// Base the height of the 'spokes' on the straight line from the center out to the corner of the whole tile
Vector3 cornerVertex = HexUtils.CornerPosition((int)corner) * metrics.tileSize * baseHexagonPercentage;
float projectedSpokeHeight = (cornerHeights[corner.GetInt()] - centerHeight)
* baseHexagonPercentage;
float vertexHeight = centerHeight + projectedSpokeHeight;
Vector3 cornerPoint = cornerVertex + Vector3.up * (vertexHeight * metrics.mapHeight + elevationHeight);
float textureGradient = vertexHeight;
AddHexPointData(metrics, cornerPoint, center, baseColor, textureGradient);
}
// Add the center point last just so that we can use the HexCorner enums as indexes and the center is @ 6
int Center = 6; // just for readability
// UV
uvs.Add(metrics.XZPositionToUV(center));
// Vertice
Vector3 centerVertex = new Vector3(0, centerHeight * metrics.mapHeight + elevationHeight, 0);
vertices.Add(centerVertex);
// Color
colors.Add(baseColor);
// Gradient
uvs2.Add(new Vector2(centerHeight, 0));
// Make triangles
foreach (HexCorner corner in HexCornerUtils.AllCorners())
{
triangles.Add((int)corner.Next()); // Next first because of normals
triangles.Add((int)corner);
triangles.Add(Center);
}
#endregion
// The starting index of the points for the outer ring
int ringStartIndex = vertices.Count; // should be 7 here
// ----------Add another ring to the hexagon
#region First Ring
float firstRingPercentage = metrics.tileOuterRadiusPercent;
// Add vertex data for each outside corner
// Not making triangles yet
// Add three points for each corner: the actual outside corner and then the two bridge points
foreach (HexCorner corner in HexCornerUtils.AllCorners())
{
HexDirection direction = corner.GetDirection();
float theta = HexUtils.CornerAngle((int)corner);
//// We need to account for the three walls connecting to this corner:
//// the wall on this hex going left,
//// the wall on this hex going right,
//// and the wall adjacent to this hex running out and away
//bool leftWall = hexMap.IsWallAt(column, row, corner.GetDirection());
//bool rightWall = hexMap.IsWallAt(column, row, corner.GetDirection().Last());
//// move to the hex left of the given corner, turn two directions CW and check that wall
//bool awayWall = hexMap.IsWallAt(HexUtils.MoveFrom(column, row, corner.GetDirection()), corner.GetDirection().Last2());
// -------Actual Corner---------- -
{
Vector3 cornerVertex = HexUtils.CornerPosition((int)corner) * metrics.tileSize * firstRingPercentage;
float nextNeighborElevationHeight = metrics.elevationStepHeight *
hexMap.GetElevationAt(HexUtils.MoveFrom(column, row, direction));
float lastNeighborElevationHeight = metrics.elevationStepHeight *
hexMap.GetElevationAt(HexUtils.MoveFrom(column, row, direction.Last()));
float heightModFromElevation =
(elevationHeight + nextNeighborElevationHeight + lastNeighborElevationHeight) * 0.33f;
float projectedSpokeHeight = (cornerHeights[corner.GetInt()] - centerHeight)
* firstRingPercentage;
float vertexHeight = centerHeight + projectedSpokeHeight;
Vector3 cornerPoint = cornerVertex +
Vector3.up * (vertexHeight * metrics.mapHeight + heightModFromElevation);
float textureGradient = vertexHeight;
bool isWall = hexMap.IsWallAt(column, row, direction.Last());
Color slopeColor = baseColor;
if (isWall)
{
slopeColor = hexMap.tileset.steepSlopeColor;
}
AddHexPointData(metrics, cornerPoint, center, slopeColor, textureGradient);
}
//// ------- CCW Bridge Point -----------
{
var fromCorner = corner;
var towardCorner = corner.Next();
var bridgePercentage = metrics.tileInnerRadiusPercent;
//Vector3 bridgePoint = BridgePoint(metrics, corner, corner.Next(), firstRingPercentage,
// metrics.tileInnerRadiusPercent, centerVertex, cornerHeights);
float nextNeighborElevationHeight = metrics.elevationStepHeight *
hexMap.GetElevationAt(HexUtils.MoveFrom(column, row, direction));
float heightModFromElevation =
(elevationHeight + nextNeighborElevationHeight) * 0.5f;
Vector3 cornerVertex = HexUtils.CornerPosition((int)fromCorner) * metrics.tileSize;
cornerVertex = cornerVertex +
Vector3.up * (cornerHeights[fromCorner.GetInt()] * metrics.mapHeight + heightModFromElevation);
Vector3 nextCornerPoint = HexUtils.CornerPosition(towardCorner.GetInt()) * metrics.tileSize;
nextCornerPoint = nextCornerPoint +
Vector3.up * (cornerHeights[towardCorner.GetInt()] * metrics.mapHeight + heightModFromElevation);
Vector3 vector = nextCornerPoint - cornerVertex;
float bridgeMod = 0.5f * (1f - bridgePercentage);
Vector3 bridgePoint = cornerVertex + vector * bridgeMod;
vector = centerVertex - bridgePoint;
bridgePoint = bridgePoint + vector * (1f - firstRingPercentage);
bool isWall = hexMap.IsWallAt(column, row, direction);
Color slopeColor = baseColor;
if (isWall)
{
slopeColor = hexMap.tileset.steepSlopeColor;
}
AddHexPointData(metrics, bridgePoint, center, slopeColor, cornerHeights[corner.GetInt()]);
}
//// ------- CW Bridge Point -----------
{
//Vector3 bridgePoint = BridgePoint(metrics, corner, corner.Last(), firstRingPercentage,
// metrics.tileInnerRadiusPercent, centerVertex, cornerHeights);
var fromCorner = corner;
var towardCorner = corner.Last();
var bridgePercentage = metrics.tileInnerRadiusPercent;
//Vector3 bridgePoint = BridgePoint(metrics, corner, corner.Next(), firstRingPercentage,
// metrics.tileInnerRadiusPercent, centerVertex, cornerHeights);
float neighborElevationHeight = metrics.elevationStepHeight *
hexMap.GetElevationAt(HexUtils.MoveFrom(column, row, direction.Last()));
float heightModFromElevation =
(elevationHeight + neighborElevationHeight) * 0.5f;
Vector3 cornerVertex = HexUtils.CornerPosition((int)fromCorner) * metrics.tileSize;
cornerVertex = cornerVertex +
Vector3.up * (cornerHeights[fromCorner.GetInt()] * metrics.mapHeight + heightModFromElevation);
Vector3 nextCornerPoint = HexUtils.CornerPosition(towardCorner.GetInt()) * metrics.tileSize;
nextCornerPoint = nextCornerPoint + Vector3.up * (cornerHeights[towardCorner.GetInt()] * metrics.mapHeight + heightModFromElevation);
Vector3 vector = nextCornerPoint - cornerVertex;
float bridgeMod = 0.5f * (1f - bridgePercentage);
Vector3 bridgePoint = cornerVertex + vector * bridgeMod;
vector = centerVertex - bridgePoint;
bridgePoint = bridgePoint + vector * (1f - firstRingPercentage);
bool isWall = hexMap.IsWallAt(column, row, direction.Last());
Color slopeColor = baseColor;
if (isWall)
{
slopeColor = hexMap.tileset.steepSlopeColor;
}
AddHexPointData(metrics, bridgePoint, center, slopeColor, cornerHeights[corner.GetInt()]);
}
}
// Make triangles, accounting for one corner and one side at a time
// we actually need quads, so pairs of triangles
foreach (HexCorner corner in HexCornerUtils.AllCorners())
{
// inside point is [corner], outside point is [corner * 3 + ORStart]
int outerCorner = (int)corner * 3 + ringStartIndex + 0;
// left bridge point is [corner * 3 + ORStart + 1], right bridge point is [corner * 3 + ORStart + 2]
int rightBridgePoint = (int)corner * 3 + ringStartIndex + 2;
int leftBridgePoint = (int)corner * 3 + ringStartIndex + 1;
// corner.Next() is the point CCW
int nextRightBridgePoint = (int)corner.Next() * 3 + ringStartIndex + 2;
// first half of the quad
triangles.Add((int)corner);
triangles.Add((int)corner.Next());
triangles.Add(nextRightBridgePoint);
// second half of the quad
triangles.Add(nextRightBridgePoint);
triangles.Add(leftBridgePoint);
triangles.Add((int)corner);
// span from the quad to the corner with a quad
triangles.Add(leftBridgePoint);
triangles.Add(outerCorner);
triangles.Add((int)corner);
// second part of corner span
triangles.Add(rightBridgePoint);
triangles.Add((int)corner);
triangles.Add(outerCorner);
}
#endregion
return(Build());
}
// Triangulate a cell for the direction given
void Triangulate(HexDirection direction, HexCell cell)
{
Vector3 center = cell.Position;
EdgeVertices e = new EdgeVertices(center + HexMetrics.GetFirstSolidCorner(direction), center + HexMetrics.GetSecondSolidCorner(direction));
if (cell.HasRiver)
{
if (cell.HasRiverThroughEdge(direction))
{
e.v3.y = cell.StreamBedY;
if (cell.HasRiverBeginOrEnd)
{
TriangulateWithRiverBeginOrEnd(direction, cell, center, e);
}
else
{
TriangulateWithRiver(direction, cell, center, e);
}
}
else
{
TriangulateAdjacentToRiver(direction, cell, center, e);
}
}
else
{
TriangulateWithoutRiver(direction, cell, center, e);
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f));
}
}
// Make the connection with the neightbors
if (direction <= HexDirection.SE)
{
TriangulateConnection(cell, direction, e);
}
if (cell.IsUnderwater)
{
TriangulateWater(direction, cell, center);
}
}
void TriangulateWaterShore(HexDirection direction, HexCell cell, HexCell neighbor, Vector3 center)
{
// Triangulate as a fan
EdgeVertices e1 = new EdgeVertices(center + HexMetrics.GetFirstWaterCorner(direction), center + HexMetrics.GetSecondWaterCorner(direction));
water.AddTriangle(center, e1.v1, e1.v2);
water.AddTriangle(center, e1.v2, e1.v3);
water.AddTriangle(center, e1.v3, e1.v4);
water.AddTriangle(center, e1.v4, e1.v5);
// Triangulate the strip
Vector3 center2 = neighbor.Position;
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.IncomingRiver == direction);
}
else
{
waterShore.AddQuad(e1.v1, e1.v2, e2.v1, e2.v2);
waterShore.AddQuad(e1.v2, e1.v3, e2.v2, e2.v3);
waterShore.AddQuad(e1.v3, e1.v4, e2.v3, e2.v4);
waterShore.AddQuad(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);
}
// Don't forget the corner triangle
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
if (nextNeighbor != null)
{
Vector3 v3 = nextNeighbor.Position + (nextNeighbor.IsUnderwater ? HexMetrics.GetFirstWaterCorner(direction.Previous()) : HexMetrics.GetFirstSolidCorner(direction.Previous()));
v3.y = center.y;
waterShore.AddTriangle(e1.v5, e2.v5, v3);
waterShore.AddTriangleUV(new Vector2(0f, 0f), new Vector2(0f, 1f), new Vector2(0f, nextNeighbor.IsUnderwater ? 0f : 1f));
}
}
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 river
if (cell.HasRiverBeginOrEnd)
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f);
}
// Check if river is a straight
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner;
if (previousHasRiver)
{
// Skip triangulation if there is no road on this side on=f the river
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next()))
{
return;
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
// Skip triangulation if there is no road on this side on=f the river
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous()))
{
return;
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
// Add bridge once per cell, if there is a 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;
}
// Check if river is a zigzag
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;
}
// Check if we are inside of a curve
else if (previousHasRiver && nextHasRiver)
{
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.innerToOutter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
// We are outside of a curve
else
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
if (!cell.HasRoadThroughEdge(middle.Previous()) && !cell.HasRoadThroughEdge(middle) && !cell.HasRoadThroughEdge(middle.Next()))
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle);
roadCenter += offset * 0.25f;
// Add bridge once per cell, if there is a road on both sides
if (direction == middle && cell.HasRoadThroughEdge(direction.Opposite()))
{
features.AddBridge(roadCenter, center - offset * (HexMetrics.innerToOutter * 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);
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center);
}
}
// Fill the gap between each cell in the direction given
void TriangulateConnection(HexCell cell, HexDirection direction, EdgeVertices e1)
{
HexCell neighbor = cell.GetNeighbor(direction);
if (neighbor == null)
{
return;
}
// Build the bridge
Vector3 bridge = HexMetrics.GetBridge(direction);
bridge.y = neighbor.Position.y - cell.Position.y;
EdgeVertices e2 = new EdgeVertices(e1.v1 + bridge, e1.v5 + bridge);
bool hasRiver = cell.HasRiverThroughEdge(direction);
bool hasRoad = cell.HasRoadThroughEdge(direction);
if (hasRiver)
{
e2.v3.y = neighbor.StreamBedY;
if (!cell.IsUnderwater)
{
if (!neighbor.IsUnderwater)
{
// Normal river
TriangulateRiverQuad(e1.v2, e1.v4, e2.v2, e2.v4, cell.RiverSurfaceY, neighbor.RiverSurfaceY, 0.8f, cell.HasIncomingRiver && cell.IncomingRiver == direction);
}
else if (cell.Elevation > neighbor.WaterLevel)
{
// Waterfall from cell to neighbor
TriangulateWaterfallInWater(e1.v2, e1.v4, e2.v2, e2.v4, cell.RiverSurfaceY, neighbor.RiverSurfaceY, neighbor.WaterSurfaceY);
}
}
else if (!neighbor.IsUnderwater && neighbor.Elevation > cell.WaterLevel)
{
// Waterfall from neighbor to cell
TriangulateWaterfallInWater(e2.v4, e2.v2, e1.v4, e1.v2, neighbor.RiverSurfaceY, cell.RiverSurfaceY, cell.WaterSurfaceY);
}
}
if (cell.GetEdgeType(direction) == HexEdgeType.Slope)
{
TriangulateEdgeTerraces(e1, cell, e2, neighbor, hasRoad);
}
else
{
TriangulateEdgeStrip(e1, cell.Color, e2, neighbor.Color, hasRoad);
}
features.AddWall(e1, cell, e2, neighbor, hasRiver, hasRoad);
// Filling the gap
HexCell nextNeighbor = cell.GetNeighbor(direction.Next());
if (direction <= HexDirection.E && nextNeighbor != null)
{
Vector3 v5 = e1.v5 + HexMetrics.GetBridge(direction.Next());
v5.y = nextNeighbor.Position.y;
// Find the lowest cell
if (cell.Elevation <= neighbor.Elevation)
{
if (cell.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(e1.v5, cell, e2.v5, neighbor, v5, nextNeighbor); // cell is the lowest
}
else
{
TriangulateCorner(v5, nextNeighbor, e1.v5, cell, e2.v5, neighbor); // nextNeighbor is the lowest
}
}
else if (neighbor.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(e2.v5, neighbor, v5, nextNeighbor, e1.v5, cell); // neighbor is the lowest
}
else
{
TriangulateCorner(v5, nextNeighbor, e1.v5, cell, e2.v5, neighbor); // nextNeighbor is the lowest
}
}
}
public HexEdgeType GetEdgeType(HexCell otherCell)
{
return(HexMetrics.GetEdgeType(Elevation, otherCell.Elevation));
}
public HexEdgeType GetEdgeType(HexDirection direction)
{
return(HexMetrics.GetEdgeType(Elevation, _neighbors[(int)direction].Elevation));
}
