void TriangulateEdgeTerraces(
EdgeVertices begin, HexCell beginCell,
EdgeVertices end, HexCell endCell, bool hasRoad = false)
{
EdgeVertices e2 = EdgeVertices.TerraceLerp(begin, end, 1);
Color c2 = HexMetrics.TerraceLerp(color1, color2, 1);
float t1 = beginCell.terrainTypeIndex;
float t2 = endCell.terrainTypeIndex;
// first step
TriangulateEdgeStrip(begin, color1, t1, e2, c2, t2, hasRoad);
for (int i = 2; i < HexMetrics.terracedSteps; i++)
{
EdgeVertices e1 = e2;
Color c1 = c2;
e2 = EdgeVertices.TerraceLerp(begin, end, i);
c2 = HexMetrics.TerraceLerp(color1, color2, i);
TriangulateEdgeStrip(e1, c1, t1, e2, c2, t2, hasRoad);
}
// last step
TriangulateEdgeStrip(e2, c2, t1, end, color2, t2, hasRoad);
}
void TriangulateBoundaryTriangle(
Vector3 bottom, Color beginColor,
Vector3 left, Color leftColor,
Vector3 boundary, Color boundaryColor, Vector3 types)
{
Vector3 v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(bottom, left, 1));
Color c2 = HexMetrics.TerraceLerp(beginColor, leftColor, 1);
terrain.AddTriangleUnperturbed(HexMetrics.Perturb(bottom), v2, boundary);
terrain.AddTriangleColor(beginColor, c2, boundaryColor);
terrain.AddTriangleTerrainTypes(types);
for (int i = 2; i < HexMetrics.terracedSteps; i++)
{
Vector3 v1 = v2;
Color c1 = c2;
v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(bottom, left, i));
c2 = HexMetrics.TerraceLerp(beginColor, leftColor, i);
terrain.AddTriangleUnperturbed(v1, v2, boundary);
terrain.AddTriangleColor(c1, c2, boundaryColor);
terrain.AddTriangleTerrainTypes(types);
}
terrain.AddTriangleUnperturbed(v2, HexMetrics.Perturb(left), boundary);
terrain.AddTriangleColor(c2, leftColor, boundaryColor);
terrain.AddTriangleTerrainTypes(types);
}
public static EdgeVertices TerraceLerp(EdgeVertices a, EdgeVertices b, int step)
{
return(new EdgeVertices {
v1 = HexMetrics.TerraceLerp(a.v1, b.v1, step),
v2 = HexMetrics.TerraceLerp(a.v2, b.v2, step),
v3 = HexMetrics.TerraceLerp(a.v3, b.v3, step),
v4 = HexMetrics.TerraceLerp(a.v4, b.v4, step),
v5 = HexMetrics.TerraceLerp(a.v5, b.v5, step)
});
}
void TriangulateCornerTerraces(
Vector3 bottom, HexCell bottomCell,
Vector3 left, HexCell leftCell,
Vector3 right, HexCell rightCell)
{
Vector3 v3 = HexMetrics.TerraceLerp(bottom, left, 1);
Vector3 v4 = HexMetrics.TerraceLerp(bottom, right, 1);
Color c3 = HexMetrics.TerraceLerp(color1, color2, 1);
Color c4 = HexMetrics.TerraceLerp(color1, color3, 1);
Vector3 types;
types.x = bottomCell.terrainTypeIndex;
types.y = leftCell.terrainTypeIndex;
types.z = rightCell.terrainTypeIndex;
// first step
terrain.AddTriangle(bottom, v3, v4);
terrain.AddTriangleColor(color1, c3, c4);
terrain.AddTriangleTerrainTypes(types);
for (int i = 2; i < HexMetrics.terracedSteps; i++)
{
Vector3 v1 = v3;
Vector3 v2 = v4;
Color c1 = c3;
Color c2 = c4;
v3 = HexMetrics.TerraceLerp(bottom, left, i);
v4 = HexMetrics.TerraceLerp(bottom, right, i);
c3 = HexMetrics.TerraceLerp(color1, color2, i);
c4 = HexMetrics.TerraceLerp(color1, color3, i);
terrain.AddQuad(v1, v2, v3, v4);
terrain.AddQuadColor(c1, c2, c3, c4);
terrain.AddQuadTerrainTypes(types);
}
// right step
terrain.AddQuad(v3, v4, left, right);
terrain.AddQuadColor(c3, c4, color2, color3);
terrain.AddQuadTerrainTypes(types);
}
