private void TriangulateBoundaryTriangle(
Vector3 begin, Color beginWeights,
Vector3 left, Color leftWeights,
Vector3 boundary, Color boundaryWeights, Vector3 indices
)
{
Vector3 v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, 1));
Color w2 = HexMetrics.TerraceLerp(beginWeights, leftWeights, 1);
terrain.AddTriangleUnperturbed(HexMetrics.Perturb(begin), v2, boundary);
terrain.AddTriangleCellData(indices, beginWeights, w2, boundaryWeights);
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
Vector3 v1 = v2;
Color w1 = w2;
v2 = HexMetrics.Perturb(HexMetrics.TerraceLerp(begin, left, i));
w2 = HexMetrics.TerraceLerp(beginWeights, leftWeights, i);
terrain.AddTriangleUnperturbed(v1, v2, boundary);
terrain.AddTriangleCellData(indices, w1, w2, boundaryWeights);
}
terrain.AddTriangleUnperturbed(v2, HexMetrics.Perturb(left), boundary);
terrain.AddTriangleCellData(indices, w2, leftWeights, boundaryWeights);
}
// Triangulate a corner with terraces
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 c3 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, 1);
Color c4 = HexMetrics.TerraceLerp(beginCell.Color, rightCell.Color, 1);
// The first step is a triangle
terrain.AddTriangle(begin, v3, v4);
terrain.AddTriangleColor(beginCell.Color, c3, c4);
// All the steps are quads
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
Vector3 v1 = v3;
Vector3 v2 = v4;
Color c1 = c3;
Color c2 = c4;
v3 = HexMetrics.TerraceLerp(begin, left, i);
v4 = HexMetrics.TerraceLerp(begin, right, i);
c3 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, i);
c4 = HexMetrics.TerraceLerp(beginCell.Color, rightCell.Color, i);
terrain.AddQuad(v1, v2, v3, v4);
terrain.AddQuadColor(c1, c2, c3, c4);
}
// The last step is a quad
terrain.AddQuad(v3, v4, left, right);
terrain.AddQuadColor(c3, c4, leftCell.Color, rightCell.Color);
}
/// <summary>
/// Handle corner triangle terraces
/// </summary>
/// <param name="begin">begin point of triangle</params>
/// <param name="beginCell">begin hex cell</param>
/// <param name="left">left point of triangle</param>
/// <param name="leftCell">left hex cell</param>
/// <param name="right">right point of triangle</param>
/// <param name="rightCell">right hex cell</param>
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);
}
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);
}
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 c3 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, 1);
Color c4 = HexMetrics.TerraceLerp(beginCell.Color, rightCell.Color, 1);
AddTriangle(begin, v3, v4);
AddTriangleColor(beginCell.Color, c3, c4);
for (int i = 2; i < HexMetrics.TerraceSteps; i++)
{
Vector3 v1 = v3;
Vector3 v2 = v4;
Color c1 = c3;
Color c2 = c4;
v3 = HexMetrics.TerraceLerp(begin, left, i);
v4 = HexMetrics.TerraceLerp(begin, right, i);
c3 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, i);
c4 = HexMetrics.TerraceLerp(beginCell.Color, rightCell.Color, i);
AddQuad(v1, v2, v3, v4);
AddQuadColor(c1, c2, c3, c4);
}
AddQuad(v3, v4, left, right);
AddQuadColor(c3, c4, leftCell.Color, rightCell.Color);
}
public static EdgeVertices TerraceLerp(EdgeVertices a, EdgeVertices b, int step)
{
EdgeVertices result;
result.v1 = HexMetrics.TerraceLerp(a.v1, b.v1, step);
result.v2 = HexMetrics.TerraceLerp(a.v2, b.v2, step);
result.v3 = HexMetrics.TerraceLerp(a.v3, b.v3, step);
result.v4 = HexMetrics.TerraceLerp(a.v4, b.v4, step);
result.v5 = HexMetrics.TerraceLerp(a.v5, b.v5, step);
return(result);
}
/// <summary>
/// Handle edge terraces
/// </summary>
/// <param name="begin">begin edge of slope trapezoid</param>
/// <param name="beginCell">begin hex cell</param>
/// <param name="end">end edge of slope trapezoid</param>
/// <param name="endCell">end hex cell</param>
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);
}
// Build a terrace between two cells
void TriangulateEdgeTerraces(EdgeVertices begin, HexCell beginCell, EdgeVertices end, HexCell endCell, bool hasRoad)
{
EdgeVertices e2 = EdgeVertices.TerraceLerp(begin, end, 1);
Color c2 = HexMetrics.TerraceLerp(beginCell.Color, endCell.Color, 1);
// The first step is a quad
TriangulateEdgeStrip(begin, beginCell.Color, e2, c2, hasRoad);
// All the steps are quads
for (int i = 2; i < HexMetrics.terraceSteps; i++)
{
EdgeVertices e1 = e2;
Color c1 = c2;
e2 = EdgeVertices.TerraceLerp(begin, end, i);
c2 = HexMetrics.TerraceLerp(beginCell.Color, endCell.Color, i);
TriangulateEdgeStrip(e1, c1, e2, c2, hasRoad);
}
// The last step is a quad
TriangulateEdgeStrip(e2, c2, end, endCell.Color, hasRoad);
}
void TriangulateBoundaryTriangle(Vector3 begin, HexCell beginCell, Vector3 left, HexCell leftCell, Vector3 boundary, Color boundaryColor)
{
Vector3 v2 = HexMetrics.TerraceLerp(begin, left, 1);
Color c2 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, 1);
AddTriangle(begin, v2, boundary);
AddTriangleColor(beginCell.Color, c2, boundaryColor);
for (int i = 2; i < HexMetrics.TerraceSteps; i++)
{
Vector3 v1 = v2;
Color c1 = c2;
v2 = HexMetrics.TerraceLerp(begin, left, i);
c2 = HexMetrics.TerraceLerp(beginCell.Color, leftCell.Color, i);
AddTriangle(v1, v2, boundary);
AddTriangleColor(c1, c2, boundaryColor);
}
AddTriangle(v2, left, boundary);
AddTriangleColor(c2, leftCell.Color, boundaryColor);
}
// 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);
}
