/// <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);
}