/// <summary>
/// Handle corner triangle terraces(slope-cliff cases)
/// </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 TriangulateCornerTerracesCliff(Vector3 begin, HexCell beginCell, Vector3 left, HexCell leftCell, Vector3 right, HexCell rightCell)
{
float b = 1f / (rightCell.Elevation - beginCell.Elevation);
if (b < 0)
{
b = -b;
}
Vector3 boundary = Vector3.Lerp(HexMetrics.Perturb(begin), HexMetrics.Perturb(right), b);
Color boundaryWeights = Color.Lerp(weights1, weights3, b);
Vector3 indices;
indices.x = beginCell.Index;
indices.y = leftCell.Index;
indices.z = rightCell.Index;
TriangulateBoundaryTriangle(begin, weights1, left, weights2, boundary, boundaryWeights, indices);
if (leftCell.GetEdgeType(rightCell) == HexEdgeType.Slope)
{
TriangulateBoundaryTriangle(left, weights2, right, weights3, boundary, boundaryWeights, indices);
}
else
{
terrain.AddTriangleUnperturbed(HexMetrics.Perturb(left), HexMetrics.Perturb(right), boundary);
terrain.AddTriangleCellData(indices, weights2, weights3, boundaryWeights);
}
}
private void AddWallWedge(Vector3 near, Vector3 far, Vector3 point)
{
near = HexMetrics.Perturb(near);
far = HexMetrics.Perturb(far);
point = HexMetrics.Perturb(point);
Vector3 center = HexMetrics.WallLerp(near, far);
Vector3 thickness = HexMetrics.WallThicknessOffset(near, far);
Vector3 v1, v2, v3, v4;
Vector3 pointTop = point;
point.y = center.y;
v1 = v3 = center - thickness;
v2 = v4 = center + thickness;
v3.y = v4.y = pointTop.y = center.y + HexMetrics.wallHeight;
walls.AddQuadUnperturbed(v1, point, v3, pointTop);
walls.AddQuadUnperturbed(point, v2, pointTop, v4);
walls.AddTriangleUnperturbed(pointTop, v3, v4);
}