/// <summary>
/// Do Loop subdivision of the input control triangle mesh.
/// </summary>
/// <param name="scene">Input scene (must not be changed).</param>
/// <param name="epsilon">Reference error toleration (size of undivided triangle).</param>
/// <param name="normals">Generate normals? (optional)</param>
/// <param name="colors">Generate colors? (optional)</param>
/// <param name="txtcoord">Generate texture coordinates? (optional)</param>
/// <param name="time">Current time for animation (optional)</param>
/// <param name="param">Optional additional parameters.</param>
/// <returns>Number of generated points.</returns>
public int Subdivide(SceneBrep scene, float epsilon, bool normals, bool colors, bool txtcoord, float time, string param)
{
result = scene.Clone();
// !!!{{ TODO: put your Loop subdivision code here
// pilot: do one (trivial) division
int triangles = result.Triangles;
int tr;
for (tr = 0; tr < triangles; tr++)
{
int A, B, C;
result.GetTriangleVertices(tr, out A, out B, out C);
Vector3 vA = result.GetVertex(A);
Vector3 vB = result.GetVertex(B);
Vector3 vC = result.GetVertex(C);
Vector3 vA2 = (vB + vC) * 0.5f;
Vector3 vB2 = (vA + vC) * 0.5f;
Vector3 vC2 = (vA + vB) * 0.5f;
int A2 = result.AddVertex(vA2);
int B2 = result.AddVertex(vB2);
int C2 = result.AddVertex(vC2);
result.AddTriangle(B2, C2, A2);
result.AddTriangle(B2, A2, C);
result.AddTriangle(C2, B, A2);
result.SetTriangleVertices(tr, A, C2, B2);
}
//result.BuildCornerTable();
return(result.Vertices);
// !!!}}
}