static void CalculateTangentForFace(VertexInfo[] vertices, RangeI indexRange, Vector3F[] tangents, Vector3F[] bitangents, GetTextureCoord getTextureCoord = null)
{
// triangle or polygon... we always use only the first three indices. A polygon
// is supposed to be planar anyways....
if (indexRange.Size < 3)
{
for (int i = indexRange.Minimum; i < indexRange.Maximum; i++)
{
tangents[i] = new Vector3F(float.NaN, float.NaN, float.NaN);
bitangents[i] = new Vector3F(float.NaN, float.NaN, float.NaN);
}
FbxImportLog.LogWarning("To calculate the tangents a polygon must have > 2 vertices");
return;
}
ref StandardVertex pt0 = ref vertices[indexRange.Minimum].Vertex;
/// <summary>
/// Requirements : normals and UV coordinates must be present.
/// </summary>
/// <param name="vertices"></param>
/// <param name="tangents"></param>
/// <param name="bitangents"></param>
/// <param name="getTextureCoord">if null then texCoord0 is used, if not null this delegete than takes the necessary texCoord</param>
public static void CalculateTangents(VertexInfo[] vertices, out Vector3F[] tangents, out Vector3F[] bitangents, GetTextureCoord getTextureCoord = null)
{
tangents = new Vector3F[vertices.Length];
bitangents = new Vector3F[vertices.Length];
if (vertices.Length == 0)
{
return;
}
foreach (var polygonIndexRange in CalcMiscProcess.EnumeratePolygons(vertices))
{
CalculateTangentForFace(vertices, polygonIndexRange, tangents, bitangents, getTextureCoord);
}
//SmoothTangents( vertices, tangents, bitangents, FbxMath.ComputePositionEpsilon( vertices ), maxSmoothingAngleInRadians );
}
