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CastleTriangles
type T3DTriangleGeometry = record
Triangle expressed in particular coordinate system, for T3DTriangle.
Triangle: TTriangle3Single;
Area: Single;
Plane: TVector4Single;
Normal: TVector3Single;
Area of the triangle. In other words, just a precalculated for you TriangleArea(Triangle).
This is a calculated TriangleNormPlane(Triangle), that is a 3D plane containing our Triangle, with normalized direction vector.