Mesh.IntersectSubset Method ()

Intersects the specified ray with a given mesh subset.

Overload List

public bool IntersectSubset(int, Vector3, Vector3);

public bool IntersectSubset(int, Vector3, Vector3, out IntersectInformation);

public bool IntersectSubset(int, Vector3, Vector3, out IntersectInformation, out IntersectInformation);

public bool IntersectSubset(int, Vector3, Vector3, out IntersectInformation);

Remarks

This method provides functionality that is similar to that of Intersect.

The IntersectSubset method provides a way to understand points in and around a triangle, independent of where the triangle is actually located. This method returns the resulting point by using the following equation:

V1 + U(V2-V1) + V(V3-V1)

Any point in the plane V1V2V3 can be represented by the barycentric coordinate (U,V). The U parameter controls how much V2 gets weighted into the result, and the V parameter controls how much V3 gets weighted into the result. Lastly, 1-U-V controls how much V1 gets weighted into the result.

Barycentric coordinates are a form of general coordinates. In this context, using them represents a change in coordinate systems. What holds true for Cartesian coordinates also holds true for barycentric coordinates.

Exceptions

InvalidCallException

The method call is invalid. For example, a method's parameter might contain an invalid value.

OutOfMemoryException

Microsoft Direct3D could not allocate sufficient memory to complete the call.