Hi,
    I' ve already tried this way, but the method of the class Intersect,
doesn't
seem to work very well. When I call the method, for instance,
rayAndQuad,  it
needs an array of  Point3d (the coordinate of the vertex of the
QuadArray). The
method I used to retrive information about the vertex  is
QuadArray.getCoordinates(int,Point3f/Point3d). When I try, java rise a 
Null Pointer Exception. Why? Is a bug or is my inexperience with java?

Regards.

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