Hello,
"I also tested the IntersectionUtils from org.j3d.geom. They seemed
faster, but instead I have problems getting them to work correctly."
I used IntersectionUtils class sucessfully in my app, so perhaps I can help you.
What sort of geometry is used for your shape3D ? (trianglearray, trianglestriparray, ...)
In my case, I added a method in IntersectionUtils class who computes intersection with a triangle
and I make some tests with a subset of triangles containing the point of intersection with the ray and the shape
________________________________________________________________________
Roger Berggren <[EMAIL PROTECTED]> wrote:
Hi,
I'm trying to find the closest intersection point between the mouse
position and a huge (700, 000 vertices) Shape3D.
What is the best approach to try to find the closest intersection
point as fast as possible.
I have tried the com.sun.j3d.utils.picking classes, but for this size
they seem a bit slow, but they find the local coordinates correctly.
I also tested the IntersectionUtils from org.j3d.geom. They seemed
faster, but instead I have problems getting them to work correctly.
So I have one that's slow but correct and one that's fast but
not working :-)
How do one best organize the scenegraph with such a large
Shape3D for best picking performance?
Do you have 70 Shape3Ds with 10000 vertices or
1 Shape3D with 70 geometries or a single GeometryArray?
Any ideas, thoughts or examples are greatly appricated.
Best Regards,
Roger Berggren
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