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Showing results for tags 'collision point'.
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Basically I'm trying to create a DA that I can select a particular object and be able to control where the specular/reflect appears on the surface with respect to the camera. I know I need to calculate the reflection angle with reference to the normal of the surface and the camera - but I want to be able to animate the point on the surface so I can control the position of the specular over time. So essentially it should be a null that I could move across the surface of the object and at the angle of reflection I'd have a light which would cause the specular (which would move accordingly if the null is moved). Sorry, does this make sense? I've been scratching my brain with this all day as I know logically how to build it - I just can't figure out the best way to do it in houdini... yet (I'm going to keep trying but wanted to see if any one had any tips/ideas). Cheers
