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What XSI|ICE "Project a vector" equivalent on VOPS?

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In VOPs it would be a combination of the Intersect VOP to fire the ray, then the Distance VOP to compute the distance between the origin point of the ray and the Intersect VOP's output "pos". Intersect will return -1 as the "prim" output if an actual primitive isn't hit, so you could use that as your "VALID" output.

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