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"Micheal \(Mike\) Williams" <mic### [at] quixnet net> wrote:
> I have been toying with an idea. All objects in real life have a thickness
> to them. The metal of a car is thick enough that we can see it rounded at
> the edges. The idea is to treat triangles as though they have a thickness.
Why? What would be the advantage of this?
> The ray is incremented at a constant value. The triangle strike
> point might just lay between he ray steps.
No, in raytracing rays are not incremented by steps (that would be
awfully slow anyways).
The intersection of a ray with a surface is calculated mathematically.
For example, when you want to get the intersection of a ray and a sphere
you take the function of a line representing the ray and the function
of the spherical surface, make them equal and solve where they get the
same value. See http://povray.org/documentation/view/116/ for an
example implementation of this.
--
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -
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