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On Mon, 12 Nov 2001 19:10:25 -0500, "Mahalis" <don### [at] fakey com> wrote:
> Could anyone explain to me exactly how one uses the trace() function to
> detect object collisions? The docs say that 'trace() can be used to detect
> the exact point a ray intersects a surface' and then gives a perfectly
> incomprehensible (to me at least) example.
You are talking about 3.5, right? Check trace.pov and trace2.pov in
POV3.5/scenes/language/ directory.
ABX
--
#declare _=function(a,b,x){((a^2)+(b^2))^.5-x}#default {pigment{color rgb 1}}
union{plane{y,-3}plane{-x,-3}finish{reflection 1 ambient 0}}isosurface{ //ABX
function{_(x-2,y,1)|_((x+y)*.7,z,.1)|_((x+y+2)*.7,z,.1)|_(x/2+y*.8+1.5,z,.1)}
contained_by{box{<0,-3,-.1>,<3,0,.1>}}translate z*15finish{ambient 1}}//POV35
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