int samples = 30;
string lightOP = “../../arealight1”;
matrix lightmat = optransform(lightOP);


for(int s=0; s < samples; s++) {
vector lightCd = chv(lightOP + “/light_color”);


vector sampleP = random(@ptnum, s*123);
sampleP = fit01(sampleP, {-0.5,-0.5,0}, {0.5,0.5,0});


vector lightP = sampleP * lightmat;


vector lightray = lightP - v@P;
vector offset = v@N*0.001;
vector lP, luv;
float lightvis = (intersect(0, v@P+offset, lightray, lP, luv) == -1);
f@lightvis = lightvis;



float geoterm = clamp(dot(v@N, normalize(lightray)), 0, 1);

v@Cd += lightCd * lightvis * geoterm;
}
v@Cd = v@Cd / float(samples);


//END

It's a simple for loop, but I'm still new to opencl, can someone help? thanks

I don't think you can without making your own ray-tracing solution. There is no ‘intersect’ function built-in to openCL.

jsmack
I don't think you can without making your own ray-tracing solution. There is no ‘intersect’ function built-in to openCL.

Oh didn't know though, I intuitively thought whatever is available to VEX is also available to openCL

ouroboros1221
I intuitively thought whatever is available to VEX is also available to openCL

No, I guess it´s quite the opposite.

Please someone prove me wrong, but as far as I know:

1. No VEX function at all is available in OpenCL.
   
2. OpenCL does not come with comparable functions, either.
   
3. You have to create all necessary attributes beforehand.
   
4. All you can do is manipulate existing attributes.
   
5. Everything has to be solved purely mathematically.
   
6. You cannot delete or create geometry right away.