I have an object and a light. I want to create an attribute on the points of my object that are directly illuminated by my light. 1 when the point is illuminated, 0 when it's not. For now I have this :
4@m = optransform('/obj/hlight1');
vector lightDirection = set(0, 0, 1) * 4@m;
float result = dot(- lightDirection, @N); result = fit(result, 0.99, 1, 0, 1);
@Cd = set(result, result, result);
The problem is that I get a value on my result even when the goal of my spotlight isn't in the direction of my object. In fact, it only takes care of my light's center. I want it to take care of my light direction but I can't find where to get the goal or target parameters (tx,ty,tz). Can you help me guys ?
The lighting equation is a little different than that. You need to take into account the light's position as well as it's direction. Check out my scene file.
key: pos = surface position nn = surface normal lpos = light position lz = light z axis ldir = direction from surface to light
