public Color lookup(ShadingState state, IShader shader)
{
if (state.getNormal() == null)
{
return(null);
}
// search further
for (Sample s = first; s != null; s = s.next)
{
if (s.i != state.getInstance())
{
continue;
}
if (s.s != shader)
{
continue;
}
if (state.getRay().dot(s.dx, s.dy, s.dz) < 0.999f)
{
continue;
}
if (state.getNormal().dot(s.nx, s.ny, s.nz) < 0.99f)
{
continue;
}
// we have a match
hits++;
return(s.c);
}
misses++;
return(null);
}
public void add(ShadingState state, IShader shader, Color c)
{
if (state.getNormal() == null)
{
return;
}
depth++;
Sample s = new Sample();
s.i = state.getInstance();
s.s = shader;
s.c = c;
s.dx = state.getRay().dx;
s.dy = state.getRay().dy;
s.dz = state.getRay().dz;
s.nx = state.getNormal().x;
s.ny = state.getNormal().y;
s.nz = state.getNormal().z;
s.next = first;
first = s;
}