RE: Solid Textures (Perlin Noise)
Hi all,
Over the last month or so I have been working hard (kind of) and in my own time on a ray tracer based upon the MIT OCW.
I am up to implementing Perlin noise (aka solid texturing). Alas, I have no idea how to use Ken's code (noisemachine etc...).
Here was my attempt, but all I get to see are black cubes:
class NoiseMaterial : public Material
{
public:
NoiseMaterial(Matrix m, Material* m1, Material* m2, int oct) : matrix(m), material1(m1), material2(m2), octaves(oct)
{
}
vector3f Shade(const Ray& ray, const Hit& hit, const vector3f& direction_to_light, const vector3f& light_color) const
{
vector3f t = hit.GetIntersectionPoint();
matrix.Transform(t);
float noise = 0.0f;
for (int i = 1, j = 1; i < octaves; ++i, j = 2 * j)
{
noise = noise + Perlin::noise(t[x] * j, t[y] * j, t[z] * j) / j;
}
vector3f shade = ((0.0f + noise) * material1->Shade(ray, hit, direction_to_light, light_color)) + ((1.0f - noise) * material2->Shade(ray, hit, direction_to_light, light_color));
return shade.Clamp();
}
protected:
Matrix matrix;
Material* material1, * material2;
int octaves;
private:
};
How would I produce marble cubes like this. I first just want to the produce the green one (lower left) and then extend it to get the marble look and feel...
Web Reference: http://groups.csail.mit.edu/graphics/classes/6.837/F04/assignments/assignment6/
Any ideas, help????
Thanks in advance!!!
