test_uvsphere.cc

// simple_raytrace.cc

#include <iostream>
#include "vector3.h"
#include "rgb.h"
#include "image.h"
#include "shape.h"
#include "uvsphere.h"
#include "marble_texture.h"
#include "wood_texture.h"
using namespace std;

int main() {
    HitRecord rec;
    bool is_a_hit;
    float tmax;
    // negative z so we can use right-handed coords
    Vector3 dir(0,0,-1); // direction of viewing rays

    //generate Texture
//    Texture *tex = new MarbleTexture(0.001f, 5.0f, 8);
      Texture *tex = new WoodTexture(0.0015f, 10);

    // scene geometry
    UVSphere sphere(Vector3(750,750,-1000), 500, tex);
    Image im(1500, 1500);

    // loop over pixels
    for (int i = 0; i < 1500; i++)
        for (int j = 0; j < 1500; j++) {
            tmax = 100000.0f;
            is_a_hit = false;
            Ray r(Vector3(i,j,0), dir);

            if (sphere.hit(r, .00001f, tmax, 0.0f, rec)) {
                tmax = rec.t;
                is_a_hit = true;
            }
            if (is_a_hit) {
                rgb color = tex->value(rec.uv, rec.hit_p);
                im.set(i, j, color);
            }
      //      else if(sphere.shadowHit(r, .00001f, tmax, 0.0f))
        //        im.set(i,j,rgb(.0, .0, .0));
            else 
                im.set(i, j, rgb(.2, .2, .2));
        }
    im.writePPM(cout);
}