diff options
Diffstat (limited to 'ray.c')
| -rw-r--r-- | ray.c | 54 |
1 files changed, 28 insertions, 26 deletions
@@ -28,33 +28,35 @@ typedef struct { } Light; static unsigned char buffer[BUFFER_SIZE]; -static Object objects[2] = {{.position={0, 0, -2}, .radius=1, .diffuse={0, 0, .3}}, - {.position={0, 0, -3}, .radius=1, .diffuse={0, 0, .3}}}; -//static Light lights[1] = {{.position={1, 0, 0}, .diffuse={0, 0, .3}}}; +static Object objects[] = {{.position={-1.414, -1, -3}, .radius=1, .diffuse={.8, 0, .8}}, + {.position={0, 1, -5}, .radius=1, .diffuse={0, .8, .8}}, + {.position={1.414, -1, -3}, .radius=1, .diffuse={.8, .8, 0}}}; +static Light lights[] = {{.position={-3, 3, -4}, .diffuse={0, .6, .6}}, + {.position={0, 30, -4}, .diffuse={1, 1, 1}}}; static void -trace(float s[3], float d[3], float pixel[3]) { - int i; - float intensity, l[3], r[3], t, y[3]; - - if(d[1] < 0) { - if((int)(d[0] / d[1] * 20) % 2) - pixel[0] += .1; - - if((int)(d[1] / d[0] * 20) % 2) - pixel[1] += .1; +trace(float s[3], float d[3], float pixel[3], int n) { + int i, j, k, m; + float l[3], r[3], t, y[3]; + + for(j = 0; j < LENGTH(objects); ++j) { + t = sphere_intersect(y, r, s, d, objects[j].position, objects[j].radius); + + if(t > 0) { + for(m = 0; m < LENGTH(lights); ++m) { + for(i = 0; i < 3; ++i) + l[i] = lights[m].position[i] - y[i]; + + normalize(l); + for(k = 0; k < 3; ++k) + pixel[k] += lights[m].diffuse[k] * objects[j].diffuse[k] * (MAX(dot(l, r), 0)) / (1 << n); + + trace(y, r, pixel, n + 1); + } + } else { + continue; + } } - - l[0] = -1; - l[1] = 1; - l[2] = 1; - - normalize(l); - - t = sphere_intersect(y, r, s, d, objects[0].position, objects[0].radius); - - //if(t > 0) - //pixel[2] = dot(l, r); } static void @@ -78,7 +80,7 @@ display(void) { normalize(d); memset(pixel, '\0', sizeof(pixel)); - trace(s, d, pixel); + trace(s, d, pixel, 1); for(j = 0; j < 3; ++j) buffer[i + j] = MIN(255 * pixel[j], 255); @@ -96,7 +98,7 @@ reshape(int w, int h) { static void keyboard(unsigned char key, int x, int y) { - if (key == 27) + if(key == 27) exit(0); } |