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Change how rays are generated -- parallel to Z axis

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Eryn Wells 2013-09-08 12:09:02 -07:00
parent 4407f757e6
commit 2417176f0c
1 changed files with 4 additions and 12 deletions
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16
src/scene.c
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@ -89,22 +89,14 @@ scene_render(Scene *scene)
scene->width = 640; scene->width = 640;
scene->height = 480; scene->height = 480;
float fov = 30.0;
float aspect_ratio = scene->width / scene->height;
float angle = tan(M_PI * 0.5 * fov / 180.0);
float xx, yy;
Ray primary_ray; Ray primary_ray;
Vector3 direction; Vector3 location, direction;
for (int y = 0; y < scene->height; y++) { for (int y = 0; y < scene->height; y++) {
for (int x = 0; x < scene->width; x++) { for (int x = 0; x < scene->width; x++) {
// Compute (x, y) of ray direction.
xx = (2 * ((x + 0.5) / scene->width) - 1) * angle * aspect_ratio;
yy = (1 - 2 * ((y + 0.5) / scene->height)) * angle;
// Assemble a ray and trace it. // Assemble a ray and trace it.
direction = vector_init(xx, yy, 1); location = vector_init(x, y, -1000);
primary_ray = ray_init(ZeroVector3, vector_normalize(direction)); direction = vector_init(0, 0, 1);
primary_ray = ray_init(location, vector_normalize(direction));
scene->pixels[y * scene->height + x] = scene_trace_ray(scene, primary_ray, 0); scene->pixels[y * scene->height + x] = scene_trace_ray(scene, primary_ray, 0);
} }
} }