diff options
Diffstat (limited to 'src/modules/ray/ray_render_object_sphere.h')
-rw-r--r-- | src/modules/ray/ray_render_object_sphere.h | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/src/modules/ray/ray_render_object_sphere.h b/src/modules/ray/ray_render_object_sphere.h deleted file mode 100644 index addf1f5..0000000 --- a/src/modules/ray/ray_render_object_sphere.h +++ /dev/null @@ -1,90 +0,0 @@ -#ifndef _RAY_RENDER_OBJECT_SPHERE_H -#define _RAY_RENDER_OBJECT_SPHERE_H - -#include <math.h> - -#include "ray_3f.h" -#include "ray_camera.h" -#include "ray_color.h" -#include "ray_object_sphere.h" -#include "ray_object_type.h" -#include "ray_ray.h" -#include "ray_surface.h" - - -typedef struct ray_render_object_sphere_t { - ray_object_sphere_t object; - ray_3f_t primary_v; - float primary_dot_vv; - float r2; - float r_inv; -} ray_render_object_sphere_t; - - -static ray_render_object_sphere_t ray_render_object_sphere_prepare(const ray_object_sphere_t *sphere, const ray_camera_t *camera) -{ - ray_render_object_sphere_t prepared = { .object = *sphere }; - - prepared.primary_v = ray_3f_sub(&sphere->center, &camera->position); - prepared.primary_dot_vv = ray_3f_dot(&prepared.primary_v, &prepared.primary_v); - - prepared.r2 = sphere->radius * sphere->radius; - - /* to divide by radius via multiplication in ray_object_sphere_normal() */ - prepared.r_inv = 1.0f / sphere->radius; - - return prepared; -} - - -static inline int ray_render_object_sphere_intersects_ray(ray_render_object_sphere_t *sphere, unsigned depth, ray_ray_t *ray, float *res_distance) -{ - ray_3f_t v = sphere->primary_v; - float dot_vv = sphere->primary_dot_vv; - float b, disc; - - if (depth) { - v = ray_3f_sub(&sphere->object.center, &ray->origin); - dot_vv = ray_3f_dot(&v, &v); - } - - b = ray_3f_dot(&v, &ray->direction); - disc = sphere->r2 - (dot_vv - (b * b)); - if (disc > 0) { - float i1, i2; - - disc = sqrtf(disc); - - i1 = b - disc; - i2 = b + disc; - - if (i2 > 0 && i1 > 0) { - *res_distance = i1; - return 1; - } - } - - return 0; -} - - -/* return the normal of the surface at the specified point */ -static inline ray_3f_t ray_render_object_sphere_normal(ray_render_object_sphere_t *sphere, ray_3f_t *point) -{ - ray_3f_t normal; - - normal = ray_3f_sub(point, &sphere->object.center); - normal = ray_3f_mult_scalar(&normal, sphere->r_inv); /* normalize without the sqrt() */ - - return normal; -} - - -/* return the surface of the sphere @ point */ -static inline ray_surface_t ray_render_object_sphere_surface(ray_render_object_sphere_t *sphere, ray_3f_t *point) -{ - /* uniform solids for now... */ - return sphere->object.surface; -} - -#endif |