diff options
Diffstat (limited to 'libdimension/raytrace.c')
| -rw-r--r-- | libdimension/raytrace.c | 46 |
1 files changed, 33 insertions, 13 deletions
diff --git a/libdimension/raytrace.c b/libdimension/raytrace.c index 10f400d..c9217ca 100644 --- a/libdimension/raytrace.c +++ b/libdimension/raytrace.c @@ -185,7 +185,7 @@ dmnsn_raytrace_scene_multithread_thread(void *ptr) /* Helper for dmnsn_raytrace_scene_impl - shoot a ray */ static dmnsn_color dmnsn_raytrace_shoot(dmnsn_scene *scene, dmnsn_color color, - unsigned int x, unsigned int y); + dmnsn_line ray); /* * Actually raytrace a scene @@ -196,6 +196,7 @@ dmnsn_raytrace_scene_impl(dmnsn_progress *progress, dmnsn_scene *scene, { unsigned int x, y; unsigned int width, height; + dmnsn_line ray; dmnsn_color color; width = scene->canvas->x; @@ -211,7 +212,10 @@ dmnsn_raytrace_scene_impl(dmnsn_progress *progress, dmnsn_scene *scene, color = scene->background; if (scene->quality >= DMNSN_RENDER_OBJECTS) { - color = dmnsn_raytrace_shoot(scene, color, x, y); + /* Get the ray corresponding to the (x,y)'th pixel */ + ray = (*scene->camera->ray_fn)(scene->camera, scene->canvas, x, y); + /* Shoot a ray */ + color = dmnsn_raytrace_shoot(scene, color, ray); } dmnsn_set_pixel(scene->canvas, x, y, color); @@ -225,17 +229,13 @@ dmnsn_raytrace_scene_impl(dmnsn_progress *progress, dmnsn_scene *scene, /* Shoot a ray, and calculate the color, using `color' as the background */ static dmnsn_color -dmnsn_raytrace_shoot(dmnsn_scene *scene, dmnsn_color color, - unsigned int x, unsigned int y) +dmnsn_raytrace_shoot(dmnsn_scene *scene, dmnsn_color color, dmnsn_line ray) { - dmnsn_line ray, ray_trans; + dmnsn_line ray_trans; dmnsn_object *object; - dmnsn_intersection *intersection; + dmnsn_intersection *intersection = NULL, *intersection_temp; unsigned int i; - /* Get the ray corresponding to the (x,y)'th pixel */ - ray = (*scene->camera->ray_fn)(scene->camera, scene->canvas, x, y); - for (i = 0; i < dmnsn_array_size(scene->objects); ++i) { dmnsn_array_get(scene->objects, i, &object); @@ -243,13 +243,33 @@ dmnsn_raytrace_shoot(dmnsn_scene *scene, dmnsn_color color, ray_trans = dmnsn_matrix_line_mul(object->trans, ray); /* Test for intersections with objects */ - intersection = (*object->intersection_fn)(object, ray_trans); + intersection_temp = (*object->intersection_fn)(object, ray_trans); + + if (intersection_temp && + (!intersection || intersection_temp->t < intersection->t)) { + dmnsn_delete_intersection(intersection); + intersection = intersection_temp; + } + } - if (intersection) { - color = dmnsn_color_from_XYZ(dmnsn_whitepoint); + if (intersection) { + if (scene->quality >= DMNSN_RENDER_PIGMENT) { + if (intersection->texture) { + if (intersection->texture->pigment) { + color = (*intersection->texture->pigment->pigment_fn)( + intersection->texture->pigment, + dmnsn_line_point(intersection->ray, intersection->t) + ); + } else { + color = dmnsn_black; + } + } else { + color = dmnsn_black; + } + } else { + color = dmnsn_white; } - /* Delete the intersection */ dmnsn_delete_intersection(intersection); } |