multithreaded render

[cyberay] / src / level.c

diff --git a/src/level.c b/src/level.c
index 1bd1c19..fcdc405 100644 (file)
--- a/src/level.c
+++ b/src/level.c
@@ -86,6 +86,29 @@ void destroy_level(struct level *lvl)
 
 int ray_level(cgm_ray *ray, struct level *lvl, float tmax, struct rayhit *hit)
 {
+       int found = 0;
+       struct rayhit hit0;
+
+       if(!hit) {
+               if(ray_bvhnode(ray, lvl->st_root, tmax, 0)) return 1;
+               if(ray_bvhnode(ray, lvl->dyn_root, tmax, 0)) return 1;
+               return 0;
+       }
+
+       hit0.t = FLT_MAX;
+       if(ray_bvhnode(ray, lvl->st_root, tmax, hit)) {
+               hit0 = *hit;
+               found = 1;
+       }
+       if(ray_bvhnode(ray, lvl->dyn_root, tmax, hit) && hit->t < hit0.t) {
+               hit0 = *hit;
+               found = 1;
+       }
+
+       if(found) {
+               *hit = hit0;
+               return 1;
+       }
        return 0;
 }