diff options
Diffstat (limited to 'scene.c')
| -rw-r--r-- | scene.c | 5 |
1 files changed, 3 insertions, 2 deletions
@@ -116,7 +116,7 @@ material_t *add_material(container_t *cont) return m; } -void obj_norm_at(object_t *o, vector_t *dest, vector_t *point) +void obj_norm_at(object_t *o, vector_t *dest, vector_t *point, vector_t *direction) { switch(o->type) { case TYPE_SPHERE: @@ -124,7 +124,8 @@ void obj_norm_at(object_t *o, vector_t *dest, vector_t *point) vector_scale_inv(dest, dest, vector_len(dest)); break; case TYPE_PLANE: - vector_copy(dest, &o->pl.norm); + // Calculate if the point is in front + vector_scale(dest, &o->pl.norm, (vector_dot(direction, &o->pl.norm) > 0) ? -1 : 1); break; } |