Add precompute callback to objects.

1 files changed, 10 insertions, 4 deletions

diff --git a/libdimension/object.c b/libdimension/object.c
index 9074d60..acc0163 100644
--- a/libdimension/object.c
+++ b/libdimension/object.c
@@ -37,10 +37,11 @@ dmnsn_object *
 dmnsn_new_object()
 {
   dmnsn_object *object = dmnsn_malloc(sizeof(dmnsn_object));
-  object->texture  = NULL;
-  object->interior = NULL;
-  object->trans    = dmnsn_identity_matrix();
-  object->free_fn  = NULL;
+  object->texture       = NULL;
+  object->interior      = NULL;
+  object->trans         = dmnsn_identity_matrix();
+  object->precompute_fn = NULL;
+  object->free_fn       = NULL;
   return object;
 }
 
@@ -62,9 +63,14 @@ dmnsn_delete_object(dmnsn_object *object)
 void
 dmnsn_object_precompute(dmnsn_object *object)
 {
+  if (object->precompute_fn) {
+    (*object->precompute_fn)(object);
+  }
+
   object->bounding_box
     = dmnsn_transform_bounding_box(object->trans, object->bounding_box);
   object->trans_inv = dmnsn_matrix_inverse(object->trans);
+
   if (object->texture) {
     object->texture->trans
       = dmnsn_matrix_mul(object->trans, object->texture->trans);