Add transformations to textures and pigments.

Also, object intersection callbacks are now responsible for handling their own
transformations.

2 files changed, 15 insertions, 0 deletions

diff --git a/libdimension/dimension/object.h b/libdimension/dimension/object.h
index f0395cd..1d5f580 100644
--- a/libdimension/dimension/object.h
+++ b/libdimension/dimension/object.h
@@ -41,6 +41,8 @@ typedef struct dmnsn_intersection {
   const dmnsn_interior *interior;
 } dmnsn_intersection;
 
+dmnsn_vector dmnsn_matrix_normal_mul(dmnsn_matrix trans, dmnsn_vector normal);
+
 /* Forward-declare dmnsn_object */
 typedef struct dmnsn_object dmnsn_object;
 
@@ -80,4 +82,6 @@ dmnsn_object *dmnsn_new_object();
 /* Free an object */
 void dmnsn_delete_object(dmnsn_object *object);
 
+void dmnsn_object_precompute(dmnsn_object *object);
+
 #endif /* DIMENSION_OBJECT_H */
diff --git a/libdimension/dimension/texture.h b/libdimension/dimension/texture.h
index 70cfdc5..91dda23 100644
--- a/libdimension/dimension/texture.h
+++ b/libdimension/dimension/texture.h
@@ -42,6 +42,9 @@ struct dmnsn_pigment {
   dmnsn_pigment_fn *pigment_fn;
   dmnsn_free_fn *free_fn;
 
+  /* Transformation matrix */
+  dmnsn_matrix trans, trans_inv;
+
   /* Generic pointer */
   void *ptr;
 };
@@ -49,6 +52,8 @@ struct dmnsn_pigment {
 dmnsn_pigment *dmnsn_new_pigment();
 void dmnsn_delete_pigment(dmnsn_pigment *pigment);
 
+void dmnsn_pigment_precompute(dmnsn_pigment *pigment);
+
 /*
  * Finishes
  */
@@ -91,11 +96,17 @@ void dmnsn_delete_finish(dmnsn_finish *finish);
  */
 
 typedef struct {
+  /* Texture components */
   dmnsn_pigment *pigment;
   dmnsn_finish  *finish;
+
+  /* Transformation matrix */
+  dmnsn_matrix trans, trans_inv;
 } dmnsn_texture;
 
 dmnsn_texture *dmnsn_new_texture();
 void dmnsn_delete_texture(dmnsn_texture *texture);
 
+void dmnsn_texture_precompute(dmnsn_texture *texture);
+
 #endif /* DIMENSION_TEXTURE_H */