Add support for finishes (BRDFs).

2 files changed, 58 insertions, 0 deletions

diff --git a/libdimension/dimension/finishes.h b/libdimension/dimension/finishes.h
new file mode 100644
index 0000000..da18a6f
--- /dev/null
+++ b/libdimension/dimension/finishes.h
@@ -0,0 +1,31 @@
+/*************************************************************************
+ * Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com>               *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library is distributed in the hope that it will be      *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty   *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+/*
+ * Custom finishes.
+ */
+
+#ifndef DIMENSION_FINISHES_H
+#define DIMENSION_FINISHES_H
+
+/* A specular finish */
+dmnsn_finish *dmnsn_new_specular_finish();
+
+#endif /* DIMENSION_FINISHES_H */
diff --git a/libdimension/dimension/texture.h b/libdimension/dimension/texture.h
index c26e840..4d0e2d7 100644
--- a/libdimension/dimension/texture.h
+++ b/libdimension/dimension/texture.h
@@ -50,11 +50,38 @@ dmnsn_pigment *dmnsn_new_pigment();
 void dmnsn_delete_pigment(dmnsn_pigment *pigment);
 
 /*
+ * Finishes
+ */
+
+/* Forward-declare dmnsn_finish */
+typedef struct dmnsn_finish dmnsn_finish;
+
+/* Finish callback */
+typedef dmnsn_color dmnsn_finish_fn(const dmnsn_finish *finish,
+                                    dmnsn_color color, dmnsn_vector x0,
+                                    dmnsn_vector normal,
+                                    dmnsn_vector reflected);
+
+/* dmnsn_finish definition */
+struct dmnsn_finish {
+  /* Callbacks */
+  dmnsn_finish_fn *finish_fn;
+  dmnsn_free_fn *free_fn;
+
+  /* Generic pointer */
+  void *ptr;
+};
+
+dmnsn_finish *dmnsn_new_finish();
+void dmnsn_delete_finish(dmnsn_finish *finish);
+
+/*
  * A complete texture
  */
 
 typedef struct {
   dmnsn_pigment *pigment;
+  dmnsn_finish  *finish;
 } dmnsn_texture;
 
 dmnsn_texture *dmnsn_new_texture();