From 70379f85feb3b294742d880a75fabd4452c5ecf3 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Wed, 25 Nov 2009 02:38:41 -0500
Subject: Support scaling and translation transformations.

---
 dimension/realize.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'dimension/realize.c')

diff --git a/dimension/realize.c b/dimension/realize.c
index 2c5bd81..3b1d327 100644
--- a/dimension/realize.c
+++ b/dimension/realize.c
@@ -86,6 +86,31 @@ dmnsn_realize_rotation(dmnsn_astnode astnode, dmnsn_object *object)
   return object;
 }
 
+static dmnsn_object *
+dmnsn_realize_scale(dmnsn_astnode astnode, dmnsn_object *object)
+{
+  dmnsn_astnode scale_node;
+  dmnsn_array_get(astnode.children, 0, &scale_node);
+  dmnsn_vector scale = dmnsn_realize_vector(scale_node);
+
+  object->trans = dmnsn_matrix_mul(dmnsn_scale_matrix(scale), object->trans);
+  return object;
+}
+
+static dmnsn_object *
+dmnsn_realize_translation(dmnsn_astnode astnode, dmnsn_object *object)
+{
+  dmnsn_astnode trans_node;
+  dmnsn_array_get(astnode.children, 0, &trans_node);
+  dmnsn_vector trans = dmnsn_realize_vector(trans_node);
+
+  object->trans = dmnsn_matrix_mul(
+    dmnsn_translation_matrix(trans),
+    object->trans
+  );
+  return object;
+}
+
 static dmnsn_object *
 dmnsn_realize_object_modifiers(dmnsn_astnode astnode, dmnsn_object *object)
 {
@@ -98,6 +123,12 @@ dmnsn_realize_object_modifiers(dmnsn_astnode astnode, dmnsn_object *object)
     case DMNSN_AST_ROTATION:
       object = dmnsn_realize_rotation(modifier, object);
       break;
+    case DMNSN_AST_SCALE:
+      object = dmnsn_realize_scale(modifier, object);
+      break;
+    case DMNSN_AST_TRANSLATION:
+      object = dmnsn_realize_translation(modifier, object);
+      break;
 
     default:
       dmnsn_error(DMNSN_SEVERITY_HIGH, "Invalid object modifier.");
-- 
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