From b50c4de1bca23c2068819b9b1f492f934bfe9dcd Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Thu, 5 Mar 2009 20:04:13 +0000
Subject: [PATCH] added parser, nodes, Scene-load support for transparency in
 materials

git-svn-id: svn://anubis/fart/trunk@186 7f9b0f55-74a9-4bce-be96-3c2cd072584d
---
 main/Scene-load.cc | 4 ++++
 parser/nodes.h     | 6 ++++++
 parser/parser.lex  | 1 +
 parser/parser.yy   | 4 ++++
 4 files changed, 15 insertions(+)

diff --git a/main/Scene-load.cc b/main/Scene-load.cc
index 48f9c73..e068100 100644
--- a/main/Scene-load.cc
+++ b/main/Scene-load.cc
@@ -250,6 +250,10 @@ refptr<Material> Scene::processMaterial(refptr<Node> node)
         {
             material->setShininess((*it)->getNumber());
         }
+        else if ( typeid(**it) == typeid(TransparencyNode) )
+        {
+            material->setTransparency((*it)->getNumber());
+        }
     }
 
     return material;
diff --git a/parser/nodes.h b/parser/nodes.h
index 12b9ea6..418bd99 100644
--- a/parser/nodes.h
+++ b/parser/nodes.h
@@ -284,6 +284,12 @@ class TranslateBlockNode : public TranslateNode
         TranslateBlockNode(refptr<Vector> vector) : TranslateNode(vector) {}
 };
 
+class TransparencyNode : public NumberNode
+{
+    public:
+        TransparencyNode(double d) : NumberNode(d) {}
+};
+
 class UnionNode : public Node
 {
     public:
diff --git a/parser/parser.lex b/parser/parser.lex
index 9a57e1d..37a2f6d 100644
--- a/parser/parser.lex
+++ b/parser/parser.lex
@@ -66,6 +66,7 @@ specular            return SPECULAR;
 sphere              return SPHERE;
 subtract            return SUBTRACT;
 translate           return TRANSLATE;
+transparency        return TRANSPARENCY;
 union               return UNION;
 up                  return UP;
 vfov                return VFOV;
diff --git a/parser/parser.yy b/parser/parser.yy
index 826ac51..a134125 100644
--- a/parser/parser.yy
+++ b/parser/parser.yy
@@ -85,6 +85,7 @@ static refptr<Node> parsed_scene_node;
 %token SPHERE;
 %token SUBTRACT;
 %token TRANSLATE;
+%token TRANSPARENCY;
 %token UNION;
 %token UP;
 %token VFOV;
@@ -237,6 +238,9 @@ material_item: COLOR vector {
              | SHININESS number {
                     $$ = new ShininessNode($2->getNumber());
                 }
+             | TRANSPARENCY number {
+                    $$ = new TransparencyNode($2->getNumber());
+                }
              ;
 
 material_definition: DEFINE MATERIAL IDENTIFIER LCURLY material_items RCURLY {