From 3594dace7f5eaf4f4e9c85fea3adf95e8087d253 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Mon, 11 Oct 2010 15:36:02 +0000
Subject: [PATCH] added "refraction" to parser, added RefractionNode node type

git-svn-id: svn://anubis/fart/trunk@373 7f9b0f55-74a9-4bce-be96-3c2cd072584d
---
 parser/nodes.h      | 10 ++++++++++
 parser/parser.lex   |  1 +
 parser/parser.yy    |  2 ++
 vim/syntax/fart.vim |  2 +-
 4 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/parser/nodes.h b/parser/nodes.h
index d949e1d..fa84c60 100644
--- a/parser/nodes.h
+++ b/parser/nodes.h
@@ -410,6 +410,16 @@ class ReflectanceNode : public NumberNode
         }
 };
 
+class RefractionNode : public NumberNode
+{
+    public:
+        RefractionNode(NodeRef e) : NumberNode(e) {}
+        virtual NodeRef evaluate()
+        {
+            return new RefractionNode(m_expr->evaluate());
+        }
+};
+
 class RotateNode : public VectorNode
 {
     public:
diff --git a/parser/parser.lex b/parser/parser.lex
index ad1bebe..15c486a 100644
--- a/parser/parser.lex
+++ b/parser/parser.lex
@@ -76,6 +76,7 @@ polygon             return POLYGON;
 position            return POSITION;
 radius              return RADIUS;
 reflectance         return REFLECTANCE;
+refraction          return REFRACTION;
 rotate              return ROTATE;
 scale               return SCALE;
 scene               return SCENE;
diff --git a/parser/parser.yy b/parser/parser.yy
index eed22a4..f824953 100644
--- a/parser/parser.yy
+++ b/parser/parser.yy
@@ -94,6 +94,7 @@ refptr<Scope> parser_scope;
 %token POSITION;
 %token RADIUS;
 %token REFLECTANCE;
+%token REFRACTION;
 %token ROTATE;
 %token SCALE;
 %token SCENE;
@@ -197,6 +198,7 @@ general_item: AMBIENT vector3 { $$ = new AmbientNode($2); }
             }
             | RADIUS expression { $$ = new RadiusNode($2); }
             | REFLECTANCE expression { $$ = new ReflectanceNode($2); }
+            | REFRACTION expression { $$ = new RefractionNode($2); }
             | ROTATE expression COMMA vector3 { $$ = new RotateNode($2, $4); }
             | SCALE expression { $$ = new ScaleNode(new ScaleScalarNode($2)); }
             | SCALE vector2 { $$ = new ScaleNode($2); }
diff --git a/vim/syntax/fart.vim b/vim/syntax/fart.vim
index 1989499..884f07c 100644
--- a/vim/syntax/fart.vim
+++ b/vim/syntax/fart.vim
@@ -10,7 +10,7 @@ endif
 
 syn case match
 
-syn keyword fartKeywords ambient ambient_occlusion color define diffuse exposure height jitter look_at material max_depth multisample ngon offset polygon position radius reflectance rotate scale shininess size specular translate transparency union up vfov width
+syn keyword fartKeywords ambient ambient_occlusion color define diffuse exposure height jitter look_at material max_depth multisample ngon offset polygon position radius reflectance refraction rotate scale shininess size specular translate transparency union up vfov width
 syn keyword fartObjects box camera cyl extrude intersect light options plane scene shape sphere subtract union
 syn keyword fartControl for while if else elsif local
 syn match fartNumber "\(^\|\W\)\@<=[+-]\=\(\d\+\)\=\.\=\d\+\([eE][+-]\=\d\+\)\="