added refraction parameters to materials

git-svn-id: svn://anubis/fart/trunk@374 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Material.h

@@ -33,6 +33,9 @@ class Material
         void setReflectance(double reflectance) { m_reflectance = reflectance; }
         double getReflectance() const { return m_reflectance; }
 
+        void setRefraction(double refraction) { m_refraction = refraction; }
+        double getRefraction() const { return m_refraction; }
+
         void setTransparency(double t) { m_transparency = t; }
         double getTransparency() const { return m_transparency; }
 
@@ -42,6 +45,7 @@ class Material
         Color m_specular_color;
         double m_shininess;
         double m_reflectance;
+        double m_refraction;
         double m_transparency;
 };