Support material layer blending.

1 files changed, 28 insertions, 8 deletions

diff --git a/src/model/layer.h b/src/model/layer.h
index 5cc7d2b..d6af529 100644
--- a/src/model/layer.h
+++ b/src/model/layer.h
@@ -47,6 +47,15 @@ public:
 		TCGenBase = 1, 			// use texture coordinates from vertex array
 		TCGenEnvironment = 2 		// texture coordinates generated by GL_SPHERE_MAP/GL_REFLECTION_MAP
 	};
+	
+	/**
+	 * @brief blend functions definition
+	 * */
+	enum BlendFunc {
+		BlendFuncNone = 0,		// no blending
+		BlendFuncAdd = 1,		// GL_ONE GL_OME
+		BlendFuncBlend = 2		// GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA
+	};
 
 	/**
 	 * @brief default constructor
@@ -130,9 +139,17 @@ public:
 	/**
 	 * @brief returns true if lighting calculations should be disabled for this layer
 	 * */
-	 inline const bool bright() const
+	 inline const bool fullbright() const
+	 {
+		 return layer_fullbright;
+	 }
+	 
+	 /**
+	  * @brief returns the current alpha blending function
+	  * */
+	 inline const BlendFunc blendfunc() const
 	 {
-		 return layer_bright;
+		 return layer_blendfunc;
 	 }
 		
 	/* ---- mutators ------------------------------------------- */
@@ -153,7 +170,6 @@ public:
 	 * */
 	void set_specular(const math::Color & specular);
 	
-	
 	/**
 	 * @brief set the texture map type
 	 * */
@@ -178,26 +194,30 @@ public:
 	 * @brief enable or disable lighting calculations on this layer
 	 * If set to true, lighting is disabled.
 	 * */
-	void set_bright(const bool bright);
+	void set_fullbright(const bool fullbright);
 	
 	/**
 	 * @brief set the layer size, in pixels
 	 * */
 	void set_size(const math::Vector2f & size);
+	
+	/**
+	 * @brief set alpha blending function
+	 * */
+	void set_blendfunc(const BlendFunc blendfunc);
 
 private:
 	math::Vector2f			layer_size;
 	RGBGen				layer_rgbgen;
 	math::Color			layer_color;
-	math::Color			layer_color_specular;
-	
+	math::Color			layer_color_specular;	
 	TexMap				layer_texmap;
 	std::string			layer_texture_name;
 	size_t				layer_texture_id;
-		
 	TCGen				layer_tcgen;
+	bool				layer_fullbright;
+	BlendFunc			layer_blendfunc;
 	
-	bool				layer_bright;
 };
 	
 } // namespace model