X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flight.h;h=ee62ce35634213f2e6af365f5169e2d2cf0e59c7;hb=5c5d094255ae5b0a07f99392a5a099ad9c8e8e38;hp=e9b032694565e7e857e32fada5d84a0d70013505;hpb=efe80f5a696b4a3be2378dc6d635c89676afa12d;p=libs%2Fgl.git

diff --git a/source/light.h b/source/light.h
index e9b03269..ee62ce35 100644
--- a/source/light.h
+++ b/source/light.h
@@ -1,45 +1,87 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_GL_LIGHT_H_
 #define MSP_GL_LIGHT_H_
 
 #include <vector>
 #include "color.h"
+#include "vector.h"
 
 namespace Msp {
 namespace GL {
 
+class Matrix;
+class ProgramData;
+
+/**
+Stores properties of a single light source.
+
+Lights do not cast shadows by themselves.  See ShadowMap for that.
+*/
 class Light
 {
 private:
-	Color ambient;
+	enum ParameterMask
+	{
+		DIFFUSE = 1,
+		SPECULAR = 2,
+		POSITION = 4,
+		SPOT_DIR = 8,
+		SPOT_EXP = 16,
+		SPOT_CUTOFF = 32,
+		ATTENUATION = 64
+	};
+
 	Color diffuse;
 	Color specular;
-	float x, y, z, w;
-	float sdx, sdy, sdz;
+	Vector4 position;
+	Vector3 spot_dir;
 	float spot_exp;
 	float spot_cutoff;
 	float attenuation[3];
 
-	static unsigned current_unit;
-	static std::vector<const Light *> current_lights;
-
 public:
 	Light();
-	void set_ambient(const Color &c);
+	~Light();
+
+private:
+	void update_parameter(int, int = -1) const;
+
+public:
+	/** Sets the diffuse (direction-independent) color of the Light.  Provided
+	to shaders with the name light_sources[i].diffuse. */
 	void set_diffuse(const Color &c);
+
+	/** Sets the specular (direction-dependent) color of the Light.  Provided to
+	shaders with the name light_sources[i].diffuse. */
 	void set_specular(const Color &c);
-	void set_position(float, float, float, float);
-	void bind() const;
+
+	const Color &get_diffuse() const { return diffuse; }
+	const Color &get_specular() const { return specular; }
+
+	/** Sets the position of the Light.  For a directional light, set the xyz
+	components to a vector pointing towards the light and the w component to 0. */
+	void set_position(const Vector4 &);
+
+	const Vector4 &get_position() const { return position; }
+
+	void set_spot_direction(const Vector3 &);
+	void set_spot_exponent(float);
+	void set_spot_cutoff(float);
+	const Vector3 &get_spot_direction() const { return spot_dir; }
+	float get_spot_exponent() const { return spot_exp; }
+	float get_spot_cutoff() const { return spot_cutoff; }
+	void set_attenuation(float, float, float);
+	const float *get_attenuation() const { return attenuation; }
+
+	/** Updates a ProgramData object with the uniforms for the Light.  A view
+	matrix and light source index must be passed in. */
+	void update_shader_data(ProgramData &, const Matrix &, unsigned) const;
+
+	void bind() const { return bind_to(0); }
 	void bind_to(unsigned) const;
 
-	static void activate(unsigned);
-	static void unbind();
+	static const Light *current(unsigned = 0);
+	static void unbind() { return unbind_from(0); }
+	static void unbind_from(unsigned);
 };
 
 } // namespace GL