X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fmaterials%2Flight.h;h=189380cdb7a1e2f1b619423761b708bfadc8b2dc;hp=c7e281887651c7f3d5495f86c34960055d9429e9;hb=HEAD;hpb=dff7004fa078d55911664c0f513b5dc6c9449420

diff --git a/source/materials/light.h b/source/materials/light.h
index c7e28188..189380cd 100644
--- a/source/materials/light.h
+++ b/source/materials/light.h
@@ -1,7 +1,8 @@
 #ifndef MSP_GL_LIGHT_H_
 #define MSP_GL_LIGHT_H_
 
-#include <vector>
+#include <string>
+#include <msp/datafile/dynamicobjectloader.h>
 #include <msp/datafile/objectloader.h>
 #include "color.h"
 #include "placeable.h"
@@ -9,103 +10,67 @@
 namespace Msp {
 namespace GL {
 
-class Matrix;
 class ProgramData;
 
 /**
-Stores properties of a single light source.  Lights can be directional, point
-lights or spotlights.  No explicit type parameter is provided; rather the
-other parameters determine what kind of light it is.  If the fourth component
-of position is zero, it's a directional light.  Otherwise, if the spot cutoff
-is not 180 degrees, it's a spotlight.  Otherwise it's an omnidirectional point
-light.
+Base class for light sources.  The DirectionalLight and PointLight classes
+implement different types of lights.
 
 Lights are usually grouped with a Lighting object, which can be used in a
 Sequence::Step.
 
-Lights do not cast shadows by themselves.  See ShadowMap for that.
+Shadows can be added to lights by using the ShadowMap effect.
 */
 class Light: public Placeable
 {
-public:
+protected:
 	class Loader: public DataFile::ObjectLoader<Light>
 	{
-	public:
+	protected:
 		Loader(Light &);
 
+		virtual void init_actions();
+
 	private:
-		void attenuation(float, float, float);
-		void diffuse(float, float, float);
-		void position(float, float, float, float);
-		void specular(float, float, float);
-		void spot_direction(float, float, float);
-		void spot_exponent(float);
-		void spot_cutoff(float);
+		void color(float, float, float);
 	};
 
-private:
-	Color diffuse;
-	Color specular;
-	Vector4 position;
-	Vector3 spot_dir;
-	Vector3 direction;
-	float spot_exp;
-	Geometry::Angle<float> spot_cutoff;
-	float attenuation[3];
-
 public:
-	Light();
-
-private:
-	void update_matrix();
-
-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].specular. */
-	void set_specular(const Color &c);
+	class GenericLoader: public DataFile::DynamicObjectLoader<Light>
+	{
+		friend class Light;
 
-	const Color &get_diffuse() const { return diffuse; }
-	const Color &get_specular() const { return specular; }
+	public:
+		GenericLoader(Collection &c): DynamicObjectLoader<Light>(&c) { }
 
-	/** Sets the postion and orientation of the Light from a matrix.  Negative Z
-	axis is used as the spot direction, other axes are ignored. */
-	virtual void set_matrix(const Matrix &);
+	protected:
+		virtual const TypeRegistry &get_type_registry() const { return Light::get_light_registry(); }
+	};
 
-	/** 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 &);
+protected:
+	Color color = { 1.0f };
+	unsigned generation = 0;
 
-	const Vector4 &get_position() const { return position; }
+	Light() = default;
+public:
+	virtual ~Light() = default;
 
-	/** Sets the direction of a spotlight.  Has no effect if spotlight cutoff is
-	not set. */
-	void set_spot_direction(const Vector3 &);
+	/** Sets the color of the light. */
+	void set_color(const Color &);
 
-	/** Sets the angular falloff exponent of the spotlight.  Must be >= 0. */
-	void set_spot_exponent(float);
+	const Color &get_color() const { return color; }
 
-	/** Sets the cutoff angle of a spotlight.  Beyond this angle from its axis
-	the spotlight provides no illumination.  Must be between 0 and 90 degrees,
-	or exactly 180 degrees to indicate a non-spotlight. */
-	void set_spot_cutoff(const Geometry::Angle<float> &);
+	unsigned get_generation() const { return generation; }
 
-	/** Disables spotlight, reverting to an omnidirectional point light.
-	Equivalent to setting the spot cutoff to 180 degrees. */
-	void disable_spot_cutoff();
+	/** Updates a ProgramData object with the uniform values for the light.  A
+	light source index must be passed in. */
+	void update_shader_data(ProgramData &, unsigned) const;
 
-	const Vector3 &get_spot_direction() const { return spot_dir; }
-	float get_spot_exponent() const { return spot_exp; }
-	const Geometry::Angle<float> &get_spot_cutoff() const { return spot_cutoff; }
-	void set_attenuation(float, float, float);
-	const float *get_attenuation() const { return attenuation; }
+protected:
+	virtual void update_shader_data(ProgramData &, const std::string &) const = 0;
 
-	/** 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;
+private:
+	static GenericLoader::TypeRegistry &get_light_registry();
 };
 
 } // namespace GL