X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fmaterials%2Flighting.h;fp=source%2Fmaterials%2Flighting.h;h=ca214fc829601c9c26fa05e73e9e6d37f08d46be;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/materials/lighting.h b/source/materials/lighting.h
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+++ b/source/materials/lighting.h
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+#ifndef MSP_GL_LIGHTING_H_
+#define MSP_GL_LIGHTING_H_
+
+#include <vector>
+#include <msp/geometry/angle.h>
+#include "color.h"
+#include "gl.h"
+#include "programdata.h"
+
+namespace Msp {
+namespace GL {
+
+class Light;
+
+/**
+Encapsulates global lighting parameters and any number of individual light
+sources.
+*/
+class Lighting
+{
+public:
+	class Loader: public DataFile::ObjectLoader<Lighting>
+	{
+	public:
+		Loader(Lighting &);
+
+	private:
+		void ambient(float, float, float);
+		void fog_color(float, float, float);
+		void fog_density(float);
+		void fog_half_distance(float);
+		void horizon_angle(float);
+		void light(unsigned);
+		void sky_color(float, float, float);
+		void zenith_direction(float, float, float);
+	};
+
+private:
+	Color ambient;
+	Color sky_color;
+	Vector3 zenith_direction;
+	Geometry::Angle<float> horizon_angle;
+	Color fog_color;
+	float fog_density;
+	std::vector<const Light *> lights;
+	std::vector<Light *> owned_data;
+
+public:
+	Lighting();
+	~Lighting();
+
+	/** Sets the ambient lighting color.  Affects all surfaces in the scene. */
+	void set_ambient(const Color &);
+
+	const Color &get_ambient() const { return ambient; }
+
+	/** Sets the color of the sky at zenith.  Has no effect without shaders. */
+	void set_sky_color(const Color &);
+
+	/** Sets the direction of the zenith.  Defaults to positive Z axis.  Has no
+	effect without shaders. */
+	void set_zenith_direction(const Vector3 &);
+
+	/** Sets the angle where skylight cuts off, counted from the true horizon.
+	Has no effect without shaders. */
+	void set_horizon_angle(const Geometry::Angle<float> &);
+
+	/** Sets the fog color, which is blended into distant surfaces. */
+	void set_fog_color(const Color &);
+
+	/** Sets the density of the fog.  Zero means no fog. */
+	void set_fog_density(float);
+
+	/** Sets the density of the fog so that the blending factor at the given
+	distance is 50%. */
+	void set_fog_half_distance(float);
+
+	/** Attaches a light source. */
+	void attach(unsigned, const Light &);
+
+	/** Detaches a light source. */
+	void detach(unsigned);
+
+	/** Returns an attached light.  If no light is attached at that index, null
+	is returned. */
+	const Light *get_attached_light(unsigned) const;
+
+	/** Updates a ProgramData object with the uniforms for the Lighting,
+	including all attached light sources.  A view matrix must be passed in. */
+	void update_shader_data(ProgramData &, const Matrix &) const;
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif