X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fmaterials%2Fdirectionallight.h;fp=source%2Fmaterials%2Fdirectionallight.h;h=8bde91cb2c94bb53947c9a9b0523ca9810088d3c;hb=adc26a2e141a2853b6c5025130c46a46cece4b84;hp=0000000000000000000000000000000000000000;hpb=e6e6f0fe81a2f92985e65ae0de708974194d81a3;p=libs%2Fgl.git

diff --git a/source/materials/directionallight.h b/source/materials/directionallight.h
new file mode 100644
index 00000000..8bde91cb
--- /dev/null
+++ b/source/materials/directionallight.h
@@ -0,0 +1,60 @@
+#ifndef MSP_GL_DIRECTIONALLIGHT_H_
+#define MSP_GL_DIRECTIONALLIGHT_H_
+
+#include "light.h"
+#include "vector.h"
+
+namespace Msp {
+namespace GL {
+
+/**
+A light source which has uniform direction and strength everywhere.
+*/
+class DirectionalLight: public Light
+{
+public:
+	class Loader: public DataFile::DerivedObjectLoader<DirectionalLight, Light::Loader>
+	{
+	private:
+		static ActionMap shared_actions;
+
+	public:
+		Loader(DirectionalLight &);
+
+	private:
+		virtual void init_actions();
+
+		void direction(float, float, float);
+	};
+
+private:
+	Color transmittance;
+	Vector3 direction;
+
+public:
+	DirectionalLight();
+
+private:
+	void update_matrix();
+
+public:
+	/** Sets the light's direction from a matrix.  The negative Z axis is used
+	as the direction.  Other axes and translation are ignored. */
+	virtual void set_matrix(const Matrix &);
+
+	void set_direction(const Vector3 &);
+
+	const Vector3 &get_direction() const { return direction; }
+
+	/** Sets a multiplier on how much light actually reaches the target.  Used
+	when modeling an atmosphere. */
+	void set_transmittance(const Color &);
+
+protected:
+	virtual void update_shader_data(ProgramData &, const std::string &) const;
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif