X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flighting.h;h=931d06d3daf8d2e72aede2af04452b0d0a2e740a;hb=6dc2da27f0831d4172fcfeba4900616fd6c844b8;hp=7c7dc454c14f027e1fed3c17f62ec5b6b9b3c608;hpb=a6acc6fc98f8571eaaa66f726c1ff4d60abe4f58;p=libs%2Fgl.git

diff --git a/source/lighting.h b/source/lighting.h
index 7c7dc454..931d06d3 100644
--- a/source/lighting.h
+++ b/source/lighting.h
@@ -2,6 +2,7 @@
 #define MSP_GL_LIGHTING_H_
 
 #include <vector>
+#include <msp/geometry/angle.h>
 #include "bindable.h"
 #include "color.h"
 #include "gl.h"
@@ -13,26 +14,64 @@ namespace GL {
 class Light;
 
 /**
-Encapsulates global lighting parameters and a number of individual lights.
+Encapsulates global lighting parameters and any number of individual light
+sources.
 */
 class Lighting: public Bindable<Lighting>
 {
 private:
 	Color ambient;
+	Color sky_color;
+	Vector3 sky_direction;
+	Geometry::Angle<float> horizon_angle;
+	Color fog_color;
+	float fog_density;
 	std::vector<const Light *> lights;
-	ProgramData shdata;
 
 public:
 	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 sky.  Defaults to positive Z axis.  Has no
+	effect without shaders. */
+	void set_sky_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.  If the attachment index is greater than
+	LightUnit::get_n_units, the Lighting can't be bound for legacy mode. */
 	void attach(unsigned, const Light &);
+
+	/** Detaches a light source. */
 	void detach(unsigned);
 
-	void update_shader_data(const Matrix &);
-	const ProgramData &get_shader_data() const { return shdata; }
+	/** 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;
+
 	void bind() const;
 
 	static void unbind();