X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flighting.h;h=931d06d3daf8d2e72aede2af04452b0d0a2e740a;hb=5c5d094255ae5b0a07f99392a5a099ad9c8e8e38;hp=5469cef5a8df3755d5c2fbb7dd13a734855d62ca;hpb=c51030d1cb2308d30db80303a561de1774dfdb76;p=libs%2Fgl.git

diff --git a/source/lighting.h b/source/lighting.h
index 5469cef5..931d06d3 100644
--- a/source/lighting.h
+++ b/source/lighting.h
@@ -24,6 +24,8 @@ private:
 	Color sky_color;
 	Vector3 sky_direction;
 	Geometry::Angle<float> horizon_angle;
+	Color fog_color;
+	float fog_density;
 	std::vector<const Light *> lights;
 
 public:
@@ -45,6 +47,16 @@ public:
 	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 &);
@@ -52,6 +64,10 @@ public:
 	/** 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;