Support fog in lighting and shaders

[libs/gl.git] / source / lighting.h

diff --git a/source/lighting.h b/source/lighting.h
index 8b3feb5f343af74622aa26b8b9689697a8da09a3..931d06d3daf8d2e72aede2af04452b0d0a2e740a 100644 (file)
--- 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 &);