Rearrange soucre files into subdirectories

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

diff --git a/source/materials/lighting.h b/source/materials/lighting.h
new file mode 100644 (file)
index 0000000..ca214fc
--- /dev/null
+++ b/source/materials/lighting.h
@@ -0,0 +1,96 @@
+#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