Add some accessors

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

diff --git a/source/lighting.cpp b/source/lighting.cpp
index aae5d331384919e0af9f8523523eda56a5273bab..a927d622fade9b0c81a916f51ef31bce079bf825 100644 (file)
--- a/source/lighting.cpp
+++ b/source/lighting.cpp
@@ -1,12 +1,21 @@
+#include <stdexcept>
+#include <msp/gl/extensions/msp_legacy_features.h>
+#include "error.h"
 #include "light.h"
 #include "lighting.h"
+#include "lightunit.h"
+#include "matrix.h"
 #include "misc.h"
 
+using namespace std;
+
 namespace Msp {
 namespace GL {
 
 Lighting::Lighting():
-       ambient(0.2)
+       ambient(0.2),
+       sky_direction(0, 0, 1),
+       horizon_angle(Geometry::Angle<float>::zero())
 { }
 
 void Lighting::set_ambient(const Color &a)
@@ -14,6 +23,21 @@ void Lighting::set_ambient(const Color &a)
        ambient = a;
 }
 
+void Lighting::set_sky_color(const Color &s)
+{
+       sky_color = s;
+}
+
+void Lighting::set_sky_direction(const Vector3 &d)
+{
+       sky_direction = d;
+}
+
+void Lighting::set_horizon_angle(const Geometry::Angle<float> &a)
+{
+       horizon_angle = a;
+}
+
 void Lighting::attach(unsigned i, const Light &l)
 {
        if(i>=lights.size())
@@ -34,8 +58,29 @@ void Lighting::detach(unsigned i)
                Light::unbind_from(i);
 }
 
+const Light *Lighting::get_attached_light(unsigned i) const
+{
+       return i<lights.size() ? lights[i] : 0;
+}
+
+void Lighting::update_shader_data(ProgramData &shdata, const Matrix &view_matrix) const
+{
+       shdata.uniform("ambient_color", ambient);
+       shdata.uniform("sky_color", sky_color);
+       shdata.uniform("eye_sky_dir", view_matrix.block<3, 3>(0, 0)*sky_direction);
+       shdata.uniform("horizon_limit", horizon_angle.radians());
+
+       for(unsigned i=0; i<lights.size(); ++i)
+               if(lights[i])
+                       lights[i]->update_shader_data(shdata, view_matrix, i);
+}
+
 void Lighting::bind() const
 {
+       static Require _req(MSP_legacy_features);
+       if(lights.size()>LightUnit::get_n_units())
+               throw invalid_operation("Lighting::bind");
+
        if(!set_current(this))
                return;