Improve graphics quality with some shaders and effects

[r2c2.git] / source / 3d / layout.cpp

diff --git a/source/3d/layout.cpp b/source/3d/layout.cpp
index 0b457559f92d7bd8c532c1273a619606a613f225..29e6bb40daeb4a45dd686871bae173122eebf4dd 100644 (file)
--- a/source/3d/layout.cpp
+++ b/source/3d/layout.cpp
@@ -17,8 +17,8 @@ Layout3D::Layout3D(Layout &l):
 {
        // South, 15° from zenith
        sun.set_position(GL::Vector4(0, -0.259, 0.966, 0));
-       sun.set_diffuse(GL::Color(0.9));
-       lighting.set_ambient(GL::Color(0.4));
+       sun.set_diffuse(GL::Color(0.7));
+       lighting.set_ambient(GL::Color(0.2));
        lighting.attach(0, sun);
 
        layout.signal_object_added.connect(sigc::mem_fun(this, &Layout3D::object_added));
@@ -62,6 +62,24 @@ void Layout3D::remove(Utility3D &u)
        utilities.erase(&u);
 }
 
+void Layout3D::tick()
+{
+       Time::TimeDelta t = layout.get_clock().get_current_time();
+       Angle time_of_day = Angle::from_turns(t/Time::day);
+       Angle latitude = Angle::from_degrees(52.5);
+       Angle axial_tilt = Angle::from_degrees(23.45);
+       Transform trans = Transform::rotation(Angle::quarter_turn()-latitude, Vector(-1, 0, 0))*
+               Transform::rotation(Angle::half_turn()-time_of_day, Vector(0, 0, 1))*
+               Transform::rotation(axial_tilt, Vector(-1, 0, 0));
+       Vector sun_dir = trans.transform_linear(Vector(0, -1, 0));
+       Vector diff = Vector(sun.get_position())-sun_dir;
+       if(diff.norm()>0.0025f)
+               sun.set_position(GL::Vector4(sun_dir, 0.0f));
+       // TODO replace these very unscientific guesses with correct formulas
+       lighting.set_ambient(GL::Color(pow(0.2f*(sun_dir.z+1.0f), 2.0f)));
+       sun.set_diffuse(GL::Color(0.7f*max(sun_dir.z, 0.0f)));
+}
+
 void Layout3D::object_added(Object &o)
 {
        if(Track *t = dynamic_cast<Track *>(&o))