X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=demos%2Fdesertpillars%2Fsource%2Fdesertpillars.cpp;fp=demos%2Fdesertpillars%2Fsource%2Fdesertpillars.cpp;h=513d81743d700dec32bc734eea0ff63357ea4a49;hp=84583551a75d484ca9a2c52d55680897738c6873;hb=be3b67fdd0d0420ffc1e97a6535159c63a97fdc8;hpb=0542080f04c13236dc04a4f19e8a30016ad86bfa

diff --git a/demos/desertpillars/source/desertpillars.cpp b/demos/desertpillars/source/desertpillars.cpp
index 84583551..513d8174 100644
--- a/demos/desertpillars/source/desertpillars.cpp
+++ b/demos/desertpillars/source/desertpillars.cpp
@@ -29,6 +29,8 @@ DesertPillars::DesertPillars(int, char **):
 	sphere_morph(0.0f),
 	sphere_frozen(false),
 	sphere_stopped(false),
+	sun(resources.get<GL::DirectionalLight>("Sun.light")),
+	sun_angle(Geometry::Angle<float>::from_turns(0.1f)),
 	camera_stopped(false)
 {
 	window.set_title("Desert Pillars");
@@ -43,7 +45,6 @@ DesertPillars::DesertPillars(int, char **):
 	global_env->set_fixed_position(GL::Vector3(0.0f, 0.0f, 0.0f));
 	global_env->set_debug_name("Global environment");
 
-	GL::DirectionalLight &sun = resources.get<GL::DirectionalLight>("Sun.light");
 	sky = make_unique<GL::Sky>(*global_env, sun);
 	sky->set_debug_name("Sky");
 
@@ -78,6 +79,10 @@ DesertPillars::DesertPillars(int, char **):
 	view.set_content(sequence.get());
 	view.set_camera(&camera);
 
+	const GL::Vector3 &sun_direction = sun.get_direction();
+	sun_node = normalize(GL::Vector3(sun_direction.y, -sun_direction.x, 0.0f));
+	sun_axis = normalize(cross(sun_direction, sun_node));
+
 	const GL::Vector3 &cam_pos = camera.get_position();
 	camera_distance = cam_pos.norm();
 	camera_angle = Geometry::atan2(cam_pos.y, cam_pos.x);
@@ -118,6 +123,9 @@ void DesertPillars::tick()
 		camera.set_look_direction(-cam_dir);
 	}
 
+	sun_angle += Geometry::Angle<float>::from_degrees(4*dt/Time::sec);
+	sun.set_direction(GL::Matrix::rotation(sun_angle, sun_axis)*-sun_node);
+
 	display.tick();
 	view.render();
 }