1 files changed, 147 insertions, 0 deletions
diff --git a/src/render/sky.cc b/src/render/sky.cc
new file mode 100644
index 0000000..e40c4be
--- /dev/null
+++ b/src/render/sky.cc
@@ -0,0 +1,147 @@
+/*
+   render/sky.cc
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+#include "render/camera.h"
+#include "render/sky.h"
+#include "render/textures.h"
+
+namespace render 
+{
+	
+size_t Sky::sky_texture_up = 0;
+size_t Sky::sky_texture_down = 0;
+size_t Sky::sky_texture_left = 0;
+size_t Sky::sky_texture_right = 0;
+size_t Sky::sky_texture_front = 0;
+size_t Sky::sky_texture_back = 0;
+
+std::string  Sky::sky_name;
+
+void Sky::draw(const std::string & name)
+{
+	if (sky_name.compare(name) != 0) {
+		unload();
+	}
+	
+	if (!sky_name.size()) {
+		
+		if (name.size()) {
+			const std::string basename("textures/sky/" + name);
+			
+			sky_texture_up = Textures::load(basename + "_up");
+			sky_texture_down = Textures::load(basename + "_down");
+			sky_texture_left = Textures::load(basename + "_left");
+			sky_texture_right = Textures::load(basename + "_right");
+			sky_texture_front = Textures::load(basename + "_front");
+			sky_texture_back = Textures::load(basename + "_back");
+		}
+		sky_name.assign(name);
+	}
+
+	/*
+	 * NOTE
+	 *  for quake3 skyboxes: the _left texture is actually the right side  of the skybox
+	 */
+	gl::push();
+	gl::translate(Camera::eye());
+	gl::enable(GL_TEXTURE_2D);
+	gl::color(1.0f, 1.0f, 1.0f, 1.0f);
+	
+	// front
+	Textures::bind(sky_texture_front);
+	gl::begin(gl::Quads);
+	gl::texcoord(0, 0); gl::vertex(1, 1, 1);
+	gl::texcoord(1, 0); gl::vertex(1, -1, 1);
+	gl::texcoord(1, 1); gl::vertex(1, -1, -1);
+	gl::texcoord(0, 1); gl::vertex(1, 1, -1);	
+	gl::end();
+	
+	// right
+	Textures::bind(sky_texture_right);
+	gl::begin(gl::Quads);
+	gl::texcoord(0, 0); gl::vertex(1, -1, 1);
+	gl::texcoord(1, 0); gl::vertex(-1, -1, 1);
+	gl::texcoord(1, 1); gl::vertex(-1, -1, -1);
+	gl::texcoord(0, 1); gl::vertex(1, -1, -1);
+	gl::end();
+	
+	// back
+	Textures::bind(sky_texture_back);
+	gl::begin(gl::Quads);
+	gl::texcoord(0, 0); gl::vertex(-1, -1, 1);
+	gl::texcoord(1, 0); gl::vertex(-1, 1, 1);
+	gl::texcoord(1, 1); gl::vertex(-1, 1, -1);
+	gl::texcoord(0, 1); gl::vertex(-1, -1, -1);
+	gl::end();
+	
+	// left
+	Textures::bind(sky_texture_left);
+	gl::begin(gl::Quads);
+	gl::texcoord(0, 0); gl::vertex(-1, 1, 1);
+	gl::texcoord(1, 0); gl::vertex(1, 1, 1);
+	gl::texcoord(1, 1); gl::vertex(1, 1, -1);	
+	gl::texcoord(0, 1); gl::vertex(-1, 1, -1);
+	gl::end();
+	
+	// up
+	Textures::bind(sky_texture_up);
+	gl::begin(gl::Quads);
+	gl::texcoord(0, 0); gl::vertex(-1, 1, 1);
+	gl::texcoord(1, 0); gl::vertex(-1, -1, 1);
+	gl::texcoord(1, 1); gl::vertex(1, -1, 1);
+	gl::texcoord(0, 1); gl::vertex(1, 1, 1);
+	gl::end();
+	
+	// down
+	Textures::bind(sky_texture_down);
+	gl::begin(gl::Quads);
+	gl::texcoord(0, 0); gl::vertex(1, 1, -1);
+	gl::texcoord(1, 0); gl::vertex(1, -1, -1);
+	gl::texcoord(1, 1); gl::vertex(-1, -1, -1);
+	gl::texcoord(0, 1); gl::vertex(-1, 1, -1);
+	gl::end();
+
+	gl::pop();
+	
+	gl::disable(GL_TEXTURE_2D);
+}
+
+void Sky::unload()
+{
+	if (sky_texture_up) {
+		Textures::unload(sky_texture_up);
+		sky_texture_up = 0;
+	}
+	
+	if (sky_texture_down) {
+		Textures::unload(sky_texture_down);
+		sky_texture_down = 0;
+	}
+	
+	if (sky_texture_left) {
+		Textures::unload(sky_texture_left);
+		sky_texture_left = 0;
+	}
+	
+	if (sky_texture_right) {
+		Textures::unload(sky_texture_right);
+		sky_texture_right = 0;
+	}
+	
+	if (sky_texture_front) {
+		Textures::unload(sky_texture_front);
+		sky_texture_front = 0;
+	}
+	
+	if (sky_texture_back) {
+		Textures::unload(sky_texture_back);
+		sky_texture_back = 0;
+	}
+	
+	sky_name.clear();
+}
+
+} // namespace render