Initial commit

data/shaders/sky.vertex

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+// __multiversion__
+// This signals the loading code to prepend either #version 100 or #version 300 es as apropriate.
+
+// To use centroid sampling we need to have version 300 es shaders, which requires changing:
+// attribute to in
+// varying to out when in vertex shaders or in when in fragment shaders
+// defining an out vec4 FragColor and replacing uses of gl_FragColor with FragColor
+// texture2D to texture
+#if __VERSION__ >= 300
+#define attribute in
+#define varying out
+
+#else
+
+
+#endif
+
+uniform MAT4 WORLDVIEWPROJ;
+uniform vec4 FOG_COLOR;
+uniform vec4 CURRENT_COLOR;
+
+attribute mediump vec4 POSITION;
+attribute vec4 COLOR;
+
+varying vec4 color;
+
+const float fogNear = 0.3;
+
+void main()
+{
+    gl_Position = WORLDVIEWPROJ * POSITION;
+
+    color = mix( CURRENT_COLOR, FOG_COLOR, COLOR.r );
+}