port from perforce

hgplus/ShaderMinifier/tests/real/the orange guy/tunnel_pixel.glsl

@@ -0,0 +1,20 @@
+
+varying vec2 st;
+uniform float alpha;
+uniform sampler2D tex;
+uniform float time;
+uniform vec4 color;
+varying float prof;
+
+void main()
+{
+	
+	vec3 texcolor = texture2D(tex, st).rgb;
+	
+	float opacity = alpha < 0.9 ? 1.0 : 1.0 - 0.7 * dot(vec3(0.33,0.33,0.33), texcolor);
+	
+	opacity *= exp(-0.10 * abs(prof));
+	
+	gl_FragData[0] = color * vec4(texcolor * 1.6,  opacity);	
+	
+}