+"#ifdef VERTEX_SHADER\n"
+"#ifdef USETRIPPY\n"
+"// LordHavoc: based on shader code linked at: http://www.youtube.com/watch?v=JpksyojwqzE\n"
+"// tweaked scale\n"
+"uniform highp float ClientTime;\n"
+"vec4 TrippyVertex(vec4 position)\n"
+"{\n"
+" float worldTime = ClientTime;\n"
+" // tweaked for Quake\n"
+" worldTime *= 10.0;\n"
+" position *= 0.125;\n"
+" //~tweaked for Quake\n"
+" float distanceSquared = (position.x * position.x + position.z * position.z);\n"
+" position.y += 5.0*sin(distanceSquared*sin(worldTime/143.0)/1000.0);\n"
+" float y = position.y;\n"
+" float x = position.x;\n"
+" float om = sin(distanceSquared*sin(worldTime/256.0)/5000.0) * sin(worldTime/200.0);\n"
+" position.y = x*sin(om)+y*cos(om);\n"
+" position.x = x*cos(om)-y*sin(om);\n"
+" return position;\n"
+"}\n"
+"#endif\n"
+"#endif\n"
+"\n"