+"uniform samplerBuffer uLightsArray;\n"
+"uniform usampler3D uLightsIndex;\n"
+"\n"
+"#line 1 1 \n"
+"//const vec3 DAYSKY_COLOUR = vec3( 0.37, 0.54, 0.97 );\n"
+"//const vec3 NIGHTSKY_COLOUR = vec3( 0.03, 0.05, 0.20 );\n"
+"//const vec3 SUNSET_COLOUR = vec3( 1.00, 0.32, 0.01 );\n"
+"//const vec3 AMBIENT_COLOUR = vec3( 0.13, 0.17, 0.35 );\n"
+"//const vec3 SUNSET_AMBIENT = vec3( 0.25, 0.17, 0.51 );\n"
+"//const vec3 SUN_COLOUR = vec3( 1.10, 0.89, 0.35 );\n"
+"\n"
+"const float SUN_ANGLE = 0.0001;\n"
+"const float PI = 3.14159265;\n"
+"\n"
+"//struct world_info\n"
+"//{\n"
+"// float time,\n"
+"// time_of_day,\n"
+"// day_phase,\n"
+"// sunset_phase;\n"
+"// \n"
+"// vec3 sun_dir;\n"
+"//};\n"
+"\n"
+"float luminance( vec3 v )\n"
+"{\n"
+" return dot( v, vec3(0.2126, 0.7152, 0.0722) );\n"
+"}\n"
+"\n"
+"vec3 clearskies_ambient( vec3 dir )\n"
+"{\n"
+" float sun_azimuth = g_sunset_phase * (dot( dir.xz, g_sun_dir.xz )*0.4+0.6);\n"
+" float sky_gradient = dir.y;\n"
+" \n"
+" /* Blend phase colours */\n"
+" vec3 ambient = g_daysky_colour.rgb * (g_day_phase-g_sunset_phase*0.1);\n"
+" ambient += g_sunset_colour.rgb * (1.0-dir.y*0.5)*sun_azimuth;\n"
+" ambient += g_nightsky_colour.rgb * (1.0-g_day_phase);\n"
+" \n"
+" /* Add gradient */\n"
+" ambient -= sky_gradient * luminance(ambient);\n"
+" \n"
+" return ambient;\n"
+"}\n"
+"\n"
+"vec3 clearskies_sky( vec3 ray_dir )\n"
+"{\n"
+" ray_dir.y = abs( ray_dir.y );\n"
+" vec3 sky_colour = clearskies_ambient( ray_dir );\n"
+" \n"
+" /* Sun */\n"
+" float sun_theta = dot( ray_dir, g_sun_dir.xyz );\n"
+" float sun_size = max( 0.0, sun_theta * 0.5 + 0.5 + SUN_ANGLE );\n"
+" float sun_shape = pow( sun_size, 2000.0 );\n"
+" sun_shape += sun_size * max(g_sun_dir.y,0.0) * 0.5;\n"
+" \n"
+" vec3 sun_colour = mix( vec3(1.0), g_sunset_colour.rgb, g_sunset_phase*0.5 );\n"
+" sun_colour *= sun_shape;\n"
+" \n"
+" vec3 composite = sky_colour + sun_colour;\n"
+" return composite;\n"
+"}\n"
+"\n"
+"vec3 clearskies_lighting( vec3 normal, float shadow, vec3 halfview )\n"
+"{\n"
+" float fresnel = 1.0 - abs(dot(normal,halfview));\n"
+"\n"
+" vec3 reflect_colour = mix( g_daysky_colour.rgb, g_sunset_colour.rgb, \n"
+" g_sunset_phase );\n"
+"\n"
+" vec3 sky_reflection = 0.5 * fresnel * reflect_colour;\n"
+" vec3 light_sun = max(0.0,dot(normal,g_sun_dir.xyz)*0.75+0.25) \n"
+" * g_sun_colour.rgb * g_day_phase;\n"
+"\n"
+" float scaled_shadow = max( shadow, 1.0 - max(g_sun_dir.y,0.0) );\n"
+" vec3 ambient = mix( g_ambient_colour.rgb, g_sunset_ambient.rgb, \n"
+" g_sunset_phase );\n"
+"\n"
+" return ambient + (light_sun + sky_reflection) * shadow;\n"
+"}\n"
+"\n"
+"#line 41 0 \n"