X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fmodel_sky.h;h=4ff6a70c7fc9bc0de8316c55cbe627e3f1d8be76;hb=0ca7f5ca2560908de1a03db112df67e52b476107;hp=8fe64c41dd373ad3e294a3964a7139b9d801624f;hpb=98b9bcf0e10bc02cf679d03fa269613e140ba878;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/model_sky.h b/shaders/model_sky.h
index 8fe64c4..4ff6a70 100644
--- a/shaders/model_sky.h
+++ b/shaders/model_sky.h
@@ -74,36 +74,128 @@ static struct vg_shader _shader_model_sky = {
 "in vec3 aCo;\n"
 "in vec3 aWorldCo;\n"
 "\n"
+"// Spooky!\n"
+"const vec3 uCamera = vec3(0.0);\n"
+"\n"
 "#line       1        1 \n"
 "layout (location = 0) out vec4 oColour;\n"
 "\n"
+"// OpenGL wiki: Recommends do not use vec3 because of drivers. hence the v4s...\n"
 "layout (std140) uniform ub_world_lighting\n"
 "{\n"
 "   vec4 g_cube_min;\n"
 "   vec4 g_cube_inv_range;\n"
 "\n"
-"   vec4 g_light_colours[3];\n"
-"   vec4 g_light_directions[3];\n"
-"   vec4 g_ambient_colour;\n"
-"\n"
 "   vec4 g_water_plane;\n"
 "   vec4 g_depth_bounds;\n"
+"\n"
+"   vec4 g_daysky_colour;\n"
+"   vec4 g_nightsky_colour;\n"
+"   vec4 g_sunset_colour;\n"
+"   vec4 g_ambient_colour;\n"
+"   vec4 g_sunset_ambient;\n"
+"   vec4 g_sun_colour;\n"
+"   vec4 g_sun_dir;\n"
+"\n"
 "   float g_water_fog;\n"
 "   float g_time;\n"
-"   int g_light_count;\n"
+"   float g_shadow_length;\n"
+"   float g_shadow_spread;\n"
+"\n"
+"   float g_time_of_day;\n"
+"   float g_day_phase;\n"
+"   float g_sunset_phase;\n"
+"\n"
 "   int g_light_preview;\n"
 "   int g_shadow_samples;\n"
 "\n"
 "   int g_debug_indices;\n"
 "   int g_debug_complexity;\n"
-"\n"
-"   // g_time ?\n"
-"\n"
-"   //vec4 g_point_light_positions[32];\n"
-"   //vec4 g_point_light_colours[32];\n"
 "};\n"
 "\n"
 "uniform sampler2D g_world_depth;\n"
+"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"
 "\n"
 "float world_depth_sample( vec3 pos )\n"
 "{\n"
@@ -124,21 +216,7 @@ static struct vg_shader _shader_model_sky = {
 "   float height_sample = world_depth_sample( sample_pos );\n"
 "\n"
 "   float fdelta = height_sample - sample_pos.y;\n"
-"   return clamp( fdelta, 0.1, 0.2 )-0.1;\n"
-"}\n"
-"\n"
-"vec3 apply_fog( vec3 vfrag, float fdist )\n"
-"{\n"
-"   float dist = pow(fdist*0.0008,1.2);\n"
-"   return mix( vfrag, vec3(0.55,0.76,1.0), min( 1.0, dist ) );\n"
-"}\n"
-"\n"
-"\n"
-"// New lighting model\n"
-"\n"
-"vec3 newlight_compute_ambient()\n"
-"{\n"
-"   return g_ambient_colour.rgb;\n"
+"   return clamp( fdelta, 0.2, 0.4 )-0.2;\n"
 "}\n"
 "\n"
 "float newlight_compute_sun_shadow( vec3 dir )\n"
@@ -148,264 +226,186 @@ static struct vg_shader _shader_model_sky = {
 "      return 1.0;\n"
 "   }\n"
 "\n"
-"   float fspread = g_light_colours[0].w;\n"
-"   vec3  vdir = dir;\n"
-"   float flength = g_light_directions[0].w;\n"
+"   float fspread = g_shadow_spread;\n"
+"   float flength = g_shadow_length;\n"
 "\n"
 "   float famt = 0.0;\n"
-"   famt+=shadow_sample((vdir+vec3(-0.563, 0.550, 0.307)*fspread)*flength*0.1);\n"
-"   famt+=shadow_sample((vdir+vec3( 0.808, 0.686, 0.346)*fspread)*flength*0.2);\n"
-"   famt+=shadow_sample((vdir+vec3( 0.787, 0.074,-0.065)*fspread)*flength*0.3);\n"
-"   famt+=shadow_sample((vdir+vec3(-0.593, 0.071,-0.425)*fspread)*flength*0.4);\n"
-"   famt+=shadow_sample((vdir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
-"   famt+=shadow_sample((vdir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
-"   famt+=shadow_sample((vdir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
-"   famt+=shadow_sample((vdir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
+"   famt += shadow_sample((dir+vec3(-0.56,0.55, 0.30)*fspread)*flength*0.1);\n"
+"   famt += shadow_sample((dir+vec3( 0.80,0.68, 0.34)*fspread)*flength*0.2);\n"
+"   famt += shadow_sample((dir+vec3( 0.78,0.07,-0.06)*fspread)*flength*0.3);\n"
+"   famt += shadow_sample((dir+vec3(-0.59,0.07,-0.42)*fspread)*flength*0.4);\n"
+"\n"
+"   //famt+=shadow_sample((dir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
+"   //famt+=shadow_sample((dir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
+"   //famt+=shadow_sample((dir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
+"   //famt+=shadow_sample((dir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
 "\n"
 "   return 1.0 - famt;\n"
 "}\n"
 "\n"
-"vec3 newlight_compute_world_diffuse( vec3 wnormal )\n"
+"float newlight_specular( vec3 wnormal, vec3 dir, vec3 halfview, float exponent )\n"
 "{\n"
-"   vec3 vtotal = g_ambient_colour.rgb;\n"
-"\n"
-"   for( int i=0; i<g_light_count; i++ )\n"
-"   {\n"
-"      vec3 vcolour = g_light_colours[i].rgb;\n"
-"      vec3 vdir = g_light_directions[i].xyz;\n"
-"\n"
-"      float flight = max(dot( vdir, wnormal )*0.75+0.25,0.0);\n"
-"      vtotal += vcolour*flight;\n"
-"   }\n"
-"\n"
-"   return vtotal;\n"
+"   vec3 specdir = reflect( -dir, wnormal );\n"
+"   return pow(max(dot( halfview, specdir ), 0.0), exponent);\n"
 "}\n"
 "\n"
-"vec3 newlight_compute_sun_spec( vec3 wnormal, vec3 halfview, float fintensity )\n"
+"vec3 scene_apply_fog( vec3 vfrag, vec3 colour, float fdist )\n"
 "{\n"
-"   vec3 vcolour = g_light_colours[0].rgb;\n"
-"   vec3 vdir = g_light_directions[0].xyz;\n"
-"\n"
-"   vec3 specdir = reflect( -vdir, wnormal );\n"
-"   float spec = pow(max(dot( halfview, specdir ), 0.0), 10.0);\n"
-"   return vcolour*spec*fintensity;\n"
+"   float dist = pow(fdist*0.0010,0.78);\n"
+"   return mix( vfrag, colour, min( 1.0, dist ) );\n"
 "}\n"
 "\n"
-"float newlight_specular( vec3 wnormal, vec3 dir, vec3 halfview, float exponent )\n"
+"vec3 rand33(vec3 p3)\n"
 "{\n"
-"   vec3 specdir = reflect( -dir, wnormal );\n"
-"   return pow(max(dot( halfview, specdir ), 0.0), exponent);\n"
+"	p3 = fract(p3 * vec3(.1031, .1030, .0973));\n"
+"   p3 += dot(p3, p3.yxz+33.33);\n"
+"   return fract((p3.xxy + p3.yxx)*p3.zyx);\n"
 "}\n"
 "\n"
-"vec3 newlight_compute_quadratic( vec3 wnormal, float max_dist,\n"
-"                                 vec3 light_colour, vec3 light_pos )\n"
+"vec3 scene_calculate_light( int light_index, \n"
+"                            vec3 halfview, vec3 co, vec3 normal )\n"
 "{\n"
-"   vec3 light_delta = light_pos-aWorldCo;\n"
+"   vec4 light_colour = texelFetch( uLightsArray, light_index+0 );\n"
+"   vec4 light_co     = texelFetch( uLightsArray, light_index+1 );\n"
+"   vec4 light_dir    = texelFetch( uLightsArray, light_index+2 );\n"
 "\n"
+"   vec3 light_delta = light_co.xyz-co;\n"
 "   float dist2 = dot(light_delta,light_delta);\n"
 "\n"
+"   light_delta = normalize( light_delta );\n"
+"\n"
 "   float quadratic = dist2*100.0;\n"
 "   float attenuation  = 1.0f/( 1.0f + quadratic );\n"
-"         attenuation *= max( dot( normalize(light_delta), wnormal ), 0.0 );\n"
+"         attenuation *= max( dot( light_delta, normal ), 0.0 );\n"
+"\n"
+"   float falloff = max( 0.0, 1.0-(dist2*light_co.w) );\n"
+"\n"
+"   if( light_dir.w < 0.999999 )\n"
+"   {\n"
+"      float spot_theta = max( 0.0, dot( light_delta, -light_dir.xyz ) );\n"
+"      falloff *= max( 0.0, (spot_theta - light_dir.w) / (1.0-light_dir.w) );\n"
+"   }\n"
 "\n"
-"   float falloff = max( 0.0, 1.0-(dist2*max_dist) );\n"
-"   return light_colour * attenuation * falloff;\n"
+"   return light_colour.rgb * attenuation * falloff;\n"
 "}\n"
 "\n"
-"vec3 newlight_compute_spot( vec3 wnormal, vec3 halfview, \n"
-"                            vec3 light_colour, vec3 light_pos,\n"
-"                            vec4 light_dir )\n"
+"vec3 scene_calculate_packed_light_patch( uint packed_index, \n"
+"                                         vec3 halfview, vec3 co, vec3 normal )\n"
 "{\n"
-"   vec3 light_delta = (light_pos-aWorldCo) * 10.0;\n"
+"   uint light_count = packed_index & 0x3u;\n"
 "\n"
-"   float quadratic = dot(light_delta,light_delta);\n"
-"   float attenuation = 1.0f/( 1.0f + quadratic );\n"
+"   vec3 l = vec3(0.0);\n"
 "\n"
-"   light_delta = normalize( light_delta );\n"
-"   attenuation *= max( 0.0, dot( light_delta, wnormal ) );\n"
+"   if( light_count >= 1u )\n"
+"   {\n"
+"      int index_0 = int( ((packed_index >>  2u) & 0x3ffu) * 3u );\n"
+"      int index_1 = int( ((packed_index >> 12u) & 0x3ffu) * 3u );\n"
+"      int index_2 = int( ((packed_index >> 22u) & 0x3ffu) * 3u );\n"
 "\n"
-"   float spot_theta = max( 0.0, dot( light_delta, -light_dir.xyz ) ),\n"
-"            falloff = max( 0.0,( spot_theta - light_dir.w ) / (1.0-light_dir.w) );\n"
+"      l += scene_calculate_light( index_0, halfview, co, normal );\n"
 "\n"
-"   return light_colour*attenuation*falloff;\n"
-"}\n"
+"      if( light_count >= 2u )\n"
+"      {\n"
+"         l += scene_calculate_light( index_1, halfview, co, normal );\n"
 "\n"
-"#line     10        0 \n"
-"#line       1        2 \n"
-"const float k_motion_lerp_amount = 0.01;\n"
-"\n"
-"#line      2        0 \n"
-"\n"
-"layout (location = 1) out vec2 oMotionVec;\n"
+"         if( light_count >= 3u )\n"
+"         {\n"
+"            l += scene_calculate_light( index_2, halfview, co, normal );\n"
+"         }\n"
+"      }\n"
+"   }\n"
 "\n"
-"in vec3 aMotionVec0;\n"
-"in vec3 aMotionVec1;\n"
+"   return l;\n"
+"}\n"
 "\n"
-"void compute_motion_vectors()\n"
+"vec3 world_compute_lighting( vec3 diffuse, vec3 normal, vec3 co,\n"
+"                             float light_mask )\n"
 "{\n"
-"   // Write motion vectors\n"
-"   vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
-"   vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
+"   if( g_light_preview == 1 )\n"
+"      diffuse = vec3(0.75);\n"
 "\n"
-"   oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
-"}\n"
+"   // Lighting\n"
+"   vec3 halfview = uCamera - co;\n"
+"   float fdist = length(halfview);\n"
+"   halfview /= fdist;\n"
 "\n"
-"#line     11        0 \n"
-"#line       1        3 \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 ) * 1.125;\n"
+"   float world_shadow = newlight_compute_sun_shadow( g_sun_dir.xyz \n"
+"                                    * (1.0/(max(g_sun_dir.y,0.0)+0.2)) );\n"
 "\n"
-"const float SUN_ANGLE       = 0.0001;\n"
-"const float TIME_RATE       = 0.025;\n"
+"   vec3 total_light = clearskies_lighting( \n"
+"                           normal, min( light_mask, world_shadow ), halfview );\n"
 "\n"
-"const float PI              = 3.14159265;\n"
+"   vec3 cube_coord = (co - g_cube_min.xyz) * g_cube_inv_range.xyz;\n"
+"        cube_coord = floor( cube_coord );\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"
+"   if( g_debug_indices == 1 )\n"
+"   {\n"
+"      return rand33(cube_coord);\n"
+"   }\n"
 "\n"
-"float luminance( vec3 v )\n"
-"{\n"
-"   return dot( v, vec3(0.2126, 0.7152, 0.0722) );\n"
-"}\n"
+"   if( g_debug_complexity == 1 )\n"
+"   {\n"
+"      ivec3 coord = ivec3( cube_coord );\n"
+"      uvec4 index_sample = texelFetch( uLightsIndex, coord, 0 );\n"
 "\n"
-"vec3 scene_ambient( vec3 dir, const world_info w )\n"
-"{\n"
-"   float sun_azimuth  = dot( dir.xz, w.sun_dir.xz ) * 0.4 + 0.6;\n"
-"   float sky_gradient = dir.y;\n"
-"   \n"
-"   /* Blend phase colours */\n"
-"   vec3 ambient  = DAYSKY_COLOUR   * (w.day_phase-w.sunset_phase*0.1);\n"
-"        ambient += SUNSET_COLOUR   * (1.0-dir.y*0.5) * w.sunset_phase * sun_azimuth;\n"
-"        ambient += NIGHTSKY_COLOUR * (1.0-w.day_phase);\n"
-"   \n"
-"   /* Add gradient */\n"
-"        ambient -= sky_gradient * luminance(ambient);\n"
-"        \n"
-"   return ambient;\n"
-"}\n"
+"      uint light_count = (index_sample.x & 0x3u) + (index_sample.y & 0x3u);\n"
+"      return vec3( float(light_count)*(1.0/6.0), 0.0, 0.5 );\n"
+"   }\n"
 "\n"
-"vec3 scene_sky( vec3 ray_dir, const world_info w )\n"
-"{\n"
-"   ray_dir.y = abs( ray_dir.y );\n"
-"   vec3 sky_colour  = scene_ambient( ray_dir, w );\n"
+"   // FIXME: this coord should absolutely must be clamped!\n"
 "   \n"
-"   /* Sun */\n"
-"   float sun_theta  = dot( ray_dir, w.sun_dir );\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(w.sun_dir.y,0.0) * 0.5;\n"
+"   ivec3 coord = ivec3( cube_coord );\n"
+"   uvec4 index_sample = texelFetch( uLightsIndex, coord, 0 );\n"
+"\n"
+"   total_light += \n"
+"      scene_calculate_packed_light_patch( index_sample.x,\n"
+"                                          halfview, co, normal ) \n"
+"                                          * light_mask;\n"
+"   total_light += \n"
+"      scene_calculate_packed_light_patch( index_sample.y,\n"
+"                                          halfview, co, normal )\n"
+"                                          * light_mask;\n"
+"\n"
+"   // Take a section of the sky function to give us a matching fog colour\n"
+"\n"
+"   vec3 fog_colour  = clearskies_ambient( -halfview );\n"
+"   float sun_theta  = dot( -halfview, g_sun_dir.xyz );\n"
+"   float sun_size   = max( 0.0, sun_theta * 0.5 + 0.5 );\n"
+"   float sun_shape  = sun_size * max(g_sun_dir.y,0.0) * 0.5;\n"
 "         \n"
-"   vec3 sun_colour  = mix( vec3(1.0), SUNSET_COLOUR, w.sunset_phase*0.5 );\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 scene_compute_ambient( vec3 normal, const world_info w )\n"
-"{\n"
-"   return scene_ambient( (normal * vec3(1.0,-1.0,1.0)) * 0.5 + 0.5, w );\n"
-"}\n"
 "\n"
-"vec3 SR_LIGHT( vec3 normal, vec2 dir, vec3 colour )\n"
-"{\n"
-"   vec3 dir3 = vec3\n"
-"   (\n"
-"      cos(dir.y) * cos(dir.x),\n"
-"                   sin(dir.x),\n"
-"      sin(dir.y) * cos(dir.x)\n"
-"   );\n"
-"\n"
-"   float flight = max( dot( normal, dir3 ) * 0.75 + 0.25, 0.0 );\n"
-"   \n"
-"   return flight * colour;\n"
-"}\n"
-"\n"
-"vec3 scene_lighting_old( vec3 normal, const world_info w )\n"
-"{\n"
-"   vec3 SR_COLOUR_SUN  = vec3( 1.36,  1.35, 1.01 );\n"
-"   vec3 SR_COLOUR_FILL = vec3( 0.33,  0.56, 0.64 );\n"
-"   vec3 SR_COLOUR_RIM  = vec3( 0.05,  0.05, 0.23 );\n"
-"   \n"
-"   return SR_LIGHT( normal, vec2(  0.63, -0.08 ), SR_COLOUR_SUN ) +\n"
-"          SR_LIGHT( normal, vec2( -2.60, -0.13 ), SR_COLOUR_FILL ) + \n"
-"          SR_LIGHT( normal, vec2(  2.60, -0.84 ), SR_COLOUR_RIM ) ;\n"
+"   fog_colour += sun_colour;\n"
+"   return scene_apply_fog( diffuse * total_light, fog_colour, fdist );\n"
 "}\n"
 "\n"
-"vec3 scene_lighting( vec3 normal, float shadow, vec3 halfview, const world_info w )\n"
-"{\n"
-"   float fresnel = 1.0 - abs(dot(normal,halfview));\n"
-"\n"
-"   vec3  sky_reflection = 0.5 * fresnel * mix( DAYSKY_COLOUR, SUNSET_COLOUR, w.sunset_phase );\n"
-"   vec3  light_sun      = max(0.0,dot(normal,w.sun_dir)*0.75+0.25) * SUN_COLOUR \n"
-"                           * w.day_phase;\n"
-"\n"
-"   float scaled_shadow = max( shadow, 1.0 - max(w.sun_dir.y,0.0) );\n"
-"\n"
-"   vec3 ambient = mix( AMBIENT_COLOUR, SUNSET_AMBIENT, w.sunset_phase );\n"
-"\n"
-"   return ambient + (light_sun + sky_reflection) * shadow;\n"
-"\n"
-"\n"
-"\n"
-"\n"
+"#line     13        0 \n"
+"#line       1        2 \n"
+"const float k_motion_lerp_amount = 0.01;\n"
 "\n"
+"#line      2        0 \n"
 "\n"
-"   float  sun_theta = dot( normal, w.sun_dir );\n"
+"layout (location = 1) out vec2 oMotionVec;\n"
 "\n"
-"   float  softness_min = 0.5;\n"
-"   float  softness     = softness_min + w.sunset_phase * (1.0-softness_min);\n"
-"   float  light_min    = 0.0 * w.day_phase;\n"
-"   float  light_direct = light_min + smoothstep( -softness, softness, sun_theta ) * (1.0-light_min);\n"
-"          light_direct *= clamp(w.sun_dir.y * 4.0 + 1.0,0.0,1.0) * shadow;\n"
-"   \n"
-"   float  light_bounce  = 0.5 + 0.5 * dot( -normal, w.sun_dir );\n"
-"          light_bounce *= light_bounce * max( w.sun_dir.y, 0.0 );\n"
-"          \n"
-"   vec3   light_colour = SUN_COLOUR*w.day_phase + (SUNSET_COLOUR*w.sunset_phase + 0.1);\n"
-"   vec3   dark_colour  = mix( AMBIENT_COLOUR, SUNSET_AMBIENT, w.sunset_phase );\n"
-"   \n"
-"   float  spec         = newlight_specular( normal, w.sun_dir, halfview, 2.0 ) \n"
-"                            * 0.2 * shadow * w.day_phase;\n"
-"   \n"
-"   return mix(dark_colour, light_colour, light_direct) + \n"
-"              spec +\n"
-"              dark_colour * light_bounce;\n"
-"}\n"
+"in vec3 aMotionVec0;\n"
+"in vec3 aMotionVec1;\n"
 "\n"
-"void scene_state( float world_time, out world_info w )\n"
+"void compute_motion_vectors()\n"
 "{\n"
-"   w.time         = world_time;\n"
-"   w.time_of_day  = fract( w.time );\n"
-"   w.day_phase    = cos( w.time_of_day * PI * 2.0 )      * 0.5 + 0.5;\n"
-"   w.sunset_phase = cos( w.time_of_day * PI * 4.0 + PI ) * 0.5 + 0.5;\n"
-"   w.sunset_phase = pow( w.sunset_phase, 6.0 );\n"
-"   \n"
-"   float a        = w.time_of_day * PI * 2.0;\n"
-"   w.sun_dir      = normalize( vec3( sin( a ), cos( a ), 0.2) );\n"
-"}\n"
+"   // Write motion vectors\n"
+"   vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
+"   vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
 "\n"
+"   oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
+"}\n"
 "\n"
-"#line     12        0 \n"
+"#line     14        0 \n"
 "\n"
 "void main()\n"
 "{\n"
 "   compute_motion_vectors();\n"
 "\n"
-"   world_info world;\n"
-"   scene_state( g_time, world );\n"
-"\n"
 "   vec3 rd = normalize(aNorm);\n"
 "\n"
 "   float fmove = g_time * 0.004;\n"
@@ -416,10 +416,11 @@ static struct vg_shader _shader_model_sky = {
 "   float cloud_d = max(clouds1.b*clouds2.r -0.2 - clouds2.g*0.4,0.0);\n"
 "   float cloud_e = pow(cloud_d,1.5)*pow(abs(rd.y),0.3)*2.0;\n"
 "\n"
-"   oColour = vec4( scene_sky( -rd, world ) ,1.0);\n"
+"   oColour = vec4( clearskies_sky( -rd ) ,1.0);\n"
+"\n"
+"   vec3 cloud_colour = mix( mix(g_nightsky_colour.rgb,vec3(1.0),g_day_phase), \n"
+"                                g_sunset_colour.rgb, g_sunset_phase );\n"
 "\n"
-"   vec3 cloud_colour    = mix( mix(NIGHTSKY_COLOUR,vec3(1.0),world.day_phase), \n"
-"                                    SUNSET_COLOUR, world.sunset_phase );\n"
 "   oColour.rgb = mix( oColour.rgb, cloud_colour, cloud_e );\n"
 "}\n"
 ""},
@@ -430,6 +431,8 @@ static GLuint _uniform_model_sky_uPv;
 static GLuint _uniform_model_sky_uPvmPrev;
 static GLuint _uniform_model_sky_uTexGarbage;
 static GLuint _uniform_model_sky_g_world_depth;
+static GLuint _uniform_model_sky_uLightsArray;
+static GLuint _uniform_model_sky_uLightsIndex;
 static void shader_model_sky_uMdl(m4x3f m){
    glUniformMatrix4x3fv(_uniform_model_sky_uMdl,1,GL_FALSE,(float*)m);
 }
@@ -455,5 +458,7 @@ static void shader_model_sky_link(void){
    _uniform_model_sky_uPvmPrev = glGetUniformLocation( _shader_model_sky.id, "uPvmPrev" );
    _uniform_model_sky_uTexGarbage = glGetUniformLocation( _shader_model_sky.id, "uTexGarbage" );
    _uniform_model_sky_g_world_depth = glGetUniformLocation( _shader_model_sky.id, "g_world_depth" );
+   _uniform_model_sky_uLightsArray = glGetUniformLocation( _shader_model_sky.id, "uLightsArray" );
+   _uniform_model_sky_uLightsIndex = glGetUniformLocation( _shader_model_sky.id, "uLightsIndex" );
 }
 #endif /* SHADER_model_sky_H */