grid based

[carveJwlIkooP6JGAAIwe30JlM.git] / shaders / scene_water.h

#ifndef SHADER_scene_water_H
#define SHADER_scene_water_H
static void shader_scene_water_link(void);
static void shader_scene_water_register(void);
static struct vg_shader _shader_scene_water = {
   .name = "scene_water",
   .link = shader_scene_water_link,
   .vs = 
{
.orig_file = "shaders/scene.vs",
.static_src = 
"layout (location=0) in vec3  a_co;\n"
"layout (location=1) in vec4  a_norm;\n"
"layout (location=2) in vec2  a_uv;\n"
"layout (location=3) in ivec4 a_lights;\n"
"\n"
"#line       1        1 \n"
"const float k_motion_lerp_amount = 0.01;\n"
"\n"
"#line      2        0 \n"
"\n"
"out vec3 aMotionVec0;\n"
"out vec3 aMotionVec1;\n"
"\n"
"void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
"{\n"
"   // This magically solves some artifacting errors!\n"
"   //\n"
"   vproj1 = vproj0*(1.0-k_motion_lerp_amount) + vproj1*k_motion_lerp_amount;\n"
"\n"
"   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
"   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
"}\n"
"\n"
"#line      7        0 \n"
"\n"
"uniform mat4x3 uMdl;\n"
"uniform mat4   uPv;\n"
"uniform mat4   uPvmPrev;\n"
"\n"
"out vec2 aUv;\n"
"out vec4 aNorm;\n"
"out vec3 aCo;\n"
"out vec3 aWorldCo;\n"
"\n"
"flat out ivec4 light_indices;\n"
"\n"
"void main()\n"
"{\n"
"   vec3 world_pos0 = uMdl     * vec4( a_co, 1.0 );\n"
"   vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );\n"
"   vec4 vproj1     = uPvmPrev * vec4( a_co, 1.0 );\n"
"\n"
"   vs_motion_out( vproj0, vproj1 );\n"
"\n"
"   gl_Position = vproj0;\n"
"\n"
"   aUv = a_uv;\n"
"   aNorm = vec4( mat3(uMdl) * a_norm.xyz, a_norm.w );\n"
"   aCo = a_co;\n"
"   aWorldCo = world_pos0;\n"
"\n"
"   light_indices = a_lights;\n"
"}\n"
""},
   .fs = 
{
.orig_file = "shaders/scene_water.fs",
.static_src = 
"uniform sampler2D uTexMain;\n"
"uniform sampler2D uTexDudv;\n"
"uniform sampler2D uTexBack;\n"
"\n"
"uniform vec2 uInvRes;\n"
"uniform float uTime;\n"
"uniform vec3 uCamera;\n"
"uniform float uSurfaceY;\n"
"uniform vec3 uBoard0;\n"
"uniform vec3 uBoard1;\n"
"\n"
"uniform vec3 uShoreColour;\n"
"uniform vec3 uOceanColour;\n"
"\n"
"#line       1        1 \n"
"// :D\n"
"\n"
"in vec2 aUv;\n"
"in vec4 aNorm;\n"
"in vec3 aCo;\n"
"in vec3 aWorldCo;\n"
"flat in ivec4 light_indices;\n"
"\n"
"uniform samplerBuffer uLightsArray;\n"
"uniform usampler3D uLightsIndex;\n"
"\n"
"#line       1        1 \n"
"layout (location = 0) out vec4 oColour;\n"
"\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"
"   float g_water_fog;\n"
"   float g_time;\n"
"   int g_light_count;\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"
"\n"
"float world_depth_sample( vec3 pos )\n"
"{\n"
"   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
"   return texture( g_world_depth, depth_coord ).r;\n"
"}\n"
"\n"
"float world_water_depth( vec3 pos )\n"
"{\n"
"   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
"   float ref_depth = g_water_plane.y*g_water_plane.w;\n"
"   return texture( g_world_depth, depth_coord ).g - ref_depth;\n"
"}\n"
"\n"
"float shadow_sample( vec3 vdir )\n"
"{\n"
"   vec3 sample_pos = aWorldCo + vdir;\n"
"   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"
"}\n"
"\n"
"float newlight_compute_sun_shadow( vec3 dir )\n"
"{\n"
"   if( g_shadow_samples == 0 )\n"
"   {\n"
"      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"
"\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"
"\n"
"   return 1.0 - famt;\n"
"}\n"
"\n"
"vec3 newlight_compute_world_diffuse( vec3 wnormal )\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"
"}\n"
"\n"
"vec3 newlight_compute_sun_spec( vec3 wnormal, vec3 halfview, float fintensity )\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"
"}\n"
"\n"
"float newlight_specular( vec3 wnormal, vec3 dir, vec3 halfview, float exponent )\n"
"{\n"
"   vec3 specdir = reflect( -dir, wnormal );\n"
"   return pow(max(dot( halfview, specdir ), 0.0), exponent);\n"
"}\n"
"\n"
"vec3 newlight_compute_quadratic( vec3 wnormal, float max_dist,\n"
"                                 vec3 light_colour, vec3 light_pos )\n"
"{\n"
"   vec3 light_delta = light_pos-aWorldCo;\n"
"\n"
"   float dist2 = dot(light_delta,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"
"\n"
"   float falloff = max( 0.0, 1.0-(dist2*max_dist) );\n"
"   return light_colour * 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"
"{\n"
"   vec3 light_delta = (light_pos-aWorldCo) * 10.0;\n"
"\n"
"   float quadratic = dot(light_delta,light_delta);\n"
"   float attenuation = 1.0f/( 1.0f + quadratic );\n"
"\n"
"   light_delta = normalize( light_delta );\n"
"   attenuation *= max( 0.0, dot( light_delta, wnormal ) );\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"
"   return light_colour*attenuation*falloff;\n"
"}\n"
"\n"
"#line     13        0 \n"
"#line       1        2 \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"
"\n"
"const float SUN_ANGLE       = 0.0001;\n"
"const float TIME_RATE       = 0.025;\n"
"\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 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"
"\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"
"   \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"
"         \n"
"   vec3 sun_colour  = mix( vec3(1.0), SUNSET_COLOUR, w.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"
"}\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"
"\n"
"\n"
"   float  sun_theta = dot( normal, w.sun_dir );\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"
"\n"
"void scene_state( float world_time, out world_info w )\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"
"\n"
"\n"
"#line     14        0 \n"
"\n"
"float sdLine( vec3 p, vec3 a, vec3 b )\n"
"{\n"
"  vec3 pa = p - a;\n"
"  vec3 ba = b - a;\n"
"\n"
"  float h = clamp( dot(pa,ba)/dot(ba,ba), 0.0, 1.0 );\n"
"  return length( pa - ba*h );\n"
"}\n"
"\n"
"float compute_board_shadow()\n"
"{\n"
"   // player shadow\n"
"   float dist_to_player = max( 0.0, sdLine( aWorldCo, uBoard0, uBoard1 )-0.1 );\n"
"   float player_shadow = max( 1.0-dist_to_player*2.7, 0.0 );\n"
"   player_shadow *= player_shadow*player_shadow*player_shadow;\n"
"\n"
"   return 1.0 - player_shadow*0.8;\n"
"}\n"
"\n"
"vec3 scene_apply_fog( vec3 vfrag, vec3 colour, float fdist )\n"
"{\n"
"   float dist = pow(fdist*0.0010,0.78);\n"
"   return mix( vfrag, colour, min( 1.0, dist ) );\n"
"}\n"
"\n"
"vec3 rand33(vec3 p3)\n"
"{\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 scene_calculate_light( int light_index, \n"
"                            vec3 halfview, vec3 co, vec3 normal )\n"
"{\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( 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"
"   return light_colour.rgb * attenuation * falloff;\n"
"}\n"
"\n"
"vec3 scene_calculate_packed_light_patch( uint packed_index, \n"
"                                         vec3 halfview, vec3 co, vec3 normal )\n"
"{\n"
"   uint light_count = packed_index & 0x3u;\n"
"\n"
"   vec3 l = vec3(0.0);\n"
"\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"
"      l += scene_calculate_light( index_0, halfview, co, normal );\n"
"\n"
"      if( light_count >= 2u )\n"
"      {\n"
"         l += scene_calculate_light( index_1, halfview, co, normal );\n"
"\n"
"         if( light_count >= 3u )\n"
"         {\n"
"            l += scene_calculate_light( index_2, halfview, co, normal );\n"
"         }\n"
"      }\n"
"   }\n"
"\n"
"   return l;\n"
"}\n"
"\n"
"vec3 scene_do_lighting( vec3 diffuse, vec3 wnormal )\n"
"{\n"
"   world_info world;\n"
"   scene_state( g_time, world );\n"
"\n"
"   // Lighting\n"
"   vec3 halfview = uCamera - aWorldCo;\n"
"   float fdist = length(halfview);\n"
"   halfview /= fdist;\n"
"\n"
"   vec3 total_light = vec3(0.0);\n"
"   float world_shadow = newlight_compute_sun_shadow( world.sun_dir \n"
"                                    * (1.0/(max(world.sun_dir.y,0.0)+0.2)) );\n"
"   float board_shadow = compute_board_shadow();\n"
"\n"
"   total_light += scene_lighting( wnormal, min( board_shadow, world_shadow ), \n"
"                                  halfview, world );\n"
"\n"
"   vec3 cube_coord = (aWorldCo - g_cube_min.xyz) * g_cube_inv_range.xyz;\n"
"        cube_coord = floor( cube_coord );\n"
"\n"
"   if( g_debug_indices == 1 )\n"
"   {\n"
"      return rand33(cube_coord);\n"
"   }\n"
"\n"
"   if( g_debug_complexity == 1 )\n"
"   {\n"
"      ivec3 coord = ivec3( cube_coord );\n"
"      uvec4 index_sample = texelFetch( uLightsIndex, coord, 0 );\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"
"   // FIXME: this should absolutely must be clamped!\n"
"   \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, aWorldCo, wnormal ) \n"
"                                          * board_shadow;\n"
"   total_light += \n"
"      scene_calculate_packed_light_patch( index_sample.y,\n"
"                                          halfview, aWorldCo, wnormal )\n"
"                                          * board_shadow;\n"
"\n"
"   vec3 fog_colour = scene_sky( -halfview, world );\n"
"   return scene_apply_fog( diffuse * total_light, fog_colour, fdist );\n"
"}\n"
"\n"
"#line     16        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"
"\n"
"in vec3 aMotionVec0;\n"
"in vec3 aMotionVec1;\n"
"\n"
"void compute_motion_vectors()\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     17        0 \n"
"\n"
"vec4 water_surf( vec3 halfview, vec3 vnorm, float depthvalue, \n"
"                 vec4 beneath, vec4 above )\n"
"{\n"
"   vec3 surface_tint = mix(uShoreColour, uOceanColour, depthvalue);\n"
"\n"
"   float ffresnel = pow(1.0-dot( vnorm, halfview ),5.0);\n"
"\n"
"   vec3 lightdir = vec3(0.95,0.0,-0.3);\n"
"   vec3 specdir = reflect( -lightdir, vnorm );\n"
"   float spec = pow(max(dot(halfview,specdir),0.0),20.0)*0.3;\n"
"   \n"
"   // Depth \n"
"   float depthblend = pow( beneath.r, 0.8 );\n"
"\n"
"   // Composite\n"
"   vec3 vsurface = mix(surface_tint, above.rgb, ffresnel );\n"
"   //vsurface += spec;\n"
"\n"
"   return vec4( vsurface,depthblend );\n"
"}\n"
"\n"
"void main()\n"
"{\n"
"   compute_motion_vectors();\n"
"\n"
"   // Create texture coords\n"
"   vec2 ssuv = gl_FragCoord.xy*uInvRes;\n"
"   \n"
"   // Surface colour composite\n"
"   float depthvalue = clamp( -world_water_depth( aCo )*(1.0/25.0), 0.0, 1.0 );\n"
"\n"
"   vec2 world_coord = aCo.xz * 0.008;\n"
"   vec4 time_offsets = vec4( uTime ) * vec4( 0.008, 0.006, 0.003, 0.03 );\n"
"   vec4 dudva = texture( uTexDudv, world_coord + time_offsets.xy )-0.5;\n"
"   vec4 dudvb = texture( uTexDudv, world_coord *7.0 - time_offsets.zw )-0.5;\n"
"\n"
"   vec3 surfnorm = dudva.rgb + dudvb.rgb;\n"
"   surfnorm = normalize(vec3(0.0,1.0,0.0) + dudva.xyz*0.4 + dudvb.xyz*0.1);\n"
"   \n"
"   // Foam\n"
"   float fband = fract( aCo.z*0.02+uTime*0.1+depthvalue*10.0 );\n"
"   fband = step( fband+dudva.a*0.8, 0.3 ) * max((1.0-depthvalue*4.0),0.0);\n"
"\n"
"   // Lighting\n"
"   vec3 halfview = -normalize( aCo-uCamera );\n"
"\n"
"   // Sample textures\n"
"   vec4 above = texture( uTexMain, ssuv+ surfnorm.xz*0.2 );\n"
"   vec4 beneath = texture( uTexBack, ssuv );\n"
"\n"
"   // Fog\n"
"   float fdist = pow(length( aCo.xz-uCamera.xz ) * 0.00047, 2.6);\n"
"\n"
"   // Composite\n"
"   vec4 vsurface = water_surf( halfview, surfnorm, depthvalue, beneath, above );\n"
"   vsurface.a -= fdist;\n"
"   oColour = mix( vsurface, vec4(1.0,1.0,1.0,0.5), fband );\n"
"   oColour.rgb = scene_do_lighting( oColour.rgb, aNorm.xyz );\n"
"}\n"
""},
};

static GLuint _uniform_scene_water_uMdl;
static GLuint _uniform_scene_water_uPv;
static GLuint _uniform_scene_water_uPvmPrev;
static GLuint _uniform_scene_water_uTexMain;
static GLuint _uniform_scene_water_uTexDudv;
static GLuint _uniform_scene_water_uTexBack;
static GLuint _uniform_scene_water_uInvRes;
static GLuint _uniform_scene_water_uTime;
static GLuint _uniform_scene_water_uCamera;
static GLuint _uniform_scene_water_uSurfaceY;
static GLuint _uniform_scene_water_uBoard0;
static GLuint _uniform_scene_water_uBoard1;
static GLuint _uniform_scene_water_uShoreColour;
static GLuint _uniform_scene_water_uOceanColour;
static GLuint _uniform_scene_water_uLightsArray;
static GLuint _uniform_scene_water_uLightsIndex;
static GLuint _uniform_scene_water_g_world_depth;
static void shader_scene_water_uMdl(m4x3f m){
   glUniformMatrix4x3fv(_uniform_scene_water_uMdl,1,GL_FALSE,(float*)m);
}
static void shader_scene_water_uPv(m4x4f m){
   glUniformMatrix4fv(_uniform_scene_water_uPv,1,GL_FALSE,(float*)m);
}
static void shader_scene_water_uPvmPrev(m4x4f m){
   glUniformMatrix4fv(_uniform_scene_water_uPvmPrev,1,GL_FALSE,(float*)m);
}
static void shader_scene_water_uTexMain(int i){
   glUniform1i(_uniform_scene_water_uTexMain,i);
}
static void shader_scene_water_uTexDudv(int i){
   glUniform1i(_uniform_scene_water_uTexDudv,i);
}
static void shader_scene_water_uTexBack(int i){
   glUniform1i(_uniform_scene_water_uTexBack,i);
}
static void shader_scene_water_uInvRes(v2f v){
   glUniform2fv(_uniform_scene_water_uInvRes,1,v);
}
static void shader_scene_water_uTime(float f){
   glUniform1f(_uniform_scene_water_uTime,f);
}
static void shader_scene_water_uCamera(v3f v){
   glUniform3fv(_uniform_scene_water_uCamera,1,v);
}
static void shader_scene_water_uSurfaceY(float f){
   glUniform1f(_uniform_scene_water_uSurfaceY,f);
}
static void shader_scene_water_uBoard0(v3f v){
   glUniform3fv(_uniform_scene_water_uBoard0,1,v);
}
static void shader_scene_water_uBoard1(v3f v){
   glUniform3fv(_uniform_scene_water_uBoard1,1,v);
}
static void shader_scene_water_uShoreColour(v3f v){
   glUniform3fv(_uniform_scene_water_uShoreColour,1,v);
}
static void shader_scene_water_uOceanColour(v3f v){
   glUniform3fv(_uniform_scene_water_uOceanColour,1,v);
}
static void shader_scene_water_g_world_depth(int i){
   glUniform1i(_uniform_scene_water_g_world_depth,i);
}
static void shader_scene_water_register(void){
   vg_shader_register( &_shader_scene_water );
}
static void shader_scene_water_use(void){ glUseProgram(_shader_scene_water.id); }
static void shader_scene_water_link(void){
   _uniform_scene_water_uMdl = glGetUniformLocation( _shader_scene_water.id, "uMdl" );
   _uniform_scene_water_uPv = glGetUniformLocation( _shader_scene_water.id, "uPv" );
   _uniform_scene_water_uPvmPrev = glGetUniformLocation( _shader_scene_water.id, "uPvmPrev" );
   _uniform_scene_water_uTexMain = glGetUniformLocation( _shader_scene_water.id, "uTexMain" );
   _uniform_scene_water_uTexDudv = glGetUniformLocation( _shader_scene_water.id, "uTexDudv" );
   _uniform_scene_water_uTexBack = glGetUniformLocation( _shader_scene_water.id, "uTexBack" );
   _uniform_scene_water_uInvRes = glGetUniformLocation( _shader_scene_water.id, "uInvRes" );
   _uniform_scene_water_uTime = glGetUniformLocation( _shader_scene_water.id, "uTime" );
   _uniform_scene_water_uCamera = glGetUniformLocation( _shader_scene_water.id, "uCamera" );
   _uniform_scene_water_uSurfaceY = glGetUniformLocation( _shader_scene_water.id, "uSurfaceY" );
   _uniform_scene_water_uBoard0 = glGetUniformLocation( _shader_scene_water.id, "uBoard0" );
   _uniform_scene_water_uBoard1 = glGetUniformLocation( _shader_scene_water.id, "uBoard1" );
   _uniform_scene_water_uShoreColour = glGetUniformLocation( _shader_scene_water.id, "uShoreColour" );
   _uniform_scene_water_uOceanColour = glGetUniformLocation( _shader_scene_water.id, "uOceanColour" );
   _uniform_scene_water_uLightsArray = glGetUniformLocation( _shader_scene_water.id, "uLightsArray" );
   _uniform_scene_water_uLightsIndex = glGetUniformLocation( _shader_scene_water.id, "uLightsIndex" );
   _uniform_scene_water_g_world_depth = glGetUniformLocation( _shader_scene_water.id, "g_world_depth" );
}
#endif /* SHADER_scene_water_H */