chaos pt 1

[carveJwlIkooP6JGAAIwe30JlM.git] / shaders / scene_vertex_blend.h

#ifndef SHADER_scene_vertex_blend_H
#define SHADER_scene_vertex_blend_H
static void shader_scene_vertex_blend_link(void);
static void shader_scene_vertex_blend_register(void);
static struct vg_shader _shader_scene_vertex_blend = {
   .name = "scene_vertex_blend",
   .link = shader_scene_vertex_blend_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"
"\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      6        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"
"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"
""},
   .fs = 
{
.orig_file = "shaders/scene_vertex_blend.fs",
.static_src = 
"uniform sampler2D uTexGarbage;\n"
"uniform sampler2D uTexGradients;\n"
"uniform vec3 uCamera;\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"
"\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_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"
"   vec4 g_board_0;\n"
"   vec4 g_board_1;\n"
"\n"
"   float g_water_fog;\n"
"   float g_time;\n"
"   float g_realtime;\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"
"\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     44        0 \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"
"   float ref_depth = g_water_plane.y*g_water_plane.w;\n"
"   return world_depth_sample( pos ) - ref_depth;\n"
"}\n"
"\n"
"float shadow_sample( vec3 co ){\n"
"   float height_sample = world_depth_sample( co );\n"
"\n"
"   float fdelta = height_sample - co.y;\n"
"   return clamp( fdelta, 0.2, 0.4 )-0.2;\n"
"}\n"
"\n"
"float newlight_compute_sun_shadow( vec3 co, vec3 dir ){\n"
"   if( g_shadow_samples == 0 ){\n"
"      return 1.0;\n"
"   }\n"
"\n"
"   float fspread = g_shadow_spread;\n"
"   float flength = g_shadow_length;\n"
"\n"
"   float famt = 0.0;\n"
"   famt += shadow_sample(co+(dir+vec3(-0.56,0.55, 0.30)*fspread)*flength*0.1);\n"
"   famt += shadow_sample(co+(dir+vec3( 0.80,0.68, 0.34)*fspread)*flength*0.2);\n"
"   famt += shadow_sample(co+(dir+vec3( 0.78,0.07,-0.06)*fspread)*flength*0.3);\n"
"   famt += shadow_sample(co+(dir+vec3(-0.59,0.07,-0.42)*fspread)*flength*0.4);\n"
"\n"
"   //famt+=shadow_sample(co+(dir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
"   //famt+=shadow_sample(co+(dir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
"   //famt+=shadow_sample(co+(dir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
"   //famt+=shadow_sample(co+(dir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
"\n"
"   return 1.0 - famt;\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 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  = 1.0/( 1.0 + 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"
"      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"
"            * step( g_day_phase, light_colour.w );\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"
"      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"
"         l += scene_calculate_light( index_1, halfview, co, normal );\n"
"\n"
"         if( light_count >= 3u ){\n"
"            l += scene_calculate_light( index_2, halfview, co, normal );\n"
"         }\n"
"      }\n"
"   }\n"
"\n"
"   return l;\n"
"}\n"
"\n"
"vec3 world_compute_lighting( vec3 diffuse, vec3 normal, vec3 co,\n"
"                             float light_mask )\n"
"{\n"
"   if( g_light_preview == 1 )\n"
"      diffuse = vec3(0.75);\n"
"\n"
"   // Lighting\n"
"   vec3 halfview = uCamera - co;\n"
"   float fdist = length(halfview);\n"
"   halfview /= fdist;\n"
"\n"
"   float world_shadow = newlight_compute_sun_shadow( \n"
"               co, g_sun_dir.xyz * (1.0/(max(g_sun_dir.y,0.0)+0.2)) );\n"
"\n"
"   vec3 total_light = clearskies_lighting( \n"
"                           normal, min( light_mask, world_shadow ), halfview );\n"
"\n"
"   vec3 cube_coord = (co - 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 coord 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, 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), g_sunset_colour.rgb, g_sunset_phase*0.5 );\n"
"        sun_colour *= sun_shape;\n"
"\n"
"   fog_colour += sun_colour;\n"
"   return scene_apply_fog( diffuse * total_light, fog_colour, fdist );\n"
"}\n"
"\n"
"#line      9        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, g_board_0.xyz,\n"
"                                                      g_board_1.xyz )-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_compute_lighting( vec3 diffuse, vec3 normal, vec3 co )\n"
"{\n"
"   return world_compute_lighting( diffuse, normal, co, compute_board_shadow() );\n"
"}\n"
"\n"
"#line      6        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      7        0 \n"
"\n"
"void main()\n"
"{\n"
"   compute_motion_vectors();\n"
"\n"
"   vec3 vfrag = vec3(0.5,0.5,0.5);\n"
"\n"
"   // ws modulation\n"
"   vec4 wgarbage = vec4(0.5,0.5,0.5,1.0);\n"
"   \n"
"   // Creating normal patches\n"
"   vec3 modnorm = (wgarbage.rgb-0.4) * 1.4;\n"
"   vec3 qnorm = normalize(floor(aNorm.xyz*4.0+modnorm)*0.25);\n"
"   qnorm += vec3(0.001,0.0,0.0);\n"
"\n"
"   vec3 tangent0 = normalize(cross(qnorm,vec3(0.0,1.0,0.0)));\n"
"   vec3 tangent1 = cross(qnorm,tangent0);\n"
"   vec2 uvdiffuse = vec2( dot(tangent0,aCo), dot(tangent1,aCo) ) * 0.160;\n"
"   \n"
"   // Patch local noise\n"
"   vec4 rgarbage = texture( uTexGarbage, uvdiffuse );\n"
"\n"
"   // Colour blending\n"
"   float fblendclip = step(0.380,aNorm.w + (rgarbage.r-0.5)*-1.740)*0.320;\n"
"   vec2 uvgradients = aUv + vec2( fblendclip, 0.0 );\n"
"\n"
"   vfrag = texture( uTexGradients, uvgradients ).rgb;\n"
"   vfrag -= rgarbage.a*0.04;\n"
"\n"
"   if( g_light_preview == 1 )\n"
"   {\n"
"      vfrag = vec3(0.5);\n"
"   }\n"
"\n"
"   vfrag = scene_compute_lighting( vfrag, qnorm, aWorldCo );\n"
"   oColour = vec4(vfrag, 1.0);\n"
"}\n"
""},
};

static GLuint _uniform_scene_vertex_blend_uMdl;
static GLuint _uniform_scene_vertex_blend_uPv;
static GLuint _uniform_scene_vertex_blend_uPvmPrev;
static GLuint _uniform_scene_vertex_blend_uTexGarbage;
static GLuint _uniform_scene_vertex_blend_uTexGradients;
static GLuint _uniform_scene_vertex_blend_uCamera;
static GLuint _uniform_scene_vertex_blend_g_world_depth;
static GLuint _uniform_scene_vertex_blend_uLightsArray;
static GLuint _uniform_scene_vertex_blend_uLightsIndex;
static void shader_scene_vertex_blend_uMdl(m4x3f m){
   glUniformMatrix4x3fv(_uniform_scene_vertex_blend_uMdl,1,GL_FALSE,(float*)m);
}
static void shader_scene_vertex_blend_uPv(m4x4f m){
   glUniformMatrix4fv(_uniform_scene_vertex_blend_uPv,1,GL_FALSE,(float*)m);
}
static void shader_scene_vertex_blend_uPvmPrev(m4x4f m){
   glUniformMatrix4fv(_uniform_scene_vertex_blend_uPvmPrev,1,GL_FALSE,(float*)m);
}
static void shader_scene_vertex_blend_uTexGarbage(int i){
   glUniform1i(_uniform_scene_vertex_blend_uTexGarbage,i);
}
static void shader_scene_vertex_blend_uTexGradients(int i){
   glUniform1i(_uniform_scene_vertex_blend_uTexGradients,i);
}
static void shader_scene_vertex_blend_uCamera(v3f v){
   glUniform3fv(_uniform_scene_vertex_blend_uCamera,1,v);
}
static void shader_scene_vertex_blend_g_world_depth(int i){
   glUniform1i(_uniform_scene_vertex_blend_g_world_depth,i);
}
static void shader_scene_vertex_blend_register(void){
   vg_shader_register( &_shader_scene_vertex_blend );
}
static void shader_scene_vertex_blend_use(void){ glUseProgram(_shader_scene_vertex_blend.id); }
static void shader_scene_vertex_blend_link(void){
   _uniform_scene_vertex_blend_uMdl = glGetUniformLocation( _shader_scene_vertex_blend.id, "uMdl" );
   _uniform_scene_vertex_blend_uPv = glGetUniformLocation( _shader_scene_vertex_blend.id, "uPv" );
   _uniform_scene_vertex_blend_uPvmPrev = glGetUniformLocation( _shader_scene_vertex_blend.id, "uPvmPrev" );
   _uniform_scene_vertex_blend_uTexGarbage = glGetUniformLocation( _shader_scene_vertex_blend.id, "uTexGarbage" );
   _uniform_scene_vertex_blend_uTexGradients = glGetUniformLocation( _shader_scene_vertex_blend.id, "uTexGradients" );
   _uniform_scene_vertex_blend_uCamera = glGetUniformLocation( _shader_scene_vertex_blend.id, "uCamera" );
   _uniform_scene_vertex_blend_g_world_depth = glGetUniformLocation( _shader_scene_vertex_blend.id, "g_world_depth" );
   _uniform_scene_vertex_blend_uLightsArray = glGetUniformLocation( _shader_scene_vertex_blend.id, "uLightsArray" );
   _uniform_scene_vertex_blend_uLightsIndex = glGetUniformLocation( _shader_scene_vertex_blend.id, "uLightsIndex" );
}
#endif /* SHADER_scene_vertex_blend_H */