shaders/model_character_view.h

   1 #ifndef SHADER_model_character_view_H
   2 #define SHADER_model_character_view_H
   3 static void shader_model_character_view_link(void);
   4 static void shader_model_character_view_register(void);
   5 static struct vg_shader _shader_model_character_view = {
   6    .name = "model_character_view",
   7    .link = shader_model_character_view_link,
   8    .vs =
   9 {
  10 .static_src =
  11 "layout (location=0) in vec3 a_co;\n"
  12 "layout (location=1) in vec3 a_norm;\n"
  13 "layout (location=2) in vec2 a_uv;\n"
  14 "layout (location=3) in vec4 a_colour;\n"
  15 "layout (location=4) in vec4 a_weights;\n"
  16 "layout (location=5) in ivec4 a_groups;\n"
  17 "\n"
  18 "#line       1        1 \n"
  19 "const float k_motion_lerp_amount = 0.01;\n"
  20 "\n"
  21 "#line      2        0 \n"
  22 "\n"
  23 "out vec3 aMotionVec0;\n"
  24 "out vec3 aMotionVec1;\n"
  25 "\n"
  26 "void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
  27 "{\n"
  28 "   // This magically solves some artifacting errors!\n"
  29 "   //\n"
  30 "   vproj1 = vproj0*(1.0-k_motion_lerp_amount) + vproj1*k_motion_lerp_amount;\n"
  31 "\n"
  32 "   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
  33 "   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
  34 "}\n"
  35 "\n"
  36 "#line      9        0 \n"
  37 "\n"
  38 "uniform mat4 uPv;\n"
  39 "uniform mat4x3 uTransforms[32];\n"
  40 "\n"
  41 "out vec4 aColour;\n"
  42 "out vec2 aUv;\n"
  43 "out vec3 aNorm;\n"
  44 "out vec3 aCo;\n"
  45 "out vec3 aWorldCo;\n"
  46 "\n"
  47 "void main()\n"
  48 "{\n"
  49 "   vec4 co_local = vec4( a_co, 1.0 );\n"
  50 "   vec3 co0 = uTransforms[ a_groups[0] ] * co_local;\n"
  51 "   vec3 co1 = uTransforms[ a_groups[1] ] * co_local;\n"
  52 "   vec3 co2 = uTransforms[ a_groups[2] ] * co_local;\n"
  53 "   vec3 n0  = mat3(uTransforms[ a_groups[0] ]) * a_norm;\n"
  54 "   vec3 n1  = mat3(uTransforms[ a_groups[1] ]) * a_norm;\n"
  55 "   vec3 n2  = mat3(uTransforms[ a_groups[2] ]) * a_norm;\n"
  56 "\n"
  57 "   vec3 world_pos    = co0*a_weights[0] + co1*a_weights[1] + co2*a_weights[2];\n"
  58 "   vec3 world_normal = n0*a_weights[0]  + n1*a_weights[1]  + n2*a_weights[2];\n"
  59 "   \n"
  60 "   gl_Position = uPv * vec4( world_pos, 1.0 );\n"
  61 "   aColour = a_colour;\n"
  62 "   aUv = a_uv;\n"
  63 "   aNorm = world_normal;\n"
  64 "   aCo = a_co;\n"
  65 "   aWorldCo = world_pos;\n"
  66 "\n"
  67 "   // TODO:\n"
  68 "   aMotionVec0 = vec3(1.0);\n"
  69 "   aMotionVec1 = vec3(1.0);\n"
  70 "}\n"
  71 ""},
  72    .fs =
  73 {
  74 .static_src =
  75 "uniform sampler2D uTexMain;\n"
  76 "uniform vec3 uCamera;\n"
  77 "uniform vec3 uBoard0;\n"
  78 "uniform vec3 uBoard1;\n"
  79 "\n"
  80 "in vec4 aColour;\n"
  81 "in vec2 aUv;\n"
  82 "in vec3 aNorm;\n"
  83 "in vec3 aCo;\n"
  84 "in vec3 aWorldCo;\n"
  85 "\n"
  86 "#line       1        1 \n"
  87 "layout (location = 0) out vec4 oColour;\n"
  88 "\n"
  89 "layout (std140) uniform ub_world_lighting\n"
  90 "{\n"
  91 "   vec4 g_light_colours[3];\n"
  92 "   vec4 g_light_directions[3];\n"
  93 "   vec4 g_ambient_colour;\n"
  94 "\n"
  95 "   vec4 g_water_plane;\n"
  96 "   vec4 g_depth_bounds;\n"
  97 "   float g_water_fog;\n"
  98 "   int g_light_count;\n"
  99 "   int g_light_preview;\n"
 100 "   int g_shadow_samples;\n"
 101 "\n"
 102 "   vec4 g_point_light_positions[32];\n"
 103 "   vec4 g_point_light_colours[32];\n"
 104 "};\n"
 105 "\n"
 106 "uniform sampler2D g_world_depth;\n"
 107 "\n"
 108 "float world_depth_sample( vec3 pos )\n"
 109 "{\n"
 110 "   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
 111 "   return texture( g_world_depth, depth_coord ).r;\n"
 112 "}\n"
 113 "\n"
 114 "float world_water_depth( vec3 pos )\n"
 115 "{\n"
 116 "   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
 117 "   float ref_depth = g_water_plane.y*g_water_plane.w;\n"
 118 "   return texture( g_world_depth, depth_coord ).g - ref_depth;\n"
 119 "}\n"
 120 "\n"
 121 "float shadow_sample( vec3 vdir )\n"
 122 "{\n"
 123 "   vec3 sample_pos = aWorldCo + vdir;\n"
 124 "   float height_sample = world_depth_sample( sample_pos );\n"
 125 "\n"
 126 "   float fdelta = height_sample - sample_pos.y;\n"
 127 "   return clamp( fdelta, 0.1, 0.2 )-0.1;\n"
 128 "}\n"
 129 "\n"
 130 "float sdLine( vec3 p, vec3 a, vec3 b )\n"
 131 "{\n"
 132 "  vec3 pa = p - a;\n"
 133 "  vec3 ba = b - a;\n"
 134 "\n"
 135 "  float h = clamp( dot(pa,ba)/dot(ba,ba), 0.0, 1.0 );\n"
 136 "  return length( pa - ba*h );\n"
 137 "}\n"
 138 "\n"
 139 "vec3 apply_fog( vec3 vfrag, float fdist )\n"
 140 "{\n"
 141 "   float dist = pow(fdist*0.0008,1.2);\n"
 142 "   return mix( vfrag, vec3(0.55,0.76,1.0), min( 1.0, dist ) );\n"
 143 "}\n"
 144 "\n"
 145 "\n"
 146 "// New lighting model\n"
 147 "\n"
 148 "vec3 newlight_compute_ambient()\n"
 149 "{\n"
 150 "   return g_ambient_colour.rgb;\n"
 151 "}\n"
 152 "\n"
 153 "float newlight_compute_sun_shadow()\n"
 154 "{\n"
 155 "   if( g_shadow_samples == 0 )\n"
 156 "   {\n"
 157 "      return 1.0;\n"
 158 "   }\n"
 159 "\n"
 160 "   float fspread = g_light_colours[0].w;\n"
 161 "   vec3  vdir = g_light_directions[0].xyz;\n"
 162 "   float flength = g_light_directions[0].w;\n"
 163 "\n"
 164 "   float famt = 0.0;\n"
 165 "   famt+=shadow_sample((vdir+vec3(-0.563, 0.550, 0.307)*fspread)*flength*0.1);\n"
 166 "   famt+=shadow_sample((vdir+vec3( 0.808, 0.686, 0.346)*fspread)*flength*0.2);\n"
 167 "   famt+=shadow_sample((vdir+vec3( 0.787, 0.074,-0.065)*fspread)*flength*0.3);\n"
 168 "   famt+=shadow_sample((vdir+vec3(-0.593, 0.071,-0.425)*fspread)*flength*0.4);\n"
 169 "   famt+=shadow_sample((vdir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
 170 "   famt+=shadow_sample((vdir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
 171 "   famt+=shadow_sample((vdir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
 172 "   famt+=shadow_sample((vdir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
 173 "\n"
 174 "   // player shadow\n"
 175 "   float dist_to_player = max( 0.0, sdLine( aWorldCo, uBoard0, uBoard1 )-0.1 );\n"
 176 "   float player_shadow = max( 1.0-dist_to_player*2.7, 0.0 );\n"
 177 "   player_shadow *= player_shadow*player_shadow*player_shadow;\n"
 178 "\n"
 179 "   return 1.0 - max( player_shadow*0.8, famt );\n"
 180 "}\n"
 181 "\n"
 182 "vec3 newlight_compute_world_diffuse( vec3 wnormal )\n"
 183 "{\n"
 184 "   vec3 vtotal = g_ambient_colour.rgb;\n"
 185 "\n"
 186 "   for( int i=0; i<g_light_count; i++ )\n"
 187 "   {\n"
 188 "      vec3 vcolour = g_light_colours[i].rgb;\n"
 189 "      vec3 vdir = g_light_directions[i].xyz;\n"
 190 "\n"
 191 "      float flight = max(dot( vdir, wnormal )*0.75+0.25,0.0);\n"
 192 "      vtotal += vcolour*flight;\n"
 193 "   }\n"
 194 "\n"
 195 "   return vtotal;\n"
 196 "}\n"
 197 "\n"
 198 "vec3 newlight_compute_sun_spec( vec3 wnormal, vec3 halfview, float fintensity )\n"
 199 "{\n"
 200 "   vec3 vcolour = g_light_colours[0].rgb;\n"
 201 "   vec3 vdir = g_light_directions[0].xyz;\n"
 202 "\n"
 203 "   vec3 specdir = reflect( -vdir, wnormal );\n"
 204 "   float spec = pow(max(dot( halfview, specdir ), 0.0), 10.0);\n"
 205 "   return vcolour*spec*fintensity;\n"
 206 "}\n"
 207 "\n"
 208 "vec3 newlight_compute_quadratic( vec3 wnormal, vec3 halfview, \n"
 209 "                                 vec3 light_pos, vec3 light_colour )\n"
 210 "{\n"
 211 "   vec3 light_delta = (light_pos-aWorldCo) * 10.0;\n"
 212 "\n"
 213 "   float quadratic = dot(light_delta,light_delta);\n"
 214 "   float attenuation = 1.0f/( 1.0f + quadratic );\n"
 215 "   attenuation *= max( 0.0, dot( normalize(light_delta), wnormal ) );\n"
 216 "\n"
 217 "   return light_colour*attenuation;\n"
 218 "}\n"
 219 "\n"
 220 "#line     13        0 \n"
 221 "#line       1        2 \n"
 222 "const float k_motion_lerp_amount = 0.01;\n"
 223 "\n"
 224 "#line      2        0 \n"
 225 "\n"
 226 "layout (location = 1) out vec2 oMotionVec;\n"
 227 "\n"
 228 "in vec3 aMotionVec0;\n"
 229 "in vec3 aMotionVec1;\n"
 230 "\n"
 231 "void compute_motion_vectors()\n"
 232 "{\n"
 233 "   // Write motion vectors\n"
 234 "   vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
 235 "   vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
 236 "\n"
 237 "   oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
 238 "}\n"
 239 "\n"
 240 "#line     14        0 \n"
 241 "\n"
 242 "void main()\n"
 243 "{\n"
 244 "   compute_motion_vectors();\n"
 245 "\n"
 246 "   vec3 vfrag = texture( uTexMain, aUv ).rgb;\n"
 247 "\n"
 248 "   // Lighting\n"
 249 "   vec3 halfview = uCamera - aWorldCo;\n"
 250 "   float fdist = length( halfview );\n"
 251 "   halfview /= fdist;\n"
 252 "   fdist -= 0.08;\n"
 253 "\n"
 254 "   vec3 qnorm = normalize(floor(aNorm*2.0)*0.5) + vec3(0.001,0.0,0.0);\n"
 255 "\n"
 256 "   vec3 total_light = newlight_compute_ambient();\n"
 257 "   vec3 world_light = newlight_compute_world_diffuse( qnorm );\n"
 258 "\n"
 259 "   float world_shadow = newlight_compute_sun_shadow();\n"
 260 "   total_light += world_light * world_shadow;\n"
 261 "\n"
 262 "   vfrag = apply_fog( vfrag * total_light, fdist );\n"
 263 "\n"
 264 "   float opacity = clamp( fdist*fdist, 0.0, 1.0 );\n"
 265 "   oColour = vec4(vfrag,opacity);\n"
 266 "}\n"
 267 ""},
 268 };
 269
 270 static GLuint _uniform_model_character_view_uPv;
 271 static GLuint _uniform_model_character_view_uTransforms;
 272 static GLuint _uniform_model_character_view_uTexMain;
 273 static GLuint _uniform_model_character_view_uCamera;
 274 static GLuint _uniform_model_character_view_uBoard0;
 275 static GLuint _uniform_model_character_view_uBoard1;
 276 static GLuint _uniform_model_character_view_g_world_depth;
 277 static void shader_model_character_view_uPv(m4x4f m){
 278    glUniformMatrix4fv(_uniform_model_character_view_uPv,1,GL_FALSE,(float*)m);
 279 }
 280 static void shader_model_character_view_uTexMain(int i){
 281    glUniform1i(_uniform_model_character_view_uTexMain,i);
 282 }
 283 static void shader_model_character_view_uCamera(v3f v){
 284    glUniform3fv(_uniform_model_character_view_uCamera,1,v);
 285 }
 286 static void shader_model_character_view_uBoard0(v3f v){
 287    glUniform3fv(_uniform_model_character_view_uBoard0,1,v);
 288 }
 289 static void shader_model_character_view_uBoard1(v3f v){
 290    glUniform3fv(_uniform_model_character_view_uBoard1,1,v);
 291 }
 292 static void shader_model_character_view_g_world_depth(int i){
 293    glUniform1i(_uniform_model_character_view_g_world_depth,i);
 294 }
 295 static void shader_model_character_view_register(void){
 296    vg_shader_register( &_shader_model_character_view );
 297 }
 298 static void shader_model_character_view_use(void){ glUseProgram(_shader_model_character_view.id); }
 299 static void shader_model_character_view_link(void){
 300    _uniform_model_character_view_uPv = glGetUniformLocation( _shader_model_character_view.id, "uPv" );
 301    _uniform_model_character_view_uTransforms = glGetUniformLocation( _shader_model_character_view.id, "uTransforms" );
 302    _uniform_model_character_view_uTexMain = glGetUniformLocation( _shader_model_character_view.id, "uTexMain" );
 303    _uniform_model_character_view_uCamera = glGetUniformLocation( _shader_model_character_view.id, "uCamera" );
 304    _uniform_model_character_view_uBoard0 = glGetUniformLocation( _shader_model_character_view.id, "uBoard0" );
 305    _uniform_model_character_view_uBoard1 = glGetUniformLocation( _shader_model_character_view.id, "uBoard1" );
 306    _uniform_model_character_view_g_world_depth = glGetUniformLocation( _shader_model_character_view.id, "g_world_depth" );
 307 }
 308 #endif /* SHADER_model_character_view_H */