1 #ifndef SHADER_model_sky_H
2 #define SHADER_model_sky_H
3 static void shader_model_sky_link(void);
4 static void shader_model_sky_register(void);
5 static struct vg_shader _shader_model_sky
= {
7 .link
= shader_model_sky_link
,
10 .orig_file
= "shaders/model.vs",
12 "layout (location=0) in vec3 a_co;\n"
13 "layout (location=1) in vec3 a_norm;\n"
14 "layout (location=2) in vec2 a_uv;\n"
15 "layout (location=3) in vec4 a_colour;\n"
16 "layout (location=4) in vec4 a_weights;\n"
17 "layout (location=5) in ivec4 a_groups;\n"
20 "const float k_motion_lerp_amount = 0.01;\n"
24 "out vec3 aMotionVec0;\n"
25 "out vec3 aMotionVec1;\n"
27 "void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
29 " // This magically solves some artifacting errors!\n"
31 " vproj1 = vproj0*(1.0-k_motion_lerp_amount) + vproj1*k_motion_lerp_amount;\n"
33 " aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
34 " aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
39 "uniform mat4x3 uMdl;\n"
41 "uniform mat4 uPvmPrev;\n"
47 "out vec3 aWorldCo;\n"
51 " vec3 world_pos0 = uMdl * vec4( a_co, 1.0 );\n"
52 " vec4 vproj0 = uPv * vec4( world_pos0, 1.0 );\n"
53 " vec4 vproj1 = uPvmPrev * vec4( a_co, 1.0 );\n"
55 " vs_motion_out( vproj0, vproj1 );\n"
57 " gl_Position = vproj0;\n"
58 " aWorldCo = world_pos0;\n"
59 " aColour = a_colour;\n"
61 " aNorm = mat3(uMdl) * a_norm;\n"
67 .orig_file
= "shaders/model_sky.fs",
69 "uniform sampler2D uTexGarbage;\n"
78 "const vec3 uCamera = vec3(0.0);\n"
81 "layout (location = 0) out vec4 oColour;\n"
83 "// OpenGL wiki: Recommends do not use vec3 because of drivers. hence the v4s...\n"
84 "layout (std140) uniform ub_world_lighting\n"
87 " vec4 g_cube_inv_range;\n"
89 " vec4 g_water_plane;\n"
90 " vec4 g_depth_bounds;\n"
92 " vec4 g_daysky_colour;\n"
93 " vec4 g_nightsky_colour;\n"
94 " vec4 g_sunset_colour;\n"
95 " vec4 g_ambient_colour;\n"
96 " vec4 g_sunset_ambient;\n"
97 " vec4 g_sun_colour;\n"
100 " float g_water_fog;\n"
102 " float g_realtime;\n"
103 " float g_shadow_length;\n"
104 " float g_shadow_spread;\n"
106 " float g_time_of_day;\n"
107 " float g_day_phase;\n"
108 " float g_sunset_phase;\n"
110 " int g_light_preview;\n"
111 " int g_shadow_samples;\n"
113 " int g_debug_indices;\n"
114 " int g_debug_complexity;\n"
117 "uniform sampler2D g_world_depth;\n"
118 "uniform samplerBuffer uLightsArray;\n"
119 "uniform usampler3D uLightsIndex;\n"
122 "//const vec3 DAYSKY_COLOUR = vec3( 0.37, 0.54, 0.97 );\n"
123 "//const vec3 NIGHTSKY_COLOUR = vec3( 0.03, 0.05, 0.20 );\n"
124 "//const vec3 SUNSET_COLOUR = vec3( 1.00, 0.32, 0.01 );\n"
125 "//const vec3 AMBIENT_COLOUR = vec3( 0.13, 0.17, 0.35 );\n"
126 "//const vec3 SUNSET_AMBIENT = vec3( 0.25, 0.17, 0.51 );\n"
127 "//const vec3 SUN_COLOUR = vec3( 1.10, 0.89, 0.35 );\n"
129 "const float SUN_ANGLE = 0.0001;\n"
130 "const float PI = 3.14159265;\n"
132 "//struct world_info\n"
142 "float luminance( vec3 v )\n"
144 " return dot( v, vec3(0.2126, 0.7152, 0.0722) );\n"
147 "vec3 clearskies_ambient( vec3 dir )\n"
149 " float sun_azimuth = g_sunset_phase * (dot( dir.xz, g_sun_dir.xz )*0.4+0.6);\n"
150 " float sky_gradient = dir.y;\n"
152 " /* Blend phase colours */\n"
153 " vec3 ambient = g_daysky_colour.rgb * (g_day_phase-g_sunset_phase*0.1);\n"
154 " ambient += g_sunset_colour.rgb * (1.0-dir.y*0.5)*sun_azimuth;\n"
155 " ambient += g_nightsky_colour.rgb * (1.0-g_day_phase);\n"
157 " /* Add gradient */\n"
158 " ambient -= sky_gradient * luminance(ambient);\n"
163 "vec3 clearskies_sky( vec3 ray_dir )\n"
165 " ray_dir.y = abs( ray_dir.y );\n"
166 " vec3 sky_colour = clearskies_ambient( ray_dir );\n"
169 " float sun_theta = dot( ray_dir, g_sun_dir.xyz );\n"
170 " float sun_size = max( 0.0, sun_theta * 0.5 + 0.5 + SUN_ANGLE );\n"
171 " float sun_shape = pow( sun_size, 2000.0 );\n"
172 " sun_shape += sun_size * max(g_sun_dir.y,0.0) * 0.5;\n"
174 " vec3 sun_colour = mix( vec3(1.0), g_sunset_colour.rgb, g_sunset_phase*0.5 );\n"
175 " sun_colour *= sun_shape;\n"
177 " vec3 composite = sky_colour + sun_colour;\n"
178 " return composite;\n"
181 "vec3 clearskies_lighting( vec3 normal, float shadow, vec3 halfview )\n"
183 " float fresnel = 1.0 - abs(dot(normal,halfview));\n"
185 " vec3 reflect_colour = mix( g_daysky_colour.rgb, g_sunset_colour.rgb, \n"
186 " g_sunset_phase );\n"
188 " vec3 sky_reflection = 0.5 * fresnel * reflect_colour;\n"
189 " vec3 light_sun = max(0.0,dot(normal,g_sun_dir.xyz)*0.75+0.25) \n"
190 " * g_sun_colour.rgb * g_day_phase;\n"
192 " float scaled_shadow = max( shadow, 1.0 - max(g_sun_dir.y,0.0) );\n"
193 " vec3 ambient = mix( g_ambient_colour.rgb, g_sunset_ambient.rgb, \n"
194 " g_sunset_phase );\n"
196 " return ambient + (light_sun + sky_reflection) * shadow;\n"
201 "float world_depth_sample( vec3 pos )\n"
203 " vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
204 " return texture( g_world_depth, depth_coord ).r;\n"
207 "float world_water_depth( vec3 pos )\n"
209 " vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
210 " float ref_depth = g_water_plane.y*g_water_plane.w;\n"
211 " return texture( g_world_depth, depth_coord ).g - ref_depth;\n"
214 "float shadow_sample( vec3 vdir )\n"
216 " vec3 sample_pos = aWorldCo + vdir;\n"
217 " float height_sample = world_depth_sample( sample_pos );\n"
219 " float fdelta = height_sample - sample_pos.y;\n"
220 " return clamp( fdelta, 0.2, 0.4 )-0.2;\n"
223 "float newlight_compute_sun_shadow( vec3 dir )\n"
225 " if( g_shadow_samples == 0 )\n"
230 " float fspread = g_shadow_spread;\n"
231 " float flength = g_shadow_length;\n"
233 " float famt = 0.0;\n"
234 " famt += shadow_sample((dir+vec3(-0.56,0.55, 0.30)*fspread)*flength*0.1);\n"
235 " famt += shadow_sample((dir+vec3( 0.80,0.68, 0.34)*fspread)*flength*0.2);\n"
236 " famt += shadow_sample((dir+vec3( 0.78,0.07,-0.06)*fspread)*flength*0.3);\n"
237 " famt += shadow_sample((dir+vec3(-0.59,0.07,-0.42)*fspread)*flength*0.4);\n"
239 " //famt+=shadow_sample((dir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
240 " //famt+=shadow_sample((dir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
241 " //famt+=shadow_sample((dir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
242 " //famt+=shadow_sample((dir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
244 " return 1.0 - famt;\n"
247 "float newlight_specular( vec3 wnormal, vec3 dir, vec3 halfview, float exponent )\n"
249 " vec3 specdir = reflect( -dir, wnormal );\n"
250 " return pow(max(dot( halfview, specdir ), 0.0), exponent);\n"
253 "vec3 scene_apply_fog( vec3 vfrag, vec3 colour, float fdist )\n"
255 " float dist = pow(fdist*0.0010,0.78);\n"
256 " return mix( vfrag, colour, min( 1.0, dist ) );\n"
259 "vec3 rand33(vec3 p3)\n"
261 " p3 = fract(p3 * vec3(.1031, .1030, .0973));\n"
262 " p3 += dot(p3, p3.yxz+33.33);\n"
263 " return fract((p3.xxy + p3.yxx)*p3.zyx);\n"
266 "vec3 scene_calculate_light( int light_index, \n"
267 " vec3 halfview, vec3 co, vec3 normal )\n"
269 " vec4 light_colour = texelFetch( uLightsArray, light_index+0 );\n"
270 " vec4 light_co = texelFetch( uLightsArray, light_index+1 );\n"
271 " vec4 light_dir = texelFetch( uLightsArray, light_index+2 );\n"
273 " vec3 light_delta = light_co.xyz-co;\n"
274 " float dist2 = dot(light_delta,light_delta);\n"
276 " light_delta = normalize( light_delta );\n"
278 " float quadratic = dist2*100.0;\n"
279 " float attenuation = 1.0f/( 1.0f + quadratic );\n"
280 " attenuation *= max( dot( light_delta, normal ), 0.0 );\n"
282 " float falloff = max( 0.0, 1.0-(dist2*light_co.w) );\n"
284 " if( light_dir.w < 0.999999 ){\n"
285 " float spot_theta = max( 0.0, dot( light_delta, -light_dir.xyz ) );\n"
286 " falloff *= max( 0.0, (spot_theta - light_dir.w) / (1.0-light_dir.w) );\n"
289 " return light_colour.rgb * attenuation * falloff \n"
290 " * step( g_day_phase, light_colour.w );\n"
293 "vec3 scene_calculate_packed_light_patch( uint packed_index, \n"
294 " vec3 halfview, vec3 co, vec3 normal )\n"
296 " uint light_count = packed_index & 0x3u;\n"
298 " vec3 l = vec3(0.0);\n"
300 " if( light_count >= 1u ){\n"
301 " int index_0 = int( ((packed_index >> 2u) & 0x3ffu) * 3u );\n"
302 " int index_1 = int( ((packed_index >> 12u) & 0x3ffu) * 3u );\n"
303 " int index_2 = int( ((packed_index >> 22u) & 0x3ffu) * 3u );\n"
305 " l += scene_calculate_light( index_0, halfview, co, normal );\n"
307 " if( light_count >= 2u ){\n"
308 " l += scene_calculate_light( index_1, halfview, co, normal );\n"
310 " if( light_count >= 3u ){\n"
311 " l += scene_calculate_light( index_2, halfview, co, normal );\n"
319 "vec3 world_compute_lighting( vec3 diffuse, vec3 normal, vec3 co,\n"
320 " float light_mask )\n"
322 " if( g_light_preview == 1 )\n"
323 " diffuse = vec3(0.75);\n"
326 " vec3 halfview = uCamera - co;\n"
327 " float fdist = length(halfview);\n"
328 " halfview /= fdist;\n"
330 " float world_shadow = newlight_compute_sun_shadow( g_sun_dir.xyz \n"
331 " * (1.0/(max(g_sun_dir.y,0.0)+0.2)) );\n"
333 " vec3 total_light = clearskies_lighting( \n"
334 " normal, min( light_mask, world_shadow ), halfview );\n"
336 " vec3 cube_coord = (co - g_cube_min.xyz) * g_cube_inv_range.xyz;\n"
337 " cube_coord = floor( cube_coord );\n"
339 " if( g_debug_indices == 1 )\n"
341 " return rand33(cube_coord);\n"
344 " if( g_debug_complexity == 1 )\n"
346 " ivec3 coord = ivec3( cube_coord );\n"
347 " uvec4 index_sample = texelFetch( uLightsIndex, coord, 0 );\n"
349 " uint light_count = (index_sample.x & 0x3u) + (index_sample.y & 0x3u);\n"
350 " return vec3( float(light_count)*(1.0/6.0), 0.0, 0.5 );\n"
353 " // FIXME: this coord should absolutely must be clamped!\n"
355 " ivec3 coord = ivec3( cube_coord );\n"
356 " uvec4 index_sample = texelFetch( uLightsIndex, coord, 0 );\n"
359 " scene_calculate_packed_light_patch( index_sample.x,\n"
360 " halfview, co, normal ) \n"
363 " scene_calculate_packed_light_patch( index_sample.y,\n"
364 " halfview, co, normal )\n"
367 " // Take a section of the sky function to give us a matching fog colour\n"
369 " vec3 fog_colour = clearskies_ambient( -halfview );\n"
370 " float sun_theta = dot( -halfview, g_sun_dir.xyz );\n"
371 " float sun_size = max( 0.0, sun_theta * 0.5 + 0.5 );\n"
372 " float sun_shape = sun_size * max(g_sun_dir.y,0.0) * 0.5;\n"
374 " vec3 sun_colour = mix( vec3(1.0), g_sunset_colour.rgb, g_sunset_phase*0.5 );\n"
375 " sun_colour *= sun_shape;\n"
377 " fog_colour += sun_colour;\n"
378 " return scene_apply_fog( diffuse * total_light, fog_colour, fdist );\n"
383 "const float k_motion_lerp_amount = 0.01;\n"
387 "layout (location = 1) out vec2 oMotionVec;\n"
389 "in vec3 aMotionVec0;\n"
390 "in vec3 aMotionVec1;\n"
392 "void compute_motion_vectors()\n"
394 " // Write motion vectors\n"
395 " vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
396 " vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
398 " oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
405 " compute_motion_vectors();\n"
407 " vec3 rd = normalize(aNorm);\n"
409 " float fmove = g_time * 5.0;\n"
410 " vec2 cloudplane = (rd.xz / (rd.y*sign(rd.y))) * 0.025;\n"
411 " vec4 clouds1 = texture( uTexGarbage, cloudplane + vec2(0.1,0.4)*fmove*2.0 );\n"
412 " vec4 clouds2 = texture( uTexGarbage, cloudplane*2.0 + vec2(0.3,0.1)*fmove );\n"
414 " float cloud_d = max(clouds1.b*clouds2.r -0.2 - clouds2.g*0.4,0.0);\n"
415 " float cloud_e = pow(cloud_d,1.5)*pow(abs(rd.y),0.3)*2.0;\n"
417 " oColour = vec4( clearskies_sky( -rd ) ,1.0);\n"
419 " vec3 cloud_colour = mix( mix(g_nightsky_colour.rgb,vec3(1.0),g_day_phase), \n"
420 " g_sunset_colour.rgb, g_sunset_phase );\n"
422 " oColour.rgb = mix( oColour.rgb, cloud_colour, cloud_e );\n"
427 static GLuint _uniform_model_sky_uMdl
;
428 static GLuint _uniform_model_sky_uPv
;
429 static GLuint _uniform_model_sky_uPvmPrev
;
430 static GLuint _uniform_model_sky_uTexGarbage
;
431 static GLuint _uniform_model_sky_g_world_depth
;
432 static GLuint _uniform_model_sky_uLightsArray
;
433 static GLuint _uniform_model_sky_uLightsIndex
;
434 static void shader_model_sky_uMdl(m4x3f m
){
435 glUniformMatrix4x3fv(_uniform_model_sky_uMdl
,1,GL_FALSE
,(float*)m
);
437 static void shader_model_sky_uPv(m4x4f m
){
438 glUniformMatrix4fv(_uniform_model_sky_uPv
,1,GL_FALSE
,(float*)m
);
440 static void shader_model_sky_uPvmPrev(m4x4f m
){
441 glUniformMatrix4fv(_uniform_model_sky_uPvmPrev
,1,GL_FALSE
,(float*)m
);
443 static void shader_model_sky_uTexGarbage(int i
){
444 glUniform1i(_uniform_model_sky_uTexGarbage
,i
);
446 static void shader_model_sky_g_world_depth(int i
){
447 glUniform1i(_uniform_model_sky_g_world_depth
,i
);
449 static void shader_model_sky_register(void){
450 vg_shader_register( &_shader_model_sky
);
452 static void shader_model_sky_use(void){ glUseProgram(_shader_model_sky
.id
); }
453 static void shader_model_sky_link(void){
454 _uniform_model_sky_uMdl
= glGetUniformLocation( _shader_model_sky
.id
, "uMdl" );
455 _uniform_model_sky_uPv
= glGetUniformLocation( _shader_model_sky
.id
, "uPv" );
456 _uniform_model_sky_uPvmPrev
= glGetUniformLocation( _shader_model_sky
.id
, "uPvmPrev" );
457 _uniform_model_sky_uTexGarbage
= glGetUniformLocation( _shader_model_sky
.id
, "uTexGarbage" );
458 _uniform_model_sky_g_world_depth
= glGetUniformLocation( _shader_model_sky
.id
, "g_world_depth" );
459 _uniform_model_sky_uLightsArray
= glGetUniformLocation( _shader_model_sky
.id
, "uLightsArray" );
460 _uniform_model_sky_uLightsIndex
= glGetUniformLocation( _shader_model_sky
.id
, "uLightsIndex" );
462 #endif /* SHADER_model_sky_H */