src/sky.cpp

   1 #include "sky.h"
   2 #include "IVideoDriver.h"
   3 #include "ISceneManager.h"
   4 #include "ICameraSceneNode.h"
   5 #include "S3DVertex.h"
   6 #include "tile.h" // getTexturePath
   7 #include "noise.h" // easeCurve
   8 #include "main.h" // g_profiler
   9 #include "profiler.h"
  10 #include "util/numeric.h" // MYMIN
  11 #include <cmath>
  12 #include "settings.h"
  13
  14 //! constructor
  15 Sky::Sky(scene::ISceneNode* parent, scene::ISceneManager* mgr, s32 id, LocalPlayer* player):
  16                 scene::ISceneNode(parent, mgr, id),
  17                 m_first_update(true),
  18                 m_brightness(0.5),
  19                 m_cloud_brightness(0.5),
  20                 m_bgcolor_bright_f(1,1,1,1),
  21                 m_skycolor_bright_f(1,1,1,1),
  22                 m_cloudcolor_bright_f(1,1,1,1),
  23                 m_player(player)
  24 {
  25         setAutomaticCulling(scene::EAC_OFF);
  26         Box.MaxEdge.set(0,0,0);
  27         Box.MinEdge.set(0,0,0);
  28
  29         // create material
  30
  31         video::SMaterial mat;
  32         mat.Lighting = false;
  33         mat.ZBuffer = video::ECFN_NEVER;
  34         mat.ZWriteEnable = false;
  35         mat.AntiAliasing=0;
  36         mat.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
  37         mat.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
  38         mat.BackfaceCulling = false;
  39
  40         m_materials[0] = mat;
  41
  42         m_materials[1] = mat;
  43         //m_materials[1].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
  44         m_materials[1].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  45
  46         m_materials[2] = mat;
  47         m_materials[2].setTexture(0, mgr->getVideoDriver()->getTexture(
  48                         getTexturePath("sunrisebg.png").c_str()));
  49         m_materials[2].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  50         //m_materials[2].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
  51
  52         for(u32 i=0; i<SKY_STAR_COUNT; i++){
  53                 m_stars[i] = v3f(
  54                         myrand_range(-10000,10000),
  55                         myrand_range(-10000,10000),
  56                         myrand_range(-10000,10000)
  57                 );
  58                 m_stars[i].normalize();
  59         }
  60
  61         m_directional_colored_fog = g_settings->getBool("directional_colored_fog");
  62 }
  63
  64 void Sky::OnRegisterSceneNode()
  65 {
  66         if (IsVisible)
  67                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
  68
  69         scene::ISceneNode::OnRegisterSceneNode();
  70 }
  71
  72 const core::aabbox3d<f32>& Sky::getBoundingBox() const
  73 {
  74         return Box;
  75 }
  76
  77 //! renders the node.
  78 void Sky::render()
  79 {
  80         video::IVideoDriver* driver = SceneManager->getVideoDriver();
  81         scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
  82
  83         if (!camera || !driver)
  84                 return;
  85
  86         ScopeProfiler sp(g_profiler, "Sky::render()", SPT_AVG);
  87
  88         // draw perspective skybox
  89
  90         core::matrix4 translate(AbsoluteTransformation);
  91         translate.setTranslation(camera->getAbsolutePosition());
  92
  93         // Draw the sky box between the near and far clip plane
  94         const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
  95         core::matrix4 scale;
  96         scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
  97
  98         driver->setTransform(video::ETS_WORLD, translate * scale);
  99
 100         if(m_sunlight_seen)
 101         {
 102                 float sunsize = 0.07;
 103                 video::SColorf suncolor_f(1, 1, 0, 1);
 104                 suncolor_f.r = 1;
 105                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.7+m_time_brightness*(0.5)));
 106                 suncolor_f.b = MYMAX(0.0, m_brightness*0.95);
 107                 video::SColorf suncolor2_f(1, 1, 1, 1);
 108                 suncolor_f.r = 1;
 109                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.85+m_time_brightness*(0.5)));
 110                 suncolor_f.b = MYMAX(0.0, m_brightness);
 111
 112                 float moonsize = 0.04;
 113                 video::SColorf mooncolor_f(0.50, 0.57, 0.65, 1);
 114                 video::SColorf mooncolor2_f(0.85, 0.875, 0.9, 1);
 115
 116                 float nightlength = 0.415;
 117                 float wn = nightlength / 2;
 118                 float wicked_time_of_day = 0;
 119                 if(m_time_of_day > wn && m_time_of_day < 1.0 - wn)
 120                         wicked_time_of_day = (m_time_of_day - wn)/(1.0-wn*2)*0.5 + 0.25;
 121                 else if(m_time_of_day < 0.5)
 122                         wicked_time_of_day = m_time_of_day / wn * 0.25;
 123                 else
 124                         wicked_time_of_day = 1.0 - ((1.0-m_time_of_day) / wn * 0.25);
 125                 /*std::cerr<<"time_of_day="<<m_time_of_day<<" -> "
 126                                 <<"wicked_time_of_day="<<wicked_time_of_day<<std::endl;*/
 127
 128                 video::SColor suncolor = suncolor_f.toSColor();
 129                 video::SColor suncolor2 = suncolor2_f.toSColor();
 130                 video::SColor mooncolor = mooncolor_f.toSColor();
 131                 video::SColor mooncolor2 = mooncolor2_f.toSColor();
 132
 133                 const f32 t = 1.0f;
 134                 const f32 o = 0.0f;
 135                 static const u16 indices[4] = {0,1,2,3};
 136                 video::S3DVertex vertices[4];
 137
 138                 driver->setMaterial(m_materials[1]);
 139
 140                 //video::SColor cloudyfogcolor(255,255,255,255);
 141                 video::SColor cloudyfogcolor = m_bgcolor;
 142                 //video::SColor cloudyfogcolor = m_bgcolor.getInterpolated(m_skycolor, 0.5);
 143
 144                 // Draw far cloudy fog thing
 145                 for(u32 j=0; j<4; j++)
 146                 {
 147                         video::SColor c = cloudyfogcolor.getInterpolated(m_skycolor, 0.45);
 148                         vertices[0] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, t);
 149                         vertices[1] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, t);
 150                         vertices[2] = video::S3DVertex( 1, 0.12,-1, 0,0,1, c, o, o);
 151                         vertices[3] = video::S3DVertex(-1, 0.12,-1, 0,0,1, c, t, o);
 152                         for(u32 i=0; i<4; i++){
 153                                 if(j==0)
 154                                         // Don't switch
 155                                         {}
 156                                 else if(j==1)
 157                                         // Switch from -Z (south) to +X (east)
 158                                         vertices[i].Pos.rotateXZBy(90);
 159                                 else if(j==2)
 160                                         // Switch from -Z (south) to -X (west)
 161                                         vertices[i].Pos.rotateXZBy(-90);
 162                                 else
 163                                         // Switch from -Z (south) to -Z (north)
 164                                         vertices[i].Pos.rotateXZBy(-180);
 165                         }
 166                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 167                 }
 168                 for(u32 j=0; j<4; j++)
 169                 {
 170                         video::SColor c = cloudyfogcolor;
 171                         vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
 172                         vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
 173                         vertices[2] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, o);
 174                         vertices[3] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, o);
 175                         for(u32 i=0; i<4; i++){
 176                                 if(j==0)
 177                                         // Don't switch
 178                                         {}
 179                                 else if(j==1)
 180                                         // Switch from -Z (south) to +X (east)
 181                                         vertices[i].Pos.rotateXZBy(90);
 182                                 else if(j==2)
 183                                         // Switch from -Z (south) to -X (west)
 184                                         vertices[i].Pos.rotateXZBy(-90);
 185                                 else
 186                                         // Switch from -Z (south) to -Z (north)
 187                                         vertices[i].Pos.rotateXZBy(-180);
 188                         }
 189                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 190                 }
 191
 192                 driver->setMaterial(m_materials[2]);
 193
 194                 {
 195                         float mid1 = 0.25;
 196                         float mid = (wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1));
 197                         float a_ = 1.0 - fabs(wicked_time_of_day - mid) * 35.0;
 198                         float a = easeCurve(MYMAX(0, MYMIN(1, a_)));
 199                         //std::cerr<<"a_="<<a_<<" a="<<a<<std::endl;
 200                         video::SColor c(255,255,255,255);
 201                         float y = -(1.0 - a) * 0.2;
 202                         vertices[0] = video::S3DVertex(-1,-0.05+y,-1, 0,0,1, c, t, t);
 203                         vertices[1] = video::S3DVertex( 1,-0.05+y,-1, 0,0,1, c, o, t);
 204                         vertices[2] = video::S3DVertex( 1, 0.2+y,-1, 0,0,1, c, o, o);
 205                         vertices[3] = video::S3DVertex(-1, 0.2+y,-1, 0,0,1, c, t, o);
 206                         for(u32 i=0; i<4; i++){
 207                                 if(wicked_time_of_day < 0.5)
 208                                         // Switch from -Z (south) to +X (east)
 209                                         vertices[i].Pos.rotateXZBy(90);
 210                                 else
 211                                         // Switch from -Z (south) to -X (west)
 212                                         vertices[i].Pos.rotateXZBy(-90);
 213                         }
 214                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 215                 }
 216
 217                 driver->setMaterial(m_materials[1]);
 218
 219                 // Draw sun
 220                 if(wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85)
 221                 {
 222                         float d = sunsize * 1.7;
 223                         video::SColor c = suncolor;
 224                         c.setAlpha(0.05*255);
 225                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 226                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 227                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 228                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 229                         for(u32 i=0; i<4; i++){
 230                                 // Switch from -Z (south) to +X (east)
 231                                 vertices[i].Pos.rotateXZBy(90);
 232                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 233                         }
 234                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 235
 236                         d = sunsize * 1.2;
 237                         c = suncolor;
 238                         c.setAlpha(0.15*255);
 239                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 240                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 241                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 242                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 243                         for(u32 i=0; i<4; i++){
 244                                 // Switch from -Z (south) to +X (east)
 245                                 vertices[i].Pos.rotateXZBy(90);
 246                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 247                         }
 248                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 249
 250                         d = sunsize;
 251                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor, t, t);
 252                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor, o, t);
 253                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor, o, o);
 254                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor, t, o);
 255                         for(u32 i=0; i<4; i++){
 256                                 // Switch from -Z (south) to +X (east)
 257                                 vertices[i].Pos.rotateXZBy(90);
 258                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 259                         }
 260                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 261
 262                         d = sunsize * 0.7;
 263                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor2, t, t);
 264                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor2, o, t);
 265                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor2, o, o);
 266                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor2, t, o);
 267                         for(u32 i=0; i<4; i++){
 268                                 // Switch from -Z (south) to +X (east)
 269                                 vertices[i].Pos.rotateXZBy(90);
 270                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 271                         }
 272                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 273                 }
 274                 // Draw moon
 275                 if(wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7)
 276                 {
 277                         float d = moonsize * 1.9;
 278                         video::SColor c = mooncolor;
 279                         c.setAlpha(0.05*255);
 280                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 281                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 282                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 283                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 284                         for(u32 i=0; i<4; i++){
 285                                 // Switch from -Z (south) to -X (west)
 286                                 vertices[i].Pos.rotateXZBy(-90);
 287                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 288                         }
 289                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 290
 291                         d = moonsize * 1.3;
 292                         c = mooncolor;
 293                         c.setAlpha(0.15*255);
 294                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 295                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 296                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 297                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 298                         for(u32 i=0; i<4; i++){
 299                                 // Switch from -Z (south) to -X (west)
 300                                 vertices[i].Pos.rotateXZBy(-90);
 301                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 302                         }
 303                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 304
 305                         d = moonsize;
 306                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor, t, t);
 307                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, mooncolor, o, t);
 308                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, mooncolor, o, o);
 309                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, mooncolor, t, o);
 310                         for(u32 i=0; i<4; i++){
 311                                 // Switch from -Z (south) to -X (west)
 312                                 vertices[i].Pos.rotateXZBy(-90);
 313                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 314                         }
 315                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 316
 317                         float d2 = moonsize * 0.6;
 318                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor2, t, t);
 319                         vertices[1] = video::S3DVertex( d2,-d,-1, 0,0,1, mooncolor2, o, t);
 320                         vertices[2] = video::S3DVertex( d2, d2,-1, 0,0,1, mooncolor2, o, o);
 321                         vertices[3] = video::S3DVertex(-d, d2,-1, 0,0,1, mooncolor2, t, o);
 322                         for(u32 i=0; i<4; i++){
 323                                 // Switch from -Z (south) to -X (west)
 324                                 vertices[i].Pos.rotateXZBy(-90);
 325                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 326                         }
 327                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 328                 }
 329                 // Stars
 330                 do{
 331                         float starbrightness = MYMAX(0, MYMIN(1,
 332                                         (0.285 - fabs(wicked_time_of_day < 0.5 ?
 333                                         wicked_time_of_day : (1.0 - wicked_time_of_day))) * 10));
 334                         float f = starbrightness;
 335                         float d = 0.007;
 336                         video::SColor starcolor(255, f*90,f*90,f*90);
 337                         if(starcolor.getBlue() < m_skycolor.getBlue())
 338                                 break;
 339                         u16 indices[SKY_STAR_COUNT*4];
 340                         video::S3DVertex vertices[SKY_STAR_COUNT*4];
 341                         for(u32 i=0; i<SKY_STAR_COUNT; i++){
 342                                 indices[i*4+0] = i*4+0;
 343                                 indices[i*4+1] = i*4+1;
 344                                 indices[i*4+2] = i*4+2;
 345                                 indices[i*4+3] = i*4+3;
 346                                 v3f p = m_stars[i];
 347                                 core::CMatrix4<f32> a;
 348                                 a.buildRotateFromTo(v3f(0,1,0), v3f(d,1+d/2,0));
 349                                 v3f p1 = p;
 350                                 a.rotateVect(p1);
 351                                 a.buildRotateFromTo(v3f(0,1,0), v3f(d,1,d));
 352                                 v3f p2 = p;
 353                                 a.rotateVect(p2);
 354                                 a.buildRotateFromTo(v3f(0,1,0), v3f(0,1-d/2,d));
 355                                 v3f p3 = p;
 356                                 a.rotateVect(p3);
 357                                 p.rotateXYBy(wicked_time_of_day * 360 - 90);
 358                                 p1.rotateXYBy(wicked_time_of_day * 360 - 90);
 359                                 p2.rotateXYBy(wicked_time_of_day * 360 - 90);
 360                                 p3.rotateXYBy(wicked_time_of_day * 360 - 90);
 361                                 vertices[i*4+0].Pos = p;
 362                                 vertices[i*4+0].Color = starcolor;
 363                                 vertices[i*4+1].Pos = p1;
 364                                 vertices[i*4+1].Color = starcolor;
 365                                 vertices[i*4+2].Pos = p2;
 366                                 vertices[i*4+2].Color = starcolor;
 367                                 vertices[i*4+3].Pos = p3;
 368                                 vertices[i*4+3].Color = starcolor;
 369                         }
 370                         driver->drawVertexPrimitiveList(vertices, SKY_STAR_COUNT*4,
 371                                         indices, SKY_STAR_COUNT, video::EVT_STANDARD,
 372                                         scene::EPT_QUADS, video::EIT_16BIT);
 373                 }while(0);
 374
 375                 for(u32 j=0; j<2; j++)
 376                 {
 377                         //video::SColor c = m_skycolor;
 378                         video::SColor c = cloudyfogcolor;
 379                         vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
 380                         vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
 381                         vertices[2] = video::S3DVertex( 1,-0.02,-1, 0,0,1, c, o, o);
 382                         vertices[3] = video::S3DVertex(-1,-0.02,-1, 0,0,1, c, t, o);
 383                         for(u32 i=0; i<4; i++){
 384                                 //if(wicked_time_of_day < 0.5)
 385                                 if(j==0)
 386                                         // Switch from -Z (south) to +X (east)
 387                                         vertices[i].Pos.rotateXZBy(90);
 388                                 else
 389                                         // Switch from -Z (south) to -X (west)
 390                                         vertices[i].Pos.rotateXZBy(-90);
 391                         }
 392                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 393                 }
 394         }
 395 }
 396
 397 void Sky::update(float time_of_day, float time_brightness,
 398                 float direct_brightness, bool sunlight_seen)
 399 {
 400         // Stabilize initial brightness and color values by flooding updates
 401         if(m_first_update){
 402                 /*dstream<<"First update with time_of_day="<<time_of_day
 403                                 <<" time_brightness="<<time_brightness
 404                                 <<" direct_brightness="<<direct_brightness
 405                                 <<" sunlight_seen="<<sunlight_seen<<std::endl;*/
 406                 m_first_update = false;
 407                 for(u32 i=0; i<100; i++){
 408                         update(time_of_day, time_brightness, direct_brightness,
 409                                         sunlight_seen);
 410                 }
 411                 return;
 412         }
 413
 414         m_time_of_day = time_of_day;
 415         m_time_brightness = time_brightness;
 416         m_sunlight_seen = sunlight_seen;
 417
 418         bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
 419
 420         //video::SColorf bgcolor_bright_normal_f(170./255,200./255,230./255, 1.0);
 421         video::SColorf bgcolor_bright_normal_f(155./255,193./255,240./255, 1.0);
 422         video::SColorf bgcolor_bright_indoor_f(100./255,100./255,100./255, 1.0);
 423         //video::SColorf bgcolor_bright_dawn_f(0.666,200./255*0.7,230./255*0.5,1.0);
 424         //video::SColorf bgcolor_bright_dawn_f(0.666,0.549,0.220,1.0);
 425         //video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.0, 1.0);
 426         //video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.2,1.0);
 427         video::SColorf bgcolor_bright_dawn_f
 428                         (155./255*1.2,193./255,240./255, 1.0);
 429
 430         video::SColorf skycolor_bright_normal_f =
 431                         video::SColor(255, 140, 186, 250);
 432         video::SColorf skycolor_bright_dawn_f =
 433                         video::SColor(255, 180, 186, 250);
 434
 435         video::SColorf cloudcolor_bright_normal_f =
 436                         video::SColor(255, 240,240,255);
 437         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.591, 0.4);
 438         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
 439         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
 440         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.875, 0.75);
 441
 442         float cloud_color_change_fraction = 0.95;
 443         if(sunlight_seen){
 444                 if(fabs(time_brightness - m_brightness) < 0.2){
 445                         m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
 446                 } else {
 447                         m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
 448                         cloud_color_change_fraction = 0.0;
 449                 }
 450         }
 451         else{
 452                 if(direct_brightness < m_brightness)
 453                         m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
 454                 else
 455                         m_brightness = m_brightness * 0.98 + direct_brightness * 0.02;
 456         }
 457
 458         m_clouds_visible = true;
 459         float color_change_fraction = 0.98;
 460         if(sunlight_seen){
 461                 if(is_dawn){
 462                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 463                                         bgcolor_bright_dawn_f, color_change_fraction);
 464                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 465                                         skycolor_bright_dawn_f, color_change_fraction);
 466                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 467                                         cloudcolor_bright_dawn_f, color_change_fraction);
 468                 } else {
 469                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 470                                         bgcolor_bright_normal_f, color_change_fraction);
 471                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 472                                         skycolor_bright_normal_f, color_change_fraction);
 473                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 474                                         cloudcolor_bright_normal_f, color_change_fraction);
 475                 }
 476         } else {
 477                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 478                                 bgcolor_bright_indoor_f, color_change_fraction);
 479                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 480                                 bgcolor_bright_indoor_f, color_change_fraction);
 481                 m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 482                                 cloudcolor_bright_normal_f, color_change_fraction);
 483                 m_clouds_visible = false;
 484         }
 485
 486         // Horizon coloring based on sun and moon direction during sunset and sunrise
 487         video::SColor pointcolor = video::SColor(255, 255, 255, m_bgcolor.getAlpha());
 488         if (m_directional_colored_fog) {
 489                 if (m_horizon_blend() != 0)
 490                 {
 491                         // calculate hemisphere value from yaw
 492                         f32 pointcolor_blend = wrapDegrees_0_360(m_player->getYaw() + 90);
 493                         if (pointcolor_blend > 180)
 494                                 pointcolor_blend = 360 - pointcolor_blend;
 495                         pointcolor_blend /= 180;
 496                         // bound view angle to determine where transition starts and ends
 497                         pointcolor_blend = rangelim(1 - pointcolor_blend * 1.375, 0, 1 / 1.375) * 1.375;
 498                         // combine the colors when looking up or down, otherwise turning looks weird
 499                         pointcolor_blend += (0.5 - pointcolor_blend) * (1 - MYMIN((90 - std::abs(m_player->getPitch())) / 90 * 1.5, 1));
 500                         // invert direction to match where the sun and moon are rising
 501                         if (m_time_of_day > 0.5)
 502                                 pointcolor_blend = 1 - pointcolor_blend;
 503
 504                         // horizon colors of sun and moon
 505                         f32 pointcolor_light = rangelim(m_time_brightness * 3, 0.2, 1);
 506                         video::SColorf pointcolor_sun_f(1, 1, 1, 1);
 507                         pointcolor_sun_f.r = pointcolor_light * 1;
 508                         pointcolor_sun_f.b = pointcolor_light * (0.25 + (rangelim(m_time_brightness, 0.25, 0.75) - 0.25) * 2 * 0.75);
 509                         pointcolor_sun_f.g = pointcolor_light * (pointcolor_sun_f.b * 0.375 + (rangelim(m_time_brightness, 0.05, 0.15) - 0.05) * 10 * 0.625);
 510                         video::SColorf pointcolor_moon_f(0.5 * pointcolor_light, 0.6 * pointcolor_light, 0.8 * pointcolor_light, 1);
 511                         video::SColor pointcolor_sun = pointcolor_sun_f.toSColor();
 512                         video::SColor pointcolor_moon = pointcolor_moon_f.toSColor();
 513                         // calculate the blend color
 514                         pointcolor = m_mix_scolor(pointcolor_moon, pointcolor_sun, pointcolor_blend);
 515                 }
 516         }
 517
 518         video::SColor bgcolor_bright = m_bgcolor_bright_f.toSColor();
 519         m_bgcolor = video::SColor(
 520                 255,
 521                 bgcolor_bright.getRed() * m_brightness,
 522                 bgcolor_bright.getGreen() * m_brightness,
 523                 bgcolor_bright.getBlue() * m_brightness);
 524         if (m_directional_colored_fog) {
 525                 m_bgcolor = m_mix_scolor(m_bgcolor, pointcolor, m_horizon_blend() * 0.5);
 526         }
 527
 528         video::SColor skycolor_bright = m_skycolor_bright_f.toSColor();
 529         m_skycolor = video::SColor(
 530                 255,
 531                 skycolor_bright.getRed() * m_brightness,
 532                 skycolor_bright.getGreen() * m_brightness,
 533                 skycolor_bright.getBlue() * m_brightness);
 534         if (m_directional_colored_fog) {
 535                 m_skycolor = m_mix_scolor(m_skycolor, pointcolor, m_horizon_blend() * 0.25);
 536         }
 537
 538         float cloud_direct_brightness = 0;
 539         if(sunlight_seen) {
 540                 if (!m_directional_colored_fog) {
 541                         cloud_direct_brightness = time_brightness;
 542                         if(time_brightness >= 0.2 && time_brightness < 0.7)
 543                                 cloud_direct_brightness *= 1.3;
 544                 }
 545                 else {
 546                         cloud_direct_brightness = MYMIN(m_horizon_blend() * 0.15 + m_time_brightness, 1);
 547                 }
 548         } else {
 549                 cloud_direct_brightness = direct_brightness;
 550         }
 551         m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
 552                         cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
 553         m_cloudcolor_f = video::SColorf(
 554                         m_cloudcolor_bright_f.r * m_cloud_brightness,
 555                         m_cloudcolor_bright_f.g * m_cloud_brightness,
 556                         m_cloudcolor_bright_f.b * m_cloud_brightness,
 557                         1.0);
 558         if (m_directional_colored_fog) {
 559                 m_cloudcolor_f = m_mix_scolorf(m_cloudcolor_f, video::SColorf(pointcolor), m_horizon_blend() * 0.25);
 560         }
 561
 562 }
 563
 564