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