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_visible(true),
  18                 m_fallback_bg_color(255,255,255,255),
  19                 m_first_update(true),
  20                 m_brightness(0.5),
  21                 m_cloud_brightness(0.5),
  22                 m_bgcolor_bright_f(1,1,1,1),
  23                 m_skycolor_bright_f(1,1,1,1),
  24                 m_cloudcolor_bright_f(1,1,1,1),
  25                 m_player(player)
  26 {
  27         setAutomaticCulling(scene::EAC_OFF);
  28         Box.MaxEdge.set(0,0,0);
  29         Box.MinEdge.set(0,0,0);
  30
  31         // create material
  32
  33         video::SMaterial mat;
  34         mat.Lighting = false;
  35         mat.ZBuffer = video::ECFN_NEVER;
  36         mat.ZWriteEnable = false;
  37         mat.AntiAliasing=0;
  38         mat.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
  39         mat.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
  40         mat.BackfaceCulling = false;
  41
  42         m_materials[0] = mat;
  43
  44         m_materials[1] = mat;
  45         //m_materials[1].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
  46         m_materials[1].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  47
  48         m_materials[2] = mat;
  49         m_materials[2].setTexture(0, mgr->getVideoDriver()->getTexture(
  50                         getTexturePath("sunrisebg.png").c_str()));
  51         m_materials[2].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  52         //m_materials[2].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
  53
  54         for(u32 i=0; i<SKY_STAR_COUNT; i++){
  55                 m_stars[i] = v3f(
  56                         myrand_range(-10000,10000),
  57                         myrand_range(-10000,10000),
  58                         myrand_range(-10000,10000)
  59                 );
  60                 m_stars[i].normalize();
  61         }
  62
  63         m_directional_colored_fog = g_settings->getBool("directional_colored_fog");
  64 }
  65
  66 void Sky::OnRegisterSceneNode()
  67 {
  68         if (IsVisible)
  69                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
  70
  71         scene::ISceneNode::OnRegisterSceneNode();
  72 }
  73
  74 const core::aabbox3d<f32>& Sky::getBoundingBox() const
  75 {
  76         return Box;
  77 }
  78
  79 //! renders the node.
  80 void Sky::render()
  81 {
  82         if(!m_visible)
  83                 return;
  84
  85         video::IVideoDriver* driver = SceneManager->getVideoDriver();
  86         scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
  87
  88         if (!camera || !driver)
  89                 return;
  90
  91         ScopeProfiler sp(g_profiler, "Sky::render()", SPT_AVG);
  92
  93         // draw perspective skybox
  94
  95         core::matrix4 translate(AbsoluteTransformation);
  96         translate.setTranslation(camera->getAbsolutePosition());
  97
  98         // Draw the sky box between the near and far clip plane
  99         const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
 100         core::matrix4 scale;
 101         scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
 102
 103         driver->setTransform(video::ETS_WORLD, translate * scale);
 104
 105         if(m_sunlight_seen)
 106         {
 107                 float sunsize = 0.07;
 108                 video::SColorf suncolor_f(1, 1, 0, 1);
 109                 suncolor_f.r = 1;
 110                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.7+m_time_brightness*(0.5)));
 111                 suncolor_f.b = MYMAX(0.0, m_brightness*0.95);
 112                 video::SColorf suncolor2_f(1, 1, 1, 1);
 113                 suncolor_f.r = 1;
 114                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.85+m_time_brightness*(0.5)));
 115                 suncolor_f.b = MYMAX(0.0, m_brightness);
 116
 117                 float moonsize = 0.04;
 118                 video::SColorf mooncolor_f(0.50, 0.57, 0.65, 1);
 119                 video::SColorf mooncolor2_f(0.85, 0.875, 0.9, 1);
 120
 121                 float nightlength = 0.415;
 122                 float wn = nightlength / 2;
 123                 float wicked_time_of_day = 0;
 124                 if(m_time_of_day > wn && m_time_of_day < 1.0 - wn)
 125                         wicked_time_of_day = (m_time_of_day - wn)/(1.0-wn*2)*0.5 + 0.25;
 126                 else if(m_time_of_day < 0.5)
 127                         wicked_time_of_day = m_time_of_day / wn * 0.25;
 128                 else
 129                         wicked_time_of_day = 1.0 - ((1.0-m_time_of_day) / wn * 0.25);
 130                 /*std::cerr<<"time_of_day="<<m_time_of_day<<" -> "
 131                                 <<"wicked_time_of_day="<<wicked_time_of_day<<std::endl;*/
 132
 133                 video::SColor suncolor = suncolor_f.toSColor();
 134                 video::SColor suncolor2 = suncolor2_f.toSColor();
 135                 video::SColor mooncolor = mooncolor_f.toSColor();
 136                 video::SColor mooncolor2 = mooncolor2_f.toSColor();
 137
 138                 const f32 t = 1.0f;
 139                 const f32 o = 0.0f;
 140                 static const u16 indices[4] = {0,1,2,3};
 141                 video::S3DVertex vertices[4];
 142
 143                 driver->setMaterial(m_materials[1]);
 144
 145                 //video::SColor cloudyfogcolor(255,255,255,255);
 146                 video::SColor cloudyfogcolor = m_bgcolor;
 147                 //video::SColor cloudyfogcolor = m_bgcolor.getInterpolated(m_skycolor, 0.5);
 148
 149                 // Draw far cloudy fog thing
 150                 for(u32 j=0; j<4; j++)
 151                 {
 152                         video::SColor c = cloudyfogcolor.getInterpolated(m_skycolor, 0.45);
 153                         vertices[0] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, t);
 154                         vertices[1] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, t);
 155                         vertices[2] = video::S3DVertex( 1, 0.12,-1, 0,0,1, c, o, o);
 156                         vertices[3] = video::S3DVertex(-1, 0.12,-1, 0,0,1, c, t, o);
 157                         for(u32 i=0; i<4; i++){
 158                                 if(j==0)
 159                                         // Don't switch
 160                                         {}
 161                                 else if(j==1)
 162                                         // Switch from -Z (south) to +X (east)
 163                                         vertices[i].Pos.rotateXZBy(90);
 164                                 else if(j==2)
 165                                         // Switch from -Z (south) to -X (west)
 166                                         vertices[i].Pos.rotateXZBy(-90);
 167                                 else
 168                                         // Switch from -Z (south) to -Z (north)
 169                                         vertices[i].Pos.rotateXZBy(-180);
 170                         }
 171                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 172                 }
 173                 for(u32 j=0; j<4; j++)
 174                 {
 175                         video::SColor c = cloudyfogcolor;
 176                         vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
 177                         vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
 178                         vertices[2] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, o);
 179                         vertices[3] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, o);
 180                         for(u32 i=0; i<4; i++){
 181                                 if(j==0)
 182                                         // Don't switch
 183                                         {}
 184                                 else if(j==1)
 185                                         // Switch from -Z (south) to +X (east)
 186                                         vertices[i].Pos.rotateXZBy(90);
 187                                 else if(j==2)
 188                                         // Switch from -Z (south) to -X (west)
 189                                         vertices[i].Pos.rotateXZBy(-90);
 190                                 else
 191                                         // Switch from -Z (south) to -Z (north)
 192                                         vertices[i].Pos.rotateXZBy(-180);
 193                         }
 194                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 195                 }
 196
 197                 driver->setMaterial(m_materials[2]);
 198
 199                 {
 200                         float mid1 = 0.25;
 201                         float mid = (wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1));
 202                         float a_ = 1.0 - fabs(wicked_time_of_day - mid) * 35.0;
 203                         float a = easeCurve(MYMAX(0, MYMIN(1, a_)));
 204                         //std::cerr<<"a_="<<a_<<" a="<<a<<std::endl;
 205                         video::SColor c(255,255,255,255);
 206                         float y = -(1.0 - a) * 0.2;
 207                         vertices[0] = video::S3DVertex(-1,-0.05+y,-1, 0,0,1, c, t, t);
 208                         vertices[1] = video::S3DVertex( 1,-0.05+y,-1, 0,0,1, c, o, t);
 209                         vertices[2] = video::S3DVertex( 1, 0.2+y,-1, 0,0,1, c, o, o);
 210                         vertices[3] = video::S3DVertex(-1, 0.2+y,-1, 0,0,1, c, t, o);
 211                         for(u32 i=0; i<4; i++){
 212                                 if(wicked_time_of_day < 0.5)
 213                                         // Switch from -Z (south) to +X (east)
 214                                         vertices[i].Pos.rotateXZBy(90);
 215                                 else
 216                                         // Switch from -Z (south) to -X (west)
 217                                         vertices[i].Pos.rotateXZBy(-90);
 218                         }
 219                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 220                 }
 221
 222                 driver->setMaterial(m_materials[1]);
 223
 224                 // Draw sun
 225                 if(wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85)
 226                 {
 227                         float d = sunsize * 1.7;
 228                         video::SColor c = suncolor;
 229                         c.setAlpha(0.05*255);
 230                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 231                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 232                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 233                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 234                         for(u32 i=0; i<4; i++){
 235                                 // Switch from -Z (south) to +X (east)
 236                                 vertices[i].Pos.rotateXZBy(90);
 237                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 238                         }
 239                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 240
 241                         d = sunsize * 1.2;
 242                         c = suncolor;
 243                         c.setAlpha(0.15*255);
 244                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 245                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 246                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 247                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 248                         for(u32 i=0; i<4; i++){
 249                                 // Switch from -Z (south) to +X (east)
 250                                 vertices[i].Pos.rotateXZBy(90);
 251                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 252                         }
 253                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 254
 255                         d = sunsize;
 256                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor, t, t);
 257                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor, o, t);
 258                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor, o, o);
 259                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor, t, o);
 260                         for(u32 i=0; i<4; i++){
 261                                 // Switch from -Z (south) to +X (east)
 262                                 vertices[i].Pos.rotateXZBy(90);
 263                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 264                         }
 265                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 266
 267                         d = sunsize * 0.7;
 268                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor2, t, t);
 269                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor2, o, t);
 270                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor2, o, o);
 271                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor2, t, o);
 272                         for(u32 i=0; i<4; i++){
 273                                 // Switch from -Z (south) to +X (east)
 274                                 vertices[i].Pos.rotateXZBy(90);
 275                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 276                         }
 277                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 278                 }
 279                 // Draw moon
 280                 if(wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7)
 281                 {
 282                         float d = moonsize * 1.9;
 283                         video::SColor c = mooncolor;
 284                         c.setAlpha(0.05*255);
 285                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 286                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 287                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 288                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 289                         for(u32 i=0; i<4; i++){
 290                                 // Switch from -Z (south) to -X (west)
 291                                 vertices[i].Pos.rotateXZBy(-90);
 292                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 293                         }
 294                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 295
 296                         d = moonsize * 1.3;
 297                         c = mooncolor;
 298                         c.setAlpha(0.15*255);
 299                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 300                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 301                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 302                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 303                         for(u32 i=0; i<4; i++){
 304                                 // Switch from -Z (south) to -X (west)
 305                                 vertices[i].Pos.rotateXZBy(-90);
 306                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 307                         }
 308                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 309
 310                         d = moonsize;
 311                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor, t, t);
 312                         vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, mooncolor, o, t);
 313                         vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, mooncolor, o, o);
 314                         vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, mooncolor, t, o);
 315                         for(u32 i=0; i<4; i++){
 316                                 // Switch from -Z (south) to -X (west)
 317                                 vertices[i].Pos.rotateXZBy(-90);
 318                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 319                         }
 320                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 321
 322                         float d2 = moonsize * 0.6;
 323                         vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor2, t, t);
 324                         vertices[1] = video::S3DVertex( d2,-d,-1, 0,0,1, mooncolor2, o, t);
 325                         vertices[2] = video::S3DVertex( d2, d2,-1, 0,0,1, mooncolor2, o, o);
 326                         vertices[3] = video::S3DVertex(-d, d2,-1, 0,0,1, mooncolor2, t, o);
 327                         for(u32 i=0; i<4; i++){
 328                                 // Switch from -Z (south) to -X (west)
 329                                 vertices[i].Pos.rotateXZBy(-90);
 330                                 vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 331                         }
 332                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 333                 }
 334                 // Stars
 335                 do{
 336                         float starbrightness = MYMAX(0, MYMIN(1,
 337                                         (0.285 - fabs(wicked_time_of_day < 0.5 ?
 338                                         wicked_time_of_day : (1.0 - wicked_time_of_day))) * 10));
 339                         float f = starbrightness;
 340                         float d = 0.007;
 341                         video::SColor starcolor(255, f*90,f*90,f*90);
 342                         if(starcolor.getBlue() < m_skycolor.getBlue())
 343                                 break;
 344                         u16 indices[SKY_STAR_COUNT*4];
 345                         video::S3DVertex vertices[SKY_STAR_COUNT*4];
 346                         for(u32 i=0; i<SKY_STAR_COUNT; i++){
 347                                 indices[i*4+0] = i*4+0;
 348                                 indices[i*4+1] = i*4+1;
 349                                 indices[i*4+2] = i*4+2;
 350                                 indices[i*4+3] = i*4+3;
 351                                 v3f p = m_stars[i];
 352                                 core::CMatrix4<f32> a;
 353                                 a.buildRotateFromTo(v3f(0,1,0), v3f(d,1+d/2,0));
 354                                 v3f p1 = p;
 355                                 a.rotateVect(p1);
 356                                 a.buildRotateFromTo(v3f(0,1,0), v3f(d,1,d));
 357                                 v3f p2 = p;
 358                                 a.rotateVect(p2);
 359                                 a.buildRotateFromTo(v3f(0,1,0), v3f(0,1-d/2,d));
 360                                 v3f p3 = p;
 361                                 a.rotateVect(p3);
 362                                 p.rotateXYBy(wicked_time_of_day * 360 - 90);
 363                                 p1.rotateXYBy(wicked_time_of_day * 360 - 90);
 364                                 p2.rotateXYBy(wicked_time_of_day * 360 - 90);
 365                                 p3.rotateXYBy(wicked_time_of_day * 360 - 90);
 366                                 vertices[i*4+0].Pos = p;
 367                                 vertices[i*4+0].Color = starcolor;
 368                                 vertices[i*4+1].Pos = p1;
 369                                 vertices[i*4+1].Color = starcolor;
 370                                 vertices[i*4+2].Pos = p2;
 371                                 vertices[i*4+2].Color = starcolor;
 372                                 vertices[i*4+3].Pos = p3;
 373                                 vertices[i*4+3].Color = starcolor;
 374                         }
 375                         driver->drawVertexPrimitiveList(vertices, SKY_STAR_COUNT*4,
 376                                         indices, SKY_STAR_COUNT, video::EVT_STANDARD,
 377                                         scene::EPT_QUADS, video::EIT_16BIT);
 378                 }while(0);
 379
 380                 for(u32 j=0; j<2; j++)
 381                 {
 382                         //video::SColor c = m_skycolor;
 383                         video::SColor c = cloudyfogcolor;
 384                         vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
 385                         vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
 386                         vertices[2] = video::S3DVertex( 1,-0.02,-1, 0,0,1, c, o, o);
 387                         vertices[3] = video::S3DVertex(-1,-0.02,-1, 0,0,1, c, t, o);
 388                         for(u32 i=0; i<4; i++){
 389                                 //if(wicked_time_of_day < 0.5)
 390                                 if(j==0)
 391                                         // Switch from -Z (south) to +X (east)
 392                                         vertices[i].Pos.rotateXZBy(90);
 393                                 else
 394                                         // Switch from -Z (south) to -X (west)
 395                                         vertices[i].Pos.rotateXZBy(-90);
 396                         }
 397                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 398                 }
 399         }
 400 }
 401
 402 void Sky::update(float time_of_day, float time_brightness,
 403                 float direct_brightness, bool sunlight_seen)
 404 {
 405         // Stabilize initial brightness and color values by flooding updates
 406         if(m_first_update){
 407                 /*dstream<<"First update with time_of_day="<<time_of_day
 408                                 <<" time_brightness="<<time_brightness
 409                                 <<" direct_brightness="<<direct_brightness
 410                                 <<" sunlight_seen="<<sunlight_seen<<std::endl;*/
 411                 m_first_update = false;
 412                 for(u32 i=0; i<100; i++){
 413                         update(time_of_day, time_brightness, direct_brightness,
 414                                         sunlight_seen);
 415                 }
 416                 return;
 417         }
 418
 419         m_time_of_day = time_of_day;
 420         m_time_brightness = time_brightness;
 421         m_sunlight_seen = sunlight_seen;
 422
 423         bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
 424
 425         //video::SColorf bgcolor_bright_normal_f(170./255,200./255,230./255, 1.0);
 426         video::SColorf bgcolor_bright_normal_f(155./255,193./255,240./255, 1.0);
 427         video::SColorf bgcolor_bright_indoor_f(100./255,100./255,100./255, 1.0);
 428         //video::SColorf bgcolor_bright_dawn_f(0.666,200./255*0.7,230./255*0.5,1.0);
 429         //video::SColorf bgcolor_bright_dawn_f(0.666,0.549,0.220,1.0);
 430         //video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.0, 1.0);
 431         //video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.2,1.0);
 432         video::SColorf bgcolor_bright_dawn_f
 433                         (155./255*1.2,193./255,240./255, 1.0);
 434
 435         video::SColorf skycolor_bright_normal_f =
 436                         video::SColor(255, 140, 186, 250);
 437         video::SColorf skycolor_bright_dawn_f =
 438                         video::SColor(255, 180, 186, 250);
 439
 440         video::SColorf cloudcolor_bright_normal_f =
 441                         video::SColor(255, 240,240,255);
 442         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.591, 0.4);
 443         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
 444         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
 445         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.875, 0.75);
 446
 447         float cloud_color_change_fraction = 0.95;
 448         if(sunlight_seen){
 449                 if(fabs(time_brightness - m_brightness) < 0.2){
 450                         m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
 451                 } else {
 452                         m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
 453                         cloud_color_change_fraction = 0.0;
 454                 }
 455         }
 456         else{
 457                 if(direct_brightness < m_brightness)
 458                         m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
 459                 else
 460                         m_brightness = m_brightness * 0.98 + direct_brightness * 0.02;
 461         }
 462
 463         m_clouds_visible = true;
 464         float color_change_fraction = 0.98;
 465         if(sunlight_seen){
 466                 if(is_dawn){
 467                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 468                                         bgcolor_bright_dawn_f, color_change_fraction);
 469                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 470                                         skycolor_bright_dawn_f, color_change_fraction);
 471                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 472                                         cloudcolor_bright_dawn_f, color_change_fraction);
 473                 } else {
 474                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 475                                         bgcolor_bright_normal_f, color_change_fraction);
 476                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 477                                         skycolor_bright_normal_f, color_change_fraction);
 478                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 479                                         cloudcolor_bright_normal_f, color_change_fraction);
 480                 }
 481         } else {
 482                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 483                                 bgcolor_bright_indoor_f, color_change_fraction);
 484                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 485                                 bgcolor_bright_indoor_f, color_change_fraction);
 486                 m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 487                                 cloudcolor_bright_normal_f, color_change_fraction);
 488                 m_clouds_visible = false;
 489         }
 490
 491         // Horizon coloring based on sun and moon direction during sunset and sunrise
 492         video::SColor pointcolor = video::SColor(255, 255, 255, m_bgcolor.getAlpha());
 493         if (m_directional_colored_fog) {
 494                 if (m_horizon_blend() != 0)
 495                 {
 496                         // calculate hemisphere value from yaw
 497                         f32 pointcolor_blend = wrapDegrees_0_360(m_player->getYaw() + 90);
 498                         if (pointcolor_blend > 180)
 499                                 pointcolor_blend = 360 - pointcolor_blend;
 500                         pointcolor_blend /= 180;
 501                         // bound view angle to determine where transition starts and ends
 502                         pointcolor_blend = rangelim(1 - pointcolor_blend * 1.375, 0, 1 / 1.375) * 1.375;
 503                         // combine the colors when looking up or down, otherwise turning looks weird
 504                         pointcolor_blend += (0.5 - pointcolor_blend) * (1 - MYMIN((90 - std::abs(m_player->getPitch())) / 90 * 1.5, 1));
 505                         // invert direction to match where the sun and moon are rising
 506                         if (m_time_of_day > 0.5)
 507                                 pointcolor_blend = 1 - pointcolor_blend;
 508
 509                         // horizon colors of sun and moon
 510                         f32 pointcolor_light = rangelim(m_time_brightness * 3, 0.2, 1);
 511                         video::SColorf pointcolor_sun_f(1, 1, 1, 1);
 512                         pointcolor_sun_f.r = pointcolor_light * 1;
 513                         pointcolor_sun_f.b = pointcolor_light * (0.25 + (rangelim(m_time_brightness, 0.25, 0.75) - 0.25) * 2 * 0.75);
 514                         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);
 515                         video::SColorf pointcolor_moon_f(0.5 * pointcolor_light, 0.6 * pointcolor_light, 0.8 * pointcolor_light, 1);
 516                         video::SColor pointcolor_sun = pointcolor_sun_f.toSColor();
 517                         video::SColor pointcolor_moon = pointcolor_moon_f.toSColor();
 518                         // calculate the blend color
 519                         pointcolor = m_mix_scolor(pointcolor_moon, pointcolor_sun, pointcolor_blend);
 520                 }
 521         }
 522
 523         video::SColor bgcolor_bright = m_bgcolor_bright_f.toSColor();
 524         m_bgcolor = video::SColor(
 525                 255,
 526                 bgcolor_bright.getRed() * m_brightness,
 527                 bgcolor_bright.getGreen() * m_brightness,
 528                 bgcolor_bright.getBlue() * m_brightness);
 529         if (m_directional_colored_fog) {
 530                 m_bgcolor = m_mix_scolor(m_bgcolor, pointcolor, m_horizon_blend() * 0.5);
 531         }
 532
 533         video::SColor skycolor_bright = m_skycolor_bright_f.toSColor();
 534         m_skycolor = video::SColor(
 535                 255,
 536                 skycolor_bright.getRed() * m_brightness,
 537                 skycolor_bright.getGreen() * m_brightness,
 538                 skycolor_bright.getBlue() * m_brightness);
 539         if (m_directional_colored_fog) {
 540                 m_skycolor = m_mix_scolor(m_skycolor, pointcolor, m_horizon_blend() * 0.25);
 541         }
 542
 543         float cloud_direct_brightness = 0;
 544         if(sunlight_seen) {
 545                 if (!m_directional_colored_fog) {
 546                         cloud_direct_brightness = time_brightness;
 547                         if(time_brightness >= 0.2 && time_brightness < 0.7)
 548                                 cloud_direct_brightness *= 1.3;
 549                 }
 550                 else {
 551                         cloud_direct_brightness = MYMIN(m_horizon_blend() * 0.15 + m_time_brightness, 1);
 552                 }
 553         } else {
 554                 cloud_direct_brightness = direct_brightness;
 555         }
 556         m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
 557                         cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
 558         m_cloudcolor_f = video::SColorf(
 559                         m_cloudcolor_bright_f.r * m_cloud_brightness,
 560                         m_cloudcolor_bright_f.g * m_cloud_brightness,
 561                         m_cloudcolor_bright_f.b * m_cloud_brightness,
 562                         1.0);
 563         if (m_directional_colored_fog) {
 564                 m_cloudcolor_f = m_mix_scolorf(m_cloudcolor_f, video::SColorf(pointcolor), m_horizon_blend() * 0.25);
 565         }
 566
 567 }
 568
 569