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 "client/tile.h"
   7 #include "noise.h"            // easeCurve
   8 #include "profiler.h"
   9 #include "util/numeric.h"
  10 #include <cmath>
  11 #include "settings.h"
  12 #include "camera.h"           // CameraModes
  13
  14 //! constructor
  15 Sky::Sky(scene::ISceneNode* parent, scene::ISceneManager* mgr, s32 id,
  16                 ITextureSource *tsrc):
  17                 scene::ISceneNode(parent, mgr, id),
  18                 m_visible(true),
  19                 m_fallback_bg_color(255,255,255,255),
  20                 m_first_update(true),
  21                 m_brightness(0.5),
  22                 m_cloud_brightness(0.5),
  23                 m_bgcolor_bright_f(1,1,1,1),
  24                 m_skycolor_bright_f(1,1,1,1),
  25                 m_cloudcolor_bright_f(1,1,1,1)
  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, tsrc->getTextureForMesh("sunrisebg.png"));
  50         m_materials[2].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  51         //m_materials[2].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
  52
  53         m_sun_texture = tsrc->isKnownSourceImage("sun.png") ?
  54                 tsrc->getTextureForMesh("sun.png") : NULL;
  55         m_moon_texture = tsrc->isKnownSourceImage("moon.png") ?
  56                 tsrc->getTextureForMesh("moon.png") : NULL;
  57         m_sun_tonemap = tsrc->isKnownSourceImage("sun_tonemap.png") ?
  58                 tsrc->getTexture("sun_tonemap.png") : NULL;
  59         m_moon_tonemap = tsrc->isKnownSourceImage("moon_tonemap.png") ?
  60                 tsrc->getTexture("moon_tonemap.png") : NULL;
  61
  62         if (m_sun_texture){
  63                 m_materials[3] = mat;
  64                 m_materials[3].setTexture(0, m_sun_texture);
  65                 m_materials[3].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  66                 if (m_sun_tonemap)
  67                         m_materials[3].Lighting = true;
  68         }
  69         if (m_moon_texture){
  70                 m_materials[4] = mat;
  71                 m_materials[4].setTexture(0, m_moon_texture);
  72                 m_materials[4].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  73                 if (m_moon_tonemap)
  74                         m_materials[4].Lighting = true;
  75         }
  76
  77         for(u32 i=0; i<SKY_STAR_COUNT; i++){
  78                 m_stars[i] = v3f(
  79                         myrand_range(-10000,10000),
  80                         myrand_range(-10000,10000),
  81                         myrand_range(-10000,10000)
  82                 );
  83                 m_stars[i].normalize();
  84         }
  85
  86         m_directional_colored_fog = g_settings->getBool("directional_colored_fog");
  87 }
  88
  89 void Sky::OnRegisterSceneNode()
  90 {
  91         if (IsVisible)
  92                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
  93
  94         scene::ISceneNode::OnRegisterSceneNode();
  95 }
  96
  97 const core::aabbox3d<f32>& Sky::getBoundingBox() const
  98 {
  99         return Box;
 100 }
 101
 102 //! renders the node.
 103 void Sky::render()
 104 {
 105         if(!m_visible)
 106                 return;
 107
 108         video::IVideoDriver* driver = SceneManager->getVideoDriver();
 109         scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
 110
 111         if (!camera || !driver)
 112                 return;
 113
 114         ScopeProfiler sp(g_profiler, "Sky::render()", SPT_AVG);
 115
 116         // draw perspective skybox
 117
 118         core::matrix4 translate(AbsoluteTransformation);
 119         translate.setTranslation(camera->getAbsolutePosition());
 120
 121         // Draw the sky box between the near and far clip plane
 122         const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
 123         core::matrix4 scale;
 124         scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
 125
 126         driver->setTransform(video::ETS_WORLD, translate * scale);
 127
 128         if(m_sunlight_seen)
 129         {
 130                 float sunsize = 0.07;
 131                 video::SColorf suncolor_f(1, 1, 0, 1);
 132                 suncolor_f.r = 1;
 133                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.7+m_time_brightness*(0.5)));
 134                 suncolor_f.b = MYMAX(0.0, m_brightness*0.95);
 135                 video::SColorf suncolor2_f(1, 1, 1, 1);
 136                 suncolor_f.r = 1;
 137                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.85+m_time_brightness*(0.5)));
 138                 suncolor_f.b = MYMAX(0.0, m_brightness);
 139
 140                 float moonsize = 0.04;
 141                 video::SColorf mooncolor_f(0.50, 0.57, 0.65, 1);
 142                 video::SColorf mooncolor2_f(0.85, 0.875, 0.9, 1);
 143
 144                 float nightlength = 0.415;
 145                 float wn = nightlength / 2;
 146                 float wicked_time_of_day = 0;
 147                 if(m_time_of_day > wn && m_time_of_day < 1.0 - wn)
 148                         wicked_time_of_day = (m_time_of_day - wn)/(1.0-wn*2)*0.5 + 0.25;
 149                 else if(m_time_of_day < 0.5)
 150                         wicked_time_of_day = m_time_of_day / wn * 0.25;
 151                 else
 152                         wicked_time_of_day = 1.0 - ((1.0-m_time_of_day) / wn * 0.25);
 153                 /*std::cerr<<"time_of_day="<<m_time_of_day<<" -> "
 154                                 <<"wicked_time_of_day="<<wicked_time_of_day<<std::endl;*/
 155
 156                 video::SColor suncolor = suncolor_f.toSColor();
 157                 video::SColor suncolor2 = suncolor2_f.toSColor();
 158                 video::SColor mooncolor = mooncolor_f.toSColor();
 159                 video::SColor mooncolor2 = mooncolor2_f.toSColor();
 160
 161                 // Calculate offset normalized to the X dimension of a 512x1 px tonemap
 162                 float offset=(1.0-fabs(sin((m_time_of_day - 0.5)*irr::core::PI)))*511;
 163
 164                 if (m_sun_tonemap){
 165                         u8 * texels = (u8 *)m_sun_tonemap->lock();
 166                         video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
 167                         video::SColor texel_color (255,texel->getRed(),texel->getGreen(), texel->getBlue());
 168                         m_sun_tonemap->unlock();
 169                         m_materials[3].EmissiveColor = texel_color;
 170                 }
 171                 if (m_moon_tonemap){
 172                         u8 * texels = (u8 *)m_moon_tonemap->lock();
 173                         video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
 174                         video::SColor texel_color (255,texel->getRed(),texel->getGreen(), texel->getBlue());
 175                         m_moon_tonemap->unlock();
 176                         m_materials[4].EmissiveColor = texel_color;
 177                 }
 178
 179                 const f32 t = 1.0f;
 180                 const f32 o = 0.0f;
 181                 static const u16 indices[4] = {0,1,2,3};
 182                 video::S3DVertex vertices[4];
 183
 184                 driver->setMaterial(m_materials[1]);
 185
 186                 //video::SColor cloudyfogcolor(255,255,255,255);
 187                 video::SColor cloudyfogcolor = m_bgcolor;
 188                 //video::SColor cloudyfogcolor = m_bgcolor.getInterpolated(m_skycolor, 0.5);
 189
 190                 // Draw far cloudy fog thing
 191                 for(u32 j=0; j<4; j++)
 192                 {
 193                         video::SColor c = cloudyfogcolor.getInterpolated(m_skycolor, 0.45);
 194                         vertices[0] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, t);
 195                         vertices[1] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, t);
 196                         vertices[2] = video::S3DVertex( 1, 0.12,-1, 0,0,1, c, o, o);
 197                         vertices[3] = video::S3DVertex(-1, 0.12,-1, 0,0,1, c, t, o);
 198                         for(u32 i=0; i<4; i++){
 199                                 if(j==0)
 200                                         // Don't switch
 201                                         {}
 202                                 else if(j==1)
 203                                         // Switch from -Z (south) to +X (east)
 204                                         vertices[i].Pos.rotateXZBy(90);
 205                                 else if(j==2)
 206                                         // Switch from -Z (south) to -X (west)
 207                                         vertices[i].Pos.rotateXZBy(-90);
 208                                 else
 209                                         // Switch from -Z (south) to -Z (north)
 210                                         vertices[i].Pos.rotateXZBy(-180);
 211                         }
 212                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 213                 }
 214                 for(u32 j=0; j<4; j++)
 215                 {
 216                         video::SColor c = cloudyfogcolor;
 217                         vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
 218                         vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
 219                         vertices[2] = video::S3DVertex( 1, 0.08,-1, 0,0,1, c, o, o);
 220                         vertices[3] = video::S3DVertex(-1, 0.08,-1, 0,0,1, c, t, o);
 221                         for(u32 i=0; i<4; i++){
 222                                 if(j==0)
 223                                         // Don't switch
 224                                         {}
 225                                 else if(j==1)
 226                                         // Switch from -Z (south) to +X (east)
 227                                         vertices[i].Pos.rotateXZBy(90);
 228                                 else if(j==2)
 229                                         // Switch from -Z (south) to -X (west)
 230                                         vertices[i].Pos.rotateXZBy(-90);
 231                                 else
 232                                         // Switch from -Z (south) to -Z (north)
 233                                         vertices[i].Pos.rotateXZBy(-180);
 234                         }
 235                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 236                 }
 237
 238                 driver->setMaterial(m_materials[2]);
 239
 240                 {
 241                         float mid1 = 0.25;
 242                         float mid = (wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1));
 243                         float a_ = 1.0 - fabs(wicked_time_of_day - mid) * 35.0;
 244                         float a = easeCurve(MYMAX(0, MYMIN(1, a_)));
 245                         //std::cerr<<"a_="<<a_<<" a="<<a<<std::endl;
 246                         video::SColor c(255,255,255,255);
 247                         float y = -(1.0 - a) * 0.2;
 248                         vertices[0] = video::S3DVertex(-1,-0.05+y,-1, 0,0,1, c, t, t);
 249                         vertices[1] = video::S3DVertex( 1,-0.05+y,-1, 0,0,1, c, o, t);
 250                         vertices[2] = video::S3DVertex( 1, 0.2+y,-1, 0,0,1, c, o, o);
 251                         vertices[3] = video::S3DVertex(-1, 0.2+y,-1, 0,0,1, c, t, o);
 252                         for(u32 i=0; i<4; i++){
 253                                 if(wicked_time_of_day < 0.5)
 254                                         // Switch from -Z (south) to +X (east)
 255                                         vertices[i].Pos.rotateXZBy(90);
 256                                 else
 257                                         // Switch from -Z (south) to -X (west)
 258                                         vertices[i].Pos.rotateXZBy(-90);
 259                         }
 260                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 261                 }
 262
 263                 // Draw sun
 264                 if(wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85){
 265                         if (!m_sun_texture){
 266                                 driver->setMaterial(m_materials[1]);
 267                                 float d = sunsize * 1.7;
 268                                 video::SColor c = suncolor;
 269                                 c.setAlpha(0.05*255);
 270                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 271                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 272                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 273                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 274                                 for(u32 i=0; i<4; i++){
 275                                         // Switch from -Z (south) to +X (east)
 276                                         vertices[i].Pos.rotateXZBy(90);
 277                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 278                                 }
 279                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 280
 281                                 d = sunsize * 1.2;
 282                                 c = suncolor;
 283                                 c.setAlpha(0.15*255);
 284                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 285                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 286                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 287                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 288                                 for(u32 i=0; i<4; i++){
 289                                         // Switch from -Z (south) to +X (east)
 290                                         vertices[i].Pos.rotateXZBy(90);
 291                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 292                                 }
 293                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 294
 295                                 d = sunsize;
 296                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor, t, t);
 297                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor, o, t);
 298                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor, o, o);
 299                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor, t, o);
 300                                 for(u32 i=0; i<4; i++){
 301                                         // Switch from -Z (south) to +X (east)
 302                                         vertices[i].Pos.rotateXZBy(90);
 303                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 304                                 }
 305                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 306
 307                                 d = sunsize * 0.7;
 308                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, suncolor2, t, t);
 309                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, suncolor2, o, t);
 310                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, suncolor2, o, o);
 311                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, suncolor2, t, o);
 312                                 for(u32 i=0; i<4; i++){
 313                                         // Switch from -Z (south) to +X (east)
 314                                         vertices[i].Pos.rotateXZBy(90);
 315                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 316                                 }
 317                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 318                         } else {
 319                                 driver->setMaterial(m_materials[3]);
 320                                 float d = sunsize * 1.7;
 321                                 video::SColor c;
 322                                 if (m_sun_tonemap)
 323                                         c = video::SColor (0,0,0,0);
 324                                 else
 325                                         c = video::SColor (255,255,255,255);
 326                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 327                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 328                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 329                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 330                                 for(u32 i=0; i<4; i++){
 331                                         // Switch from -Z (south) to +X (east)
 332                                         vertices[i].Pos.rotateXZBy(90);
 333                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 334                                 }
 335                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 336                         }
 337                 }
 338
 339                 // Draw moon
 340                 if(wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7)
 341                 {
 342                         if (!m_moon_texture){
 343                                 driver->setMaterial(m_materials[1]);
 344                                 float d = moonsize * 1.9;
 345                                 video::SColor c = mooncolor;
 346                                 c.setAlpha(0.05*255);
 347                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 348                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 349                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 350                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 351                                 for(u32 i=0; i<4; i++){
 352                                         // Switch from -Z (south) to -X (west)
 353                                         vertices[i].Pos.rotateXZBy(-90);
 354                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 355                                 }
 356                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 357
 358                                 d = moonsize * 1.3;
 359                                 c = mooncolor;
 360                                 c.setAlpha(0.15*255);
 361                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 362                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 363                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 364                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 365                                 for(u32 i=0; i<4; i++){
 366                                         // Switch from -Z (south) to -X (west)
 367                                         vertices[i].Pos.rotateXZBy(-90);
 368                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 369                                 }
 370                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 371
 372                                 d = moonsize;
 373                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor, t, t);
 374                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, mooncolor, o, t);
 375                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, mooncolor, o, o);
 376                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, mooncolor, t, o);
 377                                 for(u32 i=0; i<4; i++){
 378                                         // Switch from -Z (south) to -X (west)
 379                                         vertices[i].Pos.rotateXZBy(-90);
 380                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 381                                 }
 382                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 383
 384                                 float d2 = moonsize * 0.6;
 385                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, mooncolor2, t, t);
 386                                 vertices[1] = video::S3DVertex( d2,-d,-1, 0,0,1, mooncolor2, o, t);
 387                                 vertices[2] = video::S3DVertex( d2, d2,-1, 0,0,1, mooncolor2, o, o);
 388                                 vertices[3] = video::S3DVertex(-d, d2,-1, 0,0,1, mooncolor2, t, o);
 389                                 for(u32 i=0; i<4; i++){
 390                                         // Switch from -Z (south) to -X (west)
 391                                         vertices[i].Pos.rotateXZBy(-90);
 392                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 393                                 }
 394                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 395                         } else {
 396                                 driver->setMaterial(m_materials[4]);
 397                                 float d = moonsize * 1.9;
 398                                 video::SColor c;
 399                                 if (m_moon_tonemap)
 400                                         c = video::SColor (0,0,0,0);
 401                                 else
 402                                         c = video::SColor (255,255,255,255);
 403                                 vertices[0] = video::S3DVertex(-d,-d,-1, 0,0,1, c, t, t);
 404                                 vertices[1] = video::S3DVertex( d,-d,-1, 0,0,1, c, o, t);
 405                                 vertices[2] = video::S3DVertex( d, d,-1, 0,0,1, c, o, o);
 406                                 vertices[3] = video::S3DVertex(-d, d,-1, 0,0,1, c, t, o);
 407                                 for(u32 i=0; i<4; i++){
 408                                         // Switch from -Z (south) to -X (west)
 409                                         vertices[i].Pos.rotateXZBy(-90);
 410                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 411                                 }
 412                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 413                         }
 414                 }
 415
 416                 // Stars
 417                 driver->setMaterial(m_materials[1]);
 418                 do{
 419                         float starbrightness = MYMAX(0, MYMIN(1,
 420                                         (0.285 - fabs(wicked_time_of_day < 0.5 ?
 421                                         wicked_time_of_day : (1.0 - wicked_time_of_day))) * 10));
 422                         float f = starbrightness;
 423                         float d = 0.007;
 424                         video::SColor starcolor(255, f*90,f*90,f*90);
 425                         if(starcolor.getBlue() < m_skycolor.getBlue())
 426                                 break;
 427                         u16 indices[SKY_STAR_COUNT*4];
 428                         video::S3DVertex vertices[SKY_STAR_COUNT*4];
 429                         for(u32 i=0; i<SKY_STAR_COUNT; i++){
 430                                 indices[i*4+0] = i*4+0;
 431                                 indices[i*4+1] = i*4+1;
 432                                 indices[i*4+2] = i*4+2;
 433                                 indices[i*4+3] = i*4+3;
 434                                 v3f p = m_stars[i];
 435                                 core::CMatrix4<f32> a;
 436                                 a.buildRotateFromTo(v3f(0,1,0), v3f(d,1+d/2,0));
 437                                 v3f p1 = p;
 438                                 a.rotateVect(p1);
 439                                 a.buildRotateFromTo(v3f(0,1,0), v3f(d,1,d));
 440                                 v3f p2 = p;
 441                                 a.rotateVect(p2);
 442                                 a.buildRotateFromTo(v3f(0,1,0), v3f(0,1-d/2,d));
 443                                 v3f p3 = p;
 444                                 a.rotateVect(p3);
 445                                 p.rotateXYBy(wicked_time_of_day * 360 - 90);
 446                                 p1.rotateXYBy(wicked_time_of_day * 360 - 90);
 447                                 p2.rotateXYBy(wicked_time_of_day * 360 - 90);
 448                                 p3.rotateXYBy(wicked_time_of_day * 360 - 90);
 449                                 vertices[i*4+0].Pos = p;
 450                                 vertices[i*4+0].Color = starcolor;
 451                                 vertices[i*4+1].Pos = p1;
 452                                 vertices[i*4+1].Color = starcolor;
 453                                 vertices[i*4+2].Pos = p2;
 454                                 vertices[i*4+2].Color = starcolor;
 455                                 vertices[i*4+3].Pos = p3;
 456                                 vertices[i*4+3].Color = starcolor;
 457                         }
 458                         driver->drawVertexPrimitiveList(vertices, SKY_STAR_COUNT*4,
 459                                         indices, SKY_STAR_COUNT, video::EVT_STANDARD,
 460                                         scene::EPT_QUADS, video::EIT_16BIT);
 461                 }while(0);
 462
 463                 for(u32 j=0; j<2; j++)
 464                 {
 465                         //video::SColor c = m_skycolor;
 466                         video::SColor c = cloudyfogcolor;
 467                         vertices[0] = video::S3DVertex(-1,-1.0,-1, 0,0,1, c, t, t);
 468                         vertices[1] = video::S3DVertex( 1,-1.0,-1, 0,0,1, c, o, t);
 469                         vertices[2] = video::S3DVertex( 1,-0.02,-1, 0,0,1, c, o, o);
 470                         vertices[3] = video::S3DVertex(-1,-0.02,-1, 0,0,1, c, t, o);
 471                         for(u32 i=0; i<4; i++){
 472                                 //if(wicked_time_of_day < 0.5)
 473                                 if(j==0)
 474                                         // Switch from -Z (south) to +X (east)
 475                                         vertices[i].Pos.rotateXZBy(90);
 476                                 else
 477                                         // Switch from -Z (south) to -X (west)
 478                                         vertices[i].Pos.rotateXZBy(-90);
 479                         }
 480                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 481                 }
 482         }
 483 }
 484
 485 void Sky::update(float time_of_day, float time_brightness,
 486                 float direct_brightness, bool sunlight_seen,
 487                 CameraMode cam_mode, float yaw, float pitch)
 488 {
 489         // Stabilize initial brightness and color values by flooding updates
 490         if(m_first_update){
 491                 /*dstream<<"First update with time_of_day="<<time_of_day
 492                                 <<" time_brightness="<<time_brightness
 493                                 <<" direct_brightness="<<direct_brightness
 494                                 <<" sunlight_seen="<<sunlight_seen<<std::endl;*/
 495                 m_first_update = false;
 496                 for(u32 i=0; i<100; i++){
 497                         update(time_of_day, time_brightness, direct_brightness,
 498                                         sunlight_seen, cam_mode, yaw, pitch);
 499                 }
 500                 return;
 501         }
 502
 503         m_time_of_day = time_of_day;
 504         m_time_brightness = time_brightness;
 505         m_sunlight_seen = sunlight_seen;
 506
 507         bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
 508
 509         //video::SColorf bgcolor_bright_normal_f(170./255,200./255,230./255, 1.0);
 510         video::SColorf bgcolor_bright_normal_f(155./255,193./255,240./255, 1.0);
 511         video::SColorf bgcolor_bright_indoor_f(100./255,100./255,100./255, 1.0);
 512         //video::SColorf bgcolor_bright_dawn_f(0.666,200./255*0.7,230./255*0.5,1.0);
 513         //video::SColorf bgcolor_bright_dawn_f(0.666,0.549,0.220,1.0);
 514         //video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.0, 1.0);
 515         //video::SColorf bgcolor_bright_dawn_f(0.666*1.2,0.549*1.0,0.220*1.2,1.0);
 516         video::SColorf bgcolor_bright_dawn_f
 517                         (155./255*1.2,193./255,240./255, 1.0);
 518
 519         video::SColorf skycolor_bright_normal_f =
 520                         video::SColor(255, 140, 186, 250);
 521         video::SColorf skycolor_bright_dawn_f =
 522                         video::SColor(255, 180, 186, 250);
 523
 524         video::SColorf cloudcolor_bright_normal_f =
 525                         video::SColor(255, 240,240,255);
 526         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.591, 0.4);
 527         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
 528         //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
 529         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.875, 0.75);
 530
 531         float cloud_color_change_fraction = 0.95;
 532         if(sunlight_seen){
 533                 if(fabs(time_brightness - m_brightness) < 0.2){
 534                         m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
 535                 } else {
 536                         m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
 537                         cloud_color_change_fraction = 0.0;
 538                 }
 539         }
 540         else{
 541                 if(direct_brightness < m_brightness)
 542                         m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
 543                 else
 544                         m_brightness = m_brightness * 0.98 + direct_brightness * 0.02;
 545         }
 546
 547         m_clouds_visible = true;
 548         float color_change_fraction = 0.98;
 549         if(sunlight_seen){
 550                 if(is_dawn){
 551                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 552                                         bgcolor_bright_dawn_f, color_change_fraction);
 553                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 554                                         skycolor_bright_dawn_f, color_change_fraction);
 555                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 556                                         cloudcolor_bright_dawn_f, color_change_fraction);
 557                 } else {
 558                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 559                                         bgcolor_bright_normal_f, color_change_fraction);
 560                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 561                                         skycolor_bright_normal_f, color_change_fraction);
 562                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 563                                         cloudcolor_bright_normal_f, color_change_fraction);
 564                 }
 565         } else {
 566                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 567                                 bgcolor_bright_indoor_f, color_change_fraction);
 568                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 569                                 bgcolor_bright_indoor_f, color_change_fraction);
 570                 m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 571                                 cloudcolor_bright_normal_f, color_change_fraction);
 572                 m_clouds_visible = false;
 573         }
 574
 575         video::SColor bgcolor_bright = m_bgcolor_bright_f.toSColor();
 576         m_bgcolor = video::SColor(
 577                 255,
 578                 bgcolor_bright.getRed() * m_brightness,
 579                 bgcolor_bright.getGreen() * m_brightness,
 580                 bgcolor_bright.getBlue() * m_brightness);
 581
 582         video::SColor skycolor_bright = m_skycolor_bright_f.toSColor();
 583         m_skycolor = video::SColor(
 584                 255,
 585                 skycolor_bright.getRed() * m_brightness,
 586                 skycolor_bright.getGreen() * m_brightness,
 587                 skycolor_bright.getBlue() * m_brightness);
 588
 589         // Horizon coloring based on sun and moon direction during sunset and sunrise
 590         video::SColor pointcolor = video::SColor(255, 255, 255, m_bgcolor.getAlpha());
 591         if (m_directional_colored_fog) {
 592                 if (m_horizon_blend() != 0)
 593                 {
 594                         // calculate hemisphere value from yaw, (inverted in third person front view)
 595                         s8 dir_factor = 1;
 596                         if (cam_mode > CAMERA_MODE_THIRD)
 597                                 dir_factor = -1;
 598                         f32 pointcolor_blend = wrapDegrees_0_360( yaw*dir_factor + 90);
 599                         if (pointcolor_blend > 180)
 600                                 pointcolor_blend = 360 - pointcolor_blend;
 601                         pointcolor_blend /= 180;
 602                         // bound view angle to determine where transition starts and ends
 603                         pointcolor_blend = rangelim(1 - pointcolor_blend * 1.375, 0, 1 / 1.375) * 1.375;
 604                         // combine the colors when looking up or down, otherwise turning looks weird
 605                         pointcolor_blend += (0.5 - pointcolor_blend) * (1 - MYMIN((90 - std::abs(pitch)) / 90 * 1.5, 1));
 606                         // invert direction to match where the sun and moon are rising
 607                         if (m_time_of_day > 0.5)
 608                                 pointcolor_blend = 1 - pointcolor_blend;
 609                         // horizon colors of sun and moon
 610                         f32 pointcolor_light = rangelim(m_time_brightness * 3, 0.2, 1);
 611
 612                         video::SColorf pointcolor_sun_f(1, 1, 1, 1);
 613                         if (m_sun_tonemap)
 614                         {
 615                                 pointcolor_sun_f.r = pointcolor_light * (float)m_materials[3].EmissiveColor.getRed() / 255;
 616                                 pointcolor_sun_f.b = pointcolor_light * (float)m_materials[3].EmissiveColor.getBlue() / 255;
 617                                 pointcolor_sun_f.g = pointcolor_light * (float)m_materials[3].EmissiveColor.getGreen() / 255;
 618                         }
 619                         else
 620                         {
 621                                 pointcolor_sun_f.r = pointcolor_light * 1;
 622                                 pointcolor_sun_f.b = pointcolor_light * (0.25 + (rangelim(m_time_brightness, 0.25, 0.75) - 0.25) * 2 * 0.75);
 623                                 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);
 624                         }
 625
 626                         video::SColorf pointcolor_moon_f(0.5 * pointcolor_light, 0.6 * pointcolor_light, 0.8 * pointcolor_light, 1);
 627                         if (m_moon_tonemap)
 628                         {
 629                                 pointcolor_moon_f.r = pointcolor_light * (float)m_materials[4].EmissiveColor.getRed() / 255;
 630                                 pointcolor_moon_f.b = pointcolor_light * (float)m_materials[4].EmissiveColor.getBlue() / 255;
 631                                 pointcolor_moon_f.g = pointcolor_light * (float)m_materials[4].EmissiveColor.getGreen() / 255;
 632                         }
 633
 634                         video::SColor pointcolor_sun = pointcolor_sun_f.toSColor();
 635                         video::SColor pointcolor_moon = pointcolor_moon_f.toSColor();
 636                         // calculate the blend color
 637                         pointcolor = m_mix_scolor(pointcolor_moon, pointcolor_sun, pointcolor_blend);
 638                 }
 639                 m_bgcolor = m_mix_scolor(m_bgcolor, pointcolor, m_horizon_blend() * 0.5);
 640                 m_skycolor = m_mix_scolor(m_skycolor, pointcolor, m_horizon_blend() * 0.25);
 641         }
 642
 643         float cloud_direct_brightness = 0;
 644         if(sunlight_seen) {
 645                 if (!m_directional_colored_fog) {
 646                         cloud_direct_brightness = time_brightness;
 647                         if(time_brightness >= 0.2 && time_brightness < 0.7)
 648                                 cloud_direct_brightness *= 1.3;
 649                 }
 650                 else {
 651                         cloud_direct_brightness = MYMIN(m_horizon_blend() * 0.15 + m_time_brightness, 1);
 652                 }
 653         } else {
 654                 cloud_direct_brightness = direct_brightness;
 655         }
 656         m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
 657                         cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
 658         m_cloudcolor_f = video::SColorf(
 659                         m_cloudcolor_bright_f.r * m_cloud_brightness,
 660                         m_cloudcolor_bright_f.g * m_cloud_brightness,
 661                         m_cloudcolor_bright_f.b * m_cloud_brightness,
 662                         1.0);
 663         if (m_directional_colored_fog) {
 664                 m_cloudcolor_f = m_mix_scolorf(m_cloudcolor_f, video::SColorf(pointcolor), m_horizon_blend() * 0.25);
 665         }
 666
 667 }
 668
 669