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 "client/renderingengine.h"
  12 #include "settings.h"
  13 #include "camera.h"  // CameraModes
  14
  15
  16 Sky::Sky(s32 id, ITextureSource *tsrc):
  17                 scene::ISceneNode(RenderingEngine::get_scene_manager()->getRootSceneNode(),
  18                         RenderingEngine::get_scene_manager(), id)
  19 {
  20         setAutomaticCulling(scene::EAC_OFF);
  21         m_box.MaxEdge.set(0, 0, 0);
  22         m_box.MinEdge.set(0, 0, 0);
  23
  24         // Create material
  25
  26         video::SMaterial mat;
  27         mat.Lighting = false;
  28         mat.ZBuffer = video::ECFN_NEVER;
  29         mat.ZWriteEnable = false;
  30         mat.AntiAliasing = 0;
  31         mat.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
  32         mat.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
  33         mat.BackfaceCulling = false;
  34
  35         m_materials[0] = mat;
  36
  37         m_materials[1] = mat;
  38         //m_materials[1].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
  39         m_materials[1].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  40
  41         m_materials[2] = mat;
  42         m_materials[2].setTexture(0, tsrc->getTextureForMesh("sunrisebg.png"));
  43         m_materials[2].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  44         //m_materials[2].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
  45
  46         m_sun_texture = tsrc->isKnownSourceImage("sun.png") ?
  47                 tsrc->getTextureForMesh("sun.png") : NULL;
  48         m_moon_texture = tsrc->isKnownSourceImage("moon.png") ?
  49                 tsrc->getTextureForMesh("moon.png") : NULL;
  50         m_sun_tonemap = tsrc->isKnownSourceImage("sun_tonemap.png") ?
  51                 tsrc->getTexture("sun_tonemap.png") : NULL;
  52         m_moon_tonemap = tsrc->isKnownSourceImage("moon_tonemap.png") ?
  53                 tsrc->getTexture("moon_tonemap.png") : NULL;
  54
  55         if (m_sun_texture) {
  56                 m_materials[3] = mat;
  57                 m_materials[3].setTexture(0, m_sun_texture);
  58                 m_materials[3].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  59                 if (m_sun_tonemap)
  60                         m_materials[3].Lighting = true;
  61         }
  62
  63         if (m_moon_texture) {
  64                 m_materials[4] = mat;
  65                 m_materials[4].setTexture(0, m_moon_texture);
  66                 m_materials[4].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  67                 if (m_moon_tonemap)
  68                         m_materials[4].Lighting = true;
  69         }
  70
  71         for (v3f &star : m_stars) {
  72                 star = v3f(
  73                         myrand_range(-10000, 10000),
  74                         myrand_range(-10000, 10000),
  75                         myrand_range(-10000, 10000)
  76                 );
  77                 star.normalize();
  78         }
  79
  80         m_directional_colored_fog = g_settings->getBool("directional_colored_fog");
  81 }
  82
  83
  84 void Sky::OnRegisterSceneNode()
  85 {
  86         if (IsVisible)
  87                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
  88
  89         scene::ISceneNode::OnRegisterSceneNode();
  90 }
  91
  92
  93 void Sky::render()
  94 {
  95         if (!m_visible)
  96                 return;
  97
  98         video::IVideoDriver* driver = SceneManager->getVideoDriver();
  99         scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
 100
 101         if (!camera || !driver)
 102                 return;
 103
 104         ScopeProfiler sp(g_profiler, "Sky::render()", SPT_AVG);
 105
 106         // Draw perspective skybox
 107
 108         core::matrix4 translate(AbsoluteTransformation);
 109         translate.setTranslation(camera->getAbsolutePosition());
 110
 111         // Draw the sky box between the near and far clip plane
 112         const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
 113         core::matrix4 scale;
 114         scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
 115
 116         driver->setTransform(video::ETS_WORLD, translate * scale);
 117
 118         if (m_sunlight_seen) {
 119                 float sunsize = 0.07;
 120                 video::SColorf suncolor_f(1, 1, 0, 1);
 121                 suncolor_f.r = 1;
 122                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.7 + m_time_brightness * 0.5));
 123                 suncolor_f.b = MYMAX(0.0, m_brightness * 0.95);
 124                 video::SColorf suncolor2_f(1, 1, 1, 1);
 125                 suncolor_f.r = 1;
 126                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.85 + m_time_brightness * 0.5));
 127                 suncolor_f.b = MYMAX(0.0, m_brightness);
 128
 129                 float moonsize = 0.04;
 130                 video::SColorf mooncolor_f(0.50, 0.57, 0.65, 1);
 131                 video::SColorf mooncolor2_f(0.85, 0.875, 0.9, 1);
 132
 133                 float nightlength = 0.415;
 134                 float wn = nightlength / 2;
 135                 float wicked_time_of_day = 0;
 136                 if (m_time_of_day > wn && m_time_of_day < 1.0 - wn)
 137                         wicked_time_of_day = (m_time_of_day - wn) / (1.0 - wn * 2) * 0.5 + 0.25;
 138                 else if (m_time_of_day < 0.5)
 139                         wicked_time_of_day = m_time_of_day / wn * 0.25;
 140                 else
 141                         wicked_time_of_day = 1.0 - ((1.0 - m_time_of_day) / wn * 0.25);
 142                 /*std::cerr<<"time_of_day="<<m_time_of_day<<" -> "
 143                                 <<"wicked_time_of_day="<<wicked_time_of_day<<std::endl;*/
 144
 145                 video::SColor suncolor = suncolor_f.toSColor();
 146                 video::SColor suncolor2 = suncolor2_f.toSColor();
 147                 video::SColor mooncolor = mooncolor_f.toSColor();
 148                 video::SColor mooncolor2 = mooncolor2_f.toSColor();
 149
 150                 // Calculate offset normalized to the X dimension of a 512x1 px tonemap
 151                 float offset = (1.0 - fabs(sin((m_time_of_day - 0.5) * irr::core::PI))) * 511;
 152
 153                 if (m_sun_tonemap) {
 154                         u8 * texels = (u8 *)m_sun_tonemap->lock();
 155                         video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
 156                         video::SColor texel_color (255, texel->getRed(),
 157                                 texel->getGreen(), texel->getBlue());
 158                         m_sun_tonemap->unlock();
 159                         m_materials[3].EmissiveColor = texel_color;
 160                 }
 161
 162                 if (m_moon_tonemap) {
 163                         u8 * texels = (u8 *)m_moon_tonemap->lock();
 164                         video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
 165                         video::SColor texel_color (255, texel->getRed(),
 166                                 texel->getGreen(), texel->getBlue());
 167                         m_moon_tonemap->unlock();
 168                         m_materials[4].EmissiveColor = texel_color;
 169                 }
 170
 171                 const f32 t = 1.0f;
 172                 const f32 o = 0.0f;
 173                 static const u16 indices[4] = {0, 1, 2, 3};
 174                 video::S3DVertex vertices[4];
 175
 176                 driver->setMaterial(m_materials[1]);
 177
 178                 video::SColor cloudyfogcolor = m_bgcolor;
 179
 180                 // Draw far cloudy fog thing blended with skycolor
 181                 for (u32 j = 0; j < 4; j++) {
 182                         video::SColor c = cloudyfogcolor.getInterpolated(m_skycolor, 0.45);
 183                         vertices[0] = video::S3DVertex(-1, 0.08, -1, 0, 0, 1, c, t, t);
 184                         vertices[1] = video::S3DVertex( 1, 0.08, -1, 0, 0, 1, c, o, t);
 185                         vertices[2] = video::S3DVertex( 1, 0.12, -1, 0, 0, 1, c, o, o);
 186                         vertices[3] = video::S3DVertex(-1, 0.12, -1, 0, 0, 1, c, t, o);
 187                         for (video::S3DVertex &vertex : vertices) {
 188                                 if (j == 0)
 189                                         // Don't switch
 190                                         {}
 191                                 else if (j == 1)
 192                                         // Switch from -Z (south) to +X (east)
 193                                         vertex.Pos.rotateXZBy(90);
 194                                 else if (j == 2)
 195                                         // Switch from -Z (south) to -X (west)
 196                                         vertex.Pos.rotateXZBy(-90);
 197                                 else
 198                                         // Switch from -Z (south) to +Z (north)
 199                                         vertex.Pos.rotateXZBy(-180);
 200                         }
 201                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 202                 }
 203
 204                 // Draw far cloudy fog thing
 205                 for (u32 j = 0; j < 4; j++) {
 206                         video::SColor c = cloudyfogcolor;
 207                         vertices[0] = video::S3DVertex(-1, -1.0, -1, 0, 0, 1, c, t, t);
 208                         vertices[1] = video::S3DVertex( 1, -1.0, -1, 0, 0, 1, c, o, t);
 209                         vertices[2] = video::S3DVertex( 1, 0.08, -1, 0, 0, 1, c, o, o);
 210                         vertices[3] = video::S3DVertex(-1, 0.08, -1, 0, 0, 1, c, t, o);
 211                         for (video::S3DVertex &vertex : vertices) {
 212                                 if (j == 0)
 213                                         // Don't switch
 214                                         {}
 215                                 else if (j == 1)
 216                                         // Switch from -Z (south) to +X (east)
 217                                         vertex.Pos.rotateXZBy(90);
 218                                 else if (j == 2)
 219                                         // Switch from -Z (south) to -X (west)
 220                                         vertex.Pos.rotateXZBy(-90);
 221                                 else
 222                                         // Switch from -Z (south) to +Z (north)
 223                                         vertex.Pos.rotateXZBy(-180);
 224                         }
 225                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 226                 }
 227
 228                 // Draw bottom far cloudy fog thing
 229                 video::SColor c = cloudyfogcolor;
 230                 vertices[0] = video::S3DVertex(-1, -1.0, -1, 0, 1, 0, c, t, t);
 231                 vertices[1] = video::S3DVertex( 1, -1.0, -1, 0, 1, 0, c, o, t);
 232                 vertices[2] = video::S3DVertex( 1, -1.0, 1, 0, 1, 0, c, o, o);
 233                 vertices[3] = video::S3DVertex(-1, -1.0, 1, 0, 1, 0, c, t, o);
 234                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 235
 236                 // If sun, moon and stars are (temporarily) disabled, abort here
 237                 if (!m_bodies_visible)
 238                         return;
 239
 240                 driver->setMaterial(m_materials[2]);
 241
 242                 // Draw sunrise/sunset horizon glow texture (textures/base/pack/sunrisebg.png)
 243                 {
 244                         float mid1 = 0.25;
 245                         float mid = wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1);
 246                         float a_ = 1.0 - fabs(wicked_time_of_day - mid) * 35.0;
 247                         float a = easeCurve(MYMAX(0, MYMIN(1, a_)));
 248                         //std::cerr<<"a_="<<a_<<" a="<<a<<std::endl;
 249                         video::SColor c(255, 255, 255, 255);
 250                         float y = -(1.0 - a) * 0.22;
 251                         vertices[0] = video::S3DVertex(-1, -0.05 + y, -1, 0, 0, 1, c, t, t);
 252                         vertices[1] = video::S3DVertex( 1, -0.05 + y, -1, 0, 0, 1, c, o, t);
 253                         vertices[2] = video::S3DVertex( 1,   0.2 + y, -1, 0, 0, 1, c, o, o);
 254                         vertices[3] = video::S3DVertex(-1,   0.2 + y, -1, 0, 0, 1, c, t, o);
 255                         for (video::S3DVertex &vertex : vertices) {
 256                                 if (wicked_time_of_day < 0.5)
 257                                         // Switch from -Z (south) to +X (east)
 258                                         vertex.Pos.rotateXZBy(90);
 259                                 else
 260                                         // Switch from -Z (south) to -X (west)
 261                                         vertex.Pos.rotateXZBy(-90);
 262                         }
 263                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 264                 }
 265
 266                 // Draw sun
 267                 if (wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85) {
 268                         if (!m_sun_texture) {
 269                                 driver->setMaterial(m_materials[1]);
 270                                 float d = sunsize * 1.7;
 271                                 video::SColor c = suncolor;
 272                                 c.setAlpha(0.05 * 255);
 273                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 274                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 275                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 276                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 277                                 for (video::S3DVertex &vertex : vertices) {
 278                                         // Switch from -Z (south) to +X (east)
 279                                         vertex.Pos.rotateXZBy(90);
 280                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 281                                 }
 282                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 283
 284                                 d = sunsize * 1.2;
 285                                 c = suncolor;
 286                                 c.setAlpha(0.15 * 255);
 287                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 288                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 289                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 290                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 291                                 for (video::S3DVertex &vertex : vertices) {
 292                                         // Switch from -Z (south) to +X (east)
 293                                         vertex.Pos.rotateXZBy(90);
 294                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 295                                 }
 296                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 297
 298                                 d = sunsize;
 299                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, suncolor, t, t);
 300                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, suncolor, o, t);
 301                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, suncolor, o, o);
 302                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, suncolor, t, o);
 303                                 for (video::S3DVertex &vertex : vertices) {
 304                                         // Switch from -Z (south) to +X (east)
 305                                         vertex.Pos.rotateXZBy(90);
 306                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 307                                 }
 308                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 309
 310                                 d = sunsize * 0.7;
 311                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, suncolor2, t, t);
 312                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, suncolor2, o, t);
 313                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, suncolor2, o, o);
 314                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, suncolor2, t, o);
 315                                 for (video::S3DVertex &vertex : vertices) {
 316                                         // Switch from -Z (south) to +X (east)
 317                                         vertex.Pos.rotateXZBy(90);
 318                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 319                                 }
 320                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 321                         } else {
 322                                 driver->setMaterial(m_materials[3]);
 323                                 float d = sunsize * 1.7;
 324                                 video::SColor c;
 325                                 if (m_sun_tonemap)
 326                                         c = video::SColor (0, 0, 0, 0);
 327                                 else
 328                                         c = video::SColor (255, 255, 255, 255);
 329                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 330                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 331                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 332                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 333                                 for (video::S3DVertex &vertex : vertices) {
 334                                         // Switch from -Z (south) to +X (east)
 335                                         vertex.Pos.rotateXZBy(90);
 336                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 337                                 }
 338                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 339                         }
 340                 }
 341
 342                 // Draw moon
 343                 if (wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7) {
 344                         if (!m_moon_texture) {
 345                                 driver->setMaterial(m_materials[1]);
 346                                 float d = moonsize * 1.9;
 347                                 video::SColor c = mooncolor;
 348                                 c.setAlpha(0.05 * 255);
 349                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 350                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 351                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 352                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 353                                 for (video::S3DVertex &vertex : vertices) {
 354                                         // Switch from -Z (south) to -X (west)
 355                                         vertex.Pos.rotateXZBy(-90);
 356                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 357                                 }
 358                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 359
 360                                 d = moonsize * 1.3;
 361                                 c = mooncolor;
 362                                 c.setAlpha(0.15 * 255);
 363                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 364                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 365                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 366                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 367                                 for (video::S3DVertex &vertex : vertices) {
 368                                         // Switch from -Z (south) to -X (west)
 369                                         vertex.Pos.rotateXZBy(-90);
 370                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 371                                 }
 372                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 373
 374                                 d = moonsize;
 375                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, mooncolor, t, t);
 376                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, mooncolor, o, t);
 377                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, mooncolor, o, o);
 378                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, mooncolor, t, o);
 379                                 for (video::S3DVertex &vertex : vertices) {
 380                                         // Switch from -Z (south) to -X (west)
 381                                         vertex.Pos.rotateXZBy(-90);
 382                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 383                                 }
 384                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 385
 386                                 float d2 = moonsize * 0.6;
 387                                 vertices[0] = video::S3DVertex(-d, -d,  -1, 0, 0, 1, mooncolor2, t, t);
 388                                 vertices[1] = video::S3DVertex( d2,-d,  -1, 0, 0, 1, mooncolor2, o, t);
 389                                 vertices[2] = video::S3DVertex( d2, d2, -1, 0, 0, 1, mooncolor2, o, o);
 390                                 vertices[3] = video::S3DVertex(-d,  d2, -1, 0, 0, 1, mooncolor2, t, o);
 391                                 for (video::S3DVertex &vertex : vertices) {
 392                                         // Switch from -Z (south) to -X (west)
 393                                         vertex.Pos.rotateXZBy(-90);
 394                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 395                                 }
 396                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 397                         } else {
 398                                 driver->setMaterial(m_materials[4]);
 399                                 float d = moonsize * 1.9;
 400                                 video::SColor c;
 401                                 if (m_moon_tonemap)
 402                                         c = video::SColor (0, 0, 0, 0);
 403                                 else
 404                                         c = video::SColor (255, 255, 255, 255);
 405                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 406                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 407                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 408                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 409                                 for (video::S3DVertex &vertex : vertices) {
 410                                         // Switch from -Z (south) to -X (west)
 411                                         vertex.Pos.rotateXZBy(-90);
 412                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 413                                 }
 414                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 415                         }
 416                 }
 417
 418                 // Draw stars
 419                 do {
 420                         driver->setMaterial(m_materials[1]);
 421                         float starbrightness = MYMAX(0, MYMIN(1,
 422                                 (0.285 - fabs(wicked_time_of_day < 0.5 ?
 423                                 wicked_time_of_day : (1.0 - wicked_time_of_day))) * 10));
 424                         float f = starbrightness;
 425                         float d = 0.007;
 426                         video::SColor starcolor(255, f * 90, f * 90, f * 90);
 427                         if (starcolor.getBlue() < m_skycolor.getBlue())
 428                                 break;
 429                         u16 indices[SKY_STAR_COUNT * 4];
 430                         video::S3DVertex vertices[SKY_STAR_COUNT * 4];
 431                         for (u32 i = 0; i < SKY_STAR_COUNT; i++) {
 432                                 indices[i * 4 + 0] = i * 4 + 0;
 433                                 indices[i * 4 + 1] = i * 4 + 1;
 434                                 indices[i * 4 + 2] = i * 4 + 2;
 435                                 indices[i * 4 + 3] = i * 4 + 3;
 436                                 v3f p = m_stars[i];
 437                                 core::CMatrix4<f32> a;
 438                                 a.buildRotateFromTo(v3f(0, 1, 0), v3f(d, 1 + d / 2, 0));
 439                                 v3f p1 = p;
 440                                 a.rotateVect(p1);
 441                                 a.buildRotateFromTo(v3f(0, 1, 0), v3f(d, 1, d));
 442                                 v3f p2 = p;
 443                                 a.rotateVect(p2);
 444                                 a.buildRotateFromTo(v3f(0, 1, 0), v3f(0, 1 - d / 2, d));
 445                                 v3f p3 = p;
 446                                 a.rotateVect(p3);
 447                                 p.rotateXYBy(wicked_time_of_day * 360 - 90);
 448                                 p1.rotateXYBy(wicked_time_of_day * 360 - 90);
 449                                 p2.rotateXYBy(wicked_time_of_day * 360 - 90);
 450                                 p3.rotateXYBy(wicked_time_of_day * 360 - 90);
 451                                 vertices[i * 4 + 0].Pos = p;
 452                                 vertices[i * 4 + 0].Color = starcolor;
 453                                 vertices[i * 4 + 1].Pos = p1;
 454                                 vertices[i * 4 + 1].Color = starcolor;
 455                                 vertices[i * 4 + 2].Pos = p2;
 456                                 vertices[i * 4 + 2].Color = starcolor;
 457                                 vertices[i * 4 + 3].Pos = p3;
 458                                 vertices[i * 4 + 3].Color = starcolor;
 459                         }
 460                         driver->drawVertexPrimitiveList(vertices, SKY_STAR_COUNT * 4,
 461                                 indices, SKY_STAR_COUNT, video::EVT_STANDARD,
 462                                 scene::EPT_QUADS, video::EIT_16BIT);
 463                 } while(false);
 464
 465                 // Draw far cloudy fog thing below east and west horizons
 466                 for (u32 j = 0; j < 2; j++) {
 467                         video::SColor c = cloudyfogcolor;
 468                         vertices[0] = video::S3DVertex(-1, -1.0,  -1, 0, 0, 1, c, t, t);
 469                         vertices[1] = video::S3DVertex( 1, -1.0,  -1, 0, 0, 1, c, o, t);
 470                         vertices[2] = video::S3DVertex( 1, -0.02, -1, 0, 0, 1, c, o, o);
 471                         vertices[3] = video::S3DVertex(-1, -0.02, -1, 0, 0, 1, c, t, o);
 472                         for (video::S3DVertex &vertex : vertices) {
 473                                 //if (wicked_time_of_day < 0.5)
 474                                 if (j == 0)
 475                                         // Switch from -Z (south) to +X (east)
 476                                         vertex.Pos.rotateXZBy(90);
 477                                 else
 478                                         // Switch from -Z (south) to -X (west)
 479                                         vertex.Pos.rotateXZBy(-90);
 480                         }
 481                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 482                 }
 483         }
 484 }
 485
 486
 487 void Sky::update(float time_of_day, float time_brightness,
 488                 float direct_brightness, bool sunlight_seen,
 489                 CameraMode cam_mode, float yaw, float pitch)
 490 {
 491         // Stabilize initial brightness and color values by flooding updates
 492         if (m_first_update) {
 493                 /*dstream<<"First update with time_of_day="<<time_of_day
 494                                 <<" time_brightness="<<time_brightness
 495                                 <<" direct_brightness="<<direct_brightness
 496                                 <<" sunlight_seen="<<sunlight_seen<<std::endl;*/
 497                 m_first_update = false;
 498                 for (u32 i = 0; i < 100; i++) {
 499                         update(time_of_day, time_brightness, direct_brightness,
 500                                 sunlight_seen, cam_mode, yaw, pitch);
 501                 }
 502                 return;
 503         }
 504
 505         m_time_of_day = time_of_day;
 506         m_time_brightness = time_brightness;
 507         m_sunlight_seen = sunlight_seen;
 508         m_bodies_visible = true;
 509
 510         bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
 511
 512         /*
 513         Development colours
 514
 515         video::SColorf bgcolor_bright_normal_f(170. / 255, 200. / 255, 230. / 255, 1.0);
 516         video::SColorf bgcolor_bright_dawn_f(0.666, 200. / 255 * 0.7, 230. / 255 * 0.5, 1.0);
 517         video::SColorf bgcolor_bright_dawn_f(0.666, 0.549, 0.220, 1.0);
 518         video::SColorf bgcolor_bright_dawn_f(0.666 * 1.2, 0.549 * 1.0, 0.220 * 1.0, 1.0);
 519         video::SColorf bgcolor_bright_dawn_f(0.666 * 1.2, 0.549 * 1.0, 0.220 * 1.2, 1.0);
 520
 521         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.591, 0.4);
 522         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
 523         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
 524         */
 525
 526         video::SColorf bgcolor_bright_normal_f = video::SColor(255, 155, 193, 240);
 527         video::SColorf bgcolor_bright_indoor_f = video::SColor(255, 100, 100, 100);
 528         video::SColorf bgcolor_bright_dawn_f = video::SColor(255, 186, 193, 240);
 529         video::SColorf bgcolor_bright_night_f = video::SColor(255, 64, 144, 255);
 530
 531         video::SColorf skycolor_bright_normal_f = video::SColor(255, 140, 186, 250);
 532         video::SColorf skycolor_bright_dawn_f = video::SColor(255, 180, 186, 250);
 533         video::SColorf skycolor_bright_night_f = video::SColor(255, 0, 107, 255);
 534
 535         // pure white: becomes "diffuse light component" for clouds
 536         video::SColorf cloudcolor_bright_normal_f = video::SColor(255, 255, 255, 255);
 537         // dawn-factoring version of pure white (note: R is above 1.0)
 538         video::SColorf cloudcolor_bright_dawn_f(255.0f/240.0f, 223.0f/240.0f, 191.0f/255.0f);
 539
 540         float cloud_color_change_fraction = 0.95;
 541         if (sunlight_seen) {
 542                 if (fabs(time_brightness - m_brightness) < 0.2) {
 543                         m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
 544                 } else {
 545                         m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
 546                         cloud_color_change_fraction = 0.0;
 547                 }
 548         } else {
 549                 if (direct_brightness < m_brightness)
 550                         m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
 551                 else
 552                         m_brightness = m_brightness * 0.98 + direct_brightness * 0.02;
 553         }
 554
 555         m_clouds_visible = true;
 556         float color_change_fraction = 0.98;
 557         if (sunlight_seen) {
 558                 if (is_dawn) {  // Dawn
 559                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 560                                 bgcolor_bright_dawn_f, color_change_fraction);
 561                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 562                                 skycolor_bright_dawn_f, color_change_fraction);
 563                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 564                                 cloudcolor_bright_dawn_f, color_change_fraction);
 565                 } else {
 566                         if (time_brightness < 0.07) {  // Night
 567                                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 568                                         bgcolor_bright_night_f, color_change_fraction);
 569                                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 570                                         skycolor_bright_night_f, color_change_fraction);
 571                         } else {  // Day
 572                                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 573                                         bgcolor_bright_normal_f, color_change_fraction);
 574                                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 575                                         skycolor_bright_normal_f, color_change_fraction);
 576                         }
 577
 578                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 579                                 cloudcolor_bright_normal_f, color_change_fraction);
 580                 }
 581         } else {
 582                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 583                         bgcolor_bright_indoor_f, color_change_fraction);
 584                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 585                         bgcolor_bright_indoor_f, color_change_fraction);
 586                 m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 587                         cloudcolor_bright_normal_f, color_change_fraction);
 588                 m_clouds_visible = false;
 589         }
 590
 591         video::SColor bgcolor_bright = m_bgcolor_bright_f.toSColor();
 592         m_bgcolor = video::SColor(
 593                 255,
 594                 bgcolor_bright.getRed() * m_brightness,
 595                 bgcolor_bright.getGreen() * m_brightness,
 596                 bgcolor_bright.getBlue() * m_brightness
 597         );
 598
 599         video::SColor skycolor_bright = m_skycolor_bright_f.toSColor();
 600         m_skycolor = video::SColor(
 601                 255,
 602                 skycolor_bright.getRed() * m_brightness,
 603                 skycolor_bright.getGreen() * m_brightness,
 604                 skycolor_bright.getBlue() * m_brightness
 605         );
 606
 607         // Horizon coloring based on sun and moon direction during sunset and sunrise
 608         video::SColor pointcolor = video::SColor(m_bgcolor.getAlpha(), 255, 255, 255);
 609         if (m_directional_colored_fog) {
 610                 if (m_horizon_blend() != 0) {
 611                         // Calculate hemisphere value from yaw, (inverted in third person front view)
 612                         s8 dir_factor = 1;
 613                         if (cam_mode > CAMERA_MODE_THIRD)
 614                                 dir_factor = -1;
 615                         f32 pointcolor_blend = wrapDegrees_0_360(yaw * dir_factor + 90);
 616                         if (pointcolor_blend > 180)
 617                                 pointcolor_blend = 360 - pointcolor_blend;
 618                         pointcolor_blend /= 180;
 619                         // Bound view angle to determine where transition starts and ends
 620                         pointcolor_blend = rangelim(1 - pointcolor_blend * 1.375, 0, 1 / 1.375) *
 621                                 1.375;
 622                         // Combine the colors when looking up or down, otherwise turning looks weird
 623                         pointcolor_blend += (0.5 - pointcolor_blend) *
 624                                 (1 - MYMIN((90 - std::fabs(pitch)) / 90 * 1.5, 1));
 625                         // Invert direction to match where the sun and moon are rising
 626                         if (m_time_of_day > 0.5)
 627                                 pointcolor_blend = 1 - pointcolor_blend;
 628                         // Horizon colors of sun and moon
 629                         f32 pointcolor_light = rangelim(m_time_brightness * 3, 0.2, 1);
 630
 631                         video::SColorf pointcolor_sun_f(1, 1, 1, 1);
 632                         if (m_sun_tonemap) {
 633                                 pointcolor_sun_f.r = pointcolor_light *
 634                                         (float)m_materials[3].EmissiveColor.getRed() / 255;
 635                                 pointcolor_sun_f.b = pointcolor_light *
 636                                         (float)m_materials[3].EmissiveColor.getBlue() / 255;
 637                                 pointcolor_sun_f.g = pointcolor_light *
 638                                         (float)m_materials[3].EmissiveColor.getGreen() / 255;
 639                         } else {
 640                                 pointcolor_sun_f.r = pointcolor_light * 1;
 641                                 pointcolor_sun_f.b = pointcolor_light *
 642                                         (0.25 + (rangelim(m_time_brightness, 0.25, 0.75) - 0.25) * 2 * 0.75);
 643                                 pointcolor_sun_f.g = pointcolor_light * (pointcolor_sun_f.b * 0.375 +
 644                                         (rangelim(m_time_brightness, 0.05, 0.15) - 0.05) * 10 * 0.625);
 645                         }
 646
 647                         video::SColorf pointcolor_moon_f(0.5 * pointcolor_light,
 648                                 0.6 * pointcolor_light, 0.8 * pointcolor_light, 1);
 649                         if (m_moon_tonemap) {
 650                                 pointcolor_moon_f.r = pointcolor_light *
 651                                         (float)m_materials[4].EmissiveColor.getRed() / 255;
 652                                 pointcolor_moon_f.b = pointcolor_light *
 653                                         (float)m_materials[4].EmissiveColor.getBlue() / 255;
 654                                 pointcolor_moon_f.g = pointcolor_light *
 655                                         (float)m_materials[4].EmissiveColor.getGreen() / 255;
 656                         }
 657
 658                         video::SColor pointcolor_sun = pointcolor_sun_f.toSColor();
 659                         video::SColor pointcolor_moon = pointcolor_moon_f.toSColor();
 660                         // Calculate the blend color
 661                         pointcolor = m_mix_scolor(pointcolor_moon, pointcolor_sun, pointcolor_blend);
 662                 }
 663                 m_bgcolor = m_mix_scolor(m_bgcolor, pointcolor, m_horizon_blend() * 0.5);
 664                 m_skycolor = m_mix_scolor(m_skycolor, pointcolor, m_horizon_blend() * 0.25);
 665         }
 666
 667         float cloud_direct_brightness = 0;
 668         if (sunlight_seen) {
 669                 if (!m_directional_colored_fog) {
 670                         cloud_direct_brightness = time_brightness;
 671                         if (time_brightness >= 0.2 && time_brightness < 0.7)
 672                                 cloud_direct_brightness *= 1.3;
 673                 } else {
 674                         cloud_direct_brightness = MYMIN(m_horizon_blend() * 0.15 +
 675                                 m_time_brightness, 1);
 676                 }
 677         } else {
 678                 cloud_direct_brightness = direct_brightness;
 679         }
 680
 681         m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
 682                 cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
 683         m_cloudcolor_f = video::SColorf(
 684                 m_cloudcolor_bright_f.r * m_cloud_brightness,
 685                 m_cloudcolor_bright_f.g * m_cloud_brightness,
 686                 m_cloudcolor_bright_f.b * m_cloud_brightness,
 687                 1.0
 688         );
 689         if (m_directional_colored_fog) {
 690                 m_cloudcolor_f = m_mix_scolorf(m_cloudcolor_f,
 691                         video::SColorf(pointcolor), m_horizon_blend() * 0.25);
 692         }
 693 }