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