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         m_clouds_enabled = true;
  90 }
  91
  92
  93 void Sky::OnRegisterSceneNode()
  94 {
  95         if (IsVisible)
  96                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
  97
  98         scene::ISceneNode::OnRegisterSceneNode();
  99 }
 100
 101
 102 void Sky::render()
 103 {
 104         if (!m_visible)
 105                 return;
 106
 107         video::IVideoDriver* driver = SceneManager->getVideoDriver();
 108         scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
 109
 110         if (!camera || !driver)
 111                 return;
 112
 113         ScopeProfiler sp(g_profiler, "Sky::render()", SPT_AVG);
 114
 115         // Draw perspective skybox
 116
 117         core::matrix4 translate(AbsoluteTransformation);
 118         translate.setTranslation(camera->getAbsolutePosition());
 119
 120         // Draw the sky box between the near and far clip plane
 121         const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
 122         core::matrix4 scale;
 123         scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
 124
 125         driver->setTransform(video::ETS_WORLD, translate * scale);
 126
 127         if (m_sunlight_seen) {
 128                 float sunsize = 0.07;
 129                 video::SColorf suncolor_f(1, 1, 0, 1);
 130                 suncolor_f.r = 1;
 131                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.7 + m_time_brightness * 0.5));
 132                 suncolor_f.b = MYMAX(0.0, m_brightness * 0.95);
 133                 video::SColorf suncolor2_f(1, 1, 1, 1);
 134                 suncolor_f.r = 1;
 135                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.85 + m_time_brightness * 0.5));
 136                 suncolor_f.b = MYMAX(0.0, m_brightness);
 137
 138                 float moonsize = 0.04;
 139                 video::SColorf mooncolor_f(0.50, 0.57, 0.65, 1);
 140                 video::SColorf mooncolor2_f(0.85, 0.875, 0.9, 1);
 141
 142                 float nightlength = 0.415;
 143                 float wn = nightlength / 2;
 144                 float wicked_time_of_day = 0;
 145                 if (m_time_of_day > wn && m_time_of_day < 1.0 - wn)
 146                         wicked_time_of_day = (m_time_of_day - wn) / (1.0 - wn * 2) * 0.5 + 0.25;
 147                 else if (m_time_of_day < 0.5)
 148                         wicked_time_of_day = m_time_of_day / wn * 0.25;
 149                 else
 150                         wicked_time_of_day = 1.0 - ((1.0 - m_time_of_day) / wn * 0.25);
 151                 /*std::cerr<<"time_of_day="<<m_time_of_day<<" -> "
 152                                 <<"wicked_time_of_day="<<wicked_time_of_day<<std::endl;*/
 153
 154                 video::SColor suncolor = suncolor_f.toSColor();
 155                 video::SColor suncolor2 = suncolor2_f.toSColor();
 156                 video::SColor mooncolor = mooncolor_f.toSColor();
 157                 video::SColor mooncolor2 = mooncolor2_f.toSColor();
 158
 159                 // Calculate offset normalized to the X dimension of a 512x1 px tonemap
 160                 float offset = (1.0 - fabs(sin((m_time_of_day - 0.5) * irr::core::PI))) * 511;
 161
 162                 if (m_sun_tonemap) {
 163                         u8 * texels = (u8 *)m_sun_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_sun_tonemap->unlock();
 168                         m_materials[3].EmissiveColor = texel_color;
 169                 }
 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(),
 175                                 texel->getGreen(), texel->getBlue());
 176                         m_moon_tonemap->unlock();
 177                         m_materials[4].EmissiveColor = texel_color;
 178                 }
 179
 180                 const f32 t = 1.0f;
 181                 const f32 o = 0.0f;
 182                 static const u16 indices[4] = {0, 1, 2, 3};
 183                 video::S3DVertex vertices[4];
 184
 185                 driver->setMaterial(m_materials[1]);
 186
 187                 video::SColor cloudyfogcolor = m_bgcolor;
 188
 189                 // Draw far cloudy fog thing blended with skycolor
 190                 for (u32 j = 0; j < 4; j++) {
 191                         video::SColor c = cloudyfogcolor.getInterpolated(m_skycolor, 0.45);
 192                         vertices[0] = video::S3DVertex(-1, 0.08, -1, 0, 0, 1, c, t, t);
 193                         vertices[1] = video::S3DVertex( 1, 0.08, -1, 0, 0, 1, c, o, t);
 194                         vertices[2] = video::S3DVertex( 1, 0.12, -1, 0, 0, 1, c, o, o);
 195                         vertices[3] = video::S3DVertex(-1, 0.12, -1, 0, 0, 1, c, t, o);
 196                         for (u32 i = 0; i < 4; i++) {
 197                                 if (j == 0)
 198                                         // Don't switch
 199                                         {}
 200                                 else if (j == 1)
 201                                         // Switch from -Z (south) to +X (east)
 202                                         vertices[i].Pos.rotateXZBy(90);
 203                                 else if (j == 2)
 204                                         // Switch from -Z (south) to -X (west)
 205                                         vertices[i].Pos.rotateXZBy(-90);
 206                                 else
 207                                         // Switch from -Z (south) to +Z (north)
 208                                         vertices[i].Pos.rotateXZBy(-180);
 209                         }
 210                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 211                 }
 212
 213                 // Draw far cloudy fog thing
 214                 for (u32 j = 0; j < 4; j++) {
 215                         video::SColor c = cloudyfogcolor;
 216                         vertices[0] = video::S3DVertex(-1, -1.0, -1, 0, 0, 1, c, t, t);
 217                         vertices[1] = video::S3DVertex( 1, -1.0, -1, 0, 0, 1, c, o, t);
 218                         vertices[2] = video::S3DVertex( 1, 0.08, -1, 0, 0, 1, c, o, o);
 219                         vertices[3] = video::S3DVertex(-1, 0.08, -1, 0, 0, 1, c, t, o);
 220                         for (u32 i = 0; i < 4; i++) {
 221                                 if (j == 0)
 222                                         // Don't switch
 223                                         {}
 224                                 else if (j == 1)
 225                                         // Switch from -Z (south) to +X (east)
 226                                         vertices[i].Pos.rotateXZBy(90);
 227                                 else if (j == 2)
 228                                         // Switch from -Z (south) to -X (west)
 229                                         vertices[i].Pos.rotateXZBy(-90);
 230                                 else
 231                                         // Switch from -Z (south) to +Z (north)
 232                                         vertices[i].Pos.rotateXZBy(-180);
 233                         }
 234                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 235                 }
 236
 237                 // Draw bottom far cloudy fog thing
 238                 video::SColor c = cloudyfogcolor;
 239                 vertices[0] = video::S3DVertex(-1, -1.0, -1, 0, 1, 0, c, t, t);
 240                 vertices[1] = video::S3DVertex( 1, -1.0, -1, 0, 1, 0, c, o, t);
 241                 vertices[2] = video::S3DVertex( 1, -1.0, 1, 0, 1, 0, c, o, o);
 242                 vertices[3] = video::S3DVertex(-1, -1.0, 1, 0, 1, 0, c, t, o);
 243                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 244
 245                 driver->setMaterial(m_materials[2]);
 246
 247                 // Draw sunrise/sunset horizon glow texture (textures/base/pack/sunrisebg.png)
 248                 {
 249                         float mid1 = 0.25;
 250                         float mid = wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1);
 251                         float a_ = 1.0 - fabs(wicked_time_of_day - mid) * 35.0;
 252                         float a = easeCurve(MYMAX(0, MYMIN(1, a_)));
 253                         //std::cerr<<"a_="<<a_<<" a="<<a<<std::endl;
 254                         video::SColor c(255, 255, 255, 255);
 255                         float y = -(1.0 - a) * 0.22;
 256                         vertices[0] = video::S3DVertex(-1, -0.05 + y, -1, 0, 0, 1, c, t, t);
 257                         vertices[1] = video::S3DVertex( 1, -0.05 + y, -1, 0, 0, 1, c, o, t);
 258                         vertices[2] = video::S3DVertex( 1,   0.2 + y, -1, 0, 0, 1, c, o, o);
 259                         vertices[3] = video::S3DVertex(-1,   0.2 + y, -1, 0, 0, 1, c, t, o);
 260                         for (u32 i = 0; i < 4; i++) {
 261                                 if (wicked_time_of_day < 0.5)
 262                                         // Switch from -Z (south) to +X (east)
 263                                         vertices[i].Pos.rotateXZBy(90);
 264                                 else
 265                                         // Switch from -Z (south) to -X (west)
 266                                         vertices[i].Pos.rotateXZBy(-90);
 267                         }
 268                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 269                 }
 270
 271                 // Draw sun
 272                 if (wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85) {
 273                         if (!m_sun_texture) {
 274                                 driver->setMaterial(m_materials[1]);
 275                                 float d = sunsize * 1.7;
 276                                 video::SColor c = suncolor;
 277                                 c.setAlpha(0.05 * 255);
 278                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 279                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 280                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 281                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 282                                 for (u32 i = 0; i < 4; i++) {
 283                                         // Switch from -Z (south) to +X (east)
 284                                         vertices[i].Pos.rotateXZBy(90);
 285                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 286                                 }
 287                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 288
 289                                 d = sunsize * 1.2;
 290                                 c = suncolor;
 291                                 c.setAlpha(0.15 * 255);
 292                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 293                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 294                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 295                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 296                                 for (u32 i = 0; i < 4; i++) {
 297                                         // Switch from -Z (south) to +X (east)
 298                                         vertices[i].Pos.rotateXZBy(90);
 299                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 300                                 }
 301                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 302
 303                                 d = sunsize;
 304                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, suncolor, t, t);
 305                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, suncolor, o, t);
 306                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, suncolor, o, o);
 307                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, suncolor, t, o);
 308                                 for (u32 i = 0; i < 4; i++) {
 309                                         // Switch from -Z (south) to +X (east)
 310                                         vertices[i].Pos.rotateXZBy(90);
 311                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 312                                 }
 313                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 314
 315                                 d = sunsize * 0.7;
 316                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, suncolor2, t, t);
 317                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, suncolor2, o, t);
 318                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, suncolor2, o, o);
 319                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, suncolor2, t, o);
 320                                 for (u32 i = 0; i < 4; i++) {
 321                                         // Switch from -Z (south) to +X (east)
 322                                         vertices[i].Pos.rotateXZBy(90);
 323                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 324                                 }
 325                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 326                         } else {
 327                                 driver->setMaterial(m_materials[3]);
 328                                 float d = sunsize * 1.7;
 329                                 video::SColor c;
 330                                 if (m_sun_tonemap)
 331                                         c = video::SColor (0, 0, 0, 0);
 332                                 else
 333                                         c = video::SColor (255, 255, 255, 255);
 334                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 335                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 336                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 337                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 338                                 for(u32 i = 0; i < 4; i++) {
 339                                         // Switch from -Z (south) to +X (east)
 340                                         vertices[i].Pos.rotateXZBy(90);
 341                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 342                                 }
 343                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 344                         }
 345                 }
 346
 347                 // Draw moon
 348                 if (wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7) {
 349                         if (!m_moon_texture) {
 350                                 driver->setMaterial(m_materials[1]);
 351                                 float d = moonsize * 1.9;
 352                                 video::SColor c = mooncolor;
 353                                 c.setAlpha(0.05 * 255);
 354                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 355                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 356                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 357                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 358                                 for (u32 i = 0; i < 4; i++) {
 359                                         // Switch from -Z (south) to -X (west)
 360                                         vertices[i].Pos.rotateXZBy(-90);
 361                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 362                                 }
 363                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 364
 365                                 d = moonsize * 1.3;
 366                                 c = mooncolor;
 367                                 c.setAlpha(0.15 * 255);
 368                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 369                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 370                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 371                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 372                                 for (u32 i = 0; i < 4; i++) {
 373                                         // Switch from -Z (south) to -X (west)
 374                                         vertices[i].Pos.rotateXZBy(-90);
 375                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 376                                 }
 377                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 378
 379                                 d = moonsize;
 380                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, mooncolor, t, t);
 381                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, mooncolor, o, t);
 382                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, mooncolor, o, o);
 383                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, mooncolor, t, o);
 384                                 for (u32 i = 0; i < 4; i++) {
 385                                         // Switch from -Z (south) to -X (west)
 386                                         vertices[i].Pos.rotateXZBy(-90);
 387                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 388                                 }
 389                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 390
 391                                 float d2 = moonsize * 0.6;
 392                                 vertices[0] = video::S3DVertex(-d, -d,  -1, 0, 0, 1, mooncolor2, t, t);
 393                                 vertices[1] = video::S3DVertex( d2,-d,  -1, 0, 0, 1, mooncolor2, o, t);
 394                                 vertices[2] = video::S3DVertex( d2, d2, -1, 0, 0, 1, mooncolor2, o, o);
 395                                 vertices[3] = video::S3DVertex(-d,  d2, -1, 0, 0, 1, mooncolor2, t, o);
 396                                 for (u32 i = 0; i < 4; i++) {
 397                                         // Switch from -Z (south) to -X (west)
 398                                         vertices[i].Pos.rotateXZBy(-90);
 399                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 400                                 }
 401                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 402                         } else {
 403                                 driver->setMaterial(m_materials[4]);
 404                                 float d = moonsize * 1.9;
 405                                 video::SColor c;
 406                                 if (m_moon_tonemap)
 407                                         c = video::SColor (0, 0, 0, 0);
 408                                 else
 409                                         c = video::SColor (255, 255, 255, 255);
 410                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 411                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 412                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 413                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 414                                 for (u32 i = 0; i < 4; i++) {
 415                                         // Switch from -Z (south) to -X (west)
 416                                         vertices[i].Pos.rotateXZBy(-90);
 417                                         vertices[i].Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 418                                 }
 419                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 420                         }
 421                 }
 422
 423                 // Draw stars
 424                 driver->setMaterial(m_materials[1]);
 425                 do {
 426                         float starbrightness = MYMAX(0, MYMIN(1,
 427                                 (0.285 - fabs(wicked_time_of_day < 0.5 ?
 428                                 wicked_time_of_day : (1.0 - wicked_time_of_day))) * 10));
 429                         float f = starbrightness;
 430                         float d = 0.007;
 431                         video::SColor starcolor(255, f * 90, f * 90, f * 90);
 432                         if (starcolor.getBlue() < m_skycolor.getBlue())
 433                                 break;
 434                         u16 indices[SKY_STAR_COUNT * 4];
 435                         video::S3DVertex vertices[SKY_STAR_COUNT * 4];
 436                         for (u32 i = 0; i < SKY_STAR_COUNT; i++) {
 437                                 indices[i * 4 + 0] = i * 4 + 0;
 438                                 indices[i * 4 + 1] = i * 4 + 1;
 439                                 indices[i * 4 + 2] = i * 4 + 2;
 440                                 indices[i * 4 + 3] = i * 4 + 3;
 441                                 v3f p = m_stars[i];
 442                                 core::CMatrix4<f32> a;
 443                                 a.buildRotateFromTo(v3f(0, 1, 0), v3f(d, 1 + d / 2, 0));
 444                                 v3f p1 = p;
 445                                 a.rotateVect(p1);
 446                                 a.buildRotateFromTo(v3f(0, 1, 0), v3f(d, 1, d));
 447                                 v3f p2 = p;
 448                                 a.rotateVect(p2);
 449                                 a.buildRotateFromTo(v3f(0, 1, 0), v3f(0, 1 - d / 2, d));
 450                                 v3f p3 = p;
 451                                 a.rotateVect(p3);
 452                                 p.rotateXYBy(wicked_time_of_day * 360 - 90);
 453                                 p1.rotateXYBy(wicked_time_of_day * 360 - 90);
 454                                 p2.rotateXYBy(wicked_time_of_day * 360 - 90);
 455                                 p3.rotateXYBy(wicked_time_of_day * 360 - 90);
 456                                 vertices[i * 4 + 0].Pos = p;
 457                                 vertices[i * 4 + 0].Color = starcolor;
 458                                 vertices[i * 4 + 1].Pos = p1;
 459                                 vertices[i * 4 + 1].Color = starcolor;
 460                                 vertices[i * 4 + 2].Pos = p2;
 461                                 vertices[i * 4 + 2].Color = starcolor;
 462                                 vertices[i * 4 + 3].Pos = p3;
 463                                 vertices[i * 4 + 3].Color = starcolor;
 464                         }
 465                         driver->drawVertexPrimitiveList(vertices, SKY_STAR_COUNT * 4,
 466                                 indices, SKY_STAR_COUNT, video::EVT_STANDARD,
 467                                 scene::EPT_QUADS, video::EIT_16BIT);
 468                 } while(0);
 469
 470                 // Draw far cloudy fog thing below east and west horizons
 471                 for (u32 j = 0; j < 2; j++) {
 472                         video::SColor c = cloudyfogcolor;
 473                         vertices[0] = video::S3DVertex(-1, -1.0,  -1, 0, 0, 1, c, t, t);
 474                         vertices[1] = video::S3DVertex( 1, -1.0,  -1, 0, 0, 1, c, o, t);
 475                         vertices[2] = video::S3DVertex( 1, -0.02, -1, 0, 0, 1, c, o, o);
 476                         vertices[3] = video::S3DVertex(-1, -0.02, -1, 0, 0, 1, c, t, o);
 477                         for (u32 i = 0; i < 4; i++) {
 478                                 //if (wicked_time_of_day < 0.5)
 479                                 if (j == 0)
 480                                         // Switch from -Z (south) to +X (east)
 481                                         vertices[i].Pos.rotateXZBy(90);
 482                                 else
 483                                         // Switch from -Z (south) to -X (west)
 484                                         vertices[i].Pos.rotateXZBy(-90);
 485                         }
 486                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 487                 }
 488         }
 489 }
 490
 491
 492 void Sky::update(float time_of_day, float time_brightness,
 493                 float direct_brightness, bool sunlight_seen,
 494                 CameraMode cam_mode, float yaw, float pitch)
 495 {
 496         // Stabilize initial brightness and color values by flooding updates
 497         if (m_first_update) {
 498                 /*dstream<<"First update with time_of_day="<<time_of_day
 499                                 <<" time_brightness="<<time_brightness
 500                                 <<" direct_brightness="<<direct_brightness
 501                                 <<" sunlight_seen="<<sunlight_seen<<std::endl;*/
 502                 m_first_update = false;
 503                 for (u32 i = 0; i < 100; i++) {
 504                         update(time_of_day, time_brightness, direct_brightness,
 505                                 sunlight_seen, cam_mode, yaw, pitch);
 506                 }
 507                 return;
 508         }
 509
 510         m_time_of_day = time_of_day;
 511         m_time_brightness = time_brightness;
 512         m_sunlight_seen = sunlight_seen;
 513
 514         bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
 515
 516         /*
 517         Development colours
 518
 519         video::SColorf bgcolor_bright_normal_f(170. / 255, 200. / 255, 230. / 255, 1.0);
 520         video::SColorf bgcolor_bright_dawn_f(0.666, 200. / 255 * 0.7, 230. / 255 * 0.5, 1.0);
 521         video::SColorf bgcolor_bright_dawn_f(0.666, 0.549, 0.220, 1.0);
 522         video::SColorf bgcolor_bright_dawn_f(0.666 * 1.2, 0.549 * 1.0, 0.220 * 1.0, 1.0);
 523         video::SColorf bgcolor_bright_dawn_f(0.666 * 1.2, 0.549 * 1.0, 0.220 * 1.2, 1.0);
 524
 525         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.591, 0.4);
 526         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
 527         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
 528         */
 529
 530         video::SColorf bgcolor_bright_normal_f = video::SColor(255, 155, 193, 240);
 531         video::SColorf bgcolor_bright_indoor_f = video::SColor(255, 100, 100, 100);
 532         video::SColorf bgcolor_bright_dawn_f = video::SColor(255, 186, 193, 240);
 533         video::SColorf bgcolor_bright_night_f = video::SColor(255, 64, 144, 255);
 534
 535         video::SColorf skycolor_bright_normal_f = video::SColor(255, 140, 186, 250);
 536         video::SColorf skycolor_bright_dawn_f = video::SColor(255, 180, 186, 250);
 537         video::SColorf skycolor_bright_night_f = video::SColor(255, 0, 107, 255);
 538
 539         // pure white: becomes "diffuse light component" for clouds
 540         video::SColorf cloudcolor_bright_normal_f = video::SColor(255, 255, 255, 255);
 541         // dawn-factoring version of pure white (note: R is above 1.0)
 542         video::SColorf cloudcolor_bright_dawn_f(255.0f/240.0f, 223.0f/240.0f, 191.0f/255.0f);
 543
 544         float cloud_color_change_fraction = 0.95;
 545         if (sunlight_seen) {
 546                 if (fabs(time_brightness - m_brightness) < 0.2) {
 547                         m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
 548                 } else {
 549                         m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
 550                         cloud_color_change_fraction = 0.0;
 551                 }
 552         } else {
 553                 if (direct_brightness < m_brightness)
 554                         m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
 555                 else
 556                         m_brightness = m_brightness * 0.98 + direct_brightness * 0.02;
 557         }
 558
 559         m_clouds_visible = true;
 560         float color_change_fraction = 0.98;
 561         if (sunlight_seen) {
 562                 if (is_dawn) {  // Dawn
 563                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 564                                 bgcolor_bright_dawn_f, color_change_fraction);
 565                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 566                                 skycolor_bright_dawn_f, color_change_fraction);
 567                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 568                                 cloudcolor_bright_dawn_f, color_change_fraction);
 569                 } else {
 570                         if (time_brightness < 0.07) {  // Night
 571                                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 572                                         bgcolor_bright_night_f, color_change_fraction);
 573                                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 574                                         skycolor_bright_night_f, color_change_fraction);
 575                         } else {  // Day
 576                                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 577                                         bgcolor_bright_normal_f, color_change_fraction);
 578                                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 579                                         skycolor_bright_normal_f, color_change_fraction);
 580                         }
 581
 582                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 583                                 cloudcolor_bright_normal_f, color_change_fraction);
 584                 }
 585         } else {
 586                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 587                         bgcolor_bright_indoor_f, color_change_fraction);
 588                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 589                         bgcolor_bright_indoor_f, color_change_fraction);
 590                 m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 591                         cloudcolor_bright_normal_f, color_change_fraction);
 592                 m_clouds_visible = false;
 593         }
 594
 595         video::SColor bgcolor_bright = m_bgcolor_bright_f.toSColor();
 596         m_bgcolor = video::SColor(
 597                 255,
 598                 bgcolor_bright.getRed() * m_brightness,
 599                 bgcolor_bright.getGreen() * m_brightness,
 600                 bgcolor_bright.getBlue() * m_brightness
 601         );
 602
 603         video::SColor skycolor_bright = m_skycolor_bright_f.toSColor();
 604         m_skycolor = video::SColor(
 605                 255,
 606                 skycolor_bright.getRed() * m_brightness,
 607                 skycolor_bright.getGreen() * m_brightness,
 608                 skycolor_bright.getBlue() * m_brightness
 609         );
 610
 611         // Horizon coloring based on sun and moon direction during sunset and sunrise
 612         video::SColor pointcolor = video::SColor(m_bgcolor.getAlpha(), 255, 255, 255);
 613         if (m_directional_colored_fog) {
 614                 if (m_horizon_blend() != 0) {
 615                         // Calculate hemisphere value from yaw, (inverted in third person front view)
 616                         s8 dir_factor = 1;
 617                         if (cam_mode > CAMERA_MODE_THIRD)
 618                                 dir_factor = -1;
 619                         f32 pointcolor_blend = wrapDegrees_0_360(yaw * dir_factor + 90);
 620                         if (pointcolor_blend > 180)
 621                                 pointcolor_blend = 360 - pointcolor_blend;
 622                         pointcolor_blend /= 180;
 623                         // Bound view angle to determine where transition starts and ends
 624                         pointcolor_blend = rangelim(1 - pointcolor_blend * 1.375, 0, 1 / 1.375) *
 625                                 1.375;
 626                         // Combine the colors when looking up or down, otherwise turning looks weird
 627                         pointcolor_blend += (0.5 - pointcolor_blend) *
 628                                 (1 - MYMIN((90 - std::fabs(pitch)) / 90 * 1.5, 1));
 629                         // Invert direction to match where the sun and moon are rising
 630                         if (m_time_of_day > 0.5)
 631                                 pointcolor_blend = 1 - pointcolor_blend;
 632                         // Horizon colors of sun and moon
 633                         f32 pointcolor_light = rangelim(m_time_brightness * 3, 0.2, 1);
 634
 635                         video::SColorf pointcolor_sun_f(1, 1, 1, 1);
 636                         if (m_sun_tonemap) {
 637                                 pointcolor_sun_f.r = pointcolor_light *
 638                                         (float)m_materials[3].EmissiveColor.getRed() / 255;
 639                                 pointcolor_sun_f.b = pointcolor_light *
 640                                         (float)m_materials[3].EmissiveColor.getBlue() / 255;
 641                                 pointcolor_sun_f.g = pointcolor_light *
 642                                         (float)m_materials[3].EmissiveColor.getGreen() / 255;
 643                         } else {
 644                                 pointcolor_sun_f.r = pointcolor_light * 1;
 645                                 pointcolor_sun_f.b = pointcolor_light *
 646                                         (0.25 + (rangelim(m_time_brightness, 0.25, 0.75) - 0.25) * 2 * 0.75);
 647                                 pointcolor_sun_f.g = pointcolor_light * (pointcolor_sun_f.b * 0.375 +
 648                                         (rangelim(m_time_brightness, 0.05, 0.15) - 0.05) * 10 * 0.625);
 649                         }
 650
 651                         video::SColorf pointcolor_moon_f(0.5 * pointcolor_light,
 652                                 0.6 * pointcolor_light, 0.8 * pointcolor_light, 1);
 653                         if (m_moon_tonemap) {
 654                                 pointcolor_moon_f.r = pointcolor_light *
 655                                         (float)m_materials[4].EmissiveColor.getRed() / 255;
 656                                 pointcolor_moon_f.b = pointcolor_light *
 657                                         (float)m_materials[4].EmissiveColor.getBlue() / 255;
 658                                 pointcolor_moon_f.g = pointcolor_light *
 659                                         (float)m_materials[4].EmissiveColor.getGreen() / 255;
 660                         }
 661
 662                         video::SColor pointcolor_sun = pointcolor_sun_f.toSColor();
 663                         video::SColor pointcolor_moon = pointcolor_moon_f.toSColor();
 664                         // Calculate the blend color
 665                         pointcolor = m_mix_scolor(pointcolor_moon, pointcolor_sun, pointcolor_blend);
 666                 }
 667                 m_bgcolor = m_mix_scolor(m_bgcolor, pointcolor, m_horizon_blend() * 0.5);
 668                 m_skycolor = m_mix_scolor(m_skycolor, pointcolor, m_horizon_blend() * 0.25);
 669         }
 670
 671         float cloud_direct_brightness = 0;
 672         if (sunlight_seen) {
 673                 if (!m_directional_colored_fog) {
 674                         cloud_direct_brightness = time_brightness;
 675                         if (time_brightness >= 0.2 && time_brightness < 0.7)
 676                                 cloud_direct_brightness *= 1.3;
 677                 } else {
 678                         cloud_direct_brightness = MYMIN(m_horizon_blend() * 0.15 +
 679                                 m_time_brightness, 1);
 680                 }
 681         } else {
 682                 cloud_direct_brightness = direct_brightness;
 683         }
 684
 685         m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
 686                 cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
 687         m_cloudcolor_f = video::SColorf(
 688                 m_cloudcolor_bright_f.r * m_cloud_brightness,
 689                 m_cloudcolor_bright_f.g * m_cloud_brightness,
 690                 m_cloudcolor_bright_f.b * m_cloud_brightness,
 691                 1.0
 692         );
 693         if (m_directional_colored_fog) {
 694                 m_cloudcolor_f = m_mix_scolorf(m_cloudcolor_f,
 695                         video::SColorf(pointcolor), m_horizon_blend() * 0.25);
 696         }
 697 }