src/client/sky.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "sky.h"
  21 #include "IVideoDriver.h"
  22 #include "ISceneManager.h"
  23 #include "ICameraSceneNode.h"
  24 #include "S3DVertex.h"
  25 #include "client/tile.h"
  26 #include "noise.h"  // easeCurve
  27 #include "profiler.h"
  28 #include "util/numeric.h"
  29 #include <cmath>
  30 #include "client/renderingengine.h"
  31 #include "settings.h"
  32 #include "camera.h"  // CameraModes
  33
  34
  35 Sky::Sky(s32 id, ITextureSource *tsrc):
  36                 scene::ISceneNode(RenderingEngine::get_scene_manager()->getRootSceneNode(),
  37                         RenderingEngine::get_scene_manager(), id)
  38 {
  39         setAutomaticCulling(scene::EAC_OFF);
  40         m_box.MaxEdge.set(0, 0, 0);
  41         m_box.MinEdge.set(0, 0, 0);
  42
  43         // Create material
  44
  45         video::SMaterial mat;
  46         mat.Lighting = false;
  47 #ifdef __ANDROID__
  48         mat.ZBuffer = video::ECFN_DISABLED;
  49 #else
  50         mat.ZBuffer = video::ECFN_NEVER;
  51 #endif
  52         mat.ZWriteEnable = false;
  53         mat.AntiAliasing = 0;
  54         mat.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
  55         mat.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
  56         mat.BackfaceCulling = false;
  57
  58         m_materials[0] = mat;
  59
  60         m_materials[1] = mat;
  61         //m_materials[1].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
  62         m_materials[1].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  63
  64         m_materials[2] = mat;
  65         m_materials[2].setTexture(0, tsrc->getTextureForMesh("sunrisebg.png"));
  66         m_materials[2].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  67         //m_materials[2].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
  68
  69         m_sun_texture = tsrc->isKnownSourceImage("sun.png") ?
  70                 tsrc->getTextureForMesh("sun.png") : NULL;
  71         m_moon_texture = tsrc->isKnownSourceImage("moon.png") ?
  72                 tsrc->getTextureForMesh("moon.png") : NULL;
  73         m_sun_tonemap = tsrc->isKnownSourceImage("sun_tonemap.png") ?
  74                 tsrc->getTexture("sun_tonemap.png") : NULL;
  75         m_moon_tonemap = tsrc->isKnownSourceImage("moon_tonemap.png") ?
  76                 tsrc->getTexture("moon_tonemap.png") : NULL;
  77
  78         if (m_sun_texture) {
  79                 m_materials[3] = mat;
  80                 m_materials[3].setTexture(0, m_sun_texture);
  81                 m_materials[3].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  82                 if (m_sun_tonemap)
  83                         m_materials[3].Lighting = true;
  84         }
  85
  86         if (m_moon_texture) {
  87                 m_materials[4] = mat;
  88                 m_materials[4].setTexture(0, m_moon_texture);
  89                 m_materials[4].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
  90                 if (m_moon_tonemap)
  91                         m_materials[4].Lighting = true;
  92         }
  93
  94         for (v3f &star : m_stars) {
  95                 star = v3f(
  96                         myrand_range(-10000, 10000),
  97                         myrand_range(-10000, 10000),
  98                         myrand_range(-10000, 10000)
  99                 );
 100                 star.normalize();
 101         }
 102
 103         m_directional_colored_fog = g_settings->getBool("directional_colored_fog");
 104 }
 105
 106
 107 void Sky::OnRegisterSceneNode()
 108 {
 109         if (IsVisible)
 110                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
 111
 112         scene::ISceneNode::OnRegisterSceneNode();
 113 }
 114
 115
 116 void Sky::render()
 117 {
 118         if (!m_visible)
 119                 return;
 120
 121         video::IVideoDriver* driver = SceneManager->getVideoDriver();
 122         scene::ICameraSceneNode* camera = SceneManager->getActiveCamera();
 123
 124         if (!camera || !driver)
 125                 return;
 126
 127         ScopeProfiler sp(g_profiler, "Sky::render()", SPT_AVG);
 128
 129         // Draw perspective skybox
 130
 131         core::matrix4 translate(AbsoluteTransformation);
 132         translate.setTranslation(camera->getAbsolutePosition());
 133
 134         // Draw the sky box between the near and far clip plane
 135         const f32 viewDistance = (camera->getNearValue() + camera->getFarValue()) * 0.5f;
 136         core::matrix4 scale;
 137         scale.setScale(core::vector3df(viewDistance, viewDistance, viewDistance));
 138
 139         driver->setTransform(video::ETS_WORLD, translate * scale);
 140
 141         if (m_sunlight_seen) {
 142                 float sunsize = 0.07;
 143                 video::SColorf suncolor_f(1, 1, 0, 1);
 144                 //suncolor_f.r = 1;
 145                 //suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.7 + m_time_brightness * 0.5));
 146                 //suncolor_f.b = MYMAX(0.0, m_brightness * 0.95);
 147                 video::SColorf suncolor2_f(1, 1, 1, 1);
 148                 // The values below were probably meant to be suncolor2_f instead of a
 149                 // reassignment of suncolor_f. However, the resulting colour was chosen
 150                 // and is our long-running classic colour. So preserve, but comment-out
 151                 // the unnecessary first assignments above.
 152                 suncolor_f.r = 1;
 153                 suncolor_f.g = MYMAX(0.3, MYMIN(1.0, 0.85 + m_time_brightness * 0.5));
 154                 suncolor_f.b = MYMAX(0.0, m_brightness);
 155
 156                 float moonsize = 0.04;
 157                 video::SColorf mooncolor_f(0.50, 0.57, 0.65, 1);
 158                 video::SColorf mooncolor2_f(0.85, 0.875, 0.9, 1);
 159
 160                 float nightlength = 0.415;
 161                 float wn = nightlength / 2;
 162                 float wicked_time_of_day = 0;
 163                 if (m_time_of_day > wn && m_time_of_day < 1.0 - wn)
 164                         wicked_time_of_day = (m_time_of_day - wn) / (1.0 - wn * 2) * 0.5 + 0.25;
 165                 else if (m_time_of_day < 0.5)
 166                         wicked_time_of_day = m_time_of_day / wn * 0.25;
 167                 else
 168                         wicked_time_of_day = 1.0 - ((1.0 - m_time_of_day) / wn * 0.25);
 169                 /*std::cerr<<"time_of_day="<<m_time_of_day<<" -> "
 170                                 <<"wicked_time_of_day="<<wicked_time_of_day<<std::endl;*/
 171
 172                 video::SColor suncolor = suncolor_f.toSColor();
 173                 video::SColor suncolor2 = suncolor2_f.toSColor();
 174                 video::SColor mooncolor = mooncolor_f.toSColor();
 175                 video::SColor mooncolor2 = mooncolor2_f.toSColor();
 176
 177                 // Calculate offset normalized to the X dimension of a 512x1 px tonemap
 178                 float offset = (1.0 - fabs(sin((m_time_of_day - 0.5) * irr::core::PI))) * 511;
 179
 180                 if (m_sun_tonemap) {
 181                         u8 * texels = (u8 *)m_sun_tonemap->lock();
 182                         video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
 183                         video::SColor texel_color (255, texel->getRed(),
 184                                 texel->getGreen(), texel->getBlue());
 185                         m_sun_tonemap->unlock();
 186                         m_materials[3].EmissiveColor = texel_color;
 187                 }
 188
 189                 if (m_moon_tonemap) {
 190                         u8 * texels = (u8 *)m_moon_tonemap->lock();
 191                         video::SColor* texel = (video::SColor *)(texels + (u32)offset * 4);
 192                         video::SColor texel_color (255, texel->getRed(),
 193                                 texel->getGreen(), texel->getBlue());
 194                         m_moon_tonemap->unlock();
 195                         m_materials[4].EmissiveColor = texel_color;
 196                 }
 197
 198                 const f32 t = 1.0f;
 199                 const f32 o = 0.0f;
 200                 static const u16 indices[4] = {0, 1, 2, 3};
 201                 video::S3DVertex vertices[4];
 202
 203                 driver->setMaterial(m_materials[1]);
 204
 205                 video::SColor cloudyfogcolor = m_bgcolor;
 206
 207                 // Draw far cloudy fog thing blended with skycolor
 208                 for (u32 j = 0; j < 4; j++) {
 209                         video::SColor c = cloudyfogcolor.getInterpolated(m_skycolor, 0.45);
 210                         vertices[0] = video::S3DVertex(-1, 0.08, -1, 0, 0, 1, c, t, t);
 211                         vertices[1] = video::S3DVertex( 1, 0.08, -1, 0, 0, 1, c, o, t);
 212                         vertices[2] = video::S3DVertex( 1, 0.12, -1, 0, 0, 1, c, o, o);
 213                         vertices[3] = video::S3DVertex(-1, 0.12, -1, 0, 0, 1, c, t, o);
 214                         for (video::S3DVertex &vertex : vertices) {
 215                                 if (j == 0)
 216                                         // Don't switch
 217                                         {}
 218                                 else if (j == 1)
 219                                         // Switch from -Z (south) to +X (east)
 220                                         vertex.Pos.rotateXZBy(90);
 221                                 else if (j == 2)
 222                                         // Switch from -Z (south) to -X (west)
 223                                         vertex.Pos.rotateXZBy(-90);
 224                                 else
 225                                         // Switch from -Z (south) to +Z (north)
 226                                         vertex.Pos.rotateXZBy(-180);
 227                         }
 228                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 229                 }
 230
 231                 // Draw far cloudy fog thing at and below all horizons
 232                 for (u32 j = 0; j < 4; j++) {
 233                         video::SColor c = cloudyfogcolor;
 234                         vertices[0] = video::S3DVertex(-1, -1.0, -1, 0, 0, 1, c, t, t);
 235                         vertices[1] = video::S3DVertex( 1, -1.0, -1, 0, 0, 1, c, o, t);
 236                         vertices[2] = video::S3DVertex( 1, 0.08, -1, 0, 0, 1, c, o, o);
 237                         vertices[3] = video::S3DVertex(-1, 0.08, -1, 0, 0, 1, c, t, o);
 238                         for (video::S3DVertex &vertex : vertices) {
 239                                 if (j == 0)
 240                                         // Don't switch
 241                                         {}
 242                                 else if (j == 1)
 243                                         // Switch from -Z (south) to +X (east)
 244                                         vertex.Pos.rotateXZBy(90);
 245                                 else if (j == 2)
 246                                         // Switch from -Z (south) to -X (west)
 247                                         vertex.Pos.rotateXZBy(-90);
 248                                 else
 249                                         // Switch from -Z (south) to +Z (north)
 250                                         vertex.Pos.rotateXZBy(-180);
 251                         }
 252                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 253                 }
 254
 255                 // If sun, moon and stars are (temporarily) disabled, abort here
 256                 if (!m_bodies_visible)
 257                         return;
 258
 259                 // Draw stars before sun and moon to be behind them
 260                 do {
 261                         driver->setMaterial(m_materials[1]);
 262                         // Tune values so that stars first appear just after the sun
 263                         // disappears over the horizon, and disappear just before the sun
 264                         // appears over the horizon.
 265                         // Also tune so that stars are at full brightness from time 20000 to
 266                         // time 4000.
 267                         float starbrightness = MYMAX(0, MYMIN(1,
 268                                 (0.25 - fabs(wicked_time_of_day < 0.5 ?
 269                                 wicked_time_of_day : (1.0 - wicked_time_of_day))) * 20));
 270                         float f = starbrightness;
 271                         float d = 0.007 / 2;
 272                         video::SColor starcolor(255, f * 90, f * 90, f * 90);
 273                         // Stars are only drawn when brighter than skycolor
 274                         if (starcolor.getBlue() < m_skycolor.getBlue())
 275                                 break;
 276 #ifdef __ANDROID__
 277                         u16 indices[SKY_STAR_COUNT * 3];
 278                         video::S3DVertex vertices[SKY_STAR_COUNT * 3];
 279                         for (u32 i = 0; i < SKY_STAR_COUNT; i++) {
 280                                 indices[i * 3 + 0] = i * 3 + 0;
 281                                 indices[i * 3 + 1] = i * 3 + 1;
 282                                 indices[i * 3 + 2] = i * 3 + 2;
 283                                 v3f r = m_stars[i];
 284                                 core::CMatrix4<f32> a;
 285                                 a.buildRotateFromTo(v3f(0, 1, 0), r);
 286                                 v3f p = v3f(-d, 1, -d);
 287                                 v3f p1 = v3f(d, 1, 0);
 288                                 v3f p2 = v3f(-d, 1, d);
 289                                 a.rotateVect(p);
 290                                 a.rotateVect(p1);
 291                                 a.rotateVect(p2);
 292                                 p.rotateXYBy(wicked_time_of_day * 360 - 90);
 293                                 p1.rotateXYBy(wicked_time_of_day * 360 - 90);
 294                                 p2.rotateXYBy(wicked_time_of_day * 360 - 90);
 295                                 vertices[i * 3 + 0].Pos = p;
 296                                 vertices[i * 3 + 0].Color = starcolor;
 297                                 vertices[i * 3 + 1].Pos = p1;
 298                                 vertices[i * 3 + 1].Color = starcolor;
 299                                 vertices[i * 3 + 2].Pos = p2;
 300                                 vertices[i * 3 + 2].Color = starcolor;
 301                         }
 302                         driver->drawIndexedTriangleList(vertices, SKY_STAR_COUNT * 3,
 303                                         indices, SKY_STAR_COUNT);
 304 #else
 305                         u16 indices[SKY_STAR_COUNT * 4];
 306                         video::S3DVertex vertices[SKY_STAR_COUNT * 4];
 307                         for (u32 i = 0; i < SKY_STAR_COUNT; i++) {
 308                                 indices[i * 4 + 0] = i * 4 + 0;
 309                                 indices[i * 4 + 1] = i * 4 + 1;
 310                                 indices[i * 4 + 2] = i * 4 + 2;
 311                                 indices[i * 4 + 3] = i * 4 + 3;
 312                                 v3f r = m_stars[i];
 313                                 core::CMatrix4<f32> a;
 314                                 a.buildRotateFromTo(v3f(0, 1, 0), r);
 315                                 v3f p = v3f(-d, 1, -d);
 316                                 v3f p1 = v3f( d, 1, -d);
 317                                 v3f p2 = v3f( d, 1, d);
 318                                 v3f p3 = v3f(-d, 1, d);
 319                                 a.rotateVect(p);
 320                                 a.rotateVect(p1);
 321                                 a.rotateVect(p2);
 322                                 a.rotateVect(p3);
 323                                 p.rotateXYBy(wicked_time_of_day * 360 - 90);
 324                                 p1.rotateXYBy(wicked_time_of_day * 360 - 90);
 325                                 p2.rotateXYBy(wicked_time_of_day * 360 - 90);
 326                                 p3.rotateXYBy(wicked_time_of_day * 360 - 90);
 327                                 vertices[i * 4 + 0].Pos = p;
 328                                 vertices[i * 4 + 0].Color = starcolor;
 329                                 vertices[i * 4 + 1].Pos = p1;
 330                                 vertices[i * 4 + 1].Color = starcolor;
 331                                 vertices[i * 4 + 2].Pos = p2;
 332                                 vertices[i * 4 + 2].Color = starcolor;
 333                                 vertices[i * 4 + 3].Pos = p3;
 334                                 vertices[i * 4 + 3].Color = starcolor;
 335                         }
 336                         driver->drawVertexPrimitiveList(vertices, SKY_STAR_COUNT * 4,
 337                                 indices, SKY_STAR_COUNT, video::EVT_STANDARD,
 338                                 scene::EPT_QUADS, video::EIT_16BIT);
 339 #endif
 340                 } while(false);
 341
 342                 // Draw sunrise/sunset horizon glow texture (textures/base/pack/sunrisebg.png)
 343                 {
 344                         driver->setMaterial(m_materials[2]);
 345                         float mid1 = 0.25;
 346                         float mid = wicked_time_of_day < 0.5 ? mid1 : (1.0 - mid1);
 347                         float a_ = 1.0f - std::fabs(wicked_time_of_day - mid) * 35.0f;
 348                         float a = easeCurve(MYMAX(0, MYMIN(1, a_)));
 349                         //std::cerr<<"a_="<<a_<<" a="<<a<<std::endl;
 350                         video::SColor c(255, 255, 255, 255);
 351                         float y = -(1.0 - a) * 0.22;
 352                         vertices[0] = video::S3DVertex(-1, -0.05 + y, -1, 0, 0, 1, c, t, t);
 353                         vertices[1] = video::S3DVertex( 1, -0.05 + y, -1, 0, 0, 1, c, o, t);
 354                         vertices[2] = video::S3DVertex( 1,   0.2 + y, -1, 0, 0, 1, c, o, o);
 355                         vertices[3] = video::S3DVertex(-1,   0.2 + y, -1, 0, 0, 1, c, t, o);
 356                         for (video::S3DVertex &vertex : vertices) {
 357                                 if (wicked_time_of_day < 0.5)
 358                                         // Switch from -Z (south) to +X (east)
 359                                         vertex.Pos.rotateXZBy(90);
 360                                 else
 361                                         // Switch from -Z (south) to -X (west)
 362                                         vertex.Pos.rotateXZBy(-90);
 363                         }
 364                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 365                 }
 366
 367                 // Draw sun
 368                 if (wicked_time_of_day > 0.15 && wicked_time_of_day < 0.85) {
 369                         if (!m_sun_texture) {
 370                                 driver->setMaterial(m_materials[1]);
 371                                 float d = sunsize * 1.7;
 372                                 video::SColor c = suncolor;
 373                                 c.setAlpha(0.05 * 255);
 374                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 375                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 376                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 377                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 378                                 for (video::S3DVertex &vertex : vertices) {
 379                                         // Switch from -Z (south) to +X (east)
 380                                         vertex.Pos.rotateXZBy(90);
 381                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 382                                 }
 383                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 384
 385                                 d = sunsize * 1.2;
 386                                 c = suncolor;
 387                                 c.setAlpha(0.15 * 255);
 388                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 389                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 390                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 391                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 392                                 for (video::S3DVertex &vertex : vertices) {
 393                                         // Switch from -Z (south) to +X (east)
 394                                         vertex.Pos.rotateXZBy(90);
 395                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 396                                 }
 397                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 398
 399                                 d = sunsize;
 400                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, suncolor, t, t);
 401                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, suncolor, o, t);
 402                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, suncolor, o, o);
 403                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, suncolor, t, o);
 404                                 for (video::S3DVertex &vertex : vertices) {
 405                                         // Switch from -Z (south) to +X (east)
 406                                         vertex.Pos.rotateXZBy(90);
 407                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 408                                 }
 409                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 410
 411                                 d = sunsize * 0.7;
 412                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, suncolor2, t, t);
 413                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, suncolor2, o, t);
 414                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, suncolor2, o, o);
 415                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, suncolor2, t, o);
 416                                 for (video::S3DVertex &vertex : vertices) {
 417                                         // Switch from -Z (south) to +X (east)
 418                                         vertex.Pos.rotateXZBy(90);
 419                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 420                                 }
 421                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 422                         } else {
 423                                 driver->setMaterial(m_materials[3]);
 424                                 float d = sunsize * 1.7;
 425                                 video::SColor c;
 426                                 if (m_sun_tonemap)
 427                                         c = video::SColor (0, 0, 0, 0);
 428                                 else
 429                                         c = video::SColor (255, 255, 255, 255);
 430                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 431                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 432                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 433                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 434                                 for (video::S3DVertex &vertex : vertices) {
 435                                         // Switch from -Z (south) to +X (east)
 436                                         vertex.Pos.rotateXZBy(90);
 437                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 438                                 }
 439                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 440                         }
 441                 }
 442
 443                 // Draw moon
 444                 if (wicked_time_of_day < 0.3 || wicked_time_of_day > 0.7) {
 445                         if (!m_moon_texture) {
 446                                 driver->setMaterial(m_materials[1]);
 447                                 float d = moonsize * 1.9;
 448                                 video::SColor c = mooncolor;
 449                                 c.setAlpha(0.05 * 255);
 450                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 451                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 452                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 453                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 454                                 for (video::S3DVertex &vertex : vertices) {
 455                                         // Switch from -Z (south) to -X (west)
 456                                         vertex.Pos.rotateXZBy(-90);
 457                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 458                                 }
 459                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 460
 461                                 d = moonsize * 1.3;
 462                                 c = mooncolor;
 463                                 c.setAlpha(0.15 * 255);
 464                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 465                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 466                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 467                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 468                                 for (video::S3DVertex &vertex : vertices) {
 469                                         // Switch from -Z (south) to -X (west)
 470                                         vertex.Pos.rotateXZBy(-90);
 471                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 472                                 }
 473                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 474
 475                                 d = moonsize;
 476                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, mooncolor, t, t);
 477                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, mooncolor, o, t);
 478                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, mooncolor, o, o);
 479                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, mooncolor, t, o);
 480                                 for (video::S3DVertex &vertex : vertices) {
 481                                         // Switch from -Z (south) to -X (west)
 482                                         vertex.Pos.rotateXZBy(-90);
 483                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 484                                 }
 485                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 486
 487                                 float d2 = moonsize * 0.6;
 488                                 vertices[0] = video::S3DVertex(-d, -d,  -1, 0, 0, 1, mooncolor2, t, t);
 489                                 vertices[1] = video::S3DVertex( d2,-d,  -1, 0, 0, 1, mooncolor2, o, t);
 490                                 vertices[2] = video::S3DVertex( d2, d2, -1, 0, 0, 1, mooncolor2, o, o);
 491                                 vertices[3] = video::S3DVertex(-d,  d2, -1, 0, 0, 1, mooncolor2, t, o);
 492                                 for (video::S3DVertex &vertex : vertices) {
 493                                         // Switch from -Z (south) to -X (west)
 494                                         vertex.Pos.rotateXZBy(-90);
 495                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 496                                 }
 497                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 498                         } else {
 499                                 driver->setMaterial(m_materials[4]);
 500                                 float d = moonsize * 1.9;
 501                                 video::SColor c;
 502                                 if (m_moon_tonemap)
 503                                         c = video::SColor (0, 0, 0, 0);
 504                                 else
 505                                         c = video::SColor (255, 255, 255, 255);
 506                                 vertices[0] = video::S3DVertex(-d, -d, -1, 0, 0, 1, c, t, t);
 507                                 vertices[1] = video::S3DVertex( d, -d, -1, 0, 0, 1, c, o, t);
 508                                 vertices[2] = video::S3DVertex( d,  d, -1, 0, 0, 1, c, o, o);
 509                                 vertices[3] = video::S3DVertex(-d,  d, -1, 0, 0, 1, c, t, o);
 510                                 for (video::S3DVertex &vertex : vertices) {
 511                                         // Switch from -Z (south) to -X (west)
 512                                         vertex.Pos.rotateXZBy(-90);
 513                                         vertex.Pos.rotateXYBy(wicked_time_of_day * 360 - 90);
 514                                 }
 515                                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 516                         }
 517                 }
 518
 519                 // Draw far cloudy fog thing below all horizons in front of sun, moon
 520                 // and stars.
 521                 driver->setMaterial(m_materials[1]);
 522
 523                 for (u32 j = 0; j < 4; j++) {
 524                         video::SColor c = cloudyfogcolor;
 525                         vertices[0] = video::S3DVertex(-1, -1.0,  -1, 0, 0, 1, c, t, t);
 526                         vertices[1] = video::S3DVertex( 1, -1.0,  -1, 0, 0, 1, c, o, t);
 527                         vertices[2] = video::S3DVertex( 1, -0.02, -1, 0, 0, 1, c, o, o);
 528                         vertices[3] = video::S3DVertex(-1, -0.02, -1, 0, 0, 1, c, t, o);
 529                         for (video::S3DVertex &vertex : vertices) {
 530                                 if (j == 0)
 531                                         // Don't switch
 532                                         {}
 533                                 else if (j == 1)
 534                                         // Switch from -Z (south) to +X (east)
 535                                         vertex.Pos.rotateXZBy(90);
 536                                 else if (j == 2)
 537                                         // Switch from -Z (south) to -X (west)
 538                                         vertex.Pos.rotateXZBy(-90);
 539                                 else
 540                                         // Switch from -Z (south) to +Z (north)
 541                                         vertex.Pos.rotateXZBy(-180);
 542                         }
 543                         driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 544                 }
 545
 546                 // Draw bottom far cloudy fog thing in front of sun, moon and stars
 547                 video::SColor c = cloudyfogcolor;
 548                 vertices[0] = video::S3DVertex(-1, -1.0, -1, 0, 1, 0, c, t, t);
 549                 vertices[1] = video::S3DVertex( 1, -1.0, -1, 0, 1, 0, c, o, t);
 550                 vertices[2] = video::S3DVertex( 1, -1.0, 1, 0, 1, 0, c, o, o);
 551                 vertices[3] = video::S3DVertex(-1, -1.0, 1, 0, 1, 0, c, t, o);
 552                 driver->drawIndexedTriangleFan(&vertices[0], 4, indices, 2);
 553         }
 554 }
 555
 556
 557 void Sky::update(float time_of_day, float time_brightness,
 558                 float direct_brightness, bool sunlight_seen,
 559                 CameraMode cam_mode, float yaw, float pitch)
 560 {
 561         // Stabilize initial brightness and color values by flooding updates
 562         if (m_first_update) {
 563                 /*dstream<<"First update with time_of_day="<<time_of_day
 564                                 <<" time_brightness="<<time_brightness
 565                                 <<" direct_brightness="<<direct_brightness
 566                                 <<" sunlight_seen="<<sunlight_seen<<std::endl;*/
 567                 m_first_update = false;
 568                 for (u32 i = 0; i < 100; i++) {
 569                         update(time_of_day, time_brightness, direct_brightness,
 570                                 sunlight_seen, cam_mode, yaw, pitch);
 571                 }
 572                 return;
 573         }
 574
 575         m_time_of_day = time_of_day;
 576         m_time_brightness = time_brightness;
 577         m_sunlight_seen = sunlight_seen;
 578         m_bodies_visible = true;
 579
 580         bool is_dawn = (time_brightness >= 0.20 && time_brightness < 0.35);
 581
 582         /*
 583         Development colours
 584
 585         video::SColorf bgcolor_bright_normal_f(170. / 255, 200. / 255, 230. / 255, 1.0);
 586         video::SColorf bgcolor_bright_dawn_f(0.666, 200. / 255 * 0.7, 230. / 255 * 0.5, 1.0);
 587         video::SColorf bgcolor_bright_dawn_f(0.666, 0.549, 0.220, 1.0);
 588         video::SColorf bgcolor_bright_dawn_f(0.666 * 1.2, 0.549 * 1.0, 0.220 * 1.0, 1.0);
 589         video::SColorf bgcolor_bright_dawn_f(0.666 * 1.2, 0.549 * 1.0, 0.220 * 1.2, 1.0);
 590
 591         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.591, 0.4);
 592         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
 593         video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
 594         */
 595
 596         video::SColorf bgcolor_bright_normal_f = video::SColor(255, 155, 193, 240);
 597         video::SColorf bgcolor_bright_indoor_f = video::SColor(255, 100, 100, 100);
 598         video::SColorf bgcolor_bright_dawn_f = video::SColor(255, 186, 193, 240);
 599         video::SColorf bgcolor_bright_night_f = video::SColor(255, 64, 144, 255);
 600
 601         video::SColorf skycolor_bright_normal_f = video::SColor(255, 140, 186, 250);
 602         video::SColorf skycolor_bright_dawn_f = video::SColor(255, 180, 186, 250);
 603         video::SColorf skycolor_bright_night_f = video::SColor(255, 0, 107, 255);
 604
 605         // pure white: becomes "diffuse light component" for clouds
 606         video::SColorf cloudcolor_bright_normal_f = video::SColor(255, 255, 255, 255);
 607         // dawn-factoring version of pure white (note: R is above 1.0)
 608         video::SColorf cloudcolor_bright_dawn_f(255.0f/240.0f, 223.0f/240.0f, 191.0f/255.0f);
 609
 610         float cloud_color_change_fraction = 0.95;
 611         if (sunlight_seen) {
 612                 if (std::fabs(time_brightness - m_brightness) < 0.2f) {
 613                         m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
 614                 } else {
 615                         m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
 616                         cloud_color_change_fraction = 0.0;
 617                 }
 618         } else {
 619                 if (direct_brightness < m_brightness)
 620                         m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
 621                 else
 622                         m_brightness = m_brightness * 0.98 + direct_brightness * 0.02;
 623         }
 624
 625         m_clouds_visible = true;
 626         float color_change_fraction = 0.98f;
 627         if (sunlight_seen) {
 628                 if (is_dawn) { // Dawn
 629                         m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 630                                 bgcolor_bright_dawn_f, color_change_fraction);
 631                         m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 632                                 skycolor_bright_dawn_f, color_change_fraction);
 633                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 634                                 cloudcolor_bright_dawn_f, color_change_fraction);
 635                 } else {
 636                         if (time_brightness < 0.13f) { // Night
 637                                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 638                                         bgcolor_bright_night_f, color_change_fraction);
 639                                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 640                                         skycolor_bright_night_f, color_change_fraction);
 641                         } else { // Day
 642                                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 643                                         bgcolor_bright_normal_f, color_change_fraction);
 644                                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 645                                         skycolor_bright_normal_f, color_change_fraction);
 646                         }
 647
 648                         m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 649                                 cloudcolor_bright_normal_f, color_change_fraction);
 650                 }
 651         } else {
 652                 m_bgcolor_bright_f = m_bgcolor_bright_f.getInterpolated(
 653                         bgcolor_bright_indoor_f, color_change_fraction);
 654                 m_skycolor_bright_f = m_skycolor_bright_f.getInterpolated(
 655                         bgcolor_bright_indoor_f, color_change_fraction);
 656                 m_cloudcolor_bright_f = m_cloudcolor_bright_f.getInterpolated(
 657                         cloudcolor_bright_normal_f, color_change_fraction);
 658                 m_clouds_visible = false;
 659         }
 660
 661         video::SColor bgcolor_bright = m_bgcolor_bright_f.toSColor();
 662         m_bgcolor = video::SColor(
 663                 255,
 664                 bgcolor_bright.getRed() * m_brightness,
 665                 bgcolor_bright.getGreen() * m_brightness,
 666                 bgcolor_bright.getBlue() * m_brightness
 667         );
 668
 669         video::SColor skycolor_bright = m_skycolor_bright_f.toSColor();
 670         m_skycolor = video::SColor(
 671                 255,
 672                 skycolor_bright.getRed() * m_brightness,
 673                 skycolor_bright.getGreen() * m_brightness,
 674                 skycolor_bright.getBlue() * m_brightness
 675         );
 676
 677         // Horizon coloring based on sun and moon direction during sunset and sunrise
 678         video::SColor pointcolor = video::SColor(m_bgcolor.getAlpha(), 255, 255, 255);
 679         if (m_directional_colored_fog) {
 680                 if (m_horizon_blend() != 0) {
 681                         // Calculate hemisphere value from yaw, (inverted in third person front view)
 682                         s8 dir_factor = 1;
 683                         if (cam_mode > CAMERA_MODE_THIRD)
 684                                 dir_factor = -1;
 685                         f32 pointcolor_blend = wrapDegrees_0_360(yaw * dir_factor + 90);
 686                         if (pointcolor_blend > 180)
 687                                 pointcolor_blend = 360 - pointcolor_blend;
 688                         pointcolor_blend /= 180;
 689                         // Bound view angle to determine where transition starts and ends
 690                         pointcolor_blend = rangelim(1 - pointcolor_blend * 1.375, 0, 1 / 1.375) *
 691                                 1.375;
 692                         // Combine the colors when looking up or down, otherwise turning looks weird
 693                         pointcolor_blend += (0.5 - pointcolor_blend) *
 694                                 (1 - MYMIN((90 - std::fabs(pitch)) / 90 * 1.5, 1));
 695                         // Invert direction to match where the sun and moon are rising
 696                         if (m_time_of_day > 0.5)
 697                                 pointcolor_blend = 1 - pointcolor_blend;
 698                         // Horizon colors of sun and moon
 699                         f32 pointcolor_light = rangelim(m_time_brightness * 3, 0.2, 1);
 700
 701                         video::SColorf pointcolor_sun_f(1, 1, 1, 1);
 702                         if (m_sun_tonemap) {
 703                                 pointcolor_sun_f.r = pointcolor_light *
 704                                         (float)m_materials[3].EmissiveColor.getRed() / 255;
 705                                 pointcolor_sun_f.b = pointcolor_light *
 706                                         (float)m_materials[3].EmissiveColor.getBlue() / 255;
 707                                 pointcolor_sun_f.g = pointcolor_light *
 708                                         (float)m_materials[3].EmissiveColor.getGreen() / 255;
 709                         } else {
 710                                 pointcolor_sun_f.r = pointcolor_light * 1;
 711                                 pointcolor_sun_f.b = pointcolor_light *
 712                                         (0.25 + (rangelim(m_time_brightness, 0.25, 0.75) - 0.25) * 2 * 0.75);
 713                                 pointcolor_sun_f.g = pointcolor_light * (pointcolor_sun_f.b * 0.375 +
 714                                         (rangelim(m_time_brightness, 0.05, 0.15) - 0.05) * 10 * 0.625);
 715                         }
 716
 717                         video::SColorf pointcolor_moon_f(0.5 * pointcolor_light,
 718                                 0.6 * pointcolor_light, 0.8 * pointcolor_light, 1);
 719                         if (m_moon_tonemap) {
 720                                 pointcolor_moon_f.r = pointcolor_light *
 721                                         (float)m_materials[4].EmissiveColor.getRed() / 255;
 722                                 pointcolor_moon_f.b = pointcolor_light *
 723                                         (float)m_materials[4].EmissiveColor.getBlue() / 255;
 724                                 pointcolor_moon_f.g = pointcolor_light *
 725                                         (float)m_materials[4].EmissiveColor.getGreen() / 255;
 726                         }
 727
 728                         video::SColor pointcolor_sun = pointcolor_sun_f.toSColor();
 729                         video::SColor pointcolor_moon = pointcolor_moon_f.toSColor();
 730                         // Calculate the blend color
 731                         pointcolor = m_mix_scolor(pointcolor_moon, pointcolor_sun, pointcolor_blend);
 732                 }
 733                 m_bgcolor = m_mix_scolor(m_bgcolor, pointcolor, m_horizon_blend() * 0.5);
 734                 m_skycolor = m_mix_scolor(m_skycolor, pointcolor, m_horizon_blend() * 0.25);
 735         }
 736
 737         float cloud_direct_brightness = 0.0f;
 738         if (sunlight_seen) {
 739                 if (!m_directional_colored_fog) {
 740                         cloud_direct_brightness = time_brightness;
 741                         // Boost cloud brightness relative to sky, at dawn, dusk and at night
 742                         if (time_brightness < 0.7f)
 743                                 cloud_direct_brightness *= 1.3f;
 744                 } else {
 745                         cloud_direct_brightness = std::fmin(m_horizon_blend() * 0.15f +
 746                                 m_time_brightness, 1.0f);
 747                         // Set the same minimum cloud brightness at night
 748                         if (time_brightness < 0.5f)
 749                                 cloud_direct_brightness = std::fmax(cloud_direct_brightness,
 750                                         time_brightness * 1.3f);
 751                 }
 752         } else {
 753                 cloud_direct_brightness = direct_brightness;
 754         }
 755
 756         m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
 757                 cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
 758         m_cloudcolor_f = video::SColorf(
 759                 m_cloudcolor_bright_f.r * m_cloud_brightness,
 760                 m_cloudcolor_bright_f.g * m_cloud_brightness,
 761                 m_cloudcolor_bright_f.b * m_cloud_brightness,
 762                 1.0
 763         );
 764         if (m_directional_colored_fog) {
 765                 m_cloudcolor_f = m_mix_scolorf(m_cloudcolor_f,
 766                         video::SColorf(pointcolor), m_horizon_blend() * 0.25);
 767         }
 768 }