src/farmesh.cpp

   1 /*
   2 Part of Minetest-c55
   3 Copyright (C) 2011 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 /*
  21         A quick messy implementation of terrain rendering for a long
  22         distance according to map seed
  23 */
  24
  25 #include "farmesh.h"
  26
  27 #include "constants.h"
  28 #include "debug.h"
  29 #include "noise.h"
  30 #include "map.h"
  31 #include "client.h"
  32 #include "tile.h" // ITextureSource
  33 #include "clientmap.h"
  34
  35 #include "mapgen.h" // Shouldn't really be done this way
  36
  37 FarMesh::FarMesh(
  38                 scene::ISceneNode* parent,
  39                 scene::ISceneManager* mgr,
  40                 s32 id,
  41                 u64 seed,
  42                 Client *client
  43 ):
  44         scene::ISceneNode(parent, mgr, id),
  45         m_seed(seed),
  46         m_camera_pos(0,0),
  47         m_time(0),
  48         m_client(client),
  49         m_render_range(20*MAP_BLOCKSIZE)
  50 {
  51         dstream<<__FUNCTION_NAME<<std::endl;
  52
  53         //video::IVideoDriver* driver = mgr->getVideoDriver();
  54
  55         m_materials[0].setFlag(video::EMF_LIGHTING, false);
  56         m_materials[0].setFlag(video::EMF_BACK_FACE_CULLING, true);
  57         //m_materials[0].setFlag(video::EMF_BACK_FACE_CULLING, false);
  58         m_materials[0].setFlag(video::EMF_BILINEAR_FILTER, false);
  59         m_materials[0].setFlag(video::EMF_FOG_ENABLE, false);
  60         //m_materials[0].setFlag(video::EMF_ANTI_ALIASING, true);
  61         //m_materials[0].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
  62         m_materials[0].setFlag(video::EMF_FOG_ENABLE, true);
  63
  64         m_materials[1].setFlag(video::EMF_LIGHTING, false);
  65         m_materials[1].setFlag(video::EMF_BACK_FACE_CULLING, false);
  66         m_materials[1].setFlag(video::EMF_BILINEAR_FILTER, false);
  67         m_materials[1].setFlag(video::EMF_FOG_ENABLE, false);
  68         m_materials[1].setTexture(0, client->tsrc()->getTextureRaw("treeprop.png"));
  69         m_materials[1].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
  70         m_materials[1].setFlag(video::EMF_FOG_ENABLE, true);
  71
  72         m_box = core::aabbox3d<f32>(-BS*1000000,-BS*31000,-BS*1000000,
  73                         BS*1000000,BS*31000,BS*1000000);
  74
  75 }
  76
  77 FarMesh::~FarMesh()
  78 {
  79         dstream<<__FUNCTION_NAME<<std::endl;
  80 }
  81
  82 u32 FarMesh::getMaterialCount() const
  83 {
  84         return FARMESH_MATERIAL_COUNT;
  85 }
  86
  87 video::SMaterial& FarMesh::getMaterial(u32 i)
  88 {
  89         return m_materials[i];
  90 }
  91
  92
  93 void FarMesh::OnRegisterSceneNode()
  94 {
  95         if(IsVisible)
  96         {
  97                 //SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
  98                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
  99                 //SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
 100         }
 101
 102         ISceneNode::OnRegisterSceneNode();
 103 }
 104
 105 #define MYROUND(x) (x > 0.0 ? (int)x : (int)x - 1)
 106
 107 // Temporary hack
 108 struct HeightPoint
 109 {
 110         float gh; // ground height
 111         float ma; // mud amount
 112         float have_sand;
 113         float tree_amount;
 114 };
 115 core::map<v2s16, HeightPoint> g_heights;
 116
 117 HeightPoint ground_height(u64 seed, v2s16 p2d)
 118 {
 119         core::map<v2s16, HeightPoint>::Node *n = g_heights.find(p2d);
 120         if(n)
 121                 return n->getValue();
 122         HeightPoint hp;
 123         s16 level = mapgen::find_ground_level_from_noise(seed, p2d, 3);
 124         hp.gh = (level-4)*BS;
 125         hp.ma = (4)*BS;
 126         /*hp.gh = BS*base_rock_level_2d(seed, p2d);
 127         hp.ma = BS*get_mud_add_amount(seed, p2d);*/
 128         hp.have_sand = mapgen::get_have_sand(seed, p2d);
 129         if(hp.gh > BS*WATER_LEVEL)
 130                 hp.tree_amount = mapgen::tree_amount_2d(seed, p2d);
 131         else
 132                 hp.tree_amount = 0;
 133         // No mud has been added if mud amount is less than 1
 134         if(hp.ma < 1.0*BS)
 135                 hp.ma = 0.0;
 136         //hp.gh -= BS*3; // Lower a bit so that it is not that much in the way
 137         g_heights[p2d] = hp;
 138         return hp;
 139 }
 140
 141 void FarMesh::render()
 142 {
 143         video::IVideoDriver* driver = SceneManager->getVideoDriver();
 144
 145         /*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_TRANSPARENT)
 146                 return;*/
 147         if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SOLID)
 148                 return;
 149         /*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SKY_BOX)
 150                 return;*/
 151
 152         driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
 153
 154         //const s16 grid_radius_i = 12;
 155         //const float grid_size = BS*50;
 156         const s16 grid_radius_i = m_render_range/MAP_BLOCKSIZE;
 157         const float grid_size = BS*MAP_BLOCKSIZE;
 158         const v2f grid_speed(-BS*0, 0);
 159
 160         // Position of grid noise origin in world coordinates
 161         v2f world_grid_origin_pos_f(0,0);
 162         // Position of grid noise origin from the camera
 163         v2f grid_origin_from_camera_f = world_grid_origin_pos_f - m_camera_pos;
 164         // The center point of drawing in the noise
 165         v2f center_of_drawing_in_noise_f = -grid_origin_from_camera_f;
 166         // The integer center point of drawing in the noise
 167         v2s16 center_of_drawing_in_noise_i(
 168                 MYROUND(center_of_drawing_in_noise_f.X / grid_size),
 169                 MYROUND(center_of_drawing_in_noise_f.Y / grid_size)
 170         );
 171         // The world position of the integer center point of drawing in the noise
 172         v2f world_center_of_drawing_in_noise_f = v2f(
 173                 center_of_drawing_in_noise_i.X * grid_size,
 174                 center_of_drawing_in_noise_i.Y * grid_size
 175         ) + world_grid_origin_pos_f;
 176
 177         for(s16 zi=-grid_radius_i; zi<grid_radius_i; zi++)
 178         for(s16 xi=-grid_radius_i; xi<grid_radius_i; xi++)
 179         {
 180                 /*// Don't draw very close to player
 181                 s16 dd = 3;
 182                 if(zi > -dd && zi < dd && xi > -dd && xi < dd)
 183                         continue;*/
 184
 185                 v2s16 p_in_noise_i(
 186                         xi+center_of_drawing_in_noise_i.X,
 187                         zi+center_of_drawing_in_noise_i.Y
 188                 );
 189
 190                 // If sector was drawn, don't draw it this way
 191                 if(m_client->m_env.getClientMap().sectorWasDrawn(p_in_noise_i))
 192                         continue;
 193
 194                 /*if((p_in_noise_i.X + p_in_noise_i.Y)%2==0)
 195                         continue;*/
 196                 /*if((p_in_noise_i.X/2 + p_in_noise_i.Y/2)%2==0)
 197                         continue;*/
 198
 199                 v2f p0 = v2f(xi,zi)*grid_size + world_center_of_drawing_in_noise_f;
 200
 201                 /*double noise[4];
 202                 double d = 100*BS;
 203                 noise[0] = d*noise2d_perlin(
 204                                 (float)(p_in_noise_i.X+0)*grid_size/BS/100,
 205                                 (float)(p_in_noise_i.Y+0)*grid_size/BS/100,
 206                                 m_seed, 3, 0.5);
 207
 208                 noise[1] = d*noise2d_perlin(
 209                                 (float)(p_in_noise_i.X+0)*grid_size/BS/100,
 210                                 (float)(p_in_noise_i.Y+1)*grid_size/BS/100,
 211                                 m_seed, 3, 0.5);
 212
 213                 noise[2] = d*noise2d_perlin(
 214                                 (float)(p_in_noise_i.X+1)*grid_size/BS/100,
 215                                 (float)(p_in_noise_i.Y+1)*grid_size/BS/100,
 216                                 m_seed, 3, 0.5);
 217
 218                 noise[3] = d*noise2d_perlin(
 219                                 (float)(p_in_noise_i.X+1)*grid_size/BS/100,
 220                                 (float)(p_in_noise_i.Y+0)*grid_size/BS/100,
 221                                 m_seed, 3, 0.5);*/
 222
 223                 HeightPoint hps[5];
 224                 hps[0] = ground_height(m_seed, v2s16(
 225                                 (p_in_noise_i.X+0)*grid_size/BS,
 226                                 (p_in_noise_i.Y+0)*grid_size/BS));
 227                 hps[1] = ground_height(m_seed, v2s16(
 228                                 (p_in_noise_i.X+0)*grid_size/BS,
 229                                 (p_in_noise_i.Y+1)*grid_size/BS));
 230                 hps[2] = ground_height(m_seed, v2s16(
 231                                 (p_in_noise_i.X+1)*grid_size/BS,
 232                                 (p_in_noise_i.Y+1)*grid_size/BS));
 233                 hps[3] = ground_height(m_seed, v2s16(
 234                                 (p_in_noise_i.X+1)*grid_size/BS,
 235                                 (p_in_noise_i.Y+0)*grid_size/BS));
 236                 v2s16 centerpoint(
 237                                 (p_in_noise_i.X+0)*grid_size/BS+MAP_BLOCKSIZE/2,
 238                                 (p_in_noise_i.Y+0)*grid_size/BS+MAP_BLOCKSIZE/2);
 239                 hps[4] = ground_height(m_seed, centerpoint);
 240
 241                 float noise[5];
 242                 float h_min = BS*65535;
 243                 float h_max = -BS*65536;
 244                 float ma_avg = 0;
 245                 float h_avg = 0;
 246                 u32 have_sand_count = 0;
 247                 float tree_amount_avg = 0;
 248                 for(u32 i=0; i<5; i++)
 249                 {
 250                         noise[i] = hps[i].gh + hps[i].ma;
 251                         if(noise[i] < h_min)
 252                                 h_min = noise[i];
 253                         if(noise[i] > h_max)
 254                                 h_max = noise[i];
 255                         ma_avg += hps[i].ma;
 256                         h_avg += noise[i];
 257                         if(hps[i].have_sand)
 258                                 have_sand_count++;
 259                         tree_amount_avg += hps[i].tree_amount;
 260                 }
 261                 ma_avg /= 5.0;
 262                 h_avg /= 5.0;
 263                 tree_amount_avg /= 5.0;
 264
 265                 float steepness = (h_max - h_min)/grid_size;
 266
 267                 float light_f = noise[0]+noise[1]-noise[2]-noise[3];
 268                 light_f /= 100;
 269                 if(light_f < -1.0) light_f = -1.0;
 270                 if(light_f > 1.0) light_f = 1.0;
 271                 //light_f += 1.0;
 272                 //light_f /= 2.0;
 273
 274                 v2f p1 = p0 + v2f(1,1)*grid_size;
 275
 276                 bool ground_is_sand = false;
 277                 bool ground_is_rock = false;
 278                 bool ground_is_mud = false;
 279                 video::SColor c;
 280                 // Detect water
 281                 if(h_avg < WATER_LEVEL*BS && h_max < (WATER_LEVEL+5)*BS)
 282                 {
 283                         //c = video::SColor(255,59,86,146);
 284                         //c = video::SColor(255,82,120,204);
 285                         c = video::SColor(255,74,105,170);
 286
 287                         /*// Set to water level
 288                         for(u32 i=0; i<4; i++)
 289                         {
 290                                 if(noise[i] < BS*WATER_LEVEL)
 291                                         noise[i] = BS*WATER_LEVEL;
 292                         }*/
 293                         light_f = 0;
 294                 }
 295                 // Steep cliffs
 296                 else if(steepness > 2.0)
 297                 {
 298                         c = video::SColor(255,128,128,128);
 299                         ground_is_rock = true;
 300                 }
 301                 // Basic ground
 302                 else
 303                 {
 304                         if(ma_avg < 2.0*BS)
 305                         {
 306                                 c = video::SColor(255,128,128,128);
 307                                 ground_is_rock = true;
 308                         }
 309                         else
 310                         {
 311                                 if(h_avg <= 2.5*BS && have_sand_count >= 2)
 312                                 {
 313                                         c = video::SColor(255,210,194,156);
 314                                         ground_is_sand = true;
 315                                 }
 316                                 else
 317                                 {
 318                                         /*// Trees if there are over 0.01 trees per MapNode
 319                                         if(tree_amount_avg > 0.01)
 320                                                 c = video::SColor(255,50,128,50);
 321                                         else
 322                                                 c = video::SColor(255,107,134,51);*/
 323                                         c = video::SColor(255,107,134,51);
 324                                         ground_is_mud = true;
 325                                 }
 326                         }
 327                 }
 328
 329                 // Set to water level
 330                 for(u32 i=0; i<4; i++)
 331                 {
 332                         if(noise[i] < BS*WATER_LEVEL)
 333                                 noise[i] = BS*WATER_LEVEL;
 334                 }
 335
 336                 float b = m_brightness + light_f*0.1*m_brightness;
 337                 if(b < 0) b = 0;
 338                 if(b > 2) b = 2;
 339
 340                 c = video::SColor(255, b*c.getRed(), b*c.getGreen(), b*c.getBlue());
 341
 342                 driver->setMaterial(m_materials[0]);
 343
 344                 video::S3DVertex vertices[4] =
 345                 {
 346                         video::S3DVertex(p0.X,noise[0],p0.Y, 0,0,0, c, 0,1),
 347                         video::S3DVertex(p0.X,noise[1],p1.Y, 0,0,0, c, 1,1),
 348                         video::S3DVertex(p1.X,noise[2],p1.Y, 0,0,0, c, 1,0),
 349                         video::S3DVertex(p1.X,noise[3],p0.Y, 0,0,0, c, 0,0),
 350                 };
 351                 u16 indices[] = {0,1,2,2,3,0};
 352                 driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
 353                                 video::EVT_STANDARD, scene::EPT_TRIANGLES, video::EIT_16BIT);
 354
 355                 // Add some trees if appropriate
 356                 if(tree_amount_avg >= 0.0065 && steepness < 1.4
 357                                 && ground_is_mud == true)
 358                 {
 359                         driver->setMaterial(m_materials[1]);
 360
 361                         float b = m_brightness;
 362                         c = video::SColor(255, b*255, b*255, b*255);
 363
 364                         {
 365                                 video::S3DVertex vertices[4] =
 366                                 {
 367                                         video::S3DVertex(p0.X,noise[0],p0.Y,
 368                                                         0,0,0, c, 0,1),
 369                                         video::S3DVertex(p0.X,noise[0]+BS*MAP_BLOCKSIZE,p0.Y,
 370                                                         0,0,0, c, 0,0),
 371                                         video::S3DVertex(p1.X,noise[2]+BS*MAP_BLOCKSIZE,p1.Y,
 372                                                         0,0,0, c, 1,0),
 373                                         video::S3DVertex(p1.X,noise[2],p1.Y,
 374                                                         0,0,0, c, 1,1),
 375                                 };
 376                                 u16 indices[] = {0,1,2,2,3,0};
 377                                 driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
 378                                                 video::EVT_STANDARD, scene::EPT_TRIANGLES,
 379                                                 video::EIT_16BIT);
 380                         }
 381                         {
 382                                 video::S3DVertex vertices[4] =
 383                                 {
 384                                         video::S3DVertex(p1.X,noise[3],p0.Y,
 385                                                         0,0,0, c, 0,1),
 386                                         video::S3DVertex(p1.X,noise[3]+BS*MAP_BLOCKSIZE,p0.Y,
 387                                                         0,0,0, c, 0,0),
 388                                         video::S3DVertex(p0.X,noise[1]+BS*MAP_BLOCKSIZE,p1.Y,
 389                                                         0,0,0, c, 1,0),
 390                                         video::S3DVertex(p0.X,noise[1],p1.Y,
 391                                                         0,0,0, c, 1,1),
 392                                 };
 393                                 u16 indices[] = {0,1,2,2,3,0};
 394                                 driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
 395                                                 video::EVT_STANDARD, scene::EPT_TRIANGLES,
 396                                                 video::EIT_16BIT);
 397                         }
 398                 }
 399         }
 400
 401         //driver->clearZBuffer();
 402 }
 403
 404 void FarMesh::step(float dtime)
 405 {
 406         m_time += dtime;
 407 }
 408
 409 void FarMesh::update(v2f camera_p, float brightness, s16 render_range)
 410 {
 411         m_camera_pos = camera_p;
 412         m_brightness = brightness;
 413         m_render_range = render_range;
 414 }
 415
 416