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