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