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 /*
  33         Temporarily exposed map generator stuff
  34         Should only be used for testing
  35 */
  36 extern double base_rock_level_2d(u64 seed, v2s16 p);
  37 extern double get_mud_add_amount(u64 seed, v2s16 p);
  38 extern bool get_have_sand(u64 seed, v2s16 p2d);
  39 extern double tree_amount_2d(u64 seed, v2s16 p);
  40
  41
  42 FarMesh::FarMesh(
  43                 scene::ISceneNode* parent,
  44                 scene::ISceneManager* mgr,
  45                 s32 id,
  46                 u64 seed,
  47                 Client *client
  48 ):
  49         scene::ISceneNode(parent, mgr, id),
  50         m_seed(seed),
  51         m_camera_pos(0,0),
  52         m_time(0),
  53         m_client(client)
  54 {
  55         dstream<<__FUNCTION_NAME<<std::endl;
  56
  57         video::IVideoDriver* driver = mgr->getVideoDriver();
  58
  59         m_materials[0].setFlag(video::EMF_LIGHTING, false);
  60         m_materials[0].setFlag(video::EMF_BACK_FACE_CULLING, true);
  61         //m_materials[0].setFlag(video::EMF_BACK_FACE_CULLING, false);
  62         m_materials[0].setFlag(video::EMF_BILINEAR_FILTER, false);
  63         m_materials[0].setFlag(video::EMF_FOG_ENABLE, false);
  64         //m_materials[0].setFlag(video::EMF_ANTI_ALIASING, true);
  65         //m_materials[0].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
  66         m_materials[0].setFlag(video::EMF_FOG_ENABLE, true);
  67
  68         m_materials[1].setFlag(video::EMF_LIGHTING, false);
  69         m_materials[1].setFlag(video::EMF_BACK_FACE_CULLING, false);
  70         m_materials[1].setFlag(video::EMF_BILINEAR_FILTER, false);
  71         m_materials[1].setFlag(video::EMF_FOG_ENABLE, false);
  72         m_materials[1].setTexture
  73                         (0, driver->getTexture(getTexturePath("treeprop.png").c_str()));
  74         m_materials[1].MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
  75         m_materials[1].setFlag(video::EMF_FOG_ENABLE, true);
  76
  77         m_box = core::aabbox3d<f32>(-BS*1000000,-BS*31000,-BS*1000000,
  78                         BS*1000000,BS*31000,BS*1000000);
  79
  80 }
  81
  82 FarMesh::~FarMesh()
  83 {
  84         dstream<<__FUNCTION_NAME<<std::endl;
  85 }
  86
  87 u32 FarMesh::getMaterialCount() const
  88 {
  89         return FARMESH_MATERIAL_COUNT;
  90 }
  91
  92 video::SMaterial& FarMesh::getMaterial(u32 i)
  93 {
  94         return m_materials[i];
  95 }
  96
  97
  98 void FarMesh::OnRegisterSceneNode()
  99 {
 100         if(IsVisible)
 101         {
 102                 //SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
 103                 SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
 104                 //SceneManager->registerNodeForRendering(this, scene::ESNRP_SKY_BOX);
 105         }
 106
 107         ISceneNode::OnRegisterSceneNode();
 108 }
 109
 110 #define MYROUND(x) (x > 0.0 ? (int)x : (int)x - 1)
 111
 112 // Temporary hack
 113 struct HeightPoint
 114 {
 115         float gh; // ground height
 116         float ma; // mud amount
 117         float have_sand;
 118         float tree_amount;
 119 };
 120 core::map<v2s16, HeightPoint> g_heights;
 121
 122 HeightPoint ground_height(u64 seed, v2s16 p2d)
 123 {
 124         core::map<v2s16, HeightPoint>::Node *n = g_heights.find(p2d);
 125         if(n)
 126                 return n->getValue();
 127         HeightPoint hp;
 128         hp.gh = BS*base_rock_level_2d(seed, p2d);
 129         hp.ma = BS*get_mud_add_amount(seed, p2d);
 130         hp.have_sand = get_have_sand(seed, p2d);
 131         if(hp.gh > BS*WATER_LEVEL)
 132                 hp.tree_amount = tree_amount_2d(seed, p2d);
 133         else
 134                 hp.tree_amount = 0;
 135         // No mud has been added if mud amount is less than 1
 136         if(hp.ma < 1.0*BS)
 137                 hp.ma = 0.0;
 138         hp.gh -= BS*3; // Lower a bit so that it is not that much in the way
 139         g_heights[p2d] = hp;
 140         return hp;
 141 }
 142
 143 void FarMesh::render()
 144 {
 145         video::IVideoDriver* driver = SceneManager->getVideoDriver();
 146
 147         /*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_TRANSPARENT)
 148                 return;*/
 149         if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SOLID)
 150                 return;
 151         /*if(SceneManager->getSceneNodeRenderPass() != scene::ESNRP_SKY_BOX)
 152                 return;*/
 153
 154         driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
 155
 156         //const s16 grid_radius_i = 12;
 157         //const float grid_size = BS*50;
 158         const s16 grid_radius_i = 20;
 159         const float grid_size = BS*MAP_BLOCKSIZE;
 160         const v2f grid_speed(-BS*0, 0);
 161
 162         // Position of grid noise origin in world coordinates
 163         v2f world_grid_origin_pos_f(0,0);
 164         // Position of grid noise origin from the camera
 165         v2f grid_origin_from_camera_f = world_grid_origin_pos_f - m_camera_pos;
 166         // The center point of drawing in the noise
 167         v2f center_of_drawing_in_noise_f = -grid_origin_from_camera_f;
 168         // The integer center point of drawing in the noise
 169         v2s16 center_of_drawing_in_noise_i(
 170                 MYROUND(center_of_drawing_in_noise_f.X / grid_size),
 171                 MYROUND(center_of_drawing_in_noise_f.Y / grid_size)
 172         );
 173         // The world position of the integer center point of drawing in the noise
 174         v2f world_center_of_drawing_in_noise_f = v2f(
 175                 center_of_drawing_in_noise_i.X * grid_size,
 176                 center_of_drawing_in_noise_i.Y * grid_size
 177         ) + world_grid_origin_pos_f;
 178
 179         for(s16 zi=-grid_radius_i; zi<grid_radius_i; zi++)
 180         for(s16 xi=-grid_radius_i; xi<grid_radius_i; xi++)
 181         {
 182                 /*// Don't draw very close to player
 183                 s16 dd = 3;
 184                 if(zi > -dd && zi < dd && xi > -dd && xi < dd)
 185                         continue;*/
 186
 187                 v2s16 p_in_noise_i(
 188                         xi+center_of_drawing_in_noise_i.X,
 189                         zi+center_of_drawing_in_noise_i.Y
 190                 );
 191
 192                 // If sector was drawn, don't draw it this way
 193                 if(m_client->m_env.getClientMap().sectorWasDrawn(p_in_noise_i))
 194                         continue;
 195
 196                 /*if((p_in_noise_i.X + p_in_noise_i.Y)%2==0)
 197                         continue;*/
 198                 /*if((p_in_noise_i.X/2 + p_in_noise_i.Y/2)%2==0)
 199                         continue;*/
 200
 201                 v2f p0 = v2f(xi,zi)*grid_size + world_center_of_drawing_in_noise_f;
 202
 203                 /*double noise[4];
 204                 double d = 100*BS;
 205                 noise[0] = d*noise2d_perlin(
 206                                 (float)(p_in_noise_i.X+0)*grid_size/BS/100,
 207                                 (float)(p_in_noise_i.Y+0)*grid_size/BS/100,
 208                                 m_seed, 3, 0.5);
 209
 210                 noise[1] = d*noise2d_perlin(
 211                                 (float)(p_in_noise_i.X+0)*grid_size/BS/100,
 212                                 (float)(p_in_noise_i.Y+1)*grid_size/BS/100,
 213                                 m_seed, 3, 0.5);
 214
 215                 noise[2] = d*noise2d_perlin(
 216                                 (float)(p_in_noise_i.X+1)*grid_size/BS/100,
 217                                 (float)(p_in_noise_i.Y+1)*grid_size/BS/100,
 218                                 m_seed, 3, 0.5);
 219
 220                 noise[3] = d*noise2d_perlin(
 221                                 (float)(p_in_noise_i.X+1)*grid_size/BS/100,
 222                                 (float)(p_in_noise_i.Y+0)*grid_size/BS/100,
 223                                 m_seed, 3, 0.5);*/
 224
 225                 HeightPoint hps[5];
 226                 hps[0] = ground_height(m_seed, v2s16(
 227                                 (p_in_noise_i.X+0)*grid_size/BS,
 228                                 (p_in_noise_i.Y+0)*grid_size/BS));
 229                 hps[1] = ground_height(m_seed, v2s16(
 230                                 (p_in_noise_i.X+0)*grid_size/BS,
 231                                 (p_in_noise_i.Y+1)*grid_size/BS));
 232                 hps[2] = ground_height(m_seed, v2s16(
 233                                 (p_in_noise_i.X+1)*grid_size/BS,
 234                                 (p_in_noise_i.Y+1)*grid_size/BS));
 235                 hps[3] = ground_height(m_seed, v2s16(
 236                                 (p_in_noise_i.X+1)*grid_size/BS,
 237                                 (p_in_noise_i.Y+0)*grid_size/BS));
 238                 v2s16 centerpoint(
 239                                 (p_in_noise_i.X+0)*grid_size/BS+MAP_BLOCKSIZE/2,
 240                                 (p_in_noise_i.Y+0)*grid_size/BS+MAP_BLOCKSIZE/2);
 241                 hps[4] = ground_height(m_seed, centerpoint);
 242
 243                 float noise[5];
 244                 float h_min = BS*65535;
 245                 float h_max = -BS*65536;
 246                 float ma_avg = 0;
 247                 float h_avg = 0;
 248                 u32 have_sand_count = 0;
 249                 float tree_amount_avg = 0;
 250                 for(u32 i=0; i<5; i++)
 251                 {
 252                         noise[i] = hps[i].gh + hps[i].ma;
 253                         if(noise[i] < h_min)
 254                                 h_min = noise[i];
 255                         if(noise[i] > h_max)
 256                                 h_max = noise[i];
 257                         ma_avg += hps[i].ma;
 258                         h_avg += noise[i];
 259                         if(hps[i].have_sand)
 260                                 have_sand_count++;
 261                         tree_amount_avg += hps[i].tree_amount;
 262                 }
 263                 ma_avg /= 5.0;
 264                 h_avg /= 5.0;
 265                 tree_amount_avg /= 5.0;
 266
 267                 float steepness = (h_max - h_min)/grid_size;
 268
 269                 float light_f = noise[0]+noise[1]-noise[2]-noise[3];
 270                 light_f /= 100;
 271                 if(light_f < -1.0) light_f = -1.0;
 272                 if(light_f > 1.0) light_f = 1.0;
 273                 //light_f += 1.0;
 274                 //light_f /= 2.0;
 275
 276                 v2f p1 = p0 + v2f(1,1)*grid_size;
 277
 278                 bool ground_is_sand = false;
 279                 bool ground_is_rock = false;
 280                 bool ground_is_mud = false;
 281                 video::SColor c;
 282                 // Detect water
 283                 if(h_avg < WATER_LEVEL*BS && h_max < (WATER_LEVEL+5)*BS)
 284                 {
 285                         //c = video::SColor(255,59,86,146);
 286                         c = video::SColor(255,82,120,204);
 287
 288                         /*// Set to water level
 289                         for(u32 i=0; i<4; i++)
 290                         {
 291                                 if(noise[i] < BS*WATER_LEVEL)
 292                                         noise[i] = BS*WATER_LEVEL;
 293                         }*/
 294                         light_f = 0;
 295                 }
 296                 // Steep cliffs
 297                 else if(steepness > 2.0)
 298                 {
 299                         c = video::SColor(255,128,128,128);
 300                         ground_is_rock = true;
 301                 }
 302                 // Basic ground
 303                 else
 304                 {
 305                         if(ma_avg < 2.0*BS)
 306                         {
 307                                 c = video::SColor(255,128,128,128);
 308                                 ground_is_rock = true;
 309                         }
 310                         else
 311                         {
 312                                 if(h_avg <= 2.5*BS && have_sand_count >= 2)
 313                                 {
 314                                         c = video::SColor(255,210,194,156);
 315                                         ground_is_sand = true;
 316                                 }
 317                                 else
 318                                 {
 319                                         /*// Trees if there are over 0.01 trees per MapNode
 320                                         if(tree_amount_avg > 0.01)
 321                                                 c = video::SColor(255,50,128,50);
 322                                         else
 323                                                 c = video::SColor(255,107,134,51);*/
 324                                         c = video::SColor(255,107,134,51);
 325                                         ground_is_mud = true;
 326                                 }
 327                         }
 328                 }
 329
 330                 // Set to water level
 331                 for(u32 i=0; i<4; i++)
 332                 {
 333                         if(noise[i] < BS*WATER_LEVEL)
 334                                 noise[i] = BS*WATER_LEVEL;
 335                 }
 336
 337                 float b = m_brightness + light_f*0.1*m_brightness;
 338                 if(b < 0) b = 0;
 339                 if(b > 2) b = 2;
 340
 341                 c = video::SColor(255, b*c.getRed(), b*c.getGreen(), b*c.getBlue());
 342
 343                 driver->setMaterial(m_materials[0]);
 344
 345                 video::S3DVertex vertices[4] =
 346                 {
 347                         video::S3DVertex(p0.X,noise[0],p0.Y, 0,0,0, c, 0,1),
 348                         video::S3DVertex(p0.X,noise[1],p1.Y, 0,0,0, c, 1,1),
 349                         video::S3DVertex(p1.X,noise[2],p1.Y, 0,0,0, c, 1,0),
 350                         video::S3DVertex(p1.X,noise[3],p0.Y, 0,0,0, c, 0,0),
 351                 };
 352                 u16 indices[] = {0,1,2,2,3,0};
 353                 driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
 354                                 video::EVT_STANDARD, scene::EPT_TRIANGLES, video::EIT_16BIT);
 355
 356                 // Add some trees if appropriate
 357                 if(tree_amount_avg >= 0.005 && steepness < 1.0
 358                                 && ground_is_mud == true)
 359                 {
 360                         driver->setMaterial(m_materials[1]);
 361
 362                         float b = m_brightness;
 363                         c = video::SColor(255, b*255, b*255, b*255);
 364
 365                         {
 366                                 video::S3DVertex vertices[4] =
 367                                 {
 368                                         video::S3DVertex(p0.X,noise[0],p0.Y,
 369                                                         0,0,0, c, 0,1),
 370                                         video::S3DVertex(p0.X,noise[1]+BS*MAP_BLOCKSIZE,p0.Y,
 371                                                         0,0,0, c, 0,0),
 372                                         video::S3DVertex(p1.X,noise[2]+BS*MAP_BLOCKSIZE,p1.Y,
 373                                                         0,0,0, c, 1,0),
 374                                         video::S3DVertex(p1.X,noise[3],p1.Y,
 375                                                         0,0,0, c, 1,1),
 376                                 };
 377                                 u16 indices[] = {0,1,2,2,3,0};
 378                                 driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
 379                                                 video::EVT_STANDARD, scene::EPT_TRIANGLES,
 380                                                 video::EIT_16BIT);
 381                         }
 382                         {
 383                                 video::S3DVertex vertices[4] =
 384                                 {
 385                                         video::S3DVertex(p1.X,noise[0],p0.Y,
 386                                                         0,0,0, c, 0,1),
 387                                         video::S3DVertex(p1.X,noise[1]+BS*MAP_BLOCKSIZE,p0.Y,
 388                                                         0,0,0, c, 0,0),
 389                                         video::S3DVertex(p0.X,noise[2]+BS*MAP_BLOCKSIZE,p1.Y,
 390                                                         0,0,0, c, 1,0),
 391                                         video::S3DVertex(p0.X,noise[3],p1.Y,
 392                                                         0,0,0, c, 1,1),
 393                                 };
 394                                 u16 indices[] = {0,1,2,2,3,0};
 395                                 driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
 396                                                 video::EVT_STANDARD, scene::EPT_TRIANGLES,
 397                                                 video::EIT_16BIT);
 398                         }
 399                 }
 400         }
 401
 402         //driver->clearZBuffer();
 403 }
 404
 405 void FarMesh::step(float dtime)
 406 {
 407         m_time += dtime;
 408 }
 409
 410 void FarMesh::update(v2f camera_p, float brightness)
 411 {
 412         m_camera_pos = camera_p;
 413         m_brightness = brightness;
 414 }
 415
 416