src/object/particlesystem_interactive.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   5 //
   6 //  This program is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU General Public License
   8 //  as published by the Free Software Foundation; either version 2
   9 //  of the License, or (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 #include <config.h>
  21
  22 #include <iostream>
  23 #include <cmath>
  24
  25 #include "particlesystem_interactive.hpp"
  26 #include "video/drawing_context.hpp"
  27 #include "lisp/parser.hpp"
  28 #include "lisp/lisp.hpp"
  29 #include "lisp/writer.hpp"
  30 #include "resources.hpp"
  31 #include "main.hpp"
  32
  33 #include "tile.hpp"
  34 #include "tilemap.hpp"
  35 #include "math/aatriangle.hpp"
  36 #include "collision.hpp"
  37 #include "collision_hit.hpp"
  38 #include "object/camera.hpp"
  39 #include "object/rainsplash.hpp"
  40 #include "badguy/bomb.hpp"
  41 #include "random_generator.hpp"
  42
  43 //TODO: Find a way to make rain collide with objects like bonus blocks
  44 //      Add an option to set rain strength
  45 //      Fix rain being "respawned" over solid tiles
  46 ParticleSystem_Interactive::ParticleSystem_Interactive()
  47 {
  48     virtual_width = SCREEN_WIDTH;
  49     virtual_height = SCREEN_HEIGHT;
  50     z_pos = 0;
  51 }
  52
  53 ParticleSystem_Interactive::~ParticleSystem_Interactive()
  54 {
  55     std::vector<Particle*>::iterator i;
  56     for(i = particles.begin(); i != particles.end(); ++i) {
  57         delete *i;
  58     }
  59 }
  60
  61 void ParticleSystem_Interactive::draw(DrawingContext& context)
  62 {
  63   context.push_transform();
  64
  65     std::vector<Particle*>::iterator i;
  66     for(i = particles.begin(); i != particles.end(); ++i) {
  67         Particle* particle = *i;
  68         context.draw_surface(particle->texture, particle->pos, z_pos);
  69     }
  70
  71     context.pop_transform();
  72 }
  73
  74 int
  75 ParticleSystem_Interactive::collision(Particle* object, Vector movement)
  76 {
  77   using namespace collision;
  78
  79   // calculate rectangle where the object will move
  80   float x1, x2;
  81   float y1, y2;
  82   x1 = object->pos.x;
  83   x2 = x1 + 32 + movement.x;
  84   y1 = object->pos.y;
  85   y2 = y1 + 32 + movement.y;
  86   bool water = false;
  87
  88   // test with all tiles in this rectangle
  89   int starttilex = int(x1-1) / 32;
  90   int starttiley = int(y1-1) / 32;
  91   int max_x = int(x2+1);
  92   int max_y = int(y2+1);
  93
  94   Rect dest = Rect(x1, y1, x2, y2);
  95   dest.move(movement);
  96   Constraints constraints;
  97
  98   for(std::list<TileMap*>::const_iterator i = Sector::current()->solid_tilemaps.begin(); i != Sector::current()->solid_tilemaps.end(); i++) {
  99     TileMap* solids = *i;
 100
 101     for(int x = starttilex; x*32 < max_x; ++x) {
 102       for(int y = starttiley; y*32 < max_y; ++y) {
 103         const Tile* tile = solids->get_tile(x, y);
 104         if(!tile)
 105           continue;
 106         // skip non-solid tiles, except water
 107         if(! (tile->getAttributes() & (Tile::WATER | Tile::SOLID)))
 108           continue;
 109
 110         if(tile->getAttributes() & Tile::SLOPE) { // slope tile
 111           AATriangle triangle;
 112           Vector p1(x*32, y*32);
 113           Vector p2((x+1)*32, (y+1)*32);
 114           triangle = AATriangle(p1, p2, tile->getData());
 115
 116           if(rectangle_aatriangle(&constraints, dest, triangle)) {
 117             if(tile->getAttributes() & Tile::WATER)
 118               water = true;
 119           }
 120         } else { // normal rectangular tile
 121           Rect rect(x*32, y*32, (x+1)*32, (y+1)*32);
 122           if(intersects(dest, rect)) {
 123             if(tile->getAttributes() & Tile::WATER)
 124               water = true;
 125             set_rectangle_rectangle_constraints(&constraints, dest, rect);
 126           }
 127         }
 128       }
 129     }
 130   }
 131
 132
 133   // TODO don't use magic numbers here...
 134
 135   // did we collide at all?
 136   if(!constraints.has_constraints())
 137     return -1;
 138
 139   const CollisionHit& hit = constraints.hit;
 140   if (water) {
 141     return 0; //collision with water tile - don't draw splash
 142   } else {
 143     if (hit.right || hit.left) {
 144       return 2; //collision from right
 145     } else {
 146       return 1; //collision from above
 147     }
 148   }
 149
 150   return 0;
 151 }
 152
 153 RainParticleSystem::RainParticleSystem()
 154 {
 155     rainimages[0] = new Surface("images/objects/particles/rain0.png");
 156     rainimages[1] = new Surface("images/objects/particles/rain1.png");
 157
 158     virtual_width = SCREEN_WIDTH * 2;
 159
 160     // create some random raindrops
 161     size_t raindropcount = size_t(virtual_width/6.0);
 162     for(size_t i=0; i<raindropcount; ++i) {
 163         RainParticle* particle = new RainParticle;
 164         particle->pos.x = systemRandom.rand(int(virtual_width));
 165         particle->pos.y = systemRandom.rand(int(virtual_height));
 166         int rainsize = systemRandom.rand(2);
 167         particle->texture = rainimages[rainsize];
 168         do {
 169             particle->speed = (rainsize+1)*45 + systemRandom.randf(3.6);
 170         } while(particle->speed < 1);
 171         particle->speed *= 10; // gravity
 172
 173         particles.push_back(particle);
 174     }
 175 }
 176
 177 void
 178 RainParticleSystem::parse(const lisp::Lisp& reader)
 179 {
 180   reader.get("z-pos", z_pos);
 181 }
 182
 183 void
 184 RainParticleSystem::write(lisp::Writer& writer)
 185 {
 186   writer.start_list("particles-rain");
 187   writer.write_int("z-pos", z_pos);
 188   writer.end_list("particles-rain");
 189 }
 190
 191 RainParticleSystem::~RainParticleSystem()
 192 {
 193   for(int i=0;i<2;++i)
 194     delete rainimages[i];
 195 }
 196
 197 void RainParticleSystem::update(float elapsed_time)
 198 {
 199     std::vector<Particle*>::iterator i;
 200     for(
 201         i = particles.begin(); i != particles.end(); ++i) {
 202         RainParticle* particle = (RainParticle*) *i;
 203         float movement = particle->speed * elapsed_time;
 204         float abs_x = Sector::current()->camera->get_translation().x;
 205         float abs_y = Sector::current()->camera->get_translation().y;
 206         particle->pos.y += movement;
 207         particle->pos.x -= movement;
 208         int col = collision(particle, Vector(-movement, movement));
 209         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 210             //Create rainsplash
 211             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)){
 212               bool vertical = (col == 2);
 213               int splash_x, splash_y;
 214               if (!vertical) { //check if collision happened from above
 215                 splash_x = int(particle->pos.x);
 216                 splash_y = int(particle->pos.y) - (int(particle->pos.y) % 32) + 32;
 217                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 218               }
 219               // Uncomment the following to display vertical splashes, too
 220               /* else {
 221                 splash_x = int(particle->pos.x) - (int(particle->pos.x) % 32) + 32;
 222                 splash_y = int(particle->pos.y);
 223                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 224               } */
 225             }
 226             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 227             int new_y = 0;
 228             //FIXME: Don't move particles over solid tiles
 229             particle->pos.x = new_x;
 230             particle->pos.y = new_y;
 231         }
 232     }
 233 }
 234
 235 CometParticleSystem::CometParticleSystem()
 236 {
 237     cometimages[0] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 238     cometimages[1] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 239
 240     virtual_width = SCREEN_WIDTH * 2;
 241
 242     // create some random comets
 243     size_t cometcount = 2;
 244     for(size_t i=0; i<cometcount; ++i) {
 245         CometParticle* particle = new CometParticle;
 246         particle->pos.x = systemRandom.rand(int(virtual_width));
 247         particle->pos.y = systemRandom.rand(int(virtual_height));
 248         int cometsize = systemRandom.rand(2);
 249         particle->texture = cometimages[cometsize];
 250         do {
 251             particle->speed = (cometsize+1)*30 + systemRandom.randf(3.6);
 252         } while(particle->speed < 1);
 253         particle->speed *= 10; // gravity
 254
 255         particles.push_back(particle);
 256     }
 257 }
 258
 259 void
 260 CometParticleSystem::parse(const lisp::Lisp& reader)
 261 {
 262   reader.get("z-pos", z_pos);
 263 }
 264
 265 void
 266 CometParticleSystem::write(lisp::Writer& writer)
 267 {
 268   writer.start_list("particles-comets");
 269   writer.write_int("z-pos", z_pos);
 270   writer.end_list("particles-comets");
 271 }
 272
 273 CometParticleSystem::~CometParticleSystem()
 274 {
 275   for(int i=0;i<2;++i)
 276     delete cometimages[i];
 277 }
 278
 279 void CometParticleSystem::update(float elapsed_time)
 280 {
 281   (void) elapsed_time;
 282 #if 0
 283     std::vector<Particle*>::iterator i;
 284     for(
 285         i = particles.begin(); i != particles.end(); ++i) {
 286         CometParticle* particle = (CometParticle*) *i;
 287         float movement = particle->speed * elapsed_time;
 288         float abs_x = Sector::current()->camera->get_translation().x;
 289         float abs_y = Sector::current()->camera->get_translation().y;
 290         particle->pos.y += movement;
 291         particle->pos.x -= movement;
 292         int col = collision(particle, Vector(-movement, movement));
 293         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 294             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)) {
 295               Sector::current()->add_object(new Bomb(particle->pos, LEFT));
 296             }
 297             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 298             int new_y = 0;
 299             //FIXME: Don't move particles over solid tiles
 300             particle->pos.x = new_x;
 301             particle->pos.y = new_y;
 302         }
 303     }
 304 #endif
 305 }