src/object/particlesystem_interactive.cpp

   1 //  $Id: particlesystem.cpp 2470 2005-05-11 14:49:28Z wansti $
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2004 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 #include <config.h>
  20
  21 #include <iostream>
  22 #include <cmath>
  23
  24 #include "particlesystem_interactive.hpp"
  25 #include "video/drawing_context.hpp"
  26 #include "lisp/parser.hpp"
  27 #include "lisp/lisp.hpp"
  28 #include "lisp/writer.hpp"
  29 #include "resources.hpp"
  30 #include "main.hpp"
  31
  32 #include "tile.hpp"
  33 #include "tilemap.hpp"
  34 #include "math/aatriangle.hpp"
  35 #include "collision.hpp"
  36 #include "collision_hit.hpp"
  37 #include "object/camera.hpp"
  38 #include "object/rainsplash.hpp"
  39 #include "badguy/bomb.hpp"
  40
  41 //TODO: Find a way to make rain collide with objects like bonus blocks
  42 //      Add an option to set rain strength
  43 //      Fix rain being "respawned" over solid tiles
  44 ParticleSystem_Interactive::ParticleSystem_Interactive()
  45 {
  46     virtual_width = SCREEN_WIDTH;
  47     virtual_height = SCREEN_HEIGHT;
  48     layer = LAYER_TILES;
  49 }
  50
  51 ParticleSystem_Interactive::~ParticleSystem_Interactive()
  52 {
  53     std::vector<Particle*>::iterator i;
  54     for(i = particles.begin(); i != particles.end(); ++i) {
  55         delete *i;
  56     }
  57 }
  58
  59 void ParticleSystem_Interactive::draw(DrawingContext& context)
  60 {
  61   context.push_transform();
  62
  63     std::vector<Particle*>::iterator i;
  64     for(i = particles.begin(); i != particles.end(); ++i) {
  65         Particle* particle = *i;
  66         context.draw_surface(particle->texture, particle->pos, layer);
  67     }
  68
  69     context.pop_transform();
  70 }
  71
  72 int
  73 ParticleSystem_Interactive::collision(Particle* object, Vector movement)
  74 {
  75   TileMap* solids = Sector::current()->solids;
  76   // calculate rectangle where the object will move
  77   float x1, x2;
  78   float y1, y2;
  79   x1 = object->pos.x;
  80   x2 = x1 + 32 + movement.x;
  81   y1 = object->pos.y;
  82   y2 = y1 + 32 + movement.y;
  83   bool water = false;
  84
  85   // test with all tiles in this rectangle
  86   int starttilex = int(x1-1) / 32;
  87   int starttiley = int(y1-1) / 32;
  88   int max_x = int(x2+1);
  89   int max_y = int(y2+1);
  90
  91   CollisionHit temphit, hit;
  92   Rect dest = Rect(x1, y1, x2, y2);
  93   dest.move(movement);
  94   hit.time = -1; // represents an invalid value
  95   for(int x = starttilex; x*32 < max_x; ++x) {
  96     for(int y = starttiley; y*32 < max_y; ++y) {
  97       const Tile* tile = solids->get_tile(x, y);
  98       if(!tile)
  99         continue;
 100       // skip non-solid tiles, except water
 101       if (tile->getAttributes() & Tile::WATER)
 102         water = true;
 103       if(!water && !(tile->getAttributes() & Tile::SOLID))
 104         continue;
 105
 106       if(tile->getAttributes() & Tile::SLOPE) { // slope tile
 107         AATriangle triangle;
 108         Vector p1(x*32, y*32);
 109         Vector p2((x+1)*32, (y+1)*32);
 110         triangle = AATriangle(p1, p2, tile->getData());
 111
 112         if(Collision::rectangle_aatriangle(temphit, dest, movement,
 113               triangle)) {
 114           if(temphit.time > hit.time)
 115             hit = temphit;
 116         }
 117       } else { // normal rectangular tile
 118         Rect rect(x*32, y*32, (x+1)*32, (y+1)*32);
 119         if(Collision::rectangle_rectangle(temphit, dest,
 120               movement, rect)) {
 121           if(temphit.time > hit.time)
 122             hit = temphit;
 123         }
 124       }
 125     }
 126   }
 127
 128   // did we collide at all?
 129   if(hit.time < 0) {
 130     return -1; //no collision
 131   }
 132   else {
 133     if (water)
 134       return 0; //collision with water tile - don't draw splash
 135     else {
 136       if ((hit.normal.x == 1) && (hit.normal.y == 0))
 137         return 2; //collision from right
 138       else return 1; //collision from above
 139     }
 140   }
 141 }
 142
 143 RainParticleSystem::RainParticleSystem()
 144 {
 145     rainimages[0] = new Surface("images/objects/particles/rain0.png");
 146     rainimages[1] = new Surface("images/objects/particles/rain1.png");
 147
 148     virtual_width = SCREEN_WIDTH * 2;
 149
 150     // create some random raindrops
 151     size_t raindropcount = size_t(virtual_width/6.0);
 152     for(size_t i=0; i<raindropcount; ++i) {
 153         RainParticle* particle = new RainParticle;
 154         particle->pos.x = rand() % int(virtual_width);
 155         particle->pos.y = rand() % int(virtual_height);
 156         int rainsize = rand() % 2;
 157         particle->texture = rainimages[rainsize];
 158         do {
 159             particle->speed = (rainsize+1)*45 + (float(rand()%10)*.4);
 160         } while(particle->speed < 1);
 161         particle->speed *= 10; // gravity
 162
 163         particles.push_back(particle);
 164     }
 165 }
 166
 167 void
 168 RainParticleSystem::parse(const lisp::Lisp& reader)
 169 {
 170   reader.get("layer", layer);
 171 }
 172
 173 void
 174 RainParticleSystem::write(lisp::Writer& writer)
 175 {
 176   writer.start_list("particles-rain");
 177   writer.write_int("layer", layer);
 178   writer.end_list("particles-rain");
 179 }
 180
 181 RainParticleSystem::~RainParticleSystem()
 182 {
 183   for(int i=0;i<2;++i)
 184     delete rainimages[i];
 185 }
 186
 187 void RainParticleSystem::update(float elapsed_time)
 188 {
 189     std::vector<Particle*>::iterator i;
 190     for(
 191         i = particles.begin(); i != particles.end(); ++i) {
 192         RainParticle* particle = (RainParticle*) *i;
 193         float movement = particle->speed * elapsed_time;
 194         float abs_x = Sector::current()->camera->get_translation().x;
 195         float abs_y = Sector::current()->camera->get_translation().y;
 196         particle->pos.y += movement;
 197         particle->pos.x -= movement;
 198         int col = collision(particle, Vector(-movement, movement));
 199         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 200             //Create rainsplash
 201             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)){
 202               bool vertical = (col == 2);
 203               int splash_x, splash_y;
 204               if (!vertical) { //check if collision happened from above
 205                 splash_x = int(particle->pos.x);
 206                 splash_y = int(particle->pos.y) - (int(particle->pos.y) % 32) + 32;
 207                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 208               }
 209               // Uncomment the following to display vertical splashes, too
 210               /* else {
 211                 splash_x = int(particle->pos.x) - (int(particle->pos.x) % 32) + 32;
 212                 splash_y = int(particle->pos.y);
 213                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 214               } */
 215             }
 216             int new_x = (rand() % int(virtual_width)) + int(abs_x);
 217             int new_y = 0;
 218             //FIXME: Don't move particles over solid tiles
 219             particle->pos.x = new_x;
 220             particle->pos.y = new_y;
 221         }
 222     }
 223 }
 224
 225 CometParticleSystem::CometParticleSystem()
 226 {
 227     cometimages[0] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 228     cometimages[1] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 229
 230     virtual_width = SCREEN_WIDTH * 2;
 231
 232     // create some random comets
 233     size_t cometcount = 2;
 234     for(size_t i=0; i<cometcount; ++i) {
 235         CometParticle* particle = new CometParticle;
 236         particle->pos.x = rand() % int(virtual_width);
 237         particle->pos.y = rand() % int(virtual_height);
 238         int cometsize = rand() % 2;
 239         particle->texture = cometimages[cometsize];
 240         do {
 241             particle->speed = (cometsize+1)*30 + (float(rand()%10)*.4);
 242         } while(particle->speed < 1);
 243         particle->speed *= 10; // gravity
 244
 245         particles.push_back(particle);
 246     }
 247 }
 248
 249 void
 250 CometParticleSystem::parse(const lisp::Lisp& reader)
 251 {
 252   reader.get("layer", layer);
 253 }
 254
 255 void
 256 CometParticleSystem::write(lisp::Writer& writer)
 257 {
 258   writer.start_list("particles-comets");
 259   writer.write_int("layer", layer);
 260   writer.end_list("particles-comets");
 261 }
 262
 263 CometParticleSystem::~CometParticleSystem()
 264 {
 265   for(int i=0;i<2;++i)
 266     delete cometimages[i];
 267 }
 268
 269 void CometParticleSystem::update(float elapsed_time)
 270 {
 271     std::vector<Particle*>::iterator i;
 272     for(
 273         i = particles.begin(); i != particles.end(); ++i) {
 274         CometParticle* particle = (CometParticle*) *i;
 275         float movement = particle->speed * elapsed_time;
 276         float abs_x = Sector::current()->camera->get_translation().x;
 277         float abs_y = Sector::current()->camera->get_translation().y;
 278         particle->pos.y += movement;
 279         particle->pos.x -= movement;
 280         int col = collision(particle, Vector(-movement, movement));
 281         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 282             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)) {
 283               Sector::current()->add_object(new Bomb(particle->pos, LEFT));
 284             }
 285             int new_x = (rand() % int(virtual_width)) + int(abs_x);
 286             int new_y = 0;
 287             //FIXME: Don't move particles over solid tiles
 288             particle->pos.x = new_x;
 289             particle->pos.y = new_y;
 290         }
 291     }
 292 }