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
  42 //TODO: Find a way to make rain collide with objects like bonus blocks
  43 //      Add an option to set rain strength
  44 //      Fix rain being "respawned" over solid tiles
  45 ParticleSystem_Interactive::ParticleSystem_Interactive()
  46 {
  47     virtual_width = SCREEN_WIDTH;
  48     virtual_height = SCREEN_HEIGHT;
  49     layer = LAYER_TILES;
  50 }
  51
  52 ParticleSystem_Interactive::~ParticleSystem_Interactive()
  53 {
  54     std::vector<Particle*>::iterator i;
  55     for(i = particles.begin(); i != particles.end(); ++i) {
  56         delete *i;
  57     }
  58 }
  59
  60 void ParticleSystem_Interactive::draw(DrawingContext& context)
  61 {
  62   context.push_transform();
  63
  64     std::vector<Particle*>::iterator i;
  65     for(i = particles.begin(); i != particles.end(); ++i) {
  66         Particle* particle = *i;
  67         context.draw_surface(particle->texture, particle->pos, layer);
  68     }
  69
  70     context.pop_transform();
  71 }
  72
  73 int
  74 ParticleSystem_Interactive::collision(Particle* object, Vector movement)
  75 {
  76   TileMap* solids = Sector::current()->solids;
  77   // calculate rectangle where the object will move
  78   float x1, x2;
  79   float y1, y2;
  80   x1 = object->pos.x;
  81   x2 = x1 + 32 + movement.x;
  82   y1 = object->pos.y;
  83   y2 = y1 + 32 + movement.y;
  84   bool water = false;
  85
  86   // test with all tiles in this rectangle
  87   int starttilex = int(x1-1) / 32;
  88   int starttiley = int(y1-1) / 32;
  89   int max_x = int(x2+1);
  90   int max_y = int(y2+1);
  91
  92   CollisionHit temphit, hit;
  93   Rect dest = Rect(x1, y1, x2, y2);
  94   dest.move(movement);
  95   hit.time = -1; // represents an invalid value
  96   for(int x = starttilex; x*32 < max_x; ++x) {
  97     for(int y = starttiley; y*32 < max_y; ++y) {
  98       const Tile* tile = solids->get_tile(x, y);
  99       if(!tile)
 100         continue;
 101       // skip non-solid tiles, except water
 102       if (tile->getAttributes() & Tile::WATER)
 103         water = true;
 104       if(!water && !(tile->getAttributes() & Tile::SOLID))
 105         continue;
 106
 107       if(tile->getAttributes() & Tile::SLOPE) { // slope tile
 108         AATriangle triangle;
 109         Vector p1(x*32, y*32);
 110         Vector p2((x+1)*32, (y+1)*32);
 111         triangle = AATriangle(p1, p2, tile->getData());
 112
 113         if(Collision::rectangle_aatriangle(temphit, dest, movement,
 114               triangle)) {
 115           if(temphit.time > hit.time)
 116             hit = temphit;
 117         }
 118       } else { // normal rectangular tile
 119         Rect rect(x*32, y*32, (x+1)*32, (y+1)*32);
 120         if(Collision::rectangle_rectangle(temphit, dest,
 121               movement, rect)) {
 122           if(temphit.time > hit.time)
 123             hit = temphit;
 124         }
 125       }
 126     }
 127   }
 128
 129   // did we collide at all?
 130   if(hit.time < 0) {
 131     return -1; //no collision
 132   }
 133   else {
 134     if (water)
 135       return 0; //collision with water tile - don't draw splash
 136     else {
 137       if ((hit.normal.x == 1) && (hit.normal.y == 0))
 138         return 2; //collision from right
 139       else return 1; //collision from above
 140     }
 141   }
 142 }
 143
 144 RainParticleSystem::RainParticleSystem()
 145 {
 146     rainimages[0] = new Surface("images/objects/particles/rain0.png");
 147     rainimages[1] = new Surface("images/objects/particles/rain1.png");
 148
 149     virtual_width = SCREEN_WIDTH * 2;
 150
 151     // create some random raindrops
 152     size_t raindropcount = size_t(virtual_width/6.0);
 153     for(size_t i=0; i<raindropcount; ++i) {
 154         RainParticle* particle = new RainParticle;
 155         particle->pos.x = rand() % int(virtual_width);
 156         particle->pos.y = rand() % int(virtual_height);
 157         int rainsize = rand() % 2;
 158         particle->texture = rainimages[rainsize];
 159         do {
 160             particle->speed = (rainsize+1)*45 + (float(rand()%10)*.4);
 161         } while(particle->speed < 1);
 162         particle->speed *= 10; // gravity
 163
 164         particles.push_back(particle);
 165     }
 166 }
 167
 168 void
 169 RainParticleSystem::parse(const lisp::Lisp& reader)
 170 {
 171   reader.get("layer", layer);
 172 }
 173
 174 void
 175 RainParticleSystem::write(lisp::Writer& writer)
 176 {
 177   writer.start_list("particles-rain");
 178   writer.write_int("layer", layer);
 179   writer.end_list("particles-rain");
 180 }
 181
 182 RainParticleSystem::~RainParticleSystem()
 183 {
 184   for(int i=0;i<2;++i)
 185     delete rainimages[i];
 186 }
 187
 188 void RainParticleSystem::update(float elapsed_time)
 189 {
 190     std::vector<Particle*>::iterator i;
 191     for(
 192         i = particles.begin(); i != particles.end(); ++i) {
 193         RainParticle* particle = (RainParticle*) *i;
 194         float movement = particle->speed * elapsed_time;
 195         float abs_x = Sector::current()->camera->get_translation().x;
 196         float abs_y = Sector::current()->camera->get_translation().y;
 197         particle->pos.y += movement;
 198         particle->pos.x -= movement;
 199         int col = collision(particle, Vector(-movement, movement));
 200         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 201             //Create rainsplash
 202             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)){
 203               bool vertical = (col == 2);
 204               int splash_x, splash_y;
 205               if (!vertical) { //check if collision happened from above
 206                 splash_x = int(particle->pos.x);
 207                 splash_y = int(particle->pos.y) - (int(particle->pos.y) % 32) + 32;
 208                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 209               }
 210               // Uncomment the following to display vertical splashes, too
 211               /* else {
 212                 splash_x = int(particle->pos.x) - (int(particle->pos.x) % 32) + 32;
 213                 splash_y = int(particle->pos.y);
 214                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 215               } */
 216             }
 217             int new_x = (rand() % int(virtual_width)) + int(abs_x);
 218             int new_y = 0;
 219             //FIXME: Don't move particles over solid tiles
 220             particle->pos.x = new_x;
 221             particle->pos.y = new_y;
 222         }
 223     }
 224 }
 225
 226 CometParticleSystem::CometParticleSystem()
 227 {
 228     cometimages[0] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 229     cometimages[1] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 230
 231     virtual_width = SCREEN_WIDTH * 2;
 232
 233     // create some random comets
 234     size_t cometcount = 2;
 235     for(size_t i=0; i<cometcount; ++i) {
 236         CometParticle* particle = new CometParticle;
 237         particle->pos.x = rand() % int(virtual_width);
 238         particle->pos.y = rand() % int(virtual_height);
 239         int cometsize = rand() % 2;
 240         particle->texture = cometimages[cometsize];
 241         do {
 242             particle->speed = (cometsize+1)*30 + (float(rand()%10)*.4);
 243         } while(particle->speed < 1);
 244         particle->speed *= 10; // gravity
 245
 246         particles.push_back(particle);
 247     }
 248 }
 249
 250 void
 251 CometParticleSystem::parse(const lisp::Lisp& reader)
 252 {
 253   reader.get("layer", layer);
 254 }
 255
 256 void
 257 CometParticleSystem::write(lisp::Writer& writer)
 258 {
 259   writer.start_list("particles-comets");
 260   writer.write_int("layer", layer);
 261   writer.end_list("particles-comets");
 262 }
 263
 264 CometParticleSystem::~CometParticleSystem()
 265 {
 266   for(int i=0;i<2;++i)
 267     delete cometimages[i];
 268 }
 269
 270 void CometParticleSystem::update(float elapsed_time)
 271 {
 272     std::vector<Particle*>::iterator i;
 273     for(
 274         i = particles.begin(); i != particles.end(); ++i) {
 275         CometParticle* particle = (CometParticle*) *i;
 276         float movement = particle->speed * elapsed_time;
 277         float abs_x = Sector::current()->camera->get_translation().x;
 278         float abs_y = Sector::current()->camera->get_translation().y;
 279         particle->pos.y += movement;
 280         particle->pos.x -= movement;
 281         int col = collision(particle, Vector(-movement, movement));
 282         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 283             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)) {
 284               Sector::current()->add_object(new Bomb(particle->pos, LEFT));
 285             }
 286             int new_x = (rand() % int(virtual_width)) + int(abs_x);
 287             int new_y = 0;
 288             //FIXME: Don't move particles over solid tiles
 289             particle->pos.x = new_x;
 290             particle->pos.y = new_y;
 291         }
 292     }
 293 }