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   TileMap* solids = Sector::current()->solids;
  78   // calculate rectangle where the object will move
  79   float x1, x2;
  80   float y1, y2;
  81   x1 = object->pos.x;
  82   x2 = x1 + 32 + movement.x;
  83   y1 = object->pos.y;
  84   y2 = y1 + 32 + movement.y;
  85   bool water = false;
  86
  87   // test with all tiles in this rectangle
  88   int starttilex = int(x1-1) / 32;
  89   int starttiley = int(y1-1) / 32;
  90   int max_x = int(x2+1);
  91   int max_y = int(y2+1);
  92
  93   CollisionHit temphit, hit;
  94   Rect dest = Rect(x1, y1, x2, y2);
  95   dest.move(movement);
  96   hit.time = -1; // represents an invalid value
  97   for(int x = starttilex; x*32 < max_x; ++x) {
  98     for(int y = starttiley; y*32 < max_y; ++y) {
  99       const Tile* tile = solids->get_tile(x, y);
 100       if(!tile)
 101         continue;
 102       // skip non-solid tiles, except water
 103       if (tile->getAttributes() & Tile::WATER)
 104         water = true;
 105       if(!water && !(tile->getAttributes() & Tile::SOLID))
 106         continue;
 107
 108       if(tile->getAttributes() & Tile::SLOPE) { // slope tile
 109         AATriangle triangle;
 110         Vector p1(x*32, y*32);
 111         Vector p2((x+1)*32, (y+1)*32);
 112         triangle = AATriangle(p1, p2, tile->getData());
 113
 114         if(Collision::rectangle_aatriangle(temphit, dest, movement,
 115               triangle)) {
 116           if(temphit.time > hit.time)
 117             hit = temphit;
 118         }
 119       } else { // normal rectangular tile
 120         Rect rect(x*32, y*32, (x+1)*32, (y+1)*32);
 121         if(Collision::rectangle_rectangle(temphit, dest,
 122               movement, rect)) {
 123           if(temphit.time > hit.time)
 124             hit = temphit;
 125         }
 126       }
 127     }
 128   }
 129
 130   // did we collide at all?
 131   if(hit.time < 0) {
 132     return -1; //no collision
 133   }
 134   else {
 135     if (water)
 136       return 0; //collision with water tile - don't draw splash
 137     else {
 138       if ((hit.normal.x == 1) && (hit.normal.y == 0))
 139         return 2; //collision from right
 140       else return 1; //collision from above
 141     }
 142   }
 143 }
 144
 145 RainParticleSystem::RainParticleSystem()
 146 {
 147     rainimages[0] = new Surface("images/objects/particles/rain0.png");
 148     rainimages[1] = new Surface("images/objects/particles/rain1.png");
 149
 150     virtual_width = SCREEN_WIDTH * 2;
 151
 152     // create some random raindrops
 153     size_t raindropcount = size_t(virtual_width/6.0);
 154     for(size_t i=0; i<raindropcount; ++i) {
 155         RainParticle* particle = new RainParticle;
 156         particle->pos.x = systemRandom.rand(int(virtual_width));
 157         particle->pos.y = systemRandom.rand(int(virtual_height));
 158         int rainsize = systemRandom.rand(2);
 159         particle->texture = rainimages[rainsize];
 160         do {
 161             particle->speed = (rainsize+1)*45 + systemRandom.randf(3.6);
 162         } while(particle->speed < 1);
 163         particle->speed *= 10; // gravity
 164
 165         particles.push_back(particle);
 166     }
 167 }
 168
 169 void
 170 RainParticleSystem::parse(const lisp::Lisp& reader)
 171 {
 172   reader.get("z-pos", z_pos);
 173 }
 174
 175 void
 176 RainParticleSystem::write(lisp::Writer& writer)
 177 {
 178   writer.start_list("particles-rain");
 179   writer.write_int("z-pos", z_pos);
 180   writer.end_list("particles-rain");
 181 }
 182
 183 RainParticleSystem::~RainParticleSystem()
 184 {
 185   for(int i=0;i<2;++i)
 186     delete rainimages[i];
 187 }
 188
 189 void RainParticleSystem::update(float elapsed_time)
 190 {
 191     std::vector<Particle*>::iterator i;
 192     for(
 193         i = particles.begin(); i != particles.end(); ++i) {
 194         RainParticle* particle = (RainParticle*) *i;
 195         float movement = particle->speed * elapsed_time;
 196         float abs_x = Sector::current()->camera->get_translation().x;
 197         float abs_y = Sector::current()->camera->get_translation().y;
 198         particle->pos.y += movement;
 199         particle->pos.x -= movement;
 200         int col = collision(particle, Vector(-movement, movement));
 201         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 202             //Create rainsplash
 203             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)){
 204               bool vertical = (col == 2);
 205               int splash_x, splash_y;
 206               if (!vertical) { //check if collision happened from above
 207                 splash_x = int(particle->pos.x);
 208                 splash_y = int(particle->pos.y) - (int(particle->pos.y) % 32) + 32;
 209                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 210               }
 211               // Uncomment the following to display vertical splashes, too
 212               /* else {
 213                 splash_x = int(particle->pos.x) - (int(particle->pos.x) % 32) + 32;
 214                 splash_y = int(particle->pos.y);
 215                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 216               } */
 217             }
 218             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 219             int new_y = 0;
 220             //FIXME: Don't move particles over solid tiles
 221             particle->pos.x = new_x;
 222             particle->pos.y = new_y;
 223         }
 224     }
 225 }
 226
 227 CometParticleSystem::CometParticleSystem()
 228 {
 229     cometimages[0] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 230     cometimages[1] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 231
 232     virtual_width = SCREEN_WIDTH * 2;
 233
 234     // create some random comets
 235     size_t cometcount = 2;
 236     for(size_t i=0; i<cometcount; ++i) {
 237         CometParticle* particle = new CometParticle;
 238         particle->pos.x = systemRandom.rand(int(virtual_width));
 239         particle->pos.y = systemRandom.rand(int(virtual_height));
 240         int cometsize = systemRandom.rand(2);
 241         particle->texture = cometimages[cometsize];
 242         do {
 243             particle->speed = (cometsize+1)*30 + systemRandom.randf(3.6);
 244         } while(particle->speed < 1);
 245         particle->speed *= 10; // gravity
 246
 247         particles.push_back(particle);
 248     }
 249 }
 250
 251 void
 252 CometParticleSystem::parse(const lisp::Lisp& reader)
 253 {
 254   reader.get("z-pos", z_pos);
 255 }
 256
 257 void
 258 CometParticleSystem::write(lisp::Writer& writer)
 259 {
 260   writer.start_list("particles-comets");
 261   writer.write_int("z-pos", z_pos);
 262   writer.end_list("particles-comets");
 263 }
 264
 265 CometParticleSystem::~CometParticleSystem()
 266 {
 267   for(int i=0;i<2;++i)
 268     delete cometimages[i];
 269 }
 270
 271 void CometParticleSystem::update(float elapsed_time)
 272 {
 273     std::vector<Particle*>::iterator i;
 274     for(
 275         i = particles.begin(); i != particles.end(); ++i) {
 276         CometParticle* particle = (CometParticle*) *i;
 277         float movement = particle->speed * elapsed_time;
 278         float abs_x = Sector::current()->camera->get_translation().x;
 279         float abs_y = Sector::current()->camera->get_translation().y;
 280         particle->pos.y += movement;
 281         particle->pos.x -= movement;
 282         int col = collision(particle, Vector(-movement, movement));
 283         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 284             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)) {
 285               Sector::current()->add_object(new Bomb(particle->pos, LEFT));
 286             }
 287             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 288             int new_y = 0;
 289             //FIXME: Don't move particles over solid tiles
 290             particle->pos.x = new_x;
 291             particle->pos.y = new_y;
 292         }
 293     }
 294 }