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   TileMap* solids = Sector::current()->solids;
  80   // calculate rectangle where the object will move
  81   float x1, x2;
  82   float y1, y2;
  83   x1 = object->pos.x;
  84   x2 = x1 + 32 + movement.x;
  85   y1 = object->pos.y;
  86   y2 = y1 + 32 + movement.y;
  87   bool water = false;
  88
  89   // test with all tiles in this rectangle
  90   int starttilex = int(x1-1) / 32;
  91   int starttiley = int(y1-1) / 32;
  92   int max_x = int(x2+1);
  93   int max_y = int(y2+1);
  94
  95   Rect dest = Rect(x1, y1, x2, y2);
  96   dest.move(movement);
  97   Constraints constraints;
  98   for(int x = starttilex; x*32 < max_x; ++x) {
  99     for(int y = starttiley; y*32 < max_y; ++y) {
 100       const Tile* tile = solids->get_tile(x, y);
 101       if(!tile)
 102         continue;
 103       // skip non-solid tiles, except water
 104       if(! (tile->getAttributes() & (Tile::WATER | 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(rectangle_aatriangle(&constraints, dest, triangle)) {
 114           if(tile->getAttributes() & Tile::WATER)
 115             water = true;
 116         }
 117       } else { // normal rectangular tile
 118         Rect rect(x*32, y*32, (x+1)*32, (y+1)*32);
 119         if(intersects(dest, rect)) {
 120           if(tile->getAttributes() & Tile::WATER)
 121             water = true;
 122           set_rectangle_rectangle_constraints(&constraints, dest, rect);
 123         }
 124       }
 125     }
 126   }
 127
 128   // TODO don't use magic numbers here...
 129
 130   // did we collide at all?
 131   if(!constraints.has_constraints())
 132     return -1;
 133
 134   const CollisionHit& hit = constraints.hit;
 135   if (water) {
 136     return 0; //collision with water tile - don't draw splash
 137   } else {
 138     if (hit.right || hit.left) {
 139       return 2; //collision from right
 140     } else {
 141       return 1; //collision from above
 142     }
 143   }
 144
 145   return 0;
 146 }
 147
 148 RainParticleSystem::RainParticleSystem()
 149 {
 150     rainimages[0] = new Surface("images/objects/particles/rain0.png");
 151     rainimages[1] = new Surface("images/objects/particles/rain1.png");
 152
 153     virtual_width = SCREEN_WIDTH * 2;
 154
 155     // create some random raindrops
 156     size_t raindropcount = size_t(virtual_width/6.0);
 157     for(size_t i=0; i<raindropcount; ++i) {
 158         RainParticle* particle = new RainParticle;
 159         particle->pos.x = systemRandom.rand(int(virtual_width));
 160         particle->pos.y = systemRandom.rand(int(virtual_height));
 161         int rainsize = systemRandom.rand(2);
 162         particle->texture = rainimages[rainsize];
 163         do {
 164             particle->speed = (rainsize+1)*45 + systemRandom.randf(3.6);
 165         } while(particle->speed < 1);
 166         particle->speed *= 10; // gravity
 167
 168         particles.push_back(particle);
 169     }
 170 }
 171
 172 void
 173 RainParticleSystem::parse(const lisp::Lisp& reader)
 174 {
 175   reader.get("z-pos", z_pos);
 176 }
 177
 178 void
 179 RainParticleSystem::write(lisp::Writer& writer)
 180 {
 181   writer.start_list("particles-rain");
 182   writer.write_int("z-pos", z_pos);
 183   writer.end_list("particles-rain");
 184 }
 185
 186 RainParticleSystem::~RainParticleSystem()
 187 {
 188   for(int i=0;i<2;++i)
 189     delete rainimages[i];
 190 }
 191
 192 void RainParticleSystem::update(float elapsed_time)
 193 {
 194     std::vector<Particle*>::iterator i;
 195     for(
 196         i = particles.begin(); i != particles.end(); ++i) {
 197         RainParticle* particle = (RainParticle*) *i;
 198         float movement = particle->speed * elapsed_time;
 199         float abs_x = Sector::current()->camera->get_translation().x;
 200         float abs_y = Sector::current()->camera->get_translation().y;
 201         particle->pos.y += movement;
 202         particle->pos.x -= movement;
 203         int col = collision(particle, Vector(-movement, movement));
 204         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 205             //Create rainsplash
 206             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)){
 207               bool vertical = (col == 2);
 208               int splash_x, splash_y;
 209               if (!vertical) { //check if collision happened from above
 210                 splash_x = int(particle->pos.x);
 211                 splash_y = int(particle->pos.y) - (int(particle->pos.y) % 32) + 32;
 212                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 213               }
 214               // Uncomment the following to display vertical splashes, too
 215               /* else {
 216                 splash_x = int(particle->pos.x) - (int(particle->pos.x) % 32) + 32;
 217                 splash_y = int(particle->pos.y);
 218                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 219               } */
 220             }
 221             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 222             int new_y = 0;
 223             //FIXME: Don't move particles over solid tiles
 224             particle->pos.x = new_x;
 225             particle->pos.y = new_y;
 226         }
 227     }
 228 }
 229
 230 CometParticleSystem::CometParticleSystem()
 231 {
 232     cometimages[0] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 233     cometimages[1] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 234
 235     virtual_width = SCREEN_WIDTH * 2;
 236
 237     // create some random comets
 238     size_t cometcount = 2;
 239     for(size_t i=0; i<cometcount; ++i) {
 240         CometParticle* particle = new CometParticle;
 241         particle->pos.x = systemRandom.rand(int(virtual_width));
 242         particle->pos.y = systemRandom.rand(int(virtual_height));
 243         int cometsize = systemRandom.rand(2);
 244         particle->texture = cometimages[cometsize];
 245         do {
 246             particle->speed = (cometsize+1)*30 + systemRandom.randf(3.6);
 247         } while(particle->speed < 1);
 248         particle->speed *= 10; // gravity
 249
 250         particles.push_back(particle);
 251     }
 252 }
 253
 254 void
 255 CometParticleSystem::parse(const lisp::Lisp& reader)
 256 {
 257   reader.get("z-pos", z_pos);
 258 }
 259
 260 void
 261 CometParticleSystem::write(lisp::Writer& writer)
 262 {
 263   writer.start_list("particles-comets");
 264   writer.write_int("z-pos", z_pos);
 265   writer.end_list("particles-comets");
 266 }
 267
 268 CometParticleSystem::~CometParticleSystem()
 269 {
 270   for(int i=0;i<2;++i)
 271     delete cometimages[i];
 272 }
 273
 274 void CometParticleSystem::update(float elapsed_time)
 275 {
 276   (void) elapsed_time;
 277 #if 0
 278     std::vector<Particle*>::iterator i;
 279     for(
 280         i = particles.begin(); i != particles.end(); ++i) {
 281         CometParticle* particle = (CometParticle*) *i;
 282         float movement = particle->speed * elapsed_time;
 283         float abs_x = Sector::current()->camera->get_translation().x;
 284         float abs_y = Sector::current()->camera->get_translation().y;
 285         particle->pos.y += movement;
 286         particle->pos.x -= movement;
 287         int col = collision(particle, Vector(-movement, movement));
 288         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 289             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)) {
 290               Sector::current()->add_object(new Bomb(particle->pos, LEFT));
 291             }
 292             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 293             int new_y = 0;
 294             //FIXME: Don't move particles over solid tiles
 295             particle->pos.x = new_x;
 296             particle->pos.y = new_y;
 297         }
 298     }
 299 #endif
 300 }