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     for(int x = starttilex; x*32 < max_x; ++x) {
 101       for(int y = starttiley; y*32 < max_y; ++y) {
 102         const Tile* tile = solids->get_tile(x, y);
 103         if(!tile)
 104           continue;
 105         // skip non-solid tiles, except water
 106         if(! (tile->getAttributes() & (Tile::WATER | Tile::SOLID)))
 107           continue;
 108
 109         if(tile->getAttributes() & Tile::SLOPE) { // slope tile
 110           AATriangle triangle;
 111           Vector p1(x*32, y*32);
 112           Vector p2((x+1)*32, (y+1)*32);
 113           triangle = AATriangle(p1, p2, tile->getData());
 114
 115           if(rectangle_aatriangle(&constraints, dest, triangle)) {
 116             if(tile->getAttributes() & Tile::WATER)
 117               water = true;
 118           }
 119         } else { // normal rectangular tile
 120           Rect rect(x*32, y*32, (x+1)*32, (y+1)*32);
 121           if(intersects(dest, rect)) {
 122             if(tile->getAttributes() & Tile::WATER)
 123               water = true;
 124             set_rectangle_rectangle_constraints(&constraints, dest, rect);
 125           }
 126         }
 127       }
 128     }
 129   }
 130
 131
 132   // TODO don't use magic numbers here...
 133
 134   // did we collide at all?
 135   if(!constraints.has_constraints())
 136     return -1;
 137
 138   const CollisionHit& hit = constraints.hit;
 139   if (water) {
 140     return 0; //collision with water tile - don't draw splash
 141   } else {
 142     if (hit.right || hit.left) {
 143       return 2; //collision from right
 144     } else {
 145       return 1; //collision from above
 146     }
 147   }
 148
 149   return 0;
 150 }
 151
 152 RainParticleSystem::RainParticleSystem()
 153 {
 154     rainimages[0] = new Surface("images/objects/particles/rain0.png");
 155     rainimages[1] = new Surface("images/objects/particles/rain1.png");
 156
 157     virtual_width = SCREEN_WIDTH * 2;
 158
 159     // create some random raindrops
 160     size_t raindropcount = size_t(virtual_width/6.0);
 161     for(size_t i=0; i<raindropcount; ++i) {
 162         RainParticle* particle = new RainParticle;
 163         particle->pos.x = systemRandom.rand(int(virtual_width));
 164         particle->pos.y = systemRandom.rand(int(virtual_height));
 165         int rainsize = systemRandom.rand(2);
 166         particle->texture = rainimages[rainsize];
 167         do {
 168             particle->speed = (rainsize+1)*45 + systemRandom.randf(3.6);
 169         } while(particle->speed < 1);
 170         particle->speed *= 10; // gravity
 171
 172         particles.push_back(particle);
 173     }
 174 }
 175
 176 void
 177 RainParticleSystem::parse(const lisp::Lisp& reader)
 178 {
 179   reader.get("z-pos", z_pos);
 180 }
 181
 182 void
 183 RainParticleSystem::write(lisp::Writer& writer)
 184 {
 185   writer.start_list("particles-rain");
 186   writer.write_int("z-pos", z_pos);
 187   writer.end_list("particles-rain");
 188 }
 189
 190 RainParticleSystem::~RainParticleSystem()
 191 {
 192   for(int i=0;i<2;++i)
 193     delete rainimages[i];
 194 }
 195
 196 void RainParticleSystem::update(float elapsed_time)
 197 {
 198     std::vector<Particle*>::iterator i;
 199     for(
 200         i = particles.begin(); i != particles.end(); ++i) {
 201         RainParticle* particle = (RainParticle*) *i;
 202         float movement = particle->speed * elapsed_time;
 203         float abs_x = Sector::current()->camera->get_translation().x;
 204         float abs_y = Sector::current()->camera->get_translation().y;
 205         particle->pos.y += movement;
 206         particle->pos.x -= movement;
 207         int col = collision(particle, Vector(-movement, movement));
 208         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 209             //Create rainsplash
 210             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)){
 211               bool vertical = (col == 2);
 212               int splash_x, splash_y;
 213               if (!vertical) { //check if collision happened from above
 214                 splash_x = int(particle->pos.x);
 215                 splash_y = int(particle->pos.y) - (int(particle->pos.y) % 32) + 32;
 216                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 217               }
 218               // Uncomment the following to display vertical splashes, too
 219               /* else {
 220                 splash_x = int(particle->pos.x) - (int(particle->pos.x) % 32) + 32;
 221                 splash_y = int(particle->pos.y);
 222                 Sector::current()->add_object(new RainSplash(Vector(splash_x, splash_y),vertical));
 223               } */
 224             }
 225             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 226             int new_y = 0;
 227             //FIXME: Don't move particles over solid tiles
 228             particle->pos.x = new_x;
 229             particle->pos.y = new_y;
 230         }
 231     }
 232 }
 233
 234 CometParticleSystem::CometParticleSystem()
 235 {
 236     cometimages[0] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 237     cometimages[1] = new Surface("images/creatures/mr_bomb/exploding-left-0.png");
 238
 239     virtual_width = SCREEN_WIDTH * 2;
 240
 241     // create some random comets
 242     size_t cometcount = 2;
 243     for(size_t i=0; i<cometcount; ++i) {
 244         CometParticle* particle = new CometParticle;
 245         particle->pos.x = systemRandom.rand(int(virtual_width));
 246         particle->pos.y = systemRandom.rand(int(virtual_height));
 247         int cometsize = systemRandom.rand(2);
 248         particle->texture = cometimages[cometsize];
 249         do {
 250             particle->speed = (cometsize+1)*30 + systemRandom.randf(3.6);
 251         } while(particle->speed < 1);
 252         particle->speed *= 10; // gravity
 253
 254         particles.push_back(particle);
 255     }
 256 }
 257
 258 void
 259 CometParticleSystem::parse(const lisp::Lisp& reader)
 260 {
 261   reader.get("z-pos", z_pos);
 262 }
 263
 264 void
 265 CometParticleSystem::write(lisp::Writer& writer)
 266 {
 267   writer.start_list("particles-comets");
 268   writer.write_int("z-pos", z_pos);
 269   writer.end_list("particles-comets");
 270 }
 271
 272 CometParticleSystem::~CometParticleSystem()
 273 {
 274   for(int i=0;i<2;++i)
 275     delete cometimages[i];
 276 }
 277
 278 void CometParticleSystem::update(float elapsed_time)
 279 {
 280   (void) elapsed_time;
 281 #if 0
 282     std::vector<Particle*>::iterator i;
 283     for(
 284         i = particles.begin(); i != particles.end(); ++i) {
 285         CometParticle* particle = (CometParticle*) *i;
 286         float movement = particle->speed * elapsed_time;
 287         float abs_x = Sector::current()->camera->get_translation().x;
 288         float abs_y = Sector::current()->camera->get_translation().y;
 289         particle->pos.y += movement;
 290         particle->pos.x -= movement;
 291         int col = collision(particle, Vector(-movement, movement));
 292         if ((particle->pos.y > SCREEN_HEIGHT + abs_y) || (col >= 0)) {
 293             if ((particle->pos.y <= SCREEN_HEIGHT + abs_y) && (col >= 1)) {
 294               Sector::current()->add_object(new Bomb(particle->pos, LEFT));
 295             }
 296             int new_x = systemRandom.rand(int(virtual_width)) + int(abs_x);
 297             int new_y = 0;
 298             //FIXME: Don't move particles over solid tiles
 299             particle->pos.x = new_x;
 300             particle->pos.y = new_y;
 301         }
 302     }
 303 #endif
 304 }