gravity.cpp

   1 #include "gravity.h"
   2 #include <iostream>
   3
   4 void GravityManager::subscribe(Thing* thing) {
   5         things.insert(thing);
   6 }
   7
   8 void GravityManager::addPlataform(Linha* linha) {
   9         plataforms.insert(linha);
  10 }
  11
  12 void GravityManager::update() {
  13         std::set<Thing*>::iterator it;
  14         std::set<Linha*>::iterator plat;
  15         for (it = things.begin(); it != things.end(); it++) {
  16                 if ((*it)->getSpeedY() > 0.6)
  17                         (*it)->onGround = false;
  18                 if ((*it)->getSpeedY() <= 0 && !(*it)->onGround) {
  19                         (*it)->addSpeed(0,0.1);
  20                         continue;
  21                 }
  22                 bool colisao = false;
  23                 for (plat = plataforms.begin(); !colisao && plat != plataforms.end(); plat++) {
  24                         colisao = checkGround(*it,*plat);
  25                 }
  26                 if (colisao) {
  27                         //std::cout<<"colisao"<<std::endl;
  28                         (*it)->onGround = true;
  29                         (*it)->setSpeed((*it)->getSpeedX(),-0.2);
  30                 }
  31                 else {
  32                         (*it)->addSpeed(0,0.1);
  33                 }
  34         }
  35 }
  36
  37 bool contido(double x1,double y1, double x2, double y2, Ponto &ponto) {
  38         return x1 <= ponto.x && ponto.x <= x2 && y1 <= ponto.y && ponto.y <= y2;
  39 }
  40
  41
  42 //xy1 é o canto debaixo esq, xy2 decima direito
  43 bool collisionRectLine(double x1,double y1, double x2, double y2, Linha &linha) {
  44         if (contido(x1,y1,x2,y2,linha.vertices[0]) || contido(x1,y1,x2,y2,linha.vertices[1]))
  45                 return true;
  46         double minxlinha = std::min(linha.vertices[0].x,linha.vertices[1].x);
  47         double minylinha = std::min(linha.vertices[0].y,linha.vertices[1].y);
  48         double maxxlinha = std::max(linha.vertices[0].x,linha.vertices[1].x);
  49         double maxylinha = std::max(linha.vertices[0].y,linha.vertices[1].y);
  50         //std::cout<<y1<<" "<<maxylinha<<" "<<y2<<" "<<minylinha<<" "<< x1<<" "<<maxxlinha<<" "<< x2 <<" "<<minylinha<<std::endl;
  51         if (y1 > maxylinha || y2 < minylinha || x1 > maxxlinha || x2 < minxlinha)
  52                 return false;
  53         return true;
  54 }
  55
  56
  57 bool GravityManager::checkGround(Thing* thing, Linha* plataform) {
  58         Rect baseRect = thing->getBaseRect();
  59         return collisionRectLine(baseRect.vertices[0].x,baseRect.vertices[0].y,
  60                                                          baseRect.vertices[1].x,baseRect.vertices[1].y,*plataform);
  61 }