Collision detection with walls and objects

[Chrisir]

here is my version

• you can edit the map under the image (with the mouse) and save and load (s and l)

• and hide / show grid with q

• mover player with cursor

// https://discourse.processing.org/t/collision-detection-with-walls-and-objects/25856

Player player;

PImage level0; 

int [][] myMap;
boolean showMap=true; 

// mouse hold to edit grid
boolean hold; 

void setup() {
  size(900, 900); 
  level0 = loadImage("Capture.jpg");

  println(level0.width) ;
  println(level0.height) ;

  // init myMap  
  myMap = new int [level0.width/10+1][level0.height/10];
  for (int x = 0; x < myMap.length; x++) {
    for (int y = 0; y < myMap[0].length; y++) {
      myMap[x][y]=0;
    }
  }
  println(myMap.length);
  println(myMap[0].length);

  player = new Player(300, 300);
} 

void draw() {
  background(0); 

  image(level0, 
    0, 0);

  if (showMap) {
    for (int x = 0; x < myMap.length; x++) {
      for (int y = 0; y < myMap[0].length; y++) {
        fill(255); 
        text( myMap[x][y], x*10, y*10+13);
        if (hold) {
          if (mouseX>= x*10 &&
            mouseX<= (x+1)*10 &&
            mouseY>= (y-1)*10+13 &&
            mouseY<= (y)*10+13) {
            if (keyPressed)
              myMap[x][y]=0;
            else
              myMap[x][y]=1;
          }
        }
      }
    }
  }

  player.draw();
  player.update();

  String help="Help for Game\n\nThe walls are 1, ways are 0  \nl - load \ns - save\nq - show grid on /off\nMouse to set grid to 1 (save when you are ready!)\n         click mouse plus hold key gives 0 \nplay player with cursor keys ";
  fill(255);
  text(help, 
    level0.width+110, 44);
}

//-------------------------------------------------------------------------------

void keyPressed() {
  switch(key) {

  case's':
    //save
    String[] s1 = new String [myMap[0].length];

    int i=0; 
    // empty s1
    for (String dummyString : s1) { 
      s1[i]="";
      i++;
    }

    // make s1 from myMap
    for (int y = 0; y < myMap[0].length; y++) {
      for (int x = 0; x < myMap.length; x++) {
        s1[ y ] +=  myMap[x][y];
      }
    }  
    saveStrings( "level0.txt", s1);
    println("Saved");
    break;

  case 'l':
    //load
    // empty myMap
    for (int x = 0; x < myMap.length; x++) {
      for (int y = 0; y < myMap[0].length; y++) {
        myMap[x][y]=0;
      }
    }

    String[] sLoad = loadStrings( "level0.txt" ); 
    // printArray(sLoad); 
    // fill myMap
    for (int y = 0; y < myMap[0].length; y++) {
      for (int x = 0; x < sLoad[y].length(); x++) {
        myMap[x][y] = int( sLoad[y].charAt(x)+"" );
      }
    }  
    break;

  case 'q':
    //toggle
    showMap=
      ! showMap; 
    break;
  }//switch
  //
}

void mousePressed() {
  hold=true;
}

void mouseReleased() {
  hold=false;
}

// ============================================================

class Player {
  float x, y;
  boolean collide;
  color col = color(255);

  Player(float x, float y) {
    this.x = x;
    this.y = y;
  }

  void draw() {
    fill(255, 0, 0);
    rect(x, y, 20, 40);
  }

  void update() {

    int posInMyMapX=int(x/10); 
    int posInMyMapY=int(y/10);
    fill(255, 0, 0); // RED  
    // myMap[posInMyMapX][posInMyMapY]=9;
    text( myMap[posInMyMapX][posInMyMapY], 
      x*10, y*10+13);

    if (keyPressed&&keyCode==LEFT) {
      posInMyMapX=int((x-5)/10); 
      posInMyMapY=int(y/10);
      if (myMap[posInMyMapX][posInMyMapY] == 0)
        x-=5;
    }
    if (keyPressed&&keyCode==RIGHT) {
      posInMyMapX=int((x+5)/10); 
      posInMyMapY=int(y/10);
      if (myMap[posInMyMapX][posInMyMapY] == 0)
        x+=5;
    }

    if (keyPressed&&keyCode==UP) {
      posInMyMapX=int((x)/10); 
      posInMyMapY=int((y-5)/10);
      if (myMap[posInMyMapX][posInMyMapY] == 0)
        y-=5;
    }
    if (keyPressed&&keyCode==DOWN) {
      posInMyMapX=int((x)/10); 
      posInMyMapY=int((y+5)/10);
      if (myMap[posInMyMapX][posInMyMapY] == 0)
        y+=5;
    }
  }//method
  //
}//class
//

---

here is the level

111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111
100000000000000000000010000000000000000000000000111
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100111111111111111111110000000000000000000000000011
100111111111111111111110000000000000000000000000011
100111111111111111111110000000000000000000000001111
100111111111111111111110000000000000000000001111011
100111111111111111111110000000000000000000011111111
100111111111111111111110000000000000000000011111111
100000000000000000000000000000000000000000011110011
100000000000000000000000000000000000000000011110011
100000000000000000000000000000000000000000111000011
100111111111111111111110000000000000000000000000001
100111111111111111111110000000000000000000000000001
100111111111111111111110000000000000000000000000001
100111111111111111111110000000000000000000000000001
100111111111111111111110000000000000000000000000001
100111111111111111111110000000000000000000000000001
100000000000000000000010000000000000000000000000001
100000000000000000000010000000000000000000000000001
100000000000000000000010000000000000000000011111001
100000000000000000000010000000000000000000011111001
100000000000000000000010000000000000000000000000001
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
100000000000000000000010000000000000000000000000011
111111111111111111111111111111000000000000000000011
111111111111111111111111111111111111111111111111111

Chrisir