Processing Forum

line of sight, 2D topdown tile game

[14 Replies]
- 13-Sep-2012 03:19 PM
- Forum: Programming Questions
I'm making an overhead shooter, but I'm having trouble with the 'cone of sight' of the enemy. What I want is for the enemy to only detect the player if he is in front of him (ie in his cone of sight). Here is a screenshot

and here is the code I'm having trouble with:
1. boolean PointInViewAngle(float objX, float objY, float coneX, float coneY, float coneDir, float coneAngle) {
  boolean seeMe = false; //this WILL BE returned as TRUE at the END of the funciton if the enemy can see the player
  float minAngle = coneDir - coneAngle / 2; //the minimum angle of the code (ie 1 of the red lines)
  float maxAngle = coneDir + coneAngle / 2; //the max angle of the code (ie 1 the other red line)
  
  float thisAngle = atan2(objY - coneY, objX - coneX); // objX,objY = player, coneY = of the enemy)
  //Test if the angle is inside the 'cone' (between the min angle and max angle)
  if (minAngle > maxAngle) {
  if ((thisAngle <= maxAngle) ||(thisAngle >= minAngle)) {
  seeMe = true;
  }
  }
  return seeMe;
  }
  
  void enemiesDraw() {
  
  //Draw a visual representation of the cone of sight (+16 to center it on the enemy image)
  stroke(255,0,0);
  line(x*+16,y+16,x + (cos(angle+radians(45)/2)*400)*tileSize,y + (sin(angle+radians(45) / 2)*400*tileSize));
  line(x*+16,y+16,x + (cos(angle-radians(45)/2)*400)*tileSize,y + (sin(angle-radians(45) / 2)*400*tileSize));
  
  //if the enemy can see the player, print a message.
  if (PointInViewAngle(player1.x+offsetX,player1.y+offsetY,x*tileSize+offsetX,y*tileSize+offsetY,angle,radians(45)) == true) {
  print("I can see you");
  }
Any help is widely appreciated

Scrolling tilemap

[5 Replies]
- 07-Jun-2012 07:48 AM
- Forum: Programming Questions
Hi

I'm making an overhead shooter, and although I can control the character (he moves to wherever the mouse clicks) and draw the tile map I've loaded in. I can't figure out how to move the screen with the character.

I've used the variables offsetX and offsetY to show the amount the screen has 'moved', but I can't figure out how to make this work for the tiles and following the shooter.

//Set where the player is going to move to
1. Player1.targetX = mouseX+offsetX;
  Player1.targetY = mouseY+offsetY;
THE PLAYER CLASS (NOT THE MAIN GAME draw)

//Drawing and moving the player, I don't know how I should use the offsetX and offsetY variables here
1. class player {
        float x, y, speed, angle, targetX, targetY, dx, dy, oldAngle;
        int health, gun;
  
        player(float px, float py, float pspeed, float pangle) {
              x = px;
              y = py;
              speed = pspeed;
              angle = pangle;
              health = 100;
        }
2. void draw() {
3.             pushMatrix();
              imageMode(CENTER);
              translate(x,y);
              rotate(atan2(targetY-y, targetX-x));
  
              image(imgPlayer,0,0);
4.             popMatrix();
  
        }
  
        void move() {
              if ((targetX > 0) && (targetY > 0)) {
              angle = atan2(targetY-y,targetX-x);
  
              if (dist(x,y,targetX,targetY) < 10) {
  
                 println("reached target");
5. } else {
6. y+= (sin(atan2(targetY - (y+offsetY), targetX - (x+offsetX)))*1);
7. x+= (cos(atan2(targetY - (y+offsetY), targetX - (x+offsetX)))*1);
8. }
9. }
and draw the tiles in view
1. void updateTiles() {
        for (int i = 0; i < tilesW; i++) {
              for (int j = 0; j < tilesH; j++) {
  
                    if(tiles[i][j]>0) {
                          if ((i*tileSize)< (sWidth-offsetX+tileSize) && (i*tileSize) > (0-tileSize-offsetX)) {
                                if ((j*tileSize)< (sHeight-offsetY+tileSize) && (j*tileSize) > (0-tileSize-offsetY)) {
                                      image(imgTile[tiles[i][j]],i*tileSize+offsetX,j*tileSize+offsetY);
                                }
                          }
                    }
  
              }
        }
  }
a screenshot:

Thanks for any help.

rotate and move to a point

[3 Replies]
- 03-Jun-2012 12:22 PM
- Forum: Programming Questions
Hi, I've been looking through the examples and the forums, but just can't seem to figure out to do this.

Basically, My game is an overhead perspective, where the user controls a man.

I want to man to rotate properly and move towards where the user clicks.
Earlier

In the program, the targetX variable of the object is set to mouseX and targetY = mouseY.
1. void draw() {
  
        pushMatrix();
  translate(width/2, height/2);
        rotate(angle);
        image(imgPlayer,x,y);
        popMatrix();
  }
  
  void move() {
        if ((targetX > 0) && (targetY > 0)) {
              angle = atan2(targetY - y, targetX - x);
  
              x += cos(angle)*1;
              y+= sin(angle)*1;
  }
  
  }

leadbolt android adverts

[4 Replies]
- 14-Feb-2012 12:20 PM
- Forum: Android Processing
Does anyone know how to get the leadbolt adverts to work in a processing application.

I've seen this for admob: https://forum.processing.org/topic/how-to-including-ads-to-android-project and am wondering if there is similar for leadbolt. As I prefer it.

I've got the following structure in my sketches libraries folder:
      LeadboltController
            libraries
                  LeadboltController.jar

and it shows no problems when I use:
import com.Leadbolt.*;

the leadbolt documentation says this, but is there anyway to use this in the processing ide, I've never used eclipse.
1. /*
  Other imports here
  */
  import com.Leadbolt.AdController;
  public class HelloWorld extends Activity
  {
  private AdController myController;
  public void onCreate(Bundle savedInstanceState)
  {
  super.onCreate(savedInstanceState);
  // create a new layout
  LinearLayout layout = new LinearLayout(this);
  /*
  Add any elements to your view
  */
  // make the view visible
  this.setContentView(layout);
  }
  final Activity act = this;
  // now add the banner or overlay to the app
  layout.post(new Runnable() {
  public void run() {
  myController = new AdController(act, MY_LB_SECTION_ID);
  myController.loadAd();
  }
  });
  }
  public void onDestroy()
  {
  myController.destroyAd();
  super.onDestroy();
  }
thanks in advance for any advice/help

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