Making a targeting system in Java

0
votes

This is a "tower defense" game. I have a class called soldier.

    if(wave1==true){
        for(int i=0;i<(wave*10);i++){
            handler.addObject(new soldier(getX(), getY(), ID.soldier, handler));
            try {
            //  System.out.println(i);
                Thread.sleep(500);

            } catch (InterruptedException e) {

            }

        }
        wave++;
        wave1=false;
        try {
        //  System.out.println(i);
            Thread.sleep(WT);

        } catch (InterruptedException e) {

        }
        }

Every time this code is called is the soldier gets spawned 10 times for every wave, but I have one issue. I would like the tower 1 to kill the furthest soldier in range. The code for the killing:

    private void collision() {
    for(int i=0; i< Handler.object.size();i++){
        GameObject tempObject = Handler.object.get(i);
        if(tempObject.getID()== ID.ST1){
            if(getBounds().intersects(tempObject.getBounds())){         
                Hsol=(Hsol-1);

                if(Hsol<=0){
                    handler.removeObject(this);

                }
            }               
        }
        }
    }

So I know I need to do a distance formula to find which ones closer, but I'm not sure how to do that.

2
javaeclipse
Please clarify, You want two things. 1.that soldier 1 will not get killed. 2. That the tower will 1st kill the farthest soldier in range. Is this correct? – SteelToe
I didn't read further than if(wave1=true). You probably want if (wave1 == true), or much better: if (wave1). I would also try to choose much better names: having a boolean wave1 and an integer wave is quite confusing. WT, Hsol, ID don't respect naming conventions, don't mean anything, and make your code very hard to read, even for you. – JB Nizet
@JBNizet i have the spawning system id like. i just need help getting the targeting system for the tower to work correctly. – The Gaming Koala
@MarrieteCowby12 sorry i didnt catch that mistake while typing this. but the answer to your qustion is. i would like the tower to kill the furthest soldier in range – The Gaming Koala
explain why it wouldnt work please – SteelToe

2 Answers

1
votes

Given two points (x1, y1) and (x2, y2), the distance formula is

√[(x1-x2)^2 + (y1-y2)^2]

So, using that formula, you can loop through each soldier and see which one is closest to the point that the attack is coming from.

0
votes
private void collision() {
    for(int i=0; i< Handler.object.size();i++){
        GameObject tempObject = Handler.object.get(i);
        if(tempObject.getID()== ID.ST1){
        if(this==handler.object.get(3)){
            if(getBounds().intersects(tempObject.getBounds())){ 
                Hsol=(Hsol-1);

                if(Hsol<=0){
                    handler.removeObject(this);
                    HUD.coin=(HUD.coin+100);
                    instances=(instances-1);

                    //System.out.println(HUD.coin);
                }
            }


                }
            }               
        }
        }