Call paint method in the game fps tick in java

Question

How do i call for my paint method to draw everything inside it withing my thick method that runs 60 times per second.

this is the fps calculation :

int FRAMES_PER_SECOND = 60;
    long maxWorkingTimePerFrame = 1000 / FRAMES_PER_SECOND;  //this is optional
    long lastStartTime = System.currentTimeMillis();

    while(true)
    {
        lastStartTime = System.currentTimeMillis();

            Tick();

        long processingTimeForCurrentFrame = System.currentTimeMillis() - lastStartTime;
        if(processingTimeForCurrentFrame  < maxWorkingTimePerFrame)
        {
            try
            {
                Thread.sleep(maxWorkingTimePerFrame - processingTimeForCurrentFrame);
            }
            catch(Exception e)
            {
                System.err.println("TSEngine :: run :: " + e);
            }
        }
    }

so how do i call :

public void paint( Graphics g ) {

}

in my Tick method?

you mean like replace the paint method and use : public static void Tick(Graphics g){} instead? — Niels Peeren, Jun 13 '14 at 13:17

score 3 · Accepted Answer · answered Jun 13 '14 at 13:16

3

To call the paint() method in your Tick method, you need to call the repaint() method. In your loop, just add repaint() when you want your component to call the paint method that you wrote.

Read this article, as it explains a little bit how painting and repainting work. http://www.scs.ryerson.ca/~mes/courses/cps530/programs/threads/Repaint/index.html.

Here is an article demonstrating how to call repaint. http://www.scs.ryerson.ca/~mes/courses/cps530/programs/threads/Repaint/RepaintApplet3.java

answered Jun 13 '14 at 13:16

jluckin

662
4
6

i tried this but all it gives me now is a empty white screen and i am unable to close the program – Niels Peeren Jun 13 '14 at 13:22
but it has to be infitie in order for it to be an fps loop right? – Niels Peeren Jun 13 '14 at 13:26
Create a thread that calls a method 60 times a second. In that method, put repaint(). – jluckin Jun 13 '14 at 13:34

Call paint method in the game fps tick in java

1 Answers1