Java ME Drawing multiple dynamic Sprites on GameCanvas

Question

I want to draw on GameCanvas multiple dynamic Sprites such as gun shots.

I have 2 main classes: GameCanvas and GameController

GameController holds a Vector of my gun shots.

GameCanvas has an access to GameController's Vector of Sprite and it also has a render() method which draws Sprites on screen.

private void render() {
            Graphics g = getGraphics();

            layerManager.setViewWindow(0, 0, getWidth(), getHeight());
            layerManager.paint(g, 0, 0);

            flushGraphics();
}

LayerManager holds all the Sprites I want to draw.

How can I draw all objects in GameController's Vector on screen?

If layerManager is already holding all the other Sprites you want to draw, then why aren't you also adding each gunshot to layerManager when the player fires? — mr_lou, Mar 13 '13 at 06:19
So I have to hold a reference to GameCanvas in GameController, right? isn't it a little bit messy? — jkigel, Mar 13 '13 at 06:25

score 0 · Accepted Answer · answered Mar 13 '13 at 08:29

I'd think it could be done like this:

Graphics g = getGraphics(); // No need to get this each time you render. Get it once outside the render function

private void render() {

  layerManager.setViewWindow(0, 0, getWidth(), getHeight());
  layerManager.paint(g, 0, 0);

  // Loop through the vector
  for (Enumeration en = gunshotVector.elements(); en.hasMoreElements();) {
    ((Sprite)en).paint(g);
  }

  flushGraphics();
}

Java ME Drawing multiple dynamic Sprites on GameCanvas

1 Answers1