[solved] Java2D Projectile System (Movement logic)

Newbie & Debugging Questions
#1

Hey JGO, I’m trying to figure out how to go about firing a projectile from my players position to the coordinates that were tagged when the fire button is pressed.
(Game is static tiles for now, no movement)

I’m not sure about how I should do this so I’m coming here asking for help as I don’t have that much experience with angles/vectors.

I think I’ll be able to figure out the collision, I just need help with the actual logic for moving at an angle :slight_smile:

When fire button is clicked:


public static void update() {

	// firing button is down
	if (leftClickDown){
		// TODO: Implement delay system.
		final int velocity = 5;
		bullets.add(new Bullet(playerX, playerY, mouseX, mouseY, velocity));
	}

	// update every bullet. (Move)
	for (Bullet b : bullets) {
		b.update();
	}
}

Bullet class:


package org.game.core.player;

public class Bullet {

	// actual position of bullet.
	private int x, y;

	// the destination of the bullet.
	private int destinationX, destinationY;

	// handles x/y velocity
	private int velocity;

	public Bullet(int x, int y, int destX, int destY, int velocity) {
		this.velocity = velocity;
		this.x = x;
		this.y = y;
		destinationX = destX;
		destinationY = destY;
	}
	
	public void update() {
		// HERE IS WHAT I NEED TO IMPLEMENT.
	}

}

Thanks for any help/feedback :slight_smile: