Player wall collision sliding problem [Need Help]

Newbie & Debugging Questions
#1

Hey Everyone,

I’m having problems with my collisions. Basically when i colliding against a wall i cant slide if i press another key…For example. if i press The left arrow key and i am on the wall, if i continue to hold this key and try to press the up arrow my player wont move upwards. I hope you know what i mean. I know its probably a really easy fix but i need help.

Here is my player update method:

	public void update() {

		movePlayer();
		// Check Collision;

		int curCol = tileMap.getColTile((int) x);
		int curRow = tileMap.getRowTile((int) y);

		double xDest = x += dx;
		double yDest = y += dy;

		double tempX = x;
		double tempY = y;

		collision(x, yDest);
		if (dy < 0) {
			if (topLeft || topRight) {
				dy = 0;
				tempY = curRow * tileMap.getTileSize() + height / 2;
			} else {
				tempY += dy;
			}
		}
		if (dy > 0) {
			if (bottomLeft || bottomRight) {
				dy = 0;
				tempY = (curRow + 1) * tileMap.getTileSize() - height / 2;
			} else {
				tempY += dy;
			}
		}
		dy = 0;
		collision(xDest, y);
		if (dx < 0) {
			if (topLeft || bottomLeft) {
				dx = 0;
				tempX = curCol * tileMap.getTileSize() + width / 2;
			} else {
				tempX += dx;
			}
		}
		if (dx > 0) {
			if (topRight || bottomRight) {
				dx = 0;
				tempX = (curCol + 1) * tileMap.getTileSize() - width / 2;
			} else {
				tempX += dx;
			}
		}
		dx = 0;

		x = tempX;
		y = tempY;

		tileMap.setX((int) (Game.WIDTH * Game.SCALE / 2 - x));
		tileMap.setY((int) (Game.HEIGHT * Game.SCALE / 2 - y));
	}

	public void movePlayer() {
		if (left) {
			dx -= moveSpeed;
		}
		if (right) {
			dx += moveSpeed;
		}
		if (up) {
			dy -= moveSpeed;
		}
		if (down) {
			dy += moveSpeed;
		}
	}

I might have an idea on how to do it. i think you could use something like

if(dx != 0 && dy != 0){
//Something in here
            }

Please any help is much appreciated.
Thanks

  • GlennBrann