3D First Person Frame Rate Issues

[GhostAssasin105]

Hi,

I'm currently coding a 3D game in lwjgl 2, and have a problem with my frame rate. I have a key based system of moving the camera, and a mouse based system of looking around, each contained in separate methods. Whenever I move the camera, the game runs at 60fps, however, when I move the mouse to look around, the frame rate drops until I stop moving the mouse.

The look around code:

public void moveMouse(Camera cam) {
		int dx = Mouse.getDX();
	    int dy = Mouse.getDY();
	    
		if(inMenu == false) {
			Mouse.setGrabbed(true);
		    cam.yaw(dx * 0.05f);
		    cam.pitch(dy * -0.05f);
		} else {
			Mouse.setGrabbed(false);
		}
	}

and the player movement code:

if (Keyboard.isKeyDown(Keyboard.KEY_W))
	        {
	            camera.walkForward(movementSpeed*dt);
	        }
	        if (Keyboard.isKeyDown(Keyboard.KEY_S))
	        {
	            camera.walkBackwards(movementSpeed*dt);
	        }
	        if (Keyboard.isKeyDown(Keyboard.KEY_A))
	        {
	            camera.strafeLeft(movementSpeed*dt);
	        }
	        if (Keyboard.isKeyDown(Keyboard.KEY_D))
	        {
	            camera.strafeRight(movementSpeed*dt);
	        }
	        if (Keyboard.isKeyDown(Keyboard.KEY_E))
	        {
	        	 camera.rollLeft(0.5f*dt);
	        }

*I'm trying to reveal as little code as possible as I plan to market this game in the near future.

Hope I provided enough evidence. Thanks in advance!

[KaiHH]

It's probably not a good idea to call Mouse.setGrabbed(true) in your game everytime you move the mouse.

[GhostAssasin105]

It's probably not a good idea to call Mouse.setGrabbed(true) in your game everytime you move the mouse.

Thanks, this helped, but still dropping frames whenever the mouse is moved.

[KaiHH]

So, how does your moveMouse() method look like now? And have you tried a profiler? You can get fully-functional evaluation versions of good Java profiling tools to see where moveMouse() is spending most of its time.

[GhostAssasin105]

public void moveMouse(Camera cam) {
		int dx = Mouse.getDX();
	    int dy = Mouse.getDY();
	    
		if(inMenu == false) {
		    cam.yaw(dx * 0.05f);
		    cam.pitch(dy * -0.05f);
		} else {
			Mouse.setGrabbed(false);
		}
	}

I simply removed the Mouse.setGrabbed(true); function, and added it into another method.