MouseInput.java

package com.javamarcher.input;

import static org.lwjgl.glfw.GLFW.glfwGetCursorPos;

import java.nio.DoubleBuffer;

import org.joml.Vector2f;
import org.lwjgl.BufferUtils;
import org.lwjgl.glfw.GLFW;
import org.lwjgl.glfw.GLFWCursorPosCallback;

import com.javamarcher.window.MainWindow;

public class MouseInput extends GLFWCursorPosCallback {
	
	private final Vector2f mouseDelta = new Vector2f();

	@Override
	public void invoke(long window, double xpos, double ypos) {
		
		DoubleBuffer x = BufferUtils.createDoubleBuffer(1);
        DoubleBuffer y = BufferUtils.createDoubleBuffer(1);

        glfwGetCursorPos(window, x, y);
        x.rewind();
        y.rewind();

        mouseDelta.x = (float) (x.get() - MainWindow.WIDTH * 0.5);
        mouseDelta.y = (float) (y.get() - MainWindow.HEIGHT * 0.5);
        
		GLFW.glfwSetCursorPos(MainWindow.WINDOW, (float) (MainWindow.WIDTH * 0.5), (float) (MainWindow.HEIGHT * 0.5));
		
	}

	public Vector2f getMouseDelta() {
		return mouseDelta;
	}

}