Camera-class

package base;

import org.lwjgl.input.Keyboard;
import org.lwjgl.util.vector.Matrix4f;
import org.lwjgl.util.vector.Vector3f;

import base.*;

public class Camera {
    Vector3f xAxis, yAxis, zAxis, newPos, currPos;
    float moveSpeed = 0.1f;
    boolean moveForw, moveBack, moveLeft, moveRight;

    public Camera(Vector3f position, Vector3f target, Vector3f up){
        Matrices.viewMatrix = new Matrix4f();
        Matrix4f.setIdentity(Matrices.viewMatrix);

        //Initialize all vectors
        this.xAxis = new Vector3f();
        this.yAxis = new Vector3f();
        this.zAxis = new Vector3f();
        this.newPos = new Vector3f();
        this.currPos = new Vector3f();

        //Set all values to the Camera-class values
        position.negate(this.currPos);
        target.normalise(this.zAxis);
        up.normalise(this.yAxis);

        Vector3f.cross(target, up, xAxis);
        Vector3f.cross(xAxis, target, yAxis); //Recalulate yAxis to make it valid coordinate system.

        /*
         * This defines the View Matrix. This is calculated and explained here:
         * http://ogldev.atspace.co.uk/www/tutorial13/tutorial13.html
         *
         * m(Column)(Row)
         */
        Matrices.viewMatrix.m00 = xAxis.x; Matrices.viewMatrix.m10 = xAxis.y; Matrices.viewMatrix.m20 = xAxis.z;
        Matrices.viewMatrix.m01 = yAxis.x; Matrices.viewMatrix.m11 = yAxis.y; Matrices.viewMatrix.m21 = yAxis.z;
        Matrices.viewMatrix.m02 = zAxis.x; Matrices.viewMatrix.m12 = zAxis.y; Matrices.viewMatrix.m22 = zAxis.z;
        Matrices.viewMatrix.m33 = 1;

        Matrices.viewMatrix.translate(this.currPos);
    }

    public void cameraLogic(){
        Vector3f.add(this.currPos, this.newPos, this.currPos); //Update current position
        System.out.println(this.currPos);
        this.newPos.set(0, 0, 0);

        //Move Forward
        moveForw = (Keyboard.isKeyDown(Keyboard.KEY_W) ? true : false);

        //Move Left
        moveLeft = (Keyboard.isKeyDown(Keyboard.KEY_A) ? true : false);

        //Move Back
        moveBack = (Keyboard.isKeyDown(Keyboard.KEY_S) ? true : false);

        //Move Left
        moveRight = (Keyboard.isKeyDown(Keyboard.KEY_D) ? true : false);

        if(moveForw){
            zAxis.normalise();
            zAxis.scale(this.moveSpeed);
            Vector3f.sub(this.newPos, this.zAxis, this.newPos);
        }
        if(moveLeft){
            xAxis.normalise();
            xAxis.scale(this.moveSpeed);
            Vector3f.add(this.newPos, this.xAxis, this.newPos);
        }
        if(moveBack){
            zAxis.normalise();
            zAxis.scale(this.moveSpeed);
            Vector3f.add(this.zAxis, this.newPos, this.newPos);
        }
        if(moveRight){
            xAxis.normalise();
            xAxis.scale(this.moveSpeed);
            Vector3f.sub(this.newPos, this.xAxis, this.newPos);
        }

        if(moveForw || moveLeft || moveBack || moveRight)
            Matrices.viewMatrix.translate(this.newPos);
    }
}