Camera.java

package phigold.rendering;

import org.joml.Matrix4f;
import org.joml.Vector3f;

public class Camera {

    private static final Vector3f UP_VECTOR = new Vector3f(0, 1, 0);

    protected Matrix4f viewMatrix = new Matrix4f();
    protected Matrix4f projectionMatrix = new Matrix4f();

    protected Vector3f position = new Vector3f();
    protected Vector3f rotation = new Vector3f(0, 90, 0);
    protected Vector3f direction = new Vector3f();
    protected Vector3f target = new Vector3f();

    protected float nearPlane = 0.01f;
    protected float farPlane = 1000f;
    protected float fov = 60;

    public void update() {
        double pitch = Math.toRadians(rotation.x);
        double yaw = Math.toRadians(rotation.y);

        direction.x = (float) (Math.cos(pitch) * Math.sin(yaw));
        direction.y = (float) (Math.sin(pitch));
        direction.z = (float) (Math.cos(pitch) * Math.cos(yaw));

        viewMatrix.setLookAt(position, position.add(direction, target), UP_VECTOR);
        projectionMatrix.setPerspective((float)Math.toRadians(fov), 800f / 600f, nearPlane, farPlane);
    }

    public Matrix4f getViewMatrix() {
        return viewMatrix;
    }

    public Matrix4f getProjectionMatrix() {
        return projectionMatrix;
    }

    public Vector3f getPosition() {
        return position;
    }

    public Vector3f getRotation() {
        return rotation;
    }

}