camera Class sphere problem

package cubeTest;

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

public class Camera {

    public Vector3f pos = new Vector3f(50, 50, -50);
    public float pitch, yaw, roll;
    private float speed = 0.3f;

    private final float MAX_UP = 85;
    private final float MAX_DOWN = -85;
    private float RANGE = 10;

    private boolean m;

    public void tick() {
        if (Keyboard.isKeyDown(Keyboard.KEY_F))
            Mouse.setGrabbed(false);

        if (Mouse.isGrabbed()) {
            float dx = Mouse.getDX() * 0.1f * 2;
            float dy = Mouse.getDY() * 0.1f * 2;

            pitch -= dy;
//          if(pitch < 0) pitch = 360;
//          if(pitch > 360) pitch = 360;

            yaw += dx;

            if (pitch >= MAX_UP)
                pitch = MAX_UP;
            if (pitch <= MAX_DOWN)
                pitch = MAX_DOWN;

            // toggle block spawn
            if (Mouse.isButtonDown(0) && m) {
                m = false;
                // x,y,z range
                float xr = RANGE * (float) Math.sin(Math.toRadians(-yaw));
                float zr = RANGE * (float) Math.cos(Math.toRadians(-yaw));
                float yr = RANGE * (float) Math.tan(Math.toRadians(pitch));

//              float xr = (float) (RANGE * Math.cos(Math.toRadians(yaw)) * Math.sin(pitch));
//              float yr = (float) (RANGE * Math.sin(Math.toRadians(yaw)) * Math.sin(pitch));
//              float zr = (float) (RANGE * Math.cos(pitch));

                CubeGame.addCube(new Vector3f(pos.x - xr, pos.y - yr, pos.z
                        - zr), 1);
                System.out.println("");
                 System.out.println("pitch: " + pitch);
                System.out.println("y-range: " + yr);
                System.out.println("z-range: " + zr);
                System.out.println("x-range: " + xr);
            } else if (!Mouse.isButtonDown(0)) {
            }
            m = true;

            if (Keyboard.isKeyDown(Keyboard.KEY_W)) {
                pos.x += speed * (float) Math.sin(Math.toRadians(yaw));
                pos.z -= speed * (float) Math.cos(Math.toRadians(yaw));
            }
            if (Keyboard.isKeyDown(Keyboard.KEY_S)) {
                pos.x -= speed * (float) Math.sin(Math.toRadians(yaw));
                pos.z += speed * (float) Math.cos(Math.toRadians(yaw));
            }
            if (Keyboard.isKeyDown(Keyboard.KEY_A)) {
                pos.x += speed * (float) Math.sin(Math.toRadians(yaw - 90));
                pos.z -= speed * (float) Math.cos(Math.toRadians(yaw - 90));
            }
            if (Keyboard.isKeyDown(Keyboard.KEY_D)) {
                pos.x += speed * (float) Math.sin(Math.toRadians(yaw + 90));
                pos.z -= speed * (float) Math.cos(Math.toRadians(yaw + 90));
            }
            if (Keyboard.isKeyDown(Keyboard.KEY_SPACE)) {
                pos.y += speed;
            }
            if (Keyboard.isKeyDown(Keyboard.KEY_LSHIFT)) {
                pos.y -= speed;
            }
        } else if (Mouse.isButtonDown(0)) {
            Mouse.setGrabbed(true);
        }
    }

    public Vector3f getPos() {
        return pos;
    }

    public float getPitch() {
        return pitch;
    }

    public float getYaw() {
        return yaw;
    }

    public float getRoll() {
        return roll;
    }

}