Camera.java :  » GWT » gwtgl » com » googlecode » gwtgl » example » client » examples » skybox » Java Open Source

package com.googlecode.gwtgl.example.client.examples.skybox;

import com.google.gwt.event.dom.client.MouseDownEvent;
import com.google.gwt.event.dom.client.MouseDownHandler;
import com.google.gwt.event.dom.client.MouseMoveEvent;
import com.google.gwt.event.dom.client.MouseMoveHandler;
import com.google.gwt.event.dom.client.MouseUpEvent;
import com.google.gwt.event.dom.client.MouseUpHandler;

/**
 * Simple camera class that can consume mouse events and provides camera rotation data.
 * @author Snke Sothmann
 */
public class Camera implements MouseMoveHandler, MouseDownHandler, MouseUpHandler {

  int oldMouseX = 0;
  int oldMouseY = 0;
  boolean mouseDown = false;
  private int angleX;
  private int angleY;
  
  /**
   * Get camera rotation on x axis
   * @return rotation on x axis
   */
  public int getRotationXAxis() {
    return angleX;
  }

  /**
   * Get camera rotation on y axis
   * @return rotation on y axis
   */
  public int getRotationYAxis() {
    return angleY;
  }

  @Override
  public void onMouseMove(MouseMoveEvent event) {
    int mouseMoveX = event.getX()-oldMouseX;
    int mouseMoveY = event.getY()-oldMouseY;
    oldMouseX = event.getX();
    oldMouseY = event.getY();
    if(mouseDown){
      angleX += (mouseMoveY/10f) % 360;
      angleY += (mouseMoveX/10f) % 360;
    }
    
  }

  @Override
  public void onMouseDown(MouseDownEvent event) {
    mouseDown = true;
    
  }

  @Override
  public void onMouseUp(MouseUpEvent event) {
    mouseDown = false;
  }
}