Question

我正在使用Swing创建组件的UI和GLCanvas（com.jogamp.opengl.awt.GLCanvas）来创建我的窗口。

问题是下一个问题。

在初始状态下，一切正常，但是当我拖动窗口调整大小时，包含我的GLCanvas的JPanel开始闪烁/闪烁。

阅读其他主题，我试试旗帜 System.setProperty（＆＃34; sun.awt.noerasebackground＆＃34;，＆＃34; true＆＃34;）;但它不起作用。

覆盖方法Init，从GLCanvas扩展到我的类。

public void init(GLAutoDrawable drawable) {

    this.drawable=drawable;
    gl = drawable.getGL().getGL2();
    //glu = new GLU();
    //glut = new GLUT();
    gl.setSwapInterval(1);
    gl.glClearColor(getClearColor().getRed(),getClearColor().getGreen(),getClearColor().getBlue(), 1.0f);
//*******************************
SetDefaultGLproperty();
System.setProperty("sun.awt.noerasebackground", "true");
System.out.println("PROPERTY ACTIVATE");
//SetDefaultLigthModel();

}

显示方法：

public void display(GLAutoDrawable drawable) {
  try{  
    //System.out.println("display de jcadcanvas");
    //gestion de la vista
    if (Scene.view.isSelectionMode || Scene.view.isMouseOver){
        //System.out.println("entra");
     startPicking( Scene.view.curX,Scene.view.curY);
     gl.glMultMatrixf(Scene.view.trackball.getRotMatrix(), 0);
     if (Scene!=null) Scene.DrawSceneInSelectionMode(gl);
     int r=endPicking(gl);
    if (r!=0) {
       if (Scene.view.isSelectionMode) {
           //System.out.println("select");
             Scene.selectionModel.addSelectedEntity(r);
             //isSelectionMode=false;
               } else
       if (Scene.view.isMouseOver) {
             Scene.selectionModel.setMouseOverEntity(r);
             //isMouseOver=false;
               }
     }

     //isMouseOver=false;
    }
    Scene.view.isSelectionMode=false;
     Scene.view.isMouseOver=false;
    //else { //*/*************************************



    if (Scene.view.fitView) {
        ZoomAll();
        Scene.view.fitView=false;
    } else
        SetOrthoProjection(Scene.view.leftViewVolume, Scene.view.rightViewVolume, Scene.view.bottomViewVolume, Scene.view.topViewVolume, Scene.view.nearViewVolume, Scene.view.farViewVolume);
    //System.out.println(Scene.leftViewVolume+" "+Scene.rightViewVolume+" "+Scene.bottomViewVolume+" "+ Scene.topViewVolume+" "+ Scene.nearViewVolume+" "+ Scene.farViewVolume);
     gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);

    if (Scene.view.isZoomBox) DrawZoomBox() ;  ///caja de zoom
    gl.glMultMatrixf(Scene.view.trackball.getRotMatrix(), 0);
 /*
   if (!Scene.getSelectedNode().isEmpty()){
    JAbstractEntity centro=(JAbstractEntity)Scene.getSelectedNode().get(0);
    JPoint p=centro.getCentroid();
    gl.glTranslated(-p.x, -p.y,-p.z);
   }
  * */
    if (isDrawaxes()) {
        DrawAxes(gl);
    }
    if (Scene!=null) Scene.DrawScene(gl);
    //}

  } catch(com.jogamp.opengl.GLException e){

  }catch(java.util.ConcurrentModificationException e){

  }

  if (save) save();
}

重塑方法：

public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
    //AQUI ESTA EL PROBLEMA DEL RESHAPE
    System.out.println(width+"entro"+height);
    double left = Scene.view.leftViewVolume;
    double right = Scene.view.rightViewVolume;
    double bottom = Scene.view.bottomViewVolume;
    double top = Scene.view.topViewVolume;
    if (width != aWidth) {
        System.out.println("ancho");
        double magnitud = ((Scene.view.rightViewVolume - Scene.view.leftViewVolume) * (double) height) / (double) width;
        magnitud = ((Scene.view.topViewVolume - Scene.view.bottomViewVolume) - magnitud) / 2.0;
        left = Scene.view.leftViewVolume;
        right = Scene.view.rightViewVolume;
        //bottom=topViewVolume-magnitud;
        bottom = Scene.view.bottomViewVolume + magnitud;
        top = Scene.view.topViewVolume - magnitud;
    } else if (height != aHeight) {
            System.out.println("alto");
        double magnitud = ((Scene.view.topViewVolume - Scene.view.bottomViewVolume) * (double) width) / (double) height;
        magnitud = ((Scene.view.rightViewVolume - Scene.view.leftViewVolume) - magnitud) / 2.0;
        left = Scene.view.leftViewVolume + magnitud;
        right = Scene.view.rightViewVolume - magnitud;
        bottom = Scene.view.bottomViewVolume;
        top = Scene.view.topViewVolume;
    }

    aHeight = height;
    aWidth = width;
    //System.out.println (aHeight+" "+aWidth);
    //System.out.println (width +" "+height);
    gl.glViewport(0, 0, width, height);
    SetOrthoProjectionIsotropic(left, right, bottom, top, Scene.view.nearViewVolume, Scene.view.farViewVolume);
    //fitView=true;
}

任何人都知道任何解决方案吗？

感谢您的时间

我正在使用GL2和JOGAMP库

Answer 1

如果可能，您应该在命令行中设置属性sun.awt.noerasebackground，这是肯定的。但是，由于AWT中的回归，这种解决方法不再有效，有一个针对JOGL的错误报告，但它无法在JOGL中修复：https://jogamp.org/bugzilla/show_bug.cgi?id=1182

您可以尝试用GLJPanel替换GLCanvas，但我不确定您是否会获得更好的结果。

请更准确地了解您的硬件，操作系统，Java版本，JOGL版本（2.3.2？），...

顺便说一句，如果你想避免捕获一些UnsupportedOperationException实例，请用GLU.createGLU（gl）替换glu = new GLU（）。

Swing和AWT GLCanvas闪烁/闪烁

1 个答案: