如何循環（360º）多邊形（方形）觸摸屏幕？

Question

其實我有一個應用程序創建一個正方形（多邊形，而不是一個方塊，一個正方形），用戶可以旋轉它觸摸屏幕，但有些東西壞，因爲旋轉不公平，它只能旋轉它水平和垂直，但不是循環。我需要用戶可以循環旋轉它。

我用這個代碼做旋轉（水平/垂直）

public void onDrawFrame(GL10 gl) { 
    //Clear Screen And Depth Buffer 
    gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);  
    gl.glLoadIdentity();     //Reset The Current Modelview Matrix 

    //Drawing 
    gl.glTranslatef(0.0f, 0.0f, z);   //Move z units into the screen 
    gl.glScalef(0.8f, 0.8f, 0.8f);   //Scale the Cube to 80 percent, otherwise it would be too large for the screen 

    //Rotate around the axis based on the rotation matrix (rotation, x, y, z) 
    gl.glRotatef(xrot, 1.0f, 0.0f, 0.0f); //X 
    gl.glRotatef(yrot, 0.0f, 1.0f, 0.0f); //Y 

    square.draw(gl);     //Draw the Cube 

    //Change rotation factors 
    xrot += xspeed; 
    yrot += yspeed; 
} 

public boolean onTouchEvent(MotionEvent event) { 
     // 
     float x = event.getX(); 
     float y = event.getY(); 

     //If a touch is moved on the screen 
     if(event.getAction() == MotionEvent.ACTION_MOVE) { 
      //Calculate the change 
      float dx = x - oldX; 
      float dy = y - oldY; 
      //Define an upper area of 10% on the screen 
      int upperArea = this.getHeight()/10; 

      //Zoom in/out if the touch move has been made in the upper 
      if(y < upperArea) { 
       z -= dx * TOUCH_SCALE/2; 

      //Rotate around the axis otherwise 
      } else {     
       xrot += dy * TOUCH_SCALE; 
       yrot += dx * TOUCH_SCALE; 
      }   

     //A press on the screen 
     } else if(event.getAction() == MotionEvent.ACTION_UP) { 
      //Define an upper area of 10% to define a lower area 
      int upperArea = this.getHeight()/10; 
      int lowerArea = this.getHeight() - upperArea; 

      //Change the light setting if the lower area has been pressed 
      if(y > lowerArea) { 

      } 
     } 

     //Remember the values 
     oldX = x; 
     oldY = y; 

     //We handled the event 
     return true; 
    } 

Answer 1

你應該試試這個：

yourRootLayout.setOnClickListener(yourListener); 
    yourAnimation = new RotateAnimation(0.0f, 360.0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); 
    yourAnimation.setDuration(duration in milliseconds - int); 

@Override 

protected void onClick(View view){ 

    if (view.getId() == R.id.yourRootLayoutId){ 

     yourRootLayout.startAnimation(yourAnimation); 

    } 

}