Android翻页效果，电子书(10)

   
          this.mRotation = (float)(-this.mRotation * 180.0D / 3.141592653589793D);    
   
          return true;    
      }    
   
      private float firstHalfPageTurn(PointF pageDim, PointF pageTurnCorner, PointF oppositeCorner, float xPivot, float slope, float y) {    
          float width = pageDim.x;    
          float height = pageDim.y;    
          View child = this.mPage.getChildAt(0);    
          int innerOffsetX = child.getLeft() - this.mPage.getLeft();    
          int innerOffsetY = child.getTop() - this.mPage.getTop();    
   
          float y1 = height + y;    
   
          float x2 = (float)(2.0D * y / (slope + 1.0D / slope));    
          float y2 = height + x2 / slope;    
          float page_slope = (height - y2) / (x2 - this.mPivotX);    
          if ((this.mCorner & 0x1) != 0) {    
              x2 = width - x2;    
              page_slope = -page_slope;    
          }    
          if ((this.mCorner & 0x2) != 0) {    
              y1 = height - y1;    
              y2 = height - y2;    
              page_slope = -page_slope;    
          }    
   
          float x0 = xPivot;    
          float x1 = pageTurnCorner.x;