Android翻页效果，电子书(9)

   
          this.mPageTurnCorner.x = 0.0F;    
          this.mPageTurnCorner.y = height;    
          this.mOppositeCorner.x = width;    
          this.mOppositeCorner.y = 0.0F;    
          float x0 = this.mPivotX;    
          float cornerIntersect = height * width / (height + width);    
          if ((this.mCorner & 0x1) != 0) {    
              this.mPageTurnCorner.x = width;    
              this.mOppositeCorner.x = 0.0F;    
              x0 = width - x0;    
          }    
   
          if ((this.mCorner & 0x2) != 0) {    
              this.mPageTurnCorner.y = 0.0F;    
              this.mOppositeCorner.y = height;    
          }    
   
          this.mPageDim.x = width;    
          this.mPageDim.y = height;    
          float page_slope;    
   
          if (this.mPivotX <= cornerIntersect) {    
              page_slope = firstHalfPageTurn(this.mPageDim, this.mPageTurnCorner, this.mOppositeCorner, x0, slope, y);    
          } else {    
              page_slope = secondHalfPageTurn(this.mPageDim, this.mPageTurnCorner, this.mOppositeCorner, x0, slope, y);    
          }    
   
          this.mRotation = (float)Math.atan(page_slope);