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C#仿电子书 ,算法 贝塞尔 曲线
p1:TPoint;//曲线的开始点
p2:TPoint;//曲线的控制点
p3:TPoint;//曲线的控制点
p4:TPoint;//曲线的结束点
四点
if (undersidePathBounds.Width > 0)
{
// Get the graphics object for the underside of the image being turned
undersideG = Graphics.FromImage(pageUndersideImage);
if (USE_PIXEL_MODE_OFFSET == true)
{
undersideG.PixelOffsetMode = PixelOffsetMode.Half;
}
// Set the clip region to the underside of the currently being turned image
undersideG.Clip = new Region(pageUnderGraphicsPath);
// Draw the image; note, only the clip region should be shown
undersideG.DrawImage(UndersideBitmap, new Point(0, 0));
// Dispose of the graphics object
undersideG.Dispose();
// Now this image needs to be translated to the hotspot and then rotated.
PathTranslationMatrix = new Matrix(); // setup the translation matrix
if (USE_PIXEL_MODE_OFFSET == true)
{
PathTranslationMatrix.Translate((float)hotSpot.Origin.X, (float)hotSpot.Origin.Y);
}
else
{
PathTranslationMatrix.Translate((float)hotSpot.Origin.X-1, (float)hotSpot.Origin.Y);
}