private void Initialize()
{
_cx = _radialGradElement.cx.value;
_cy = _radialGradElement.cy.value;
_r = _radialGradElement.r.value;
_fx = _radialGradElement.fx.value;
_fy = _radialGradElement.fy.value;
_stopColorList = new List<Color>();
_stopOffsetList = new List<float>();
_spreadMethod = _radialGradElement.spreadMethod;
GetStopList();
FixF();
_vitriOffset = 0;
PreColorProcess(_vitriOffset);
}