centerW copyFrom cxWnd cyWnd dpiX dpiY GiTransformImpl matD2M matD2W matM2D matM2W matW2D matW2M maxViewScale minViewScale rectLimitsW tmpCenterW tmpViewScale updateTransforms viewScale w2dx w2dy ydown zoomChanged zoomEnabled zoomNoAdjust zoomPanAdjust zoomTimes

matM2W Matrix2d GiTransformImpl::matM2W 模型坐标系到世界坐标系的变换矩阵，默认单位矩阵