I am doing the function of Microsoft visio file parsing to the web canvas. When compatible with the attributes of EllipticalArcTo, I do not know how to map the EllipticalArcTo to the ellipse method of canvas. Their parameters are different. I am also not sure what the control point of EllipticalArcTo mentioned in visio’s official website refers to specifically. I think my geometric ability is relatively weak. I would be grateful if you could provide me with any help.