bool MgArc::_setHandlePoint(int index, const Point2d& pt, float)
{
if (index == 1) {
return setStartMidEnd(pt, getMidPoint(), getEndPoint());
}
if (index == 2) {
return setStartMidEnd(getStartPoint(), getMidPoint(), pt);
}
if (index == 3) {
return setStartMidEnd(getStartPoint(), pt, getEndPoint());
}
if (index == 4) {
float a = (pt - getCenter()).angle2();
return setCenterRadius(getCenter(), getRadius(), a, getEndAngle() - a);
}
if (index == 5) {
float a = (pt - getCenter()).angle2();
return setCenterRadius(getCenter(), getRadius(), getStartAngle(), a - getStartAngle());
}
if (index == 6) {
return setTanStartEnd(pt - getStartPoint(), getStartPoint(), getEndPoint());
}
if (index == 7) {
return (setTanStartEnd(getEndPoint() - pt, getEndPoint(), getStartPoint())
&& _reverse());
}
return setCenterStartEnd(pt, getStartPoint(), getEndPoint());
}
bool MgArc::_setHandlePoint2(int index, const Point2d& pt, float, int& data)
{
static float lastSweepAngle;
if (index == 1 || index == 2) { // 起点、终点
return setCenterRadius(getCenter(), pt.distanceTo(getCenter()), getStartAngle(), getSweepAngle());
}
if (index == 3) { // 弧线中点
return setStartMidEnd(getStartPoint(), pt, getEndPoint());
}
if (index == 4) { // 改变起始角度
if (data == 0) {
lastSweepAngle = getSweepAngle();
data++;
}
Point2d startPt(getCenter().polarPoint((pt - getCenter()).angle2(), getRadius()));
bool ret = setCSE(getCenter(), startPt, getEndPoint(), lastSweepAngle);
lastSweepAngle = getSweepAngle();
return ret;
}
if (index == 5) { // 改变终止角度
if (data == 0) {
lastSweepAngle = getSweepAngle();
data++;
}
Point2d endPt(getCenter().polarPoint((pt - getCenter()).angle2(), getRadius()));
bool ret = setCSE(getCenter(), getStartPoint(), endPt, lastSweepAngle);
lastSweepAngle = getSweepAngle();
return ret;
}
if (index == 6) {
return setTanStartEnd(pt - getStartPoint(), getStartPoint(), getEndPoint());
}
if (index == 7) {
return (setTanStartEnd(getEndPoint() - pt, getEndPoint(), getStartPoint())
&& _reverse());
}
return offset(pt - getCenter(), -1);
}
