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-   -   Dear Robin,do you think that isClosed value should be Zero for a partial circle? (http://www.dimcax.com/hust/showthread.php?t=736)

yogy 2007-05-20 09:51 AM

Dear Robin,do you think that isClosed value should be Zero for a partial circle?
 
Q:
Subject: Dear Robin,do you think that isClosed value should be Zero for a partial circle?

Dear Robin,

When I try to get the following parameters (shown in red font, such as m_min_t, m_max_t, isClosed, isPeriodic) from partial curve in Sketch, I get the incorrect result for the parameters. For example, for a partial circle, I get the incorrect result of the parameters as follows.
m_min_t = 0;
m_max_t = 6.28;
isClosed = 1;
isLPeriodic = 1;
I think that isClosed value should be Zero for a partial circle. Do you?
The source file is attached in the Email.

My code is as follows.
ISketchSegment swSketchSegment(dSketchSegment);
dSegmentCurve = swSketchSegment.GetCurve();



if (dSegmentCurve != NULL)
{
int isPeriodic, isClosed;
ICurve swCurve(dSegmentCurve);
swCurve.GetEndParams (&m_min_t, &m_max_t, &isClosed, &isPeriodic);
swCurve.DetachDispatch();

}
Yogy

yogy 2007-05-20 09:52 AM

回复: Dear Robin,do you think that isClosed value should be Zero for a partial circle?
 
R:
Yogy,

The parametric range is the valid range for the curve. If the curve is infinite (such as a line), then the parametric maximum is the largest permissible value in the parametric space.



Use Edge::GetCurveParams2 to determine if a circular edge is a complete circle or an arc.



Also, you may need to create a TrimmedCurve before getting the parameters.



Robin Richter


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