How do use the 'Bulge' from a polyline

[Tve]

Hi,

I'm trying to write a small export utility in VB to write the coordinates of a polyline to a text file and I'm tripping on the the bulge.

On a polyline, Autocad reports coordinates and a Bulge on a vertex. I need to convert this to an arc item, and my application supports a constructor with the following arguments:

1. Centre of arc
2. Start angle
3. End Angle
4. Radius

Does anyone have experience with this?

I've managed to +/- understand ow to convert the bulge to an angle, but what I really need is the centre of the arc.


AD AUGUSTA PER ANGUSTA

Thierry

 

[Tve]

It took me a few hours, but I found this link:

http://www.cad.dp.ua/stats/a_vba/content.php?content=acentity1.html

AD AUGUSTA PER ANGUSTA

Thierry