I am trying to make an isometric drawing of an circle.
When I try do draw an ellipse it asks for x and y radii and the angle.
I know the radius of the original circle and the angle, 30 degrees.
How do I calculate the x and y radii?
Thanks for the help, Rick
Drawing an Ellipse
Moderator: andrew
Forum rules
Always indicate your operating system and QCAD version.
Attach drawing files and screenshots.
Post one question per topic.
Always indicate your operating system and QCAD version.
Attach drawing files and screenshots.
Post one question per topic.
-
Husky
- Moderator/Drawing Help/Testing
- Posts: 5071
- Joined: Wed May 11, 2011 9:25 am
- Location: USA
Re: Drawing an Ellipse
Hi,
may I ask you why you are not using the QCAD Isometric Projection tools below Menu: View > Top Projection etc ? To easy?
Work smart, not hard: QCad Pro
QcadPro, QcadCam, Win11/64, 64GB RAM, 10-Core, SSD
If a thread is considered as "solved" pls. change the title of the 1. post to "[solved] Title..."
QcadPro, QcadCam, Win11/64, 64GB RAM, 10-Core, SSD
If a thread is considered as "solved" pls. change the title of the 1. post to "[solved] Title..."
-
CVH
- Premier Member
- Posts: 5097
- Joined: Wed Sep 27, 2017 4:17 pm
Re: Drawing an Ellipse
Hi,
An isometric projection of a Circle, an Arc, is a bit more complex than a scaling factor.
It is an inscribed Ellipse in a quadrilateral or a part of such a full Ellipse.
For hand-drawing, project the axis-aligned square to isometric and draw an inscribed Ellipse (EQ) shape in that .
Crop that for an Arc at projected endpoints.
The angled cut of a circular object is also an Ellipse contour in the cutting plane.
Then it is the simple matter of scaling one of the radii.
Regards,
CVH
An isometric projection of a Circle, an Arc, is a bit more complex than a scaling factor.
It is an inscribed Ellipse in a quadrilateral or a part of such a full Ellipse.
For hand-drawing, project the axis-aligned square to isometric and draw an inscribed Ellipse (EQ) shape in that .
Crop that for an Arc at projected endpoints.
The angled cut of a circular object is also an Ellipse contour in the cutting plane.
Then it is the simple matter of scaling one of the radii.
Regards,
CVH