Circle > Radius - Object - Point (Draw Menu)

This command draws a circle with a given radius which is tangent to a given line (or Construction Aid line) and a given circle (or Construction Aid circle) and runs through a given point.

If a circle is to be drawn while working in isometric or dimetric views, this must be done with the command Ellipse > Vector - Vector because the result on the page is not circular but elliptical.

After choosing this command a dialog appears in which the radius of the circle can be entered.

Any part of an existing object can be identified as a reference object. This can be a side of a rectangle or a circle arc within a surface. Ellipses and ellipse parts can not be identified.

The identified object is referred to as the "Reference Object".

The position at which the object was identified (the "ID point") has no effect on the rest of the command. Because there are up to four possible results it would be too complicated to make a choice on the basis of the ID point's position.

The point through which the circle should run can be entered by clicking the mouse at any point within the drawing.

After identifying the reference object and entering the point, then all the possible circles are calculated (the graphic shows one possible result).

The desired circle can then be chosen with the help of a small dialog. Only one circle can be chosen at a time.

If the points are further than twice the radius from the object then the circles can not be calculated. In this case an error message appears.

The circle is assigned to the current layer. In addition, it contains a reference to the current pen.