Arcs & Circles. Autodesk AUTOSKETCH 8

Arcs & Circles

AutoSketch provides many tools for drawing arcs and circles, including elliptical arcs and ellipses. With a full range of drawing methods at your disposal, you are almost certain to find a tool at hand that allows you to work within the parameters of your current design. This chapter describes the many ways you can draw arcs, circles, and ellipses.

13

In this chapter

■

Drawing arcs based on points

■

Drawing circles based on points

■

Drawing tangent circles

■

Drawing ellipses

155

An arc is a segment of a circle defined by a centerpoint, radius, starting angle, and included angle. Two geometric properties define a circle: the centerpoint and radius. You can change these properties by selecting an arc or circle and changing the corresponding settings on the edit bar.

You can draw a circular arc by specifying any of the following:

■

■

■

Startpoint, endpoint, and a point on the arc

Startpoint, endpoint, and centerpoint

Startpoint, endpoint, and included angle

An elliptical arc is an ellipse with less than 360 degrees. You can draw an elliptical arc by specifying any of the following:

■

■

A rectangle using two points (in which an ellipse is tangent to all four sides), start angle, and included angle

Major and minor axes using three points, start angle, and included angle

You can draw a circle by specifying any of the following:

■

■

■

■

■

■

Centerpoint and a point on the circle

Two points on opposite sides of the circle

Three points on the circle.

Centerpoint and radius

Radius and two entities to which the circle is tangent

Three entities to which the circle is tangent

156 |

Chapter 13 Arcs & Circles