Autodesk 00308-011408-9F30A User Guide - Page 372

break length In dimensioning, the length of the gap that separates an extension line from its dimension point. by-layer Term used to indicate that the layer an entity is on determines its color, style, or width. by-symbol Term used to indicate that the symbol instance properties are used for color, style, or width. CAD Computer-aided design (or drafting). calculated value A database value that is calculated automatically based on the geometry or other property of an entity. Assigning certain variables, such as %length, %area, or %color, to a field returns a calculated value. cartesian coordinates See xy coordinates. centerline dimension A type of dimension used to mark the center of an arc or circle. It consists of a "cross" marker at the center point and four lines extending from the center point through the quadrant points. Centerpoint snap The snap that allows you to enter the center of an arc, circle, polygon, or bulged poly-segment by clicking anywhere along the entity itself. chain dimensioning A type of linear dimensioning in which each dimension in a series is measured from the extension line of the previous dimension. See also baseline dimensioning and single dimensioning. channel To trim an entity by removing any portion that falls between two specified parallel lines. circle An entity defined by a centerpoint and a radius. circular array A series of entities or entity groups arranged in a circular pattern. circular grid A reference grid whose axes extend radially from the grid origin. Circular grids provide an excellent reference tool for drawings that require alignment of points along an arc or circle, such as a mechanical drawing of a gear. Also known as a polar grid. See also Isometric Grid, Rectangular Grid, and Reference Grid. circular grid angle The angle between major gridlines in a circular reference grid. Since the sum of all the angles must equal 360, a smaller grid angle will result in the display of more major lines. circumscribed polygon A regular polygon whose sides are tangent to a defining circle at their midpoints. See also inscribed polygon and regular polygon. closed polygon or curve A polygon or curve whose startpoint and endpoint are connected. cloud A cloud is a specialized irregular polygon that allows you to call attention to specific areas of a drawing. For example, you can draw a cloud around a section of the drawing that has recently been updated. command The full name associated with an action you carry out by clicking a screen component such as a menu item or button. In AutoSketch, a complete list is displayed in the Customize Commands dialog box. command bitmap The bitmap graphic associated with a command that AutoSketch uses to represent the command as a button. 362 | Glossary