CAD editing

CAD systems offer the engineer powerful editing features that reduce the design time by avoiding all the manual redrawing that was traditionally required. Common editing features are performed on cells of single or conglomerate geometric shape elements. Most of the editing features offered in CAD is transformations performed using algebraic matrix manipulations. Transformation in general refers to the movement or other manipulation of graphical data.

Most CAD systems offer all of the following editing functions, as well as others that might be specific to a program being used: (1) Movement: Allows a cell to be moved to another location on the display screen. (2) Duplication: Allows a cell to appear at a second location without deleting the original location. Rotation: Rotates a cell a given angle about an axis. (4) Mirroring: Displays a mirror image of the cell about a plane. (5) Deletion: Removes the cell from the display and the design data file. (6) Removal: Erases the cell from the display, but maintains it in the design data file. (7) Trim: Removes any part of the cell extending beyond a defined point, line, or plane. (8) Scaling: Enlarges or reduces the cell by a specified factor along x-, y-, and z-axes. (9) Offsetting: Creates a new object that is similar to a selected object at a specified distance. (10) Chamfering: Connects two nonparallel objects by extending or trimming them to intersect or join with a beveled line. (11) Filleting: Connects two objects with a smoothly fitted arc of a specified radius. (12) Hatching: User can edit both hatch boundaries and hatch patterns

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