794 AutoCAD and Its Applications—Basics Copyright Goodheart-Willcox Co., Inc. Polar Parameters Pol a r P a r a meter s A polar parameter provides the same function as a linear parameter, but creates an angle, or rotation, property in addition to a distance property. You can assign move, scale, stretch, polar stretch, and array actions to a polar parameter. For example, assign a polar parameter with a polar stretch action to the steel channel shape shown in Figure 26-17 to adjust the depth to create different size channels, and rotate the block at the same time if necessary. See Figure 26-18. To insert the polar parameter, access the Polar parameter option. Use the Label option to change the label name to Depth, but keep the default angle name. Then specify the base point, such as the left endpoint shown. Pick an endpoint aligned with the base point, such as the opposite endpoint shown. After you select the base point and endpoint, pick a location for the parameter label. Next, enter the number of grips to associate with the parameter. Select the 1 option to assign a grip at the endpoint only, as shown in Figure 26-17. You will be able to grip-edit the block only if an action is associated with the endpoint. NOTE NOTE Name, Label, Chain, Description, Palette, and Value set options are available before you specify the parameter. Most of these options are also available from the Properties palette if you have already created the parameter. Ribbon Block Editor Action Parameters Polar Type BPARAMETER Polar polar parameter: A parameter that includes a distance property and an angle property. Figure 26-16. Scaling the sink dynamically. Notice that the vanity portion of the block remains the same. Move the grip Original sink edge Figure 26-17. Adding a polar parameter. 1. Pick the endpoint of the line to specify the base point 2. Pick the endpoint of the line to specify the endpoint 3. Pick to place the label