Help geometry with respect to reference circle/arc

Group of geometric features and characters that are visible on the screen only. Help geometry will not be printed or exported. Use these functions to determine, for example, an intersection or to define a reference point. The various functions are divided into three different groups.

• Help geometry with respect to points or cursor position
• Help geometry with respect to a reference line
• Help geometry with respect to reference circle/arc

Extend Arc

The function completes without prompting the selected arc to a full circle.

Animation

Application via keyboard keys Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Additionally, press [2] The operation is finished. Application via the context menu Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Click . The context menu appears. Select: Extend ArcThe operation is finished.

Normal Arc

The function create a line through the center of the active arc or circle. You define the tilt angle by specifying another point by clicking .

Animation

Application via keyboard keys Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Additionally, press [1] The cursor drags the end of a dynamic line. Click on the second position, through which the line should cross. The operation is finished. Application via the context menu Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Click . The context menu appears. Select: Normal ArcThe cursor drags the end of a dynamic line. Click on the second position, through which the line should cross. The operation is finished.

Parallel Arc

The function creates concentric from the active circle or arc a full circle as help geometry. The radius can be specified by clicking or by numerical input of the difference (to the radius of the selected figure).

Animation

Application via keyboard keys Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Additionally, press [3] The dialog appears: Circle At the same time you can determine the radius of the circle by moving the mouse. Fix the circle by clicking on or specify the radius as the difference to the radius of the selected figure and click OK. The operation is finished. Application via the context menu Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Click . The context menu appears. Select: Parallel ArcThe dialog appears: Circle At the same time you can determine the radius of the circle by moving the mouse. Fix the circle by clicking on or specify the radius as the difference to the radius of the selected figure and click OK. The operation is finished.

Help Line as Tangent to Arcs

This function creates a tangent from the active to another to be selected circle or arc.

Animation

Application via keyboard keys Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Additionally, press [6] The information line shows: Locate first circle and select a tangent side Point to the side of the circle where the tangent is to be created. The active circle is highlighted. A temporary help line indicates the position of the tangent. Click . The operation is finished. Application via the context menu Press and hold [Ctrl]. Point to the circle or arc of interest. The figure is highlighted. Click . The context menu appears. Select: Help Line as Tangent to ArcsThe information line shows: Locate first circle and select a tangent side Point to the side of the circle where the tangent is to be created. The active circle is highlighted. A temporary help line indicates the position of the tangent. Click . The operation is finished.

Construct Circle Bounded by Geometry

The function creates a circle tangent between the selected geometric figure (e.g. between intersecting lines).

Animation

Application via the context menu Press and hold [Shift]. Click . The context menu appears. Select: Construct Circle Bounded by GeometryThe dialog appears: Construct Circle Enter the radius. Click OK. Click on the first figure of interest. Click on the second figure of interest. DDS-CAD calculates the possible positions for a circle with the specific radius from the selected figures. You can determine the position of the circle with the cursor. Fix the circle at the desired position with a click . The operation is finished.