Arc (Center-Radius-Angles)

Arc (Center-Radius-Angles) is one of the two arc drawing techniques in the program. To draw arc using this command:

Image/idearchitectural00090000.gif Click Draw/Primitives/Arc/Center-Radius-Angles.

Image/idearchitectural00090000.gif Left-click any point on the drawing area. This point is the center of the arc segment to be drawn.

Image/idearchitectural00090000.gif Drag the mouse. A virtual circle image will also move depending on the motion of the cursor. Decide on the radius of the circle. You may enter the radius numerically as well. You can use the co-ordinate box for this purpose. (Press L from the keyboard. The cursor will get in the L cell on the co-ordinate box. Type the value (m) and press enter. The cursor will be locked to the entered value.)

Image/idearchitectural00090000.gif Left-click.

Image/idearchitectural00090000.gif Move the mouse cursor counter-clockwise. The arc will be started to be drawn depending on the mouse cursor. You can enter arc angle at this moment using the co-ordinate box. (Press A from the keyboard. The cursor will get in the A cell on the co-ordinate box. Type the value (degree) and press enter. The cursor will be locked to the entered value.)

Image/idearchitectural00090000.gif Left-click once again. The arc will be drawn.

If you want to change the form of an existing arc you can intervene to its nodes. There are 3 nodes –2 nodes at the ends and one in the middle- on the arc.

Image/idearchitectural00090000.gif Select the arc by left-clicking.

Image/idearchitectural00090000.gif Bring the mouse cursor on the node that you want to intervene on the arc. Left-click as soon as you see the OK sign. (The transformation of the cursor to OK sign means that the cursor catches the exactly the related node. To be able to catch nodes the Snap To Nodes mode should be active. If it is not active click Tools/Snap/Snap To Nodes to open it.)

Image/idearchitectural00090000.gif When you move the mouse cursor, the clicked point will also move depending on the motion of the cursor. The arc will change form. Left-click to complete the procedure.