OpenBuildings™ Station Designer Help

Place Curve Form

Creates a segmented curved linear form, such as a multi-radius curved wall, that can be composed of various curves. The curves are controlled by data points placed at each curve’s apex. The smoothness of, or number of, segments comprising the curves is controlled by the Tolerance value.

Accessed from:

  • Modeling > Forms > Place Forms > Curve


SettingDescription
Height Specifies the height of the form, unless a shape or form above prohibits extrusion. If a shape above only partially blocks extrusion, Height controls the portion of the form that can be extruded past the overlying shape or form. Enabled when the Top > Fixed Height option is selected.
Note: Height extrusion direction is defined by either the Z-axis, perpendicular to the view; or, if AccuDraw is on, by the AccuDraw Z-axis.
Width Specifies the width of the form.
BaseOffset Sets the Z axis distance between the elevation of the active floor and the elevation of the item being placed (usually the bottom surface). Base Offset can be a negative value.

BaseOffset works relative to the active floor elevation at time of placement. During instances when the ACS Plane and ACS Plane Snap locks are turned off, BaseOffset is relative to the Active Depth.

Placement icon Controls the position of the form relative to the placement points which define the start and end points of the form:
  • Places the form to the left of the creation line (baseline).
  • Places the form centered on the creation line.
  • Places the form to the right of the creation line.
Top Controls the geometry and location of the top of a form:
  • Fixed Height — The form has a uniform height as specified in the Height field. The top face of the form is parallel to the bottom face.
  • Connect Shapes — The form is extruded so that it connects to one or more shapes and/or forms. Selecting Connect Shapes displays the Delete Construction check box, which enables or disables the deletion of the limiting shapes and/or forms.
  • Connect 3 pts — The top of the form is located in an imaginary plane defined by three data points.
  • Connect 2 pts/View — The top of the form is located in an imaginary plane constructed through two data points and perpendicular to the view where the last data point is entered.
Delete Constructions Enabled when the Top > Connect Shapes option is selected, limiting shapes and forms are deleted when on.
Tolerance Controls the smoothness of the curve form. Larger tolerances result in a rough curve form and smaller tolerances result in a smooth curve form.
  • Coarse curve shape – as the tolerance value increases, the number of approximating line segments composing the curve form is reduced. The result is a more coarse curve shape.
  • Smooth curve shape – as the tolerance value decreases, the number of approximating line segments composing the curve form increases. The result is a more smooth curve shape.
3D Dynamics During placement, controls whether the display of the form being placed dynamically displays in 3D or in 2D:

If on, forms being placed dynamically display in 3D.

If off, forms being placed display in 2D.

Roof Tolerance Enabled when the Top > Connect Shapes option is selected, a curved connecting shape is stroked using the specified tolerance before it is used to create a roof on the form when on. The curved shape is used to create a feature on the form that is the exact shape of the curve when off.
Key-in: TFPLACE FORM 1CURVE