View / Viewport title
The CPlane command sets the origin and orientation of the construction plane in the active viewport.
A construction plane is like a tabletop that the cursor normally moves on. The construction plane has an origin, x and y axes, and a grid. The construction plane can be set to any orientation, and each viewport’s construction plane is independent of those in other viewports.
The construction plane represents the local coordinate system for the viewport and can be different from the world coordinate system.
Rhino’s standard viewports come with construction planes that correspond to the viewport. The default Perspective viewport, however, uses the world Top construction plane, which is the same construction plane that is used in the Top viewport.
The construction planes in all viewports change so their origin is at the picked location.
The Curve option sets the construction plane perpendicular to a curve.
Type subcrv to select part of a curve as input.
The Elevation option changes the elevation (z direction) of the construction plane.
The Gumball option sets the construction plane to match the gumball orientation of the currently selected object.
The Object option sets the construction plane in the active viewport to an object.
The Rotate option rotates the construction plane.
The Surface option sets the construction plane to match a surface. The placement is constrained so that the construction plane is tangent to the surface.
Reverses the direction.
Uses entire untrimmed underlying surface.
Moves the construction plane in the current viewport in its z direction, so its xy plane intersect the selected point.
Moves the construction planes in all viewports in their z directions, so their xy planes intersect the selected point.
Sets the construction plane in the active viewport parallel to the view.
Restores the specified default construction plane.
The 3Point option sets the construction plane in the active viewport by specifying points to establish the x, y, and z directions.
Sets the construction plane perpendicular to the current construction plane.
Sets the construction plane z axis direction.
Restores the previously used construction plane in the current viewport.
Shift + Home
Restores the construction plane that was active before the Undo option was used.
Shift + End
The AutoAlignCPlane command turns Auto CPlane on/off and manages the related options.
When Auto CPlane is turned on, the CPlane in the current viewport automatically aligns with the selected curve, surface, or sub-surface. The curve has to be planar, while the surface or sub-surface can be either planar or non-planar.
Auto CPlane can be toggled on/off by clicking the Auto CPlane pane on the status bar.
If the selected curve or surface is coplanar with the current CPlane, or the surface has a seam, Auto CPlane will not activate.
In parallel viewports, Auto CPlane will not activate if the view angle to the CPlane is lower than 15 degrees.
The AutoAlignCPlane command can be run nested in other commands to change options from the command-line.
Turns Auto CPlane on/off .
The alignment mode can also be set by right-clicking the Auto CPlane pane on the status bar.
Aligns the CPlane with the plane of the selected curve or surface.
Attempts to keep the X and Y axes of the CPlane aligned with the closest world axes.
Attempts to keep the CPlane Y aligned with the camera up of the view.
Changes the alignment mode through Object, World, and View.
Locks the CPlane to the current position and orientation.
The Locked option is only available when an Auto CPlane is active before the AutoAlignCPlane command runs.
The lock/icon on the Auto CPlane pane indicates the current locking state.
Click on the lock icon to toggle the locking state.
The CPlane stays on the previously selected planar object/sub-object until another one is selected.
Click Auto CPlane on the status bar to enable Auto Aligned CPlane.
Use Sub-object selection to select a face on a polysurface by Ctrl(CMD)+Shift+Click.
Draw a circle.
The circle is co-planar with the face.
Deselect the face.
Select another face on the polysurface.
Draw a circle.
The second circle is co-planar with the second face.
The CopyCPlaneToAll command changes all viewports to have the same construction planes as the specified viewport.
The CopyCPlaneSettingsToAll command changes all viewports to have the same grid settings and snap spacing as the specified viewport.
Set up a relationship between a construction plane and an object.
Manage the named construction planes list.
Use construction planes
Rhinoceros 8 © 2010-2024 Robert McNeel & Associates. 28-Feb-2024