#### Circle

 With the Circle tool you can create objects with a circular cross section. I.e. circles, disks, cylinders, cones, cut cones, hyperboloids and ellipsoid segments. Also NURBS meshes and Subdivision Surface objects of those shapes can be created. Disk Map, Cylinder Map, Mesh Map objects and circular trim curves can also be created. The tool can also be used for 3D painting circular curves to underlying objects that have bitmap textures. The Circle tool has the following options:

Define - How the circle is defined. The choices are:

• Center & Axes
• Corner & Corner
• Three points in arc
• Center & Corner

Class - Class of the circular object to be created.
•  Geometry - Creates a geometry object. Type - type of the geometry object
•  Analytic
• Extrude
• Planar - Creates circles and disks.
• Extruded - Creates cylinders, cones and cut cones.
• Hyperboloid - Creates hyperboloids and ellipsoid segments.
• Filled - If checked, closes the caps
• Arc - If checked creates open arcs
•  Nurbs
• Order - order of the NURBS curve or surface
• Polygonal
• Cubic
• Extrude
• Planar - Creates planar circular NURBS curves or NURBS disks.
• Extruded - Creates NURBS meshes shaped as cylinders, cones and cut cones.
• Hyperboloid - Creates NURBS meshes shaped as hyperboloids and ellipsoid segments.
• Filled - If checked, closes the caps.
• Arc - If checked creates open arcs.
• Exact - If checked creates an exact NURBS circle.
• Points - Number of points in curve or surface.
• Density - Number of extra curves
•  Subdivision
• Extrude
• Planar - Creates planar circular SDS disks.
• Extruded - Creates SDS objects shaped as cylinders, cones and cut cones.
• Hyperboloid - Creates SDS objects shaped as hyperboloids and ellipsoid segments.
• Arc - If checked creates open arcs
• Points - Number of points in curve or surface
• Density - Number of extra curves
• SDS Type - SDS object type. Possible values are:
• Smoothen to nurbs
• Smoothen to rectangles
• Smoothen to triangles
• Polygonal
•  Disk Map - Creates a disk mapping.
• Arc - If checked creates open arcs.
• Class - class of the map created
• Material - Map a material
• Effect - Map a particle post effect
• Effect Name - name of the material or particle post effect to be mapped
•  Cylinder Map - Creates a cylinder mapping.
• Arc - If checked creates open arcs
• Class - class of the map created
• Material - Map a material
• Effect - Map a particle post effect
• Effect Name - name of the material or particle post effect to be mapped
•  Mesh Map - Creates a mesh mapping.
• Order - order of the NURBS curve or surface
• Polygonal
• Cubic
• Filled - If checked, closes the caps
• Arc - If checked creates open arcs
• Points - Number of points in curve or surface
• Density - Number of extra curves
• Class - class of the map created
• Material - Map a material
• Effect - Map a particle post effect
• Effect Name - name of the material or particle post effect to be mapped
•  Trim Curve - Creates a circular trim curve.
• Order - order of the NURBS trim curve
• Polygonal