Creating NURBSCVSurface Values

The following functions provide shorthand ways to construct NURBSCVSurface values that you can then add to a NURBSSet for creation in the scene.

MakeNURBSLatheSurface <curve> <origin> <north> <start> <end>

This function generates a NURBS surface of revolution given an input curve, origin, up axis, and start and end angles. The output of this function is a NURBS Surface. Note that this is a CV surface that matches the definition, not a relational surface.

curve <NURBSCurve>

This is the NURBS curve that is revolved.

origin <point3>

Specifies the origin of the revolution.

north <point3>

This is the axis that specified the up direction.

start <float>

This is the start angle of the revolution in radians.

end <float>

This is the end angle of the revolution in radians.

MakeNURBSSphereSurface <radius> <center> <north_axis> <ref_axis> <startU> <endU> <startV> <endV> [open:<boolean>]

This function generates a NURBS sphere. The output of this function is a NURBS Surface. Note that this is a CV surface that matches the definition, not a relational surface.

radius <float>

The radius of the sphere.

center <Point3>

The center point of origin of the sphere.

north_axis <Point3>

This specifies the up axis. Use (Point3 0 0 1) for the Z axis for example.

ref_Axis <Point3>

This is the direction of the seam. The sphere primitive uses (Point3 0 -1 0) as this value. The northAxis and refAxis must be perpendicular to one another.

startU <float>

The start angle for the sphere in the U direction, specified in radians.

endU <float>

The end angle for the sphere in the U direction, specified in radians.

startV <float>

The start angle for the sphere in the V direction, specified in radians.

endV <float>

The end angle for the sphere in the V direction, specified in radians.

open: <boolean>

If true, the surface is closed; otherwise the surface is not closed. Defaults to false.

MakeNURBSCylinderSurface <radius> <height> <origin> <sym_axis> <ref_axis> <start> <end> [open:<boolean>]

This function generates a NURBS cylinder. The output of this function is a NURBS Surface. Note that this is a CV surface that matches the definition, not a relational surface.

radius <float>

The radius of the cylinder.

height <float>

The height of the cylinder.

origin <Point3>

The origin of the cylinder.

sym_Axis <Point3>

The axis of symmetry. The standard cylinder primitive specifies (Point3 0 0 1).

ref_Axis <Point3>

This is the direction of the seam. The standard cylinder primitive specifies (Point3 0 1 0). The symAxis and refAxis must be perpendicular to one another.

start <float>

The start angle in radians.

end <float>

The end angle in radians.

open: <boolean>

If true, the surface is closed; otherwise the surface is not closed. Defaults to false.

MakeNURBSConeSurface <radius1> <radius2> <height> <origin> <sym_axis> <ref_axis> <start> <end> [open:<boolean>]

This function generates a NURBS cone surface. The output of this function is a NURBS Surface. Note that this is a CV surface that matches the definition, not a relational surface.

radius1 <float>

One of the radii of the cone.

radius2 <float>

The other radius of the cone.

height <float>

The height of the cone.

origin <Point3>

The origin of the cone.

sym_Axis <Point3>

The axis of symmetry.

ref_Axis <Point3>

This is the direction of the seam. The symAxis and refAxis must be perpendicular to one another.

start <float>

The start angle in radians.

end <float>

The end angle in radians.

open: <boolean>

If true, the surface is closed; otherwise the surface is not closed. Defaults to false.

MakeNURBSTorusSurface <majorRad> <minorRad> <origin> <sym_axis> <ref_axis> <startU> <endU> <startV> <endV> [open:<boolean>]

This function generates a NURBS torus surface. The output of this function is a NURBS Surface. Note that this is a CV surface that matches the definition, not a relational surface.

Note:

This surface is not closed surface.

majorRad <float>

This is the radius of the entire 'donut' shape.

minorRad <float>

The is the radius of the 'tube'.

origin <Point3>

The origin of the cone.

sym_Axis <Point3>

The axis of symmetry.

ref_Axis <Point3>

This is the direction of the seam. The symAxis and refAxis must be perpendicular to one another.

startU <float>

The start angle of the torus in the U direction.

endU <float>

The end angle of the torus in the U direction.

startV <float>

The start angle of the torus in the V direction.

endV <float>

The end angle of the torus in the V direction.

open: <boolean>

If true, the surface is closed; otherwise the surface is not closed. Defaults to false.