Tube SOP

Summary

The Tube SOP generates open or closed tubes, cones, or pyramids along the X, Y or Z axes. It outputs as meshes, polygons or simply a tube Primitive.

tubeSOP_Class

Parameters - Tube Page

Primitive Type type - ⊞ - Select from the following types. For information on the different types, see the Geometry category articles.

• Primitive prim -

• Polygon poly -

• Mesh mesh -

• NURBS nurbs -

• Bezier bezier -

Connectivity surftype - ⊞ - This option is used to select the type of surface, when using a Mesh Primitive Type.

• Rows rows - Creates horizontal lines.

• Columns cols - Creates vertical lines.

• Rows and Columns rowcol - Both Rows and Columns. Looks like Quads in wire frame display, but all polygons are open (if the primitive type is polygon).

• Triangles triangles - Build the grid with Triangles.

• Quadrilaterals quads - Generates sides composed of quadrilaterals (default).

• Alternating Triangles alttriangles - Generates triangles that are opposed; similar to the Triangles option.

Orientation orient - ⊞ - Primary axis of tube (long axis).

• X Axis x -

• Y Axis y -

• Z Axis z -

Orient Bounds orientbounds - Available only when an input is connected to the Tube SOP to set bounds for the tube. When Orient Bounds = On it will rotate the geometry to match the orientation of the input SOP used for bounds.

Modify Bounds modifybounds - Enabled only when an input is connected to the Tube SOP to set bounds for the tube. Turn Modify Bounds = On to enable the transform parameters below to further modify the position, scale, radius and height of the bounds.

Rotate Order rord - ⊞ -

• Rx Ry Rz xyz -

• Rx Rz Ry xzy -

• Ry Rx Rz yxz -

• Ry Rz Rx yzx -

• Rz Rx Ry zxy -

• Rz Ry Rx zyx -

Center t - ⊞ - Location of the tube center from the object origin.

• X tx -

• Y ty -

• Z tz -

Rotate r - ⊞ -

• Rotate rx -

• Rotate ry -

• Rotate rz -

Radius rad - ⊞ - The first field is the radius of the top of the tube and the second field represents the radius of the bottom of the tube.

• rad1 -

• rad2 -

Height height - The height of the tube.

Anchor U anchoru -

Anchor V anchorv -

Anchor W anchorw -

Imperfect imperfect - This option applies only to Bezier and NURBS types. If selected, the tube is an approximated nonrational curve, otherwise it is a perfect rational curve.

Parameters - Detail Page

Rows rows - Number of rows in tube.

Columns cols - Number of columns in tube.

U Order orderu - If a spline surface is selected, it is built at this order for U.

V Order orderv - If a spline surface is selected, it is built at this order for V.

End Caps cap - If selected, it adds faceted end caps to the ends of the tube.

Texture Coordinates texture - ⊞ - Adds UV texture coordinates to the sphere.

• Off off - No UV coordinates added to surface.

• Row & Columns rowcol - Adds vertex UV coordinates.

Compute Normals normals - Checking this option On will compute surface normals.

Operator Inputs

• Input 0 -

Info CHOP Channels

Extra Information for the Tube SOP can be accessed via an Info CHOP.

Common SOP Info Channels

• num_points - Number of points in this SOP.

• num_prims - Number of primitives in this SOP.

• num_particles - Number of particles in this SOP.

• last_vbo_update_time - Time spent in another thread updating geometry data on the GPU from the SOP's CPU data. As it is part of another thread, this time is not part of the usual frame time.

• last_meta_vbo_update_time - Time spent in another thread updating meta surface geometry data (such as metaballs or nurbs) on the GPU from the SOP's CPU data. As it is part of another thread, this time is not part of the usual frame time.

Common Operator Info Channels

• total_cooks - Number of times the operator has cooked since the process started.

• cook_time - Duration of the last cook in milliseconds.

• cook_frame - Frame number when this operator was last cooked relative to the component timeline.

• cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.

• cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.

• cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.

• cooked_this_frame - 1 if operator was cooked this frame.

• warnings - Number of warnings in this operator if any.

• errors - Number of errors in this operator if any.

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An Operator Family that reads, creates and modifies 3D polygons, curves, NURBS surfaces, spheres, meatballs and other 3D surface data.

A surface type in SOPs including polygon, curve (NURBS and Bezier), patch (NURBS and Bezier) and other shapes like sphere, tube, and metaball. Points and Primitives are part of the Geometry Detail, which is a part of a SOP.

A polygon is a type of Primitive that is formed from a set of Vertices in 3D that are implicitly connected together to form a multi-edge shape.

An Operator Family which operate on Channels (a sequence of numbers (Samples)) which are used for animation, audio, mathematics, simulation, logic, UI construction, and data streamed from/to devices and protocols.

The Graphics Processing Unit. This is the high-speed, many-core processor of the graphics card/chip that takes geometry, images and data from the CPU and creates images and processed data.