Vectron software module utilizes Vector-Polygon geometry to provide infinite procedurally generated scenes, volumes, and geometry which bypass meshes and volumes. With Vectron you can create procedurally generated scenes entirely on the GPU without using GPU VRAM and with zero memory footprint. In this article, let’s figure out Octane Vectron.

You can find many available Vectron objects from Live Viewer > Objects > Vectron. Vectron objects are generated from OSL scripts, which can be seen and editted in the edit field of the script group. You can also load an external script (in that case, the code for the Vectron object will not be visible). Having access directly to the script allows for modifications as needed.

Select the Vectron object in the Cinema 4D Object Manager, and then choose the Code Group tab in the Attribute manager:

A new Vectron object will have an OSL script with the following lines of code:

You can create a simple sphere using this script. A little extra coding, as in the image below will get you the result that follows:

You can download the example of the Vectron node in the image above to see it in action here: VectronSphere.orbx 

You can also download a collection of Vectron examples here: Fun_With_Vectron (4).orbx

Vectron can perform boolean operations on SDF primitive objects. You can go to Live Viewer > Objects > Vectron > Operators to access the Vectron booleans, and choose the desired operation from the list in the menu. This will then add a VectronOp object to the Object manager.

Next, you can load in two SDF primitives as operands and parent to the VectronOP node.

The VectronOp node or object contains the following options to manage the resulting boolean operation:

• • • • (Operation) Type — This menu contains a list of the following boolean operations supported by Vectron:
        • • • Union— Joins the two operands together as one object
            • Subtraction— Subtracts the second operand from the first operand
            • Intersect— Leaves just the portion of both operands that are shared with each other
            • Offset— Will expand or shrink all faces of the first operand to the extents specified by the bounds (the second operand is ignored in this case.)
            • Inset— Creates an inset of the first operand as revealed by the second operand. Blending between the two operands is controlled by the Radius attribute. Many unusual shapes can be created with this operation.
            • Ink— Will create a shape where the two operands intersect, but leaves the first operand in place.
            • Clip— This operation will remove any portion of the operand behind a clipping plane.
      • Radius— The boolean operation will consider only the items within the Radius specified.
      • Bounds— The overall bounds of the boolean realm. Anything outside of these bounds will not be drawn or generated.
      • Transfer Materials— This toggle enables the transfer of materials between operands (transferring material from the second operand to the common portions resulting from the boolean operation.

Any SDF object parented to the VectronOp becomes an operand. There are one or two operands are supported (if more operands are present, the results may not be predictable). You should choose the shape of the operand from the Object Type menu, and depending upon that, different options will appear.

The Operator section harkens back to the VectronOp, and the Radius parameter is the same as the VectronOp Radius parameter.

Some of the available Vectron boolean operations

Above is an example of an SDF sphere subtracted from a Menger cube.

Samples from shadertoy.com being fed into the OSL vectron geometry node. This example was copied from the Octane Standalone script and pasted into the Vectron Object in Cinema 4D.

There are several preset scripts included with the Vectron object:

• • • • fractal1.txt
      • glsl_type.h
      • mandelbulb.txt
      • mandelbulb2.osl
      • mandelbub_clay_test
      • menger_sponge_boolean_extract.txt
      • metaball1.txt
      • primitives.txt
      • QuaternionJulia.osl
      • sdf_to_vectron_surface_displacement.txt
      • sphere.osl
      • sphereWithtexture.txt — This script uses a noise texture input. Be sure to add a projection node and set the projection to UVW to XYZ
      • sponge.txt
      • temporal_mandelbulb.txt — In order to see the result of this script, adjust the bounds values located in the Object Parameters group. Large values will be necessary.
      • Vectron Procedural Waves (slow).txt — Generates a plane with a wave texture.
      • vectron_fur_fast.txt
      • vectron_fur_with_motion_blur.txt

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Source and images: docs.otoy.com