Houdini 16.5 Nodes VOP nodes

Point Replicate VOP node

The Point Replicate Procedural takes a number of input points and multiplies them, and processes the result using a CVEX script.

It is useful for when generating the required number of points, for a given scenario, is infeasible with SOPs. These scenarios include things such as ocean spray, dust clouds, or any other particulate material.

Parameters

Main

Point Object

The object to copy the source points from.

Attributes To Copy

A glob to indicate which point and detail attributes should be copied onto the target points.

Point Multiplier

How many points to create from each individual input point. This can be overridden on a per-point basis, by adding a 'multiplier' integer point attribute to the source point object.

Motion Blur

Specifies how the motion blur will be computed on the points.

No Motion Blur

Do not perform motion blur.

Compute sub-frame geometry (deformation)

Compute the point’s position by evaluating the geometry at sub-frame intervals. This can be problematic if the point count is changing frame to frame.

Use point velocity attribute

The point’s vector attribute v is used to extrapolate the motion of the point.

CVEX Operator

A path to a CVEX SHOP node. The point replicator will run this CVEX shader on each of the multiplied points. This script can be used to adjust the attributes on the points, as well as their position in space.

The point instancing CVEX shader can use the following globals:

Name

VEX Type

Description

P

vector3

The position of the multiplied point. This value can also be written to, to translate the multiplied point.

id

integer

ID of the source point of the multiplied point being processed. If the 'id' attribute already on the source object, it will be used. Otherwise the points be numbered in sequence.

pid

integer

The sub-index of each of the multiplied points. If a point on the source geometry is multiplied ten times, those multiplied points will have a pid value from 0 to 9. This value should be combined with id to create a unique identifier, for random generation, for each of the multiplied points.

You can use additional attributes of the points being instanced on. The available attributes are controlled by the Attributes To Copy parameter.

IFD Bounds

Bounding Box

The bounding box controls let you specify a bounding box for the referenced geometry. Only when this bounding box is "on screen" will mantra load the referenced geometry. You can set Bounding Box to No bounding box required, in which case mantra will always load the references geometry regardless. You can also specify the bounding box by referencing the SOP’s bounding box in the SOP Bounds parameter.

SOP Bounds

The geometry whose bounding box you want to reference.

Min Bounds

The minimum bounding box dimensions, when setting explicit bounds.

Max Bounds

The maximum bounding box dimensions, when setting explicit bounds.

VOP nodes