Houdini 16.5 Nodes VOP nodes

Point Cloud Open VOP node

This node opens a point cloud file and searches for points around a source position.

On this page

This VOP opens a point cloud file (.pc) and queues up access to the points centered around a certain location. The pcopen VOP invokes the underlying pcopen VEX function.

Inputs

file

The name of the file to load. Point cloud files use the .pc extension, but it is also possible to load geometry files as point clouds.

pchannel

The name of the channel in the texture which contains the position to be searched.

P

The query position. The search for points in the file will begin at this position.

nchannel

Optionally, a normal channel can be provided to restrict the point search to points whose normal aligns with the search normal N.

N

The query normal. Points with dot(N, Npoint) > cos(cone) will be queued, and unmatched points will be rejected.

radius

The maximum radius around P that should be searched. If you know that all query points will reside within a given radius, you can speed up the search by specifying the radius here.

maxpoints

The maximum number of points that will be returned.

cone

The maximum cone angle to be used when rejecting points given a search normal.

preload

A toggle to control whether the entire point cloud file is loaded into memory before performing searches. Disabling preloading will decrease performance but may improve memory use.

Outputs

handle

The point cloud handle, to be used as input for VOPs which use the point cloud such as pcfilter or pciterate.

See also

VOP nodes