Houdini 17.0 Nodes VOP nodes

Point Cloud Iterate VOP node

This node advances to the next iteration point returned by pcopen.

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The pciterate VOP will either start a point iteration or advance to the next iteration point. The pciterate VOP should normally be used as input to a while loop condition, with Point Cloud Import operations inside the loop to gather iteration point information. The pciterate VOP corresponds to the pciterate VEX function.

You should usually iterate through all points in the point cloud. If you don’t iterate over all points, it is necessary to use the Point Cloud Close VOP to close the point cloud before other operations are performed in the shader.

Inputs

handle

The point cloud handle to be used for iteration.

Outputs

success

Returns 1 when the iteration was successful, in which case point data can be queried using pcimport.

Examples

PointCloudIterateAverage Example for Point Cloud Iterate VOP node

This example shows how the pciterate vop can be used to average together points returned by pcopen. First, a point cloud is generated with a floating point "check" channel initialized to 1 inside a circle in the x-z plane. Then, the points are filtered in a shader by looping using the pciterate vop and averaging the value of the "check" channel. The point cloud used in the example is stored inside the asset as points.pc.

PointCloudLookup Example for Point Cloud Iterate VOP node

This example shows how to accomplish point cloud lookups for volumes using pcfilter and pciterate. It demonstrates how to iterate over and import values returned by a query.

The following examples include this node.

PointCloudIterateAverage Example for Point Cloud Iterate VOP node

This example shows how the pciterate vop can be used to average together points returned by pcopen. First, a point cloud is generated with a floating point "check" channel initialized to 1 inside a circle in the x-z plane. Then, the points are filtered in a shader by looping using the pciterate vop and averaging the value of the "check" channel. The point cloud used in the example is stored inside the asset as points.pc.

PointCloudLookup Example for Point Cloud Iterate VOP node

This example shows how to accomplish point cloud lookups for volumes using pcfilter and pciterate. It demonstrates how to iterate over and import values returned by a query.

See also

VOP nodes