Houdini 16.5 Nodes VOP nodes

Volume Sample VOP node

Samples the value of a volume primitive stored in a disk file.

Samples a specific volume primitive. Returns 0 if primnum is out of range, the filename is invalid, or the given primitive is not a volume primitive.

Examples

ParticleVolumeCollision Example for Volume Sample VOP node

This example demonstrates how to set attributes on a particle based on the value of a volume at the particle’s position.

To accomplish this, you can use a VOP POP to edit the particles, using the Volume Sample from File VOP to sample the volume.

In the example, particles are colored differently based on whether they are "in" or "out" of the volume, where "in" is defined in the example as "the value in the volume is > 0 at the position of the particle", but could easily be changed.

The following examples include this node.

2dfluid Example for Smoke Object dynamics node

Demonstrates exporting a 2d fluid into COPs where it can be saved to disk as a sequence of image files to then be used as texture maps, displacement maps, etc.

ParticleVolumeCollision Example for Volume Sample VOP node

This example demonstrates how to set attributes on a particle based on the value of a volume at the particle’s position.

To accomplish this, you can use a VOP POP to edit the particles, using the Volume Sample from File VOP to sample the volume.

In the example, particles are colored differently based on whether they are "in" or "out" of the volume, where "in" is defined in the example as "the value in the volume is > 0 at the position of the particle", but could easily be changed.

See also

VOP nodes