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This operation pushes selected geometry out from the center. It does so piece-by-piece to create an exploded view of the geometry. This can be very useful in visualizing how fractured geometry was broken up.
The geometry to push outwards.
The amount to expand the pieces. Each piece is moved proportionally to its distance to the center. A value of 1 will approximately double the size of the object. To undo an outwards scale of 1, an inwards scale of -0.5 can be used.
The center to push pieces out from is normally computed as the center of the bounding box of the input. This parameter lets you override that choice.
Controls how pieces to expand are detected. Auto-detect tries to use some heuristics to detect. It will first test if the group mask matches any primitive groups. If it does, it will use the group mask. It then tests to see if the piece attribute is present as a primitive attribute. If it is, that is used. Finally, it will perform its own connectivity calculation on primitives into a piece attribute and push out with that.
Groups matching this mask are treated as individual pieces.
Primitives with identical values of this attribute, as determined by the tolerance, become individual pieces.
The difference in piece attribute values before they are considered separate pieces.
The following examples include this node.
This example actually includes eight examples of ways that you can use voronoi fracturing in Houdini. In particular, it shows how you can use the Voronoi Fracture Solver and the Voronoi Fracture Configure Object nodes in your fracture simulations. Turn on the display flags for these examples one at a time to play the animation and dive down into each example to examine the setup.