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Since | 18.0 |

This operation pushes the geometry out from the center. It does so piece-by-piece to create an exploded view of the geometry. This can be useful in visualizing how fractured geometry was broken up, and how the hi-res geometry conforms to the proxy geometry. It also allows to replace the specified hi-res geometry’s proxy geometry representation either as convex decomposition or packed spheres.

## Visualizers

The RBD Exploded View also has a **Visualize** dropdown menu with different options, which lets you change the display of the pieces and constraints. This can be very useful for debugging.

**Geometry Outside Proxy**

Colors areas red where your geometry is poking out beyond the proxy geometry.

**Pieces**

Displays the fracture pieces in different colors.

**Volume**

Gives you a histogram of the volume distribution amongst the pieces.

Strength and stiffness constraints

Lets you visualize the strength values if you have glue constraints, and the stiffness values if you have spring constraints.

## Parameters

Uniform Scale

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.

Random Rotate

Applies a random rotation to the pieces.

Show Constraints

When on, the constraints will be attached to the exploded pieces.

Constraint Mode

Centroids

Constraints generated with the RBD Material Fracture SOP connect centroids together. This mode will snap the constraint points to the centroids of their corresponding piece.

Deform

Hinge and other types of constraints connect surface points together - in this case, this mode will give a more accurate representation of where they should connect pieces together.

Visualize

Creates various visualizers to help debug RBD pieces.

Constraint Stiffness

Displays the constraint stiffness values on the constraint geometry.

Constraint Strength

Displays the constraint strength values on the constraint geometry.

Geometry Outside Proxy

Displays the geometry outside the bounds of the proxy geometry in red.

Pieces

Displays the geometry name as a random color.

Volume

Displays the measured volume of the input geometry.

Offset

When visualizing geometry outside proxy, applies this offset to the proxy surface.

Modify Proxy Geometry

None

Do Nothing.

Convex Decomposition

Replaces the proxy geometry with a convex decomposition of the specified hi-res geometry.

Packed Spheres

Replaces the proxy geometry with packed spheres of the specified hi-res geometry.

Group

Specify the hi-res geometry to have its proxy geometry counterpart replaced with convex decomposition or packed spheres representation.

Max Concavity

The maximum distance from a point on the geometry to it’s closest convex hull edge. Reducing this value will produce convex hulls that are a closer fit to the input geometry, but the geometry may be split into more segments.

Merge Nearby Segments

After decomposing the geometry, attempt to merge nearby segments that can be combined without violating the Max Concavity. This can be useful for creating proxy geometry that encloses multiple segments.

Voxel Size

The size of voxels in the output VDB volume. Surface features smaller than this will not be in the output VDB.

Min Radius

Determines the smallest sphere size in voxel units.

Max Radius

Determines the largest sphere size in voxel units.

Max Spheres

No more than this number of spheres are generated per VDB primitive.

See also |