GPU Interop Example: RpResource Allocator

Example node showing how to allocate a CUDA-interoperable RpResource in a pre-render graph. The node allocates two new RpResources for the supplied prim which match the size of the array of points of the prim. One RpResource can be used to deform and render the prim, without actually mutating the input prim, while the other holds the original point values.

Installation

To use this node enable omni.graph.nodes in the Extension Manager.

Inputs

Name	Type	Descripton	Default
Prim Points (inputs:points)	float[3][]	The array of points of the input prim meshes.	[]
Prim Path (inputs:primPath)	token	The path of the prim for which we allocate a new RpResources.
Reload (inputs:reload)	bool	Setting this to true will force the reallocation of the RpResource. This should be used when changing the input prims.	False
Stream (inputs:stream)	uint64	The CUDA Stream used to order the CUDA commands scheduled by this graph execution.	0
Verbose (inputs:verbose)	bool	If true, the node will log detailed messages during the execution. Can negatively impact performance.	False

Outputs

Name	Type	Descripton	Default
Point Counts (outputs:pointCountCollection)	uint64[]	Point count for each prim being deformed. The size of the array is equal to the number of allocator nodes of this type found in the graph.	None
Prim Paths (outputs:primPathCollection)	token[]	Path for each prim for which a new RpResource was allocated. The size of the array is equal to the number of allocator nodes of this type found in the graph.	None
Reload (outputs:reload)	bool	If true, the RpResources will be reallocated during the node compute.	False
Resource Pointer Collection (outputs:resourcePointerCollection)	uint64[]	Pointers to the allocated RpResources. Two resources are allocated per prim: one for the rest positions and one for deformed positions.	None
Stream (outputs:stream)	uint64	The CUDA Stream used to order the CUDA commands scheduled by this graph execution.	None

Metadata

Name	Value
Unique ID	omni.graph.nodes.RpResourceExampleAllocator
Version	1
Extension	omni.graph.nodes
Has State?	False
Implementation Language	C++
Default Memory Type	cpu
Generated Code Exclusions	None
uiName	GPU Interop Example: RpResource Allocator
Categories	examples,graph:preRender
Generated Class Name	OgnRpResourceExampleAllocatorDatabase
Python Module	omni.graph.nodes