colDetectionNode

Custom-node of collision detection part (expression node) of maya_expressionCollision.
Processing speed can be expected to improve.

Warning
Internal Use ID (0x7c001, 0x7c002) is used.

Nodes

There are two types of nodes of: input as vectors (colDetectionNode) or input as matrices (colDetectionMtxNode). These outputs are the same.

use colDetectionNode	use colDetectionMtxNode

Specification

	colDetectionNode	colDetectionMtxNode	expression node (maya_expressionCollision)
Supported Collider	- sphere - capsule - capsule2 - infinite plane	- sphere - capsule - capsule2 - infinite plane	- sphere - capsule - capsule2 - infinite plane - cuboid
Parent	required	required	optional
Ground Collision	✔	✔	✔
Scalable	-	✔	✔

Pre-built plug-ins

Pre-built colDetectionNode.mll in the plug-ins folder. Install to the appropriate Maya version and ready to use.

Build	Plug-in (*Click on "Download raw file" at the link.)
Maya 2020 Update 4 win64	download
Maya 2022 Update 5 win64	download
Maya 2023 Update 3 win64	download
Maya 2024 Update 2 win64	download

Performance

The following is the processing time for a single node when one each of sphere, capsule, and infinitePlane Collider is used, Iterations : 3, GroundCol : On.
On its own, colDetectionNode is faster, but colDetectionMtxNode may be faster as a result because it does not require decomposeMatrix, etc. 　

colDetectionNode	colDetectionMtxNode	expression node (maya_expressionCollision)
14.48us	26.12us	78.33us

The following image shows a processing time comparison of 100 nodes when 10 capsule2 colliders are used, Iterations: 3, and GroundCol: On.

Tested:

• Windows 11
• Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz
• 32GB RAM
• NVIDIA GeForce RTX 3060

Note

• Processing order of collider type cannot be changed.
• Too many colliders reduce accuracy.