Vec3BinaryCondition

Same job as CM_Vec2BinaryCondition, one dimension up: compare two three-component vectors and get true or false back. Vec3BinaryCondition is for the graphs that carry a value as an X/Y/Z triple instead of a flat pair - an RGB color, a 3D position, a rotation, anything with three linked numbers that should travel together.

It's part of ComfyMath, evanspearman's math/logic pack. ComfyMath's own README lists full Vec3 (and Vec4) arithmetic and functions as part of the pack's feature set, but this equality check is the only Vec3 node covered here - if you need more Vec3 operations (addition, scaling, and so on), check ComfyUI Manager's node list for the rest of what the pack ships.

How it works

Feed it a and b, both VEC3 (each defaulting to [0, 0, 0]), pick an op - Eq or Neq - and it compares all three components and returns a boolean. Same two operations, same mechanics as the VEC2 version: exact, component-wise comparison, not a "close enough" match.

That last point matters more here than with Vec2, if anything - three floating-point components each carry their own chance of rounding drift if either vector arrived via computation rather than as a literal value. If an Eq check is coming back false for two vectors that print as identical, that's the first thing to suspect.

Inputs and outputs

• op - Eq or Neq.
• a (VEC3, default [0, 0, 0]) and b (VEC3, default [0, 0, 0]) - the two vectors being compared.
• Output: BOOL - ComfyMath's own boolean type.

How to install it

Through ComfyUI Manager: search ComfyMath, install, restart. Manually:

cd ComfyUI/custom_nodes
git clone https://github.com/evanspearman/ComfyMath.git

then restart ComfyUI. No dependencies, no models - plain Python, nothing else to set up.

Common issues & troubleshooting

Two "identical-looking" vectors compare as not equal. Almost always floating-point rounding from upstream math on one side or the other, not a bug in this node. Exact equality on computed floats is fragile by nature - if you need a tolerance-based comparison instead of exact equality, you'll need to build that check yourself out of the pack's other float/vector operations, since this node only does exact Eq/Neq.

The BOOL output won't wire into a native switch node. This outputs ComfyMath's own BOOL type, not ComfyUI's built-in BOOLEAN. Route it through logic that accepts BOOL, or reach for one of ComfyMath's BOOLEAN-outputting nodes if a specific downstream target requires the native type.

Missing node error on a shared workflow. Install ComfyMath via Manager as above, then reload.

You expected more Vec3 nodes than this. This article covers just the equality check; ComfyMath's README advertises fuller Vec3 arithmetic in the pack, so browse Manager's node list under this pack if you need addition, scaling, or other Vec3 operations beyond comparison.

The pack looks unmaintained. A 2024 community thread noted the author had stepped back from active development. The Vec2/Vec3 side of ComfyMath is its least-used corner and has had little reason to change, so treat it as small and stable rather than actively developed.