houdini-constraints

name	houdini-constraints
description	Pipeline skill — typed animation constraint tools for object-level transform constraints. Create parent, blend, position, and orientation constraints using OBJ-level blend nodes and CHOP-driven channel referencing. List and delete existing constraints.
license	MIT
compatibility	dcc-mcp-houdini 0.1+, Houdini 20.5+, dcc-mcp-core 0.19.45+
allowed-tools	Bash Read Write Edit
metadata	{"dcc-mcp":{"dcc":"houdini","layer":"domain","stage":"pipeline","version":"1.0.0","tags":["houdini","constraints","parent","blend","position","orient","animation","pipeline"],"search-hint":"constraint parent blend position orient transform animation list delete","tools":"tools.yaml"}}

houdini-constraints

Typed animation constraint tools for agents. All tools are affinity: main.

Constraints are implemented via OBJ-level blend nodes (the idiomatic Houdini equivalent of Maya-style parent/position/orient constraints) and CHOP-driven channel referencing for finer control.

Tool groups

• parent: create_parent_constraint — drive an object's full transform from a single target.
• blend: create_blend_constraint — blend between multiple target transforms with per-target weights.
• position: create_position_constraint — constrain only translation channels.
• orientation: create_orient_constraint — constrain only rotation channels.
• inspect: list_constraints — list constraint nodes/relationships in the scene.
• manage: delete_constraint (destructive) — remove a constraint node.

Tracer-bullet flow

1. create_parent_constraint(driven_path="/obj/geo2", target_path="/obj/geo1")
2. list_constraints(context_path="/obj") → verify the blend node exists
3. create_blend_constraint(driven_path="/obj/geo3", target_paths=["/obj/geo1", "/obj/geo2"], weights=[0.3, 0.7])
4. delete_constraint(node_path="/obj/blend_geo2")

Position/orient constraints use CHOP extraction to isolate transform components, giving more granular control than a full parent constraint.