MeshGeometrySystem

Creates and updates the THREE.js BufferGeometry on primitive mesh entities based on their MeshGeometryComponent kind and parameter values.

Overview

MeshGeometrySystem runs every frame and is responsible for:

Creating THREE.BoxGeometry, THREE.SphereGeometry, THREE.PlaneGeometry, THREE.CylinderGeometry, or THREE.CapsuleGeometry when an entity's MeshGeometryComponent is first seen or its kind changes.
Recreating the geometry when parameter values (dimensions, radius, height) change.
Assigning the geometry to the THREE.Mesh found via Object3DRef.
Disposing the previous geometry before replacing it to free GPU memory.

Component	Access
`MeshGeometryComponent`	Read (`kind`, `parameters`)
`Object3DRef`	Read (the live THREE.js mesh)

Kind	Parameters
`cube`	`width`, `height`, `depth`
`plane`	`width`, `height`
`sphere`	`radius`
`cylinder`	`radiusTop`, `radiusBottom`, `height`
`capsule`	`radius`, `height`

Parameter sanitization — all dimension values are clamped to a minimum (0.01 for dimensions, 0.001 for radii). Non-finite values fall back to component defaults so an invalid inspector input never creates a degenerate geometry.
Signature-based change detection — per-entity signatures are compared each frame; the geometry is only rebuilt when the signature changes.
Geometry disposal — the previous BufferGeometry is disposed before the new one is assigned, preventing accumulated GPU memory usage when parameters change frequently.