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VfxPrimitiveAttachedMesh

Inheritance 3 ancestors · 1 sibling

Class Documentation

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A mesh primitive that draws the unit the effect is attached to.

Which mesh. When mMesh names a mesh that loads, that mesh is drawn. Otherwise, which is how most shipped attached meshes use it, the particle draws the unit's own skinned mesh: every skin instance the unit currently shows, posed with the unit's current bone transforms. The overlay therefore follows the unit's animation exactly, and is shaded with the emitter's texture, color and blend mode instead of the unit's own material. Each particle draws one more copy, so several particles stack several overlays.

Placement. mMesh.mLockMeshToAttachment decides what places the mesh:

  • Set: the mesh sits on the unit's attachment transform - its position and rotation, with its scale forced to 1 - combined with the emitter's transform and scaled by the particle's scale. The particle's own position and rotation are ignored, so the overlay stays on the unit wherever the particle moves. With no attachment, every particle's mesh collapses onto the emitter's origin and keeps only its scale.
  • Not set: the particle's own position and rotation place the mesh, combined with the emitter's transform.

Shipped data sets it on most attached meshes and never authors it as false.

Submeshes. The unit's own visibility decides what can show:

drawn = mSubmeshesToDrawAlways | (unitVisible & mSubmeshesToDraw)

mSubmeshesToDraw can only narrow what the unit currently shows, and an empty list keeps all of it. mSubmeshesToDrawAlways is added after the unit's mask, so it shows a submesh even while the unit hides it.

Properties

UseAvatarSpecificSubmeshMask

Bool = false
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Selects which of two visible-submesh masks the unit provides is used as unitVisible above. It changes nothing else. What distinguishes the two masks is not yet identified.