Helpers: Clear procedural geometry before regenerating it


Otherwise attributes are appended on every property change and the
mesh stops rendering.

Pick-to: 6.12
Change-Id: Icf030a35c06d6b9abc7ef258a03c1c114c0d43ce
Reviewed-by: Christian Strømme <christian.stromme@qt.io>
commit6c9c72259d0a6aa9f009e3e98f6fb629ee977e4d
parentd680a70d68a52dbf84e7d848b614a671858154fb
authorAndy Nichols <andy.nichols@qt.io>
committerAndy Nichols <andy.nichols@qt.io>
commit timeThu, 15 Oct 2026 04:25:26 +0000