Check usage of mesh-operations and replace with scaling when possible

Methods like SphereMesh::set_radius create all mesh data new on call. This could be significantly more expensive than just scaling the mesh instance.

Additionally, checks that prevent changes of meshes every frame could be reworked to be less prone to be circumvented by floating-point inaccuracy.

changed the description

added status::todo label

assigned to @jp_mathes

added status::doing label and removed status::todo label

created branch 144-check-usage-of-mesh-operations-and-replace-with-scaling-when-possible to address this issue

mentioned in merge request !45 (merged)

added status::report label and removed status::doing label

closed