Type Alias: VolumeTextureMutability
VolumeTextureMutability:
"fixed"|"owned"
Whether the grid of a texture can change.
The two kinds have different lifetimes and different owners.
fixed— the grid never changes. Any number of viewports read the texture, and nothing needs to know when a draw starts or stops.owned— the basis point of the grid moves. An oblique MPR slab follows the camera, and the code re-points the slab instead of building a new texture for each position. Exactly one owner holds such a texture, because the owner is the only party that knows when a draw starts and stops. An owner may later be a set of viewports; it is never "whoever asks".