add depth to world position

[IceSentry]

Objective

• Add a function to convert the depth to a world position

[github-actions]

The generated examples/README.md is out of sync with the example metadata in Cargo.toml or the example readme template. Please run cargo run -p build-templated-pages -- update examples to update it, and commit the file change.

[github-actions]

The generated examples/README.md is out of sync with the example metadata in Cargo.toml or the example readme template. Please run cargo run -p build-templated-pages -- update examples to update it, and commit the file change.

[superdump]

I think these should be called position_ndc_to_world or view. Perhaps with ordering of grammar in the function names aligning with the mesh functions as I don’t remember if normal or tangent were prefixes or suffixes. And maybe we want to add some ndc_depth_to_view_z as that is often useful. There are more optimised ways of doing that for specific projections and we could implement that, plus a shader def to make it work for any projection.

[alice-i-cecile]

The depth_to_world_position conversion logic seems very useful, even if you're not using PBR-style graphics. Is there a more general home for it?

[alice-i-cecile]

Closing in favor of #9726.