Purpose

This PR is to update the Helix Toolkit (and by association the Cyotek.Drawing.BitmapFont dependency) from version 2.11 to version 2.15. The purpose of this PR is to address a memory optimization related to the #11395 PR (Generating a single render package per node). Specifically the helix-toolkit/helix-toolkit#1494 PR modifies the behavior of the VertexArrayBuffer which was being retained in memory as a sparse array based on the largest size mesh to be rendered in the session. In 2.15 this buffer is not pinned to the largest allocation size in session.

As a point of interest. This Helix PR fix was triggered due to the issue filed by @aparajit-pratap. helix-toolkit/helix-toolkit#1449

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Reviewers

@aparajit-pratap @mmisol

FYIs

@mjkkirschner