TODO.md - game - A "game" written from scratch in Rust

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[ ] Multiple rendering passes
- [ ] Effects using stencil buffer
[ ] Remove possible edge cases in ECS component storage
- [ ] A Query<()> yields all components. Should this be the behaviour?
[ ] Improve ECS component storage performance
- [ ] Give archetypes edges for faster component addition & removal
- [ ] Store components of the same kind in the same memory allocation (not boxed)
[ ] Investigate what happends when a entity has all of it's components removed.
[ ] Audio
[ ] Transparent/translucent models
[ ] Animations
[ ] Physics
[ ] Rotation (using quaternions)
[ ] Add support for entity tags in ECS framework
[ ] Make OpenGL resource (texture, VBO, VAO) structs not implement Drop. This will probably make some parts of the code cleaner
[ ] Add implementation of GJK algorithm for collision detection
[ ] Add a way to not have to check every collidable object for collision. Something like binary space partitioning would work
[ ] Figure out way to handle collision of small fast moving objects
[ ] Improve vertex code.
[ ] Add support for optionally rendering objects without a projection
[ ] Add shadow mapping
[ ] Use Blinn-phong lighting instead of phong lighting
[x] Support for multiple textures
[x] Non-hardcoded projection settings
[x] Model importing
[x] Multiple light sources
[x] Fix the ECS member crate "extension" example
[x] Make ECS framework use archetypes
[x] Add support for adding components to entities at runtime in ECS framework
[x] Add support for removing components from entities at runtime in ECS framework
[x] Add support for entity relationships in ECS framework
[x] Add component events (removal & addition) in ECS framework
[x] Make renderer not create new buffers each frame
[x] Remove position field from Camera component
[x] Add support for entities with no components
[x] Fix OpenGL warning "Vertex shader in program 3 is being recompiled based on GL state". It started at commit 526edc6f4cb5f29d17e2fe384e316236c033fccd. Fixed by c4686c2992417545e7a05a6a40ee9f1a8bbf3b96
[x] New texture IDs are created for no reason. Crashes when on texture ID 31
[x] engine::file_format:wavefront::obj::Obj::to_mesh seems to produce meshes with pointless vertex indices since it flat maps all face vertices