rapid 2020 - progress tracking

[liquidev]

Since rapid 2020 has now been merged to master, the checklist from #22 has been moved here:

• [ ] rapid/graphics
  • [ ] context.nim
  • [x] basic shapes
  • [x] polylines
  • [x] sprites
  • [x] text
  • [ ] extra shapes:
    • [ ] optimized arc outlines - right now (ac7187f) they use slow polyline rendering
    • [ ] rounded rectangles - fills and outlines
  • [x] postprocess.nim
• [ ] rapid/ecs will not be finished for 2020.1, rather separated into its own issue and developed there
  • [x] DSL for systems
  • [x] DSL for constructing the ECS world
  • [x] types: @entity, @world, @entityHas
  • [x] procs/iterators:
    • world creation: init@world won't be necessary, as just creating a zeroed World variable works fine,
    • [x] obtaining components: component, mcomponent,
    • [x] managing components: addComponent, delComponent, hasComponent,
    • [x] entity manager: new@entity, del@entity, iterator entities
  • [ ] common components
  • all ECS components must be named using the pattern Comp<name> stupid idea, components can be named however you want
  • [x] components/basic.nim – Position, Size, Color, etc.
  • [x] components/physics.nim – PhysicsBody (velocity, acceleration), Gravity, TerminalVelocity, etc.
  • [ ] components/graphics.nim – Sprite, shapes (?), etc.
  • [ ] components/tilemap.nim – Tilemap[T] (will need generic component and system support), TilemapPhysics
  • [ ] systems
  • all systems export their required components, so ultimately the user doesn't need to import any components
  • [ ] draw.nim – drawRect, drawSprite, etc.
  • [ ] physics.nim – physics, gravity, velocityCap, etc.
  • [ ] tilemap.nim – tilemapCollision
• [x] rapid/ec.nim - simpler object-oriented alternative to rapid/ecs based on the component pattern
• [x] rapid/physics - lightweight physics and collision-related stuff
• [ ] rapid/audio
  • will probably have the same (or similar) API but without the R prefixes
• [x] rapid/game.nim - fixed timestep game loop macro
• [ ] rapid/ui - replacement for rdgui, fidget-like API