karl2d

This library is NOT ready for use!

Karl2D is a work-in-progress library for creating 2D games using the Odin Programming Language.

The API is based on Raylib because I like that API. But the implementation is meant to have as few dependencies as possible (only core libs and rendering APIs in vendor). The API will not be identical to Raylib. I'll modify to fit Odin better etc.

What features of Raylib will not be included?

• 3D
• Some maths things that can be found in Odin's core libs

Might not be included:

• Time management (use core:time instead)

TODO

Here follows my near-future TODO list

• basic text rendering

  • make draw_text and load_default_font do somethig more sensible
  • look at how to properly get the scale from stb_ttf
  • compare if we are doing the same as raylib by loading its default font and drawing some things, can we make it look similar?
  • font smoothing -> make it look crisp by disabling filtering on "pixel fonts"
  • next stage: Look into something more fancy than just loading bitmaps. What can we do?

• should gamepad come from separate interface than window?

  • keyboard input could also come from some input interface, but it is tightly bound to window in windows, so we'll see.

• add more window flags

• get_camera_view_matrix returns Mat4... should we go hardcore 2D and return Mat3 so you can do mat * Vec3{pos.x, pos.y, 1} for positions and mat * Vec3{dir.x, dir.y, 0} for dirs?

• win32: Gamepad support

  • check status of gamepad
  • what happens when you pull one out?
  • playstation

• Do proper checks of vertex count and dispatch rendering when full

  • What happens when list is full? We can't just empty the vertex list due to being used by input assembler etc.

• Should we sort by depth? Maybe we should use Vec3 because some 2D games rely on it?

  • I think we should.

• Textures: Make the sampler state configurable

• Textures D3D11: Do we need the SRV in the texture?

• Shaders: Reflect and expose samplers

• mipmap support

• set filtering: for scaling up, down and mipmap

DONE

• bunnymark
• win32: Resizable window
• Flashing textures in Abyss -- Better now but still flashes when you use nose... Check the "odd_frame" stuff in d3d backend
• Is the 1/zoom in set_camera wrong? Is the matrix multiply order wrong? Hmmmm...
• Fix the depedency on D3D stuff so we can move load_shader etc
• Shaders: Basic loading
• Shaders: Constants that you can set
• Shaders: Dynamic vertex creation
• Shaders: Feed extra vertex field values using some kind of context
  • Do we need one for all corners of a rect or possibilty to supply different value for the different corners?
• Group set_tex, camera etc into a section of things that cause a render batch dispatch when changed.
• Make a texture for drawing a rectangle and remove the hack in shader.hlsl
• Load textures and somehow bind to shader -- split draw calls on texture switch -- needs a start of a batch system.
• Make 0, 0 be at top left (should vertex data be flipped, or is it a transformation thingy?)
• Construct vertex buffer from k2.draw_blabla calls. Do we need index buffer? 🤷‍
• Organize the d3d11 things neatly. It's just a hack right now!
  • enable debug layers
  • asserting on hresult and checking errors
  • clean up on shutdown