A 2D animation library for Odin
Inspired by the LÖVE library anim8
This library is implemented to be renderer agnostic, however there is a raylib implementation available in anima/anima_raylib.
Copy the anima directory somewhere into your project as this is the package, feel free to delete the sub directories inside that you do not need like anima/anima_raylib if you for instance do not use raylib.
(You might also want to use git submodules)
Check out one of the examples:
- anim8 1945 example (port of the anim8 demo)
- cat fighter fsm - Animations with a finite state machine
package main // assuming you have the package located in a directory adjacent to the current package import "anima" import "anima/anima_raylib" import rl "vendor:raylib" main :: proc() { rl.InitWindow(800, 600, "Simple Example") defer rl.WindowClose() rl.SetTargetFPS(60) image := rl.LoadImage("path/to/image.png") texture := rl.LoadTextureFromImage(image) defer rl.UnloadTexture(texture) rl.UnloadImage(image) // first we need to define our grid grid := anima.new_grid(32, 32, texture.width, texture.height) animation := anima.new_animation( // here we specify we want column: 0-7 in row: 0 anima.grid_frames(&grid, "0-7", 0), // and the animation speed is 0.1s 0.1, ) // don't forget to clean up after yourself defer anima.destroy_animation(animation) for !rl.WhileWindowShouldclose() { dt := rl.GetFrameTime() // update the animation before drawing anima.update(animation, dt) rl.BeginDrawing() rl.ClearBackground(rl.RAYWHITE) // and finally draw the animation anima_raylib.draw(animation, texture, 100, 100) rl.EndDrawing() } }Grids exist to make it as easy as possible to quickly define animations using rectangles of the same size.
You can define a grid like this:
anima.new_grid( frame_width, // the width of the frame frame_height, // the height of the frame image_width, // the width of the image (or part of said image) from which we get the frame image_height, // the height of the image (or part of said image) from which we get the frame left, // (optional) starting x positon of our grid, this is used to define multiple grids within a single file top, // (optional) starting y position of our grid, this is used to define multiple grids within a single file, border, // (optional) this allows you to define gaps between images ) -> Grid {
(Took this explanation from the anim8 repo)
To get frames from a grid you need to call the anima.grid_frames procedure
anima.grid_frames( grid_ptr, // a pointer to our grid column_interval_range_0, // the defined column range of our animation row_interval_range_0, // the defined row range of our animation column_interval_range_1, // the defined column range of our animation row_interval_range_1, // the defined row range of our animation column_interval_range_2, // the defined column range of our animation row_interval_range_2, // the defined row range of our animation // .... this is a variadic function so this can take as many arguments as you want ) ### Animations Animations are a group of frames that change after a set duration ```odin animation := anima.new_animation( frames, // the frames to play, this should be supplied using grids duration, // the duration each frame will take until the next one will play playing, // (optional) is the animation playing? Default is true oneshot, // (optional) should the animation only play once? Default is false on_finished, // (optional) a callback that will be called every time the current animation has finished )new_animation returns a pointer to an animation so you also have to call
anima.destroy_animation(animation)after you are done with it.
The animation structs also has a flip_h and flip_v property in case you want to flip the sprite.
- examples/anim8_1945/assets/1945.png - Widgetworx Spritelib
- examples/cat_fighter_fsm/assets/cat_fighter.pn - dogchicken from opengameart.org
MIT
