karl-zylinski

1: Introduction
1.1: Why learn Odin?
1.2: Overview
1.3: Installing the Odin compiler
1.4: If you get stuck
1.5: Let's go!

2: Hellope! A tiny program
2.1: Compile and run the code
2.2: Line-by-line

karl-zylinski

package runefun

import fmt "core:fmt"
import "core:unicode/utf8"

main :: proc() {
	str := "小猫咪"
	
	// i is the byte index
	for r, i in str {

karl-zylinski

package open_win32_window

import win "core:sys/windows"

main :: proc() {
	instance := win.HINSTANCE(win.GetModuleHandleW(nil))
	assert(instance != nil, "Failed to fetch current instance")
	class_name := win.L("Windows Window")

	cls := win.WNDCLASSW {

karl-zylinski

// extra things I add to hot reload script to make auto reload work

odin build file_version_builder
IF %ERRORLEVEL% NEQ 0 exit /b 1

file_version_builder.exe
IF %ERRORLEVEL% NEQ 0 exit /b 1

karl-zylinski

Rect :: struct {
	x: f32,
	y: f32,
	width: f32,
	height: f32,
}

cut_rect_top :: proc(r: ^Rect, y: f32, m: f32) -> Rect {
	res := r^
	res.y += m

karl-zylinski

refresh_padded_tileset :: proc() {
	if g_mem.tileset_padded.id != 0 {
		rl.UnloadTexture(g_mem.tileset_padded)  
		g_mem.tileset_padded = {}
	}

	ts_source := load_image(.Tileset)
	defer rl.UnloadImage(ts_source)
	tileset_height := ts_source.height / TileHeight

karl-zylinski

{
	"folders":
	[
		{
			"path": ".",
		},
	],
	"build_systems":
	[
		{

karl-zylinski

package game

import rl "vendor:raylib"
import "core:mem"
import "core:fmt"
import "core:encoding/json"
import "core:os"

Animation_Name :: enum {
    Idle,

karl-zylinski

// A small test program of me trying Odin + Box2D + Raylib
// Made during this stream: https://www.youtube.com/watch?v=LYW7jdwEnaI
// I used these bindings https://github.com/cr1sth0fer/odin-box2d download them and put them in a sub-folder "box2d" next to this file.
// Then you can build using `odin run .`

package game

import b2 "box2d"

import rl "vendor:raylib"

karl-zylinski

load_ttf_from_memory :: proc(file_data: []byte, font_size: int) -> rl.Font {
	font := rl.Font {
		baseSize = i32(font_size),
		glyphCount = 95,
	}

	font.glyphs = rl.LoadFontData(&file_data[0], i32(len(file_data)), font.baseSize, {}, font.glyphCount, .DEFAULT)

	if font.glyphs != nil {
		font.glyphPadding = 4