karl-zylinski

// Odin + Box2D + Raylib example with stacking boxes and a shape attached to the cursor that can smack the shapes.
// Made (mostly) during this stream: https://www.youtube.com/watch?v=LYW7jdwEnaI

// I have updated this to use the `vendor:box2d` bindings instead of the ones I used on the stream.

package game

import b2 "vendor: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

karl-zylinski

// from https://odin-lang.org/docs/overview/#when-statements, see end of that section

package main

import "core:fmt"
import "core:mem"

main :: proc() {
	when ODIN_DEBUG {
		track: mem.Tracking_Allocator

karl-zylinski

package assets_builder

import "core:fmt"
import "core:os"
import "core:strings"
import "core:path/slashpath"
import "core:hash"

dir_path_to_file_infos :: proc(path: string) -> []os.File_Info {
	d, derr := os.open(path, os.O_RDONLY)

karl-zylinski

{
    "selector": "source.odin",
    "file_regex": "^(.+)\\(([0-9]+):([0-9]+)\\) (.+)$",
    "file_patterns": ["*.odin"],
    "cmd": ["build.bat"],
    "working_dir": "c:/repos/cat-game",
    "variants": [
        {
            "name": "run",
            "cmd": "build.bat && start run.bat",

karl-zylinski

// Handle-based array. Used like this:
// 
// Entity_Handle :: distinct Handle
// entities: Handle_Array(Entity, Entity_Handle)
//
// It expects the type used (in this case
// Entity) to contains a field called
// `handle`, of type `Entity_Handle`.
//
// You can then fetch entities using

karl-zylinski

[EditorTool("Tile Placer Tool", typeof(TileData))]
class TilePlacerTool : EditorTool
{
    private GUIContent m_iconContent;

    void OnEnable()
    {
        var icon = AssetDatabase.LoadAssetAtPath<Texture2D>("Assets/Textures/Editor/TileEditorIcon.png");

        // Icon for tools toolbar

karl-zylinski

// D3D12 single-function triangle sample.
//
// Usage:
// - copy SDL2.dll from Odin/vendor/sdl2 to your project directory
// - odin run .
//
// Contributors:
// - Karl Zylinski <[email protected]> (version 1, version 3)
// - Jakub Tomšů (version 2)
//

karl-zylinski

# Linearly propagates the error of a velocity given in celestial coordinates to cartesian via the
# formulas identical to the ones in function cartesian_velocity_from_celestial.
def celestial_coords_to_cartesian_error(
            ra, dec, r,
            ra_error, dec_error, r_error,
            pmra, pmdec, rv,
            pmra_error, pmdec_error, rv_error):
    dvx_dra = -cos(dec)*sin(ra)*rv + r*cos(dec)*cos(ra)*pmra - r*sin(dec)*sin(ra)*pmdec
    dvx_ddec = -sin(dec)*cos(ra)*rv - r*sin(dec)*sin(ra)*pmra + r*cos(dec)*cos(ra)*pmdec
    dvx_dr = cos(dec)*sin(ra)*pmra + sin(dec)*cos(ra)*pmdec

karl-zylinski

# propagates error of |v2 - v1| where v2 and v1 are vectors and parameters are in celestial coordinates
def celestial_magnitude_of_velocity_difference_error(
            ra1_deg, dec1_deg, r1,
            ra1_error_deg, dec1_error_deg, r1_error,
            pmra1_deg_per_s, pmdec1_deg_per_s, rv1,
            pmra1_error_deg_per_s, pmdec1_error_deg_per_s, rv1_error,
            ra2_deg, dec2_deg, r2,
            ra2_error_deg, dec2_error_deg, r2_error,
            pmra2_deg_per_s, pmdec2_deg_per_s, rv2,
            pmra2_error_deg_per_s, pmdec2_error_deg_per_s, rv2_error):