bartwttewaall’s gists

bartwttewaall / CypherUtils.cs

Last active July 22, 2019 09:23

AES-256-CBC encryption / decryption with secret key and IV string with additional C# decrypt-only method

	using System;
	using System.IO;
	using System.Security.Cryptography;
	using System.Text;

	public class CypherUtils {
	public static string Decrypt (string cipherData, string keyString, string ivString) {
	byte[] key = Encoding.UTF8.GetBytes (keyString);
	byte[] iv = Convert.FromBase64String (ivString);

bartwttewaall / AWSDeploy.js

Last active July 22, 2019 09:24

AWS-SDK upload script, specially setup for uploading .unityweb files (gzipped webassembly files) which sets the correct content type

	/** You'll need to provide a .env file at the root folder containing an endpoint, bucket name and access credentials
	* # AWS_ENDPOINT=https://ams3.digitaloceanspaces.com
	* # AWS_ACCESS_ID=
	* # AWS_SECRET_KEY=
	* # AWS_BUCKET_NAME=
	*/

	const dotenv = require("dotenv");
	const fs = require("fs");
	const path = require("path");

bartwttewaall / Unity3D_InputFieldSetFocus.cs

Created July 22, 2019 08:39

Use Unity3D's EventSystem to set or unset focus on a UI element

	public TMP_InputField inputField;
	float focusReleaseTime;
	float focusReleaseCooldown = 0.1f;

	public bool HasFocus () {
	return EventSystem.current.currentSelectedGameObject == inputField.gameObject;
	}

	public void SetFocus (bool value) {
	if (value && !inputField.isFocused) {

bartwttewaall / Unity3d_SetCursor.cs

Created July 22, 2019 08:34

Set or unset a cursor with a pivot at the center (Crosshair texture is 64x64 px)

	if (player.canUseWeapons && current) {
	Cursor.SetCursor (Resources.Load<Texture2D> ("Crosshair"), new Vector2 (32, 32), CursorMode.Auto);
	} else {
	Cursor.SetCursor (null, Vector2.zero, CursorMode.Auto);
	}

bartwttewaall / Unity3D_UpdateFixedDeltaTime.cs

Created July 22, 2019 08:31

Update as many times in steps of fixedDeltaTime until we have caught up to the elapsed time

	float timer;

	void Update () {

	timer += Time.deltaTime;
	while (timer >= Time.fixedDeltaTime) {
	timer -= Time.fixedDeltaTime;

	// calculate single step
	// ..

bartwttewaall / PlayerInputState.cs

Last active July 22, 2019 09:25

Compress multiple boolean states into a single integer and unpack it on the server or vice versa

	using System;
	using UnityEngine;

	// https://dev.to/somedood/bitmasks-a-very-esoteric-and-impractical-way-of-managing-booleans-1hlf

	[Flags]
	public enum KeyFlags {
	UP = 1 << 0,
	DOWN = 1 << 1,
	LEFT = 1 << 2,

bartwttewaall / TriggeredInputTicker.cs

Last active July 22, 2019 09:30

A ticker / stopwatch class that keeps track of the activation and cooldown of a player's ability, like a shield.

	public abstract class AbstractTicker {

	public delegate void TickerEvent ();
	public delegate void TickerProgressEvent (float progress);

	public abstract void Tick (float time, bool input);
	}

	// Example
	// TriggeredInputTicker shieldTicker = new TriggeredInputTicker () { duration = 4, cooldown = 8 };

bartwttewaall / Unity3D_CullingMask-example.cs

Created July 22, 2019 08:05

Combining layers to define a cullingmask

	LayerMask everything = -1;

	void Start () {
	LayerMask uiMask = 1 << LayerMask.NameToLayer ("UI");
	cam.cullingMask = everything;
	cam.cullingMask &= ~uiMask; // exclude UI layer
	}

bartwttewaall / Unity3D_UrlEncoding.md

Created July 22, 2019 08:01

When you need to send a string to a backend but some characters are missing, chance is you need to URLEncode it

UrlEncoding

Sending a string over to the colyseus server through a Dictionary<string, object> can result in missing characters.

var options = new Dictionary<string, object> () {
  { "sessionTicket", WebUtility.UrlEncode(sessionTicket) }
};
room = client.Join<SK.Schemas.PvpGameState> (roomId, options);

bartwttewaall / Unity3D_AimReticle.cs

Created July 22, 2019 07:30

Position and rotate a reticle on the floor, at the feet of a player in the 3D direction we're aiming at a range from the center

	Transform aimTransform;
	float spriteOffsetY = 0.01f;
	float aimRange = 1.5f;

	// use incoming player.state.aimDirection to calculate the rotation and position of the reticle's aimTransform
	Vector3 aim = player.state.aimDirection.normalized;

	aimTransform.localPosition = new Vector3 (aim.x * aimRange, spriteOffsetY, aim.z * aimRange);
	float angle = Mathf.Atan2 (aim.x, aim.z) * (180 / Mathf.PI);
	aimTransform.rotation = Quaternion.Euler (90, angle, 0);

Bart Wttewaall bartwttewaall

UrlEncoding