Martin Beierling-Mutz embiem

Full-Stack Developer. TS/JS, Go & a bit of gamedev in Godot.

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embiem / UE4 Get Look Direction

Created June 24, 2016 07:24

A function to get the look rotation by supplying it with a screen location (e.g. half the viewportSize, to use the middle of the screen). Useful for crosshairs

	bool GetLookDirection(FVector2D ScreenLocation, FVector& LookDirection) const
	{
	FVector CameraWorldLocation;
	return DeprojectScreenPositionToWorld(
	ScreenLocation.X,
	ScreenLocation.Y,
	CameraWorldLocation,
	LookDirection
	);
	}

embiem / UE4 Raycast Through ScreenPos

Created June 24, 2016 08:16

	bool GetSightRayHitLocation(FVector& HitLocation) const
	{
	// Find crosshair position in pixel coordinates
	int32 ViewportSizeX, ViewportSizeY;
	GetViewportSize(ViewportSizeX, ViewportSizeY);

	FVector2D ScreenLocation = FVector2D(ViewportSizeX * CrossHairXLocation, ViewportSizeY * CrossHairYLocation);

	// "De-project" the screen position of the crosshair to a world direction
	FVector LookDirection, LookStartLocation;

embiem / cartpole_qlearner.py

Created February 9, 2017 11:14

OpenAI Gym Q-Learner for the cartpole environment

	'''
	Very basic Q-Learner that is tailored for the cart-pole environment.

	This implementation leaves a lot of space for improvements.
	'''

	import gym
	from gym import wrappers

	import math

embiem / TagInput.css

Created April 20, 2017 13:50

TagInput-Component for React

	.tags-input {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	align-content: flex-start;
	justify-content: center;
	}
	.tags-input .tag-entry {
	user-select: none;
	cursor: pointer;

embiem / Logger.js

Created May 5, 2017 12:14

Custom logging via ES6 class. Extendable.

	class Logger {
	constructor() {
	if (!Logger.instance) {
	Logger.instance = this;
	}
	return Logger.instance;
	}

	log(...args) {
	console.log(...args);

embiem / AdobeButton.js

Created June 23, 2017 08:06

Adobe App-styled button as a React Component

	import React, { Component } from 'react';

	import './AdobeButton.css';

	/**
	* Adobe-Style button
	*/
	class AdobeButton extends Component {
	render() {
	const { text, onClick } = this.props;

embiem / codelabs_spider.py

Last active August 27, 2020 09:33

Scrapy Spider that scrapes Google's Codelabs for Category, Description, Link, Last Updated, Duration and Tags.

	import scrapy

	class CodelabsSpider(scrapy.Spider):
	name = "codelabs"

	def start_requests(self):
	urls = [
	'https://codelabs.developers.google.com/'
	]
	for url in urls:

embiem / DynamicScale.cs

Created July 5, 2017 11:39

Stretch object based on its speed and movement direction (original by @_pikopik https://twitter.com/_pikopik/status/882346033656844288) #Unity

	using UnityEngine;

	[ExecuteInEditMode]
	public class DynamicScale : MonoBehaviour
	{
	Vector3 lastPosition;

	void Start()
	{
	lastPosition = transform.position;

embiem / Lane.cpp

Last active August 26, 2020 02:53

Equally distributed Spline Mesh in UE4

	// Used further down in the OnConstruction call to set values on one spline mesh
	void ALane::BuildTrackElement(int32 atDistance, USplineMeshComponent* SplineMesh, UStaticMesh* LaneElementMesh, ESplineMeshAxis::Type LaneElementMeshForwardAxis)
	{
	FVector currLocation, currTangent, nextLocation, nextTangent;

	currLocation = SplineComponent->GetLocationAtDistanceAlongSpline(atDistance, ESplineCoordinateSpace::Type::Local);
	currTangent = SplineComponent->GetTangentAtDistanceAlongSpline(atDistance, ESplineCoordinateSpace::Type::Local);

	nextLocation = SplineComponent->GetLocationAtDistanceAlongSpline(atDistance + MeshSpacing, ESplineCoordinateSpace::Type::Local);
	nextTangent = SplineComponent->GetTangentAtDistanceAlongSpline(atDistance + MeshSpacing, ESplineCoordinateSpace::Type::Local);

embiem / generate_local_ssl.bat

Created September 14, 2017 19:50

modified OpenSSL config & batch file to generate self-signed certificate for Twitch extension development

openssl req -newkey rsa:4096 -days 1001 -nodes -x509 -subj "/C=US/ST=California/L=San Francisco/O=Twitch/OU=web/CN=localhost" -extensions SAN -config ".\openssl.cnf" -keyout "testing.key" -out "testing.crt"

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