🐷

Hamilton Greene SIRHAMY

🐷

Technomancer building Simple Scalable Systems

SIRHAMY / quaternionMultiplicationExample.cpp

Created March 17, 2016 01:04

Example of quaternion on quaternion multiplication using the C++ Eigen library.

	Eigen::Quaterniond MyWorld::quatMult(Eigen::Quaterniond q1, Eigen::Quaterniond q2) {
	Eigen::Quaterniond resultQ;
	resultQ.setIdentity();

	resultQ.w() = q1.w() * q2.w() - q1.vec().dot(q2.vec());
	resultQ.vec() = q1.w() * q2.vec() + q2.w() * q1.vec() + q1.vec().cross(q2.vec());

	return resultQ;
	}

SIRHAMY / quatValToConsole.cpp

Created March 17, 2016 00:11

Example showing how to print the vals of an Eigen::Quaterniond to the console

	Eigen::Quaterniond myQuaternion = someFuncThatReturnsQuaternionVals(exampleParam); //The Quaternion to print

	std::cout << "Debug: " << "myQuaternion.w() = " << myQuaternion.w() << std::endl; //Print out the scalar
	std::cout << "Debug: " << "myQuaternion.vec() = " << myQuaternion.vec() << std::endl; //Print out the orientation vector

SIRHAMY / MatrixSize.cpp

Created March 16, 2016 01:33

	Eigen::MatrixXdd m(5,4); //Creates a Matrix with 5 rows and 4 columns

	std::cout << "Rows: " << m.rows() << ", Cols: " << m.cols() << std::endl;
	//The above should print "Rows: 5, Cols: 4"

SIRHAMY / template.html

Created March 8, 2016 17:55

Use Mustache to insert field into template

	{{#tooltipText}}
	<span title="This is the tooltip text: {{tooltipText}}"></span>
	{{/tooltipText}}

SIRHAMY / package.json

Created February 26, 2016 01:48

Bad package.json - Trailing comma

	{
	"name": "fullstackreduxtutorialserver",
	"version": "0.0.1",
	"description": "",
	"main": "index.js",
	"scripts": {
	"test": "mocha --compilers js:babel-core/register --recursive",
	"test:watch": "npm run test -- --watch"
	},
	"babel": {

SIRHAMY / url_parse.py

Created February 24, 2016 01:25

Parsing URL Code - Cause why not?


	# -----------------------------------------------
	# This project should be completed using the
	# Python programming language.
	#
	# Problem:
	#----------
	# Please parse the following URL into parts:
	# http://www.vandyhacks.org/dostuff/now
	#

SIRHAMY / simulator.cpp

Created February 16, 2016 04:13

Euler Midpoint Step Example

	void Simulator::midpointStep(Eigen::Vector3d particle) {

	Eigen::Vector3d halfTimeStepChangeV = { 0, (mTimeStep * 0.5) * -9.8, 0 };

	particle.mVelocity[1] += halfTimeStepChangeV[1];

	particle.mPosition[1] += (mTimeStep * particle.mVelocity[1]);
	}

SIRHAMY / P5ResizeProblem.js

Created January 9, 2016 20:58

Example problem and solution for P5.js image quality issues arising from multiple calls to resize.

	var exImg;

	function preload() {
	exImg = loadImage("COMPUTER/FAKE.png");
	}

	function setup() {
	exImg.resize((windowHeight/exImg.height) * exImg.width, windowHeight);
	}

SIRHAMY / LongestCharSeq.java

Last active January 8, 2016 19:45

Finds and returns the longest sequence of consecutive characters (as per ASCII) in given string.

	public class LongestCharSeq {

	public String findLongest(String s) {
	StringBuffer result = new StringBuffer();
	s.toLowerCase();

	int lastChar = getAsciiVal(s.charAt(0)) - 1;

	StringBuffer currentSeq = new StringBuffer();
	for(int i = 0; i<s.length(); i++) {

SIRHAMY / ZeroesToTheRight.java

Created January 8, 2016 05:40

Short method that takes in an integer array and moves all the zeroes to the right-most indices.

	public static void zeroRightShift(int[] A) {
	if(A == null) return;

	int zeroPtr = A.length - 1;

	while(zeroPtr >= 0) {
	if(A[zeroPtr] != 0) break;
	zeroPtr--;
	}