Chris Rorden neurolabusc

Notes

Create a command line target in xcode either in Swift or Obj-C. add a metal file to the project and copy and paste the respective code into each file.

	<!--
	Go to Line 153 for the start of Uniform Buffer Object related code and intro

	Prerequsite:

	You at least know what uniforms are in the context of WebGL
	and mininally understand the concepts involved in creating a square in WebGL
	-->

	<html>

	// adapted from intersectCube in https://github.com/evanw/webgl-path-tracing/blob/master/webgl-path-tracing.js

	// compute the near and far intersections of the cube (stored in the x and y components) using the slab method
	// no intersection means vec.x > vec.y (really tNear > tFar)
	vec2 intersectAABB(vec3 rayOrigin, vec3 rayDir, vec3 boxMin, vec3 boxMax) {
	vec3 tMin = (boxMin - rayOrigin) / rayDir;
	vec3 tMax = (boxMax - rayOrigin) / rayDir;
	vec3 t1 = min(tMin, tMax);
	vec3 t2 = max(tMin, tMax);
	float tNear = max(max(t1.x, t1.y), t1.z);

	#!/usr/bin/env bash

	# ~/.osx — http://mths.be/osx

	# Ask for the administrator password upfront
	sudo -v

	# Keep-alive: update existing `sudo` time stamp until `.osx` has finished
	while true; do sudo -n true; sleep 60; kill -0 "$$" \|\| exit; done 2>/dev/null &