Mark Lorenz markjlorenz

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	CMRotationMatrix rotationMatrixFromGravity(float x, float y, float z)
	{
	// The Z axis of our rotated frame is opposite gravity
	vec3f_t zAxis = vec3f_normalize(vec3f_init(-x, -y, -z));

	// The Y axis of our rotated frame is an arbitrary vector perpendicular to gravity
	// Note that this convention will have problems as zAxis.x approaches +/-1 since the magnitude of
	// [0, zAxis.z, -zAxis.y] will approach 0
	vec3f_t yAxis = vec3f_normalize(vec3f_init(0, zAxis.z, -zAxis.y));

	#!/usr/bin/env ruby
	#/ Usage: <progname> [options]...
	#/ How does this script make my life easier?
	# ** Tip: use #/ lines to define the --help usage message.
	$stderr.sync = true
	require 'optparse'

	# default options
	flag = false
	option = "default value"

	# Is there a coffeescript way of doing this?

	(function($, exports){
	# doing random stuff here
	})(jQuery, window);

	# Other than this:

	( ($, exports) ->
	# doing random stuff here