JoshuaSullivan

//
//  ColorCubeHelper.swift
//
//  Created by Joshua Sullivan on 10/01/16.
//  Copyright © 2016 Joshua Sullivan. All rights reserved.
//

import UIKit
import Accelerate

JoshuaSullivan

//: # Challenge Accepted #49
//: ## WUnderground API Client
//: ### Version 2.0
//:
//: Implement the networking layer for the Umbrella weather app(iOS or Android),
//: using a similar architecture to the one demonstrated in the first episode of Swift Talks.
//:
//: - note:
//: This is my updated solution to the challenge which demonstrates a more powerful and flexible
//: approach to customizing the request sent to the API through the use of closures rather than

JoshuaSullivan

//
//  ColorCubeImageCreator.swift
//  ColorCubeImageCreator
//
//  Created by Joshua Sullivan on 4/25/16.
//  Copyright © 2016 Joshua Sullivan. All rights reserved.
//

import UIKit

JoshuaSullivan

//
//  ViewController.swift
//  MetalCoreImage
//
//  Created by Joshua Sullivan on 4/21/16.
//  Copyright © 2016 The Nerdery. All rights reserved.
//

import UIKit
import MetalKit

JoshuaSullivan

import Swift

/// This method returns half of the input value if the number is even. It returns nil if the number is odd.
func evenHalfOrNil(input: Int) -> Int? {
    if (input % 2 == 0) {
        return input / 2
    } else {
        return nil
    }
}

JoshuaSullivan

static float FOCAL_LENGTH = 200.0;
static float ORBIT_RADIUS = 180.0;
static int SPARK_COUNT = 200;

class Spark {
  color clr;
  float orbitRadius;
  float rx, ry, rz, drx, dry, drz;
  Spark(color c, float orbitRadius) {
    this.clr = c;

JoshuaSullivan

class SingleWave {
  
  float SEGMENTS_PER_CYCLE = 48.0;
  
  float wavelength, r, dr;
  color drawColor;
  
  SingleWave(float wavelength, color drawColor) {
    this.wavelength = wavelength;
    this.drawColor = drawColor;

JoshuaSullivan

class TouchCaptureControl: UIControl {
    var value: CIVector = CIVector(x: 0.0, y: 0.0)
    
    @IBInspectable var horizontalMinimumValue: CGFloat = 0.0
    @IBInspectable var horizontalMaximumValue: CGFloat = 1.0
    @IBInspectable var verticalMinimumValue: CGFloat = 0.0
    @IBInspectable var verticalMaximumValue: CGFloat = 1.0
    
    @IBInspectable var flipHorizontalAxis: Bool = false
    @IBInspectable var flipVerticalAxis: Bool = false

JoshuaSullivan

// Improved Noise - Copyright 2002 Ken Perlin.
// Adapted and updated for iOS by Joshua Sullivan, 2016.01.12

// Apply the function 6t^5 - 15t^4 + 10t^3
float fade(float t)
{
    return t * t * t * (t * (t * 6.0 - 15.0) + 10.0);
}

// I'm keeping this around for reference.

JoshuaSullivan

// This works.
kernel vec4 simpleFilter(sampler p)
{
  vec2 dc = destCoord();
  return sample(p, samplerTransform(p, dc));
}

// This does not. It produces [0, 0, 0, 255] for the first 255 pixels and then [0, 0, 0, 0] thereafter.
kernel vec4 simpleFilter(sampler p)
{