- CIDocumentEnhancer
- CIGaborGradients
- CIKeystoneCorrectionCombined
- CIKeystoneCorrectionHorizontal
- CIKeystoneCorrectionVertical
Joshua Sullivan JoshuaSullivan
JoshuaSullivan
/ ColorCubeHelper-swift2.swift
Last active
April 17, 2024 10:48
Here are the Swift 2.3 and Swift 3.0 versions of the ColorCubeHelper class.
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| // | |
| // ColorCubeHelper.swift | |
| // | |
| // Created by Joshua Sullivan on 10/01/16. | |
| // Copyright © 2016 Joshua Sullivan. All rights reserved. | |
| // | |
| import UIKit | |
| import Accelerate |
JoshuaSullivan
/ core-image-filters-ios-13.md
Last active
March 19, 2024 15:17
An enumeration of iOS 13 Core Image filters.
JoshuaSullivan
/ mobius-ring.pde
Created
March 22, 2018 02:04
Processing script for rendering a Möbius Strip.
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| class MobiusRing { | |
| float majorRadius, minorRadius; | |
| int segments; | |
| PVector[] vertices; | |
| MobiusRing(float majorRadius, float minorRadius, int segments) { | |
| this.majorRadius = majorRadius; | |
| this.minorRadius = minorRadius; | |
| this.segments = segments; |
JoshuaSullivan
/ Grid.swift
Last active
December 19, 2023 17:16
A data structure representing a 2D grid of homogeneous values. Has methods for examining data geometrically and avoids out-of-range exceptions that are common when working with Arrays.
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| /// Represents a point on a grid. | |
| /// | |
| /// - Note: Instances of this type are not bound to any particular Grid and may be invalid depending on the size of the grid. | |
| /// | |
| public struct GridCoordinate: Equatable, Hashable, CustomStringConvertible { | |
| /// The column (East/West) position of this coordinate. | |
| public let x: Int | |
| /// The row (North/South) position of this coordinate. |
JoshuaSullivan
/ CoreImageFilterEnumeration.swift
Created
October 11, 2020 22:35
A Swift Playground that will enumerate the properties of all of the CoreImage filters.
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| import Foundation | |
| import CoreImage | |
| struct FilterInput { | |
| struct ValueRange { | |
| let minValue: Float | |
| let maxValue: Float | |
| let sliderMin: Float? | |
| let sliderMax: Float? |
JoshuaSullivan
/ midjourney-quickstart.md
Last active
July 29, 2023 20:55
Midjourney Quick-Start Guide
Midjourney is a commercial image generation and transformation AI service. Similar services include:
- DALL-E 2 (Microsoft)
- Nightcafe
- Stable Diffusion (Open Source)
Midjourney is a somewhat opinionated AI and tends to try to create "art". It has a very high level of coherence, which means elements in the resulting images tend to have natural relationships with a low level of glitches and random weirdness. In my opinion, Midjourney has much higher quality "out of the box", trouncing the competition unless the user is quite advanced at effectively utilizing both positive and negative prompt particles.
JoshuaSullivan
/ PerlinNoise.cikernel
Last active
July 10, 2023 22:51
My attempt at writing a Perlin Noise function.
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| // 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
/ display-link-combine-playground.swift
Created
November 10, 2019 00:14
This gist demonstrates how we can wrap CADisplayLink to get frame refresh events via a published stream rather than the traditional `target:selector:` methodology.
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| import UIKit | |
| import Combine | |
| /// This class wraps a `CADisplayLink` and exposes its callback as a Combine Publisher. | |
| /// | |
| class CombineDisplayLink { | |
| /// An object that includes timing information about the screen refresh. | |
| /// | |
| struct Tick { |
JoshuaSullivan
/ ColorCubeImageCreator-swift2.swift
Last active
April 25, 2023 16:45
The Color Cube Image Creator creates the specially formatted images needed to create data for the CIColorCube filter.
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| // | |
| // ColorCubeImageCreator.swift | |
| // ColorCubeImageCreator | |
| // | |
| // Created by Joshua Sullivan on 4/25/16. | |
| // Copyright © 2016 Joshua Sullivan. All rights reserved. | |
| // | |
| import UIKit |
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