Xue Yu KrisYu

Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);

iOS developer reading list

The best way to learn and master iOS development is to read the official documentation. It can be boring but you can trust its accuracy and the information will be presented without opinion.

Read documents in order where indicated.

Problem

There’s a chess board of size $N × N$, and an piece Knight, which has the initial position $(x, y)$.

Knight can step by going forward or backward two units in one direction, and one units in the other direction.

Find a way to position $(N, N)$ for this Knight piece.

	-(UIImage*)mmg_imageScaledToFitSize:(CGSize)fitSize
	{
	// Create a vImage_Buffer from the CGImage
	CGImageRef sourceRef = self.CGImage;
	vImage_Buffer srcBuffer;
	vImage_CGImageFormat format = {
	.bitsPerComponent = 8,
	.bitsPerPixel = 32,
	.colorSpace = NULL,
	.bitmapInfo = (CGBitmapInfo)kCGImageAlphaFirst,

	import Cocoa

	@IBDesignable
	class <#ClassName#> : NSView {

	override init(frame frameRect: NSRect) {
	super.init(frame: frameRect)
	commonSetup()
	}

	#!/usr/bin/env xcrun swift
	import Foundation

	let kDelayUSec : useconds_t = 500_000

	func DragMouse(from p0: CGPoint, to p1: CGPoint) {
	let mouseDown = CGEventCreateMouseEvent(nil, .LeftMouseDown, p0, .Left)
	let mouseDrag = CGEventCreateMouseEvent(nil, .LeftMouseDragged, p1, .Left)
	let mouseUp = CGEventCreateMouseEvent(nil, .LeftMouseUp, p1, .Left)

	###############################################################################
	# Helpful Git/GitHub commands and code snippets
	###############################################################################

	#### Remove/Squash All History on Master - CAUTION! ####
	# https://stackoverflow.com/a/26000395/580268
	git checkout --orphan latest_branch \
	&& git add -A \\
	&& git commit -am "Remove/squash all project history" \
	&& git branch -D master \

	// Thanks to http://www.labs.saachitech.com/2012/10/23/pdf-generation-using-uiprintpagerenderer
	// Note: including images in the HTML won't work, see here:
	// https://github.com/nyg/HTMLWithImagesToPDF

	import UIKit

	// 1. Create a print formatter

	let html = "<b>Hello <i>World!</i></b>"
	let fmt = UIMarkupTextPrintFormatter(markupText: html)

	// MARK: Using NSURLSession

	// Get first todo item
	let todoEndpoint: String = "http://jsonplaceholder.typicode.com/todos/1"
	guard let url = NSURL(string: todoEndpoint) else {
	print("Error: cannot create URL")
	return
	}
	let urlRequest = NSURLRequest(URL: url)

	func resize(image: NSImage, w: Int, h: Int) -> NSImage {
	var destSize = NSMakeSize(CGFloat(w), CGFloat(h))
	var newImage = NSImage(size: destSize)
	newImage.lockFocus()
	image.drawInRect(NSMakeRect(0, 0, destSize.width, destSize.height), fromRect: NSMakeRect(0, 0, image.size.width, image.size.height), operation: NSCompositingOperation.CompositeSourceOver, fraction: CGFloat(1))
	newImage.unlockFocus()
	newImage.size = destSize
	return NSImage(data: newImage.TIFFRepresentation!)!
	}