Utility functions

utility functions that help you by having to write less. A lot of these are inspired by p5.js but luckily here you don't have to use them in the setup or draw functions

map(val, start1, stop1, start2, stop2)
works the same as in p5.js, maps a value from 1 range to another

min(a, b)
returns smallest of the two

max(a, b)
returns largest of the two

clamp(val, min, max)
returns the clamped value

inRange(min, max, val)
returns true if val is inbetween min and max or on top of them

rangeContain(a1, a2, b1, b2)
returns true if the line a1,a2 totally encapsulates line b1, b2 or is right on top of it

create2DArray(vector, fill)
returns a 2D array filled with some value. vector specifies the size of the 2d array

getMousePos(canvas, evt)
returns the mouse position in vector form relative to the canvas. Also needs the mousedown or mouseup event.

createCanvas(x, y)
similar to the p5.js version creates a canvas with the specified size and appends it to the body element.

var obj = createCanvas(400,400);
var ctxt = obj.ctxt;
var canvas = obj.canvas

random(min, max)
same as in p5.js

randomSpread(center, spread)
creates randome values centered at center and with the specified spread

loop(callback) creates a rendering loop using the method requestAnimationFrame so it's faster than setinterVal. the callback also gets the delta time since last frame passed as a parameter.

mod(number, modulus)
replacements for javascripts % modulo operator. javascripts % only works with positive values so use this if you also need something that works with negative numbers

iter(number)
iter(ate) is a generator function and is supposed to be used in for...of loops. so instead of writing for(var i = 0; i < 10; i++) you can write for(var i of iter(10)). sadly doesnt save that much typing but atleast it looks a little neater

getMoveInput()
returns a 2D vector which corresponds to the wasd/arrow keys.

keys
contains a map with the state of all keys for example keys[87] returns true if the w key is pressed

getFiles(strings):Promise
returns a promise which can then be called like this.

getFiles(['http://localhost:8000/test.html']).then((values) => {
    console.log(values)
})