Friday, 27 September 2019

The Tea Set

The Tea Set recently released their latest album Back in Time for Tea, and I thought I'd have a play with one of their old logos. I spent ages working out the SCSS mixin, but I'm pleased with the result.

This is the mixin and its usage:

$main-duration: 10s;
$base-percentage: 3%;

@mixin animate_movement($initial, $id, $main-duration, $delay, $duration) {
    $animation-name: unique-id() !global;
    @keyframes #{$animation-name} {
    
        0%, 
        #{$delay * $base-percentage} {
            transform: $initial;
        }
    
        #{($delay + $duration) * $base-percentage}, 
        100% {
            transform: translate(0px, 0px);
        }
    }
    ##{$id} {
        transform: $initial;
        animation: $animation-name  $main-duration linear infinite alternate;
    }
}

@keyframes scale-in-top {
    0% {
        transform: scale(0);
        transform-origin: 50% 0%;
        opacity: 1;
    }
    100% {
        transform: scale(3);
        transform-origin: 50% 0%;
        opacity: 1;
    }
}


.icon-holder {
    text-align: center;
    margin-top: 1em;
    svg {
        animation: scale-in-top 0.5s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
    }
    @include animate_movement(translateY(-88px), TheTeaSet, $main-duration, 1, 5);
    @include animate_movement(translateX(-16px), tHe, $main-duration, 9, 3);
    @include animate_movement(translateX(-32px), thE, $main-duration, 6, 6);
    @include animate_movement(translateX(-16px), tEa, $main-duration, 15, 3);
    @include animate_movement(translateX(-32px), teA, $main-duration, 12, 6);
    @include animate_movement(translateX(32px), Set, $main-duration, 18, 6);
    @include animate_movement(translateX(16px), sEt, $main-duration, 21, 3);
}

Monday, 23 September 2019

She said, he thought

This has been rattling around in my head for a while so I thought I'd best get it written. It's basically the reason why I shouldn't try relaxation.

She said, “Breath in,” then waited for my huge inhalation to finish and paused for a beat before saying, “breath out”. Again she waited for my chest to shrink, then my belly to implode, before again saying, “Breath in”, waiting while I inhaled and again pausing for a beat before telling me to exhale.

This repeated for about half a dozen times before she said, “Breath normally”. I did as I was told, but noted that my breathing was much deeper and slower than before.

She said, “Empty your mind”. Nice idea but utterly impossible. Or maybe not even a nice idea… where would I be without the whirling maelstrom of chaos rolling around in my head?

She said, “Imagine you’re walking through the grass...” So I did and wondered what the weather was like.

“It’s a warm and sunny day and you’re barefoot” Okay, I can live with that. I can live with it as long as there’s no dog shit on the grass… I guess there isn’t or this wouldn’t be relaxing… trying to avoid stepping in shit and then going for a Burton and landing on my arse would be a pain, especially if I managed to land in the shite.

“You step from the grass onto the sand by the sea.” Ah, bugger. It’s the grass like pampas grass, isn’t it? The stuff on dunes which is sharp as anything and likely to lacerate my feet, still, thankfully I’m in the sand now. Let’s hope there’s no dog shit or broken glass or some slimy seaweed in the sand now. That’d be just my luck, wouldn’t it? Perhaps I could slide on the seaweed and then manage to land in dogshit… and broken glass! When did I have my last Tetanus injection again?

“You step into the warm sea.” Where is this? It’s not local if the sea is warm… are there jellyfish or sea urchins here? Do I need sunscreen? She said it was warm before… I’ll get a burnt head!

“You see a rock standing in the sea.” A rock? How big is the rock? Are we looking at a pebble here or something more substantial? Am I gonna have to avoid it with my bare feet, as well as avoiding the jellyfish and sea urchins? It’s warm though, isn’t it? I’m sure she said it was warm… happen it’s Australia where everything is trying to kill you! There could be sharks or a manta ray - I’ll end up getting stuck on the tail of the manta ray, bleeding and then the sharks will come and I’ll be buggered! All while being covered in dog shit with a broken bottle stuck out my back!

“You climb the roc.k” Ah, it’s not a pebble, it’s a bit bigger! Wonder how big? Am I gonna be climbing for a while? I do hope not: I’m not as young as I once was and I’m not sure my belly will allow for any major climbing elegance… perhaps it’s the South China seas and the rock is like the island where Goldfinger had his super, secret weapon? That was huge though wasn’t it? I’ll be climbing all bloody day!

“You sit on the top of the rock.” OK, guess it’s not that big… something like that lass was marooned on when the sharks started circling… are the sharks here now, did I manage to cut my feet on the razor grass or broken glass, or are they attracted by dog shit in the water? Also, rocks aren’t all that comfortable, this is gonna kill my arse after a while. Am I even gonna be here a while, should I ask if I can put my hat on?

Monday, 29 July 2019

Been a busy boy

I've just had a busy old weekend and managed to get my digital counter working with CSS animations. I have been wanting to do this for ages but haven't had the time to research the technique correctly. It's here, and I'm quite pleased with the result despite it taking a shed load of tweaking to get right.

I've also caught up some on updated p5 implementations from WireFrame, and I've added three projects to the site hosted by GitHub, all to do with mazes. The first uses an algorithm to generate a maze, and I got lost in the C implementation but found a set of videos from The Coding Train that went through the steps required. I've pretty much stolen them but made them a little more ES6y. The second draws the view of a character navigating a maze, and I'm impressed with the cheating in terms of the images used to illustrate the perspective required. The third and final one also cheats by using images to build up a semi-3D illustration of a landscape and was lots of fun (you can navigate using the arrow keys)!

Friday, 31 May 2019

rgba2rgb

I had a lovely little challenge a couple of days ago which, in conjunction with my invite to the First Alpha Testing of Empire of Code, got me excited. It led me to generate the following chunk of code:

const rgba2rgb = rgba => "#" + rgba.match(/.{1,2}/g)
                             .map((c, i, a) => (i !== a.length -1) 
                                 ? parseInt(c, 16) 
                                 : parseInt(c, 16) / 255)
                             .map((c, i, a) => (i !== a.length -1) 
                                 ? ~~((1 - a[3]) * 255 + a[3] * c) 
                                 : null)
                             .reverse()
                             .slice(1)
                             .reverse()
                             .map(c => c.toString(16))
                             .join("");

We needed to convert an RGBA colour to RGB, with the assumption that the original colour was atop a white background. The maths and colour theory are a little confusing, and I went through any number of iterations. The result made me feel a bit smug though as it is teeny - I'm guessing it could be improved though.

Have at it!

EDIT

So I clocked that the above wasn't quite as brilliant as I thought so I've updated it after simplifying it:

const rgba2rgb = function(rgba){ 
 const coloursAsBase16 = rgba.match(/.{1,2}/g);
    console.log("coloursAsBase16", coloursAsBase16);
    const coloursAsBase10 = coloursAsBase16.map(function(c, i, a){ 
     if(i !== a.length - 1){
         return parseInt(c, 16) // Value between 1 - 255
        }else{
         return parseInt(c, 16) / 255 // Value between 0 - 1
        }
    });
    console.log("coloursAsBase10", coloursAsBase10);
    const coloursWithAlpha = coloursAsBase10.reduce(function(t, c, i, a){
     if(i !== a.length - 1){
         return t.concat([parseInt(((1 - a[3]) * 255 + a[3] * c), 10)]);
        }else{
         return t;
        }
    }, [])
    console.log("coloursWithAlpha", coloursWithAlpha);
    const coloursChangedToBase16 = coloursWithAlpha.map(function(c){
     return c.toString(16)
    });
    console.log("coloursChangedToBase16", coloursChangedToBase16);
 return "#" + coloursChangedToBase16.join("");
}

Which led to this one-liner:

const rgba2rgb = rgba => "#" + rgba.match(/.{1,2}/g)
    .map((c, i, a) => (i !== a.length - 1) 
        ? parseInt(c, 16) 
        : parseInt(c, 16) / 255)
    .reduce((t, c, i, a) => (i !== a.length - 1) 
        ? t.concat([parseInt(((1 - a[3]) * 255 + a[3] * c), 10)]) 
        : t, [])
    .map(c => c.toString(16))
    .join("");

Wednesday, 8 May 2019

lodash _.sortBy

I needed to order an array of objects in an arbitrary fashion, using strings which make sense to the business but aren't necessarily orderable otherwise. Unfortunately I had to support IE11, so couldn't do fancy JS. Thankfully I had access to lodash. Anyway, I came up with this:

var statuses = ["one", "two", "three", "four"];

var complexObj = {
    dataset: [
        {
            label: "two"
        },
        {
            label: "four"
        },
        {
            label: "three"
        },
        {
            label: "one"
        },
    ]
};

console.table(complexObj.dataset)

complexObj.dataset = _.sortBy(complexObj.dataset, function(n) {
  return _.indexOf(statuses, n.label);
});

console.table(complexObj.dataset)

Which worked a treat, once I'd clocked I need to return the sorted array rather than merely sort it.

Sunday, 5 May 2019

Op Art with p5

My Dad and I both love Op art, and he recently forwarded an email from Tumblr with this link. It piqued my interest as I'm playing with p5 an awful lot at the minute in my spare time as you'll see from previous posts.

So I got to it but clocked that there might be an issue in terms of masking the squares which make up the image. A little judicious playing with Gimp meant that I knew the graphic would be made up of multiple squares. The squares either started with a black or yellow background and they changed after a delay. To get around the issue of masking, I opted to use createGraphics() and then embed that graphic in the main body of the image using the image() function. I ended up making a simple error though, but Stack Overflow came to my rescue, and I'm quite pleased with the result:

The code, which is also up on GitHub and as a single file on JSFiddle:

class Tile {

    constructor(p5, x, y, dimension, row, delay) {
        this.p5 = p5;
        this.x = x;
        this.y = y;
        this.dimension = dimension;
        this.delay = delay;
        this.onFirst = row % 2;
        this.on = p5.color(255, 184, 0);
        this.off = p5.color(26, 17, 16);
        this.diameter = Math.sqrt(Math.pow(dimension, 2) * 2)
        this.pg = p5.createGraphics(dimension, dimension)
        this.pg.noStroke();
    }

    update() {
        if (this.delay === 0) {
            if (this.diameter < 0) {
                this.diameter = Math.sqrt(Math.pow(this.dimension, 2) * 2);
                this.onFirst = !this.onFirst;
                this.delay = 120;
            }
            else {
                this.diameter -= 1;
            }
        } else {
            this.delay -= 1;
        }
        return this.draw();
    }

    draw() {
        this.pg.fill(this.onFirst ? this.off : this.on);
        this.pg.rect(0, 0, this.dimension, this.dimension);
        this.pg.fill(this.onFirst ? this.on : this.off);
        this.pg.circle(this.dimension / 2, this.dimension / 2, this.diameter);
        return this.pg;
    }
}

new p5(p5 => {

    const rows = 14;
    const columns = 14;
    const dimension = 40;
    const framerate = 20;
    const tiles = [];
    const delay = 30;

    p5.setup = () => {
        p5.createCanvas(columns * dimension, rows * dimension);
        for (let row = 0; row < rows; row++) {
            for (let column = 0; column < columns; column++) {
                tiles.push(new Tile(
                    p5,
                    column * dimension,
                    row * dimension,
                    dimension,
                    row,
                    column % 2 ? ((rows - row) * 5) + 80 : row * 5
                ));
            }
        }
    };

    p5.draw = () => {
        p5.background(200);
        tiles.forEach((tile) => {
            p5.image(tile.update(), tile.x, tile.y);
        });
    };
});

Wednesday, 24 April 2019

JS Comma Operator

A mate at work asked me a question about checking things in JS. He had a case where if an object had a property he needed to check for 3 conditions, one of which was if the properties value matched a given value. If it didn't have the property then he needed just needed to check 2 conditions. He wasn't overly keen on wrapping the two conditions within a further if statement and asked if I knew of a way of combining them all into one if statement, I must admit I knew that there was one but I couldn't think of it for the life of me...

As in a particularly nasty case of athletes foot, it itched at me overnight, then I started to remember a rather obscure feature of JS which it seems it borrowed from C, the Comma Operator. In order to check that it would do what he needed to do, I wrote this simple JSFiddle:

let a;

if(true && true && a === 1, a){
  alert("First: a === 1");
}

a = 1;

if(true && true && a === 1, a){
  alert("Second: a === 1");
}

It's rather obscure though, so I'm a little concerned about using it with production code, as discussed on StackOverflow.