projector/blockwrap.html at master · blueyred/projector · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Broken Stripes</title>
<style>
body {
margin: 0;
overflow: hidden;
}
canvas {
display: block;
}
#keys{
    position: absolute;
    bottom: 0;
    right:0;
    padding: 5px 20px;
    background-color: white;
    color: black;
    font-family: "Courier New", Courier, monospace;
    font-size: 14px;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<div id="keys" style="display:none">
    <p><b>F</b> fullscreen</p>
    <p><b>D</b> direction</p>
    <p><b>H</b> orientation</p>
    <p><b>R</b> regenerate</p>
    <p><b>I</b> invert</p>

    <p><b>A</b> <b>S</b> Speed</p>
    <p><b>Z</b> <b>X</b> Num stripes</p>
    <p><b>N</b> <b>M</b> Num blocks</p>
    <p><b>Q</b> <b>W</b> Thickness</p>
</div>
<script>
const keysEl = document.getElementById('keys');
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

var stripeWidth = 64;
var numStripes = 8;
var stripeMargin;
var blockHeight = 32; // Height of each block in the stripe
var gapHeight = 32;

var speed = 2;
var offset = 0;

var direction = -1;
var isHorizontal = false; // Flag for orientation
var stripes = []; // Array to store stripe data

var white = 'hsl(0,0%,100%)';
var black = 'hsl(0,0%,0%)';

var backg = black;
var frontg = white;

function resizeCanvas() {
    canvas.width = window.innerWidth;
    canvas.height = window.innerHeight;
    if (isHorizontal) {
        stripeMargin = (canvas.width - (numStripes * stripeWidth)) / numStripes;
    } else {
        stripeMargin = (canvas.width - (numStripes * stripeWidth)) / numStripes;
    }
    generateStripes();
    drawStripes();
}

function generateStripes() {
    stripes = []; // Clear existing stripes

    for (let i = 0; i < numStripes; i++) {
        let blocks = [];
        let stripePos = i * (stripeWidth + stripeMargin);

        let currentY = -canvas.height; // Start off-screen

        while (currentY < canvas.height) {
            let blockLength = Math.floor(Math.random() * 4) + 1.0; // 1 to 3 blocks long
            if (Math.random() > 0.35) { // 50% chance to create a block
                blocks.push({
                    start: currentY,
                    length: blockLength
                });
            }
            currentY += blockLength * blockHeight + (((Math.random() * 2)+ 0.2) * gapHeight); // Add gap
        }

        stripes.push({
            position: stripePos,
            blocks: blocks
        });
    }
}

function drawStripes() {
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    ctx.fillStyle = backg;//'hsl(0,0%,0%)';
    ctx.fillRect(0, 0, canvas.width, canvas.height);

    ctx.fillStyle = frontg;//'hsl(0,0%,100%)';
    for (let stripe of stripes) {
        for (let block of stripe.blocks) {
            let x = stripe.position;
            let y = block.start - (offset * direction);
            let w = stripeWidth;
            let h = block.length * blockHeight;

            // Start off-screen and wrap-around
            if (y + h < 0) {
                block.start += canvas.height * 2 + h; // Move to bottom if off-screen at top
            } else if (y > canvas.height) {
                block.start -= canvas.height * 2 + h; // Move to top if off-screen at bottom
            }

            y = block.start - (offset * direction); // Recalculate y after adjustment

            ctx.fillRect(x, y, w, h);

            // Duplicate on other side for continuous wrap-around
            if (isHorizontal) {
                ctx.fillRect(x + canvas.width, y, w, h);
                ctx.fillRect(x - canvas.width, y, w, h);
            }
        }
    }
}

function animate() {
    offset += speed;

    drawStripes();
    requestAnimationFrame(animate);
}

window.addEventListener('resize', resizeCanvas);
resizeCanvas();
animate();

document.addEventListener(
    "keydown",
    (e) => {
        if (e.key === "f") {
            toggleFullScreen();
        }
        if (e.key === "a") {
            speedDown();
        }
        if (e.key === "s") {
            speedUp();
        }
        if (e.key === "z") {
            lessStripes();
        }
        if (e.key === "x") {
            moreStripes();
        }
        if (e.key === "q") {
            thinner();
        }
        if (e.key === "w") {
            thicker();
        }
        if (e.key === "d") {
            direction *= -1;
        }
        if (e.key === "h") {
            toggleOrientation();
        }
        if (e.key === "r") {
            generateStripes(); // Regenerate stripes on 'r' key press
        }
        if(e.key === "i"){
            invert()
        }
        if (e.key === "n") {
            lessBlocks();
        }
        if (e.key === "m") {
            moreBlocks();
        }

        if (e.key === "k") {
            toggleKeys();
        }

    },
    false,
);

function toggleOrientation() {
    isHorizontal = !isHorizontal;
    resizeCanvas();
}

function thinner() {
    changeWidth(-1);
}

function thicker() {
    changeWidth(1);
}

function changeWidth(widthChange) {
    if (stripeWidth <= 64) {
        if (widthChange < 0) {
            stripeWidth *= 0.5;
        } else {
            stripeWidth *= 2;
        }
    } else {
        if (widthChange < 0) {
            stripeWidth -= 64;
        } else {
            stripeWidth += 64;
        }
    }
    console.log(stripeWidth);
    resizeCanvas();
}

function lessStripes() {
    changeStripes(-1);
}

function moreStripes() {
    changeStripes(1);
}
function lessBlocks() {
    changeBlocks(0.5);
}

function moreBlocks() {
    changeBlocks(2);
}

function changeBlocks(blocksChange) {
    blockHeight *= blocksChange
    resizeCanvas();
}

function changeStripes(stripeChange) {
    numStripes += stripeChange;
    if (numStripes < 1) {
        numStripes = 1;
    }
    console.log(numStripes);
    resizeCanvas();
}

function speedUp() {
    changeSpeed(2);
}

function speedDown() {
    changeSpeed(0.5);
}

function changeSpeed(multiplier) {
    speed *= multiplier;
}

function invert(){
    if(frontg == white){
        frontg = black;
        backg = white;
    }else{
        frontg = white;
        backg = black;
    }

}

function toggleFullScreen() {
    if (!document.fullscreenElement) {
        document.documentElement.requestFullscreen();
    } else if (document.exitFullscreen) {
        document.exitFullscreen();
    }
}

function toggleKeys(){
    keysEl.style.display = keysEl.style.display === "none" ? "block" : "none";
}
</script>
</body>
</html>