mareBall/index.html at main · CHooverShrimp/mareBall · GitHub

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<!DOCTYPE html>
<html>

<head>
    <title>Mare Ball</title>
    <meta content="Mare ball" property="og:title" />
    <meta content="What if you go to Equestria and all the mares are balls and are bouncy?" property="og:description" />
    <meta content="#43B581" data-react-helmet="true" name="theme-color" />
    <style>
        canvas {
            display: block;
            margin: 0 auto;
            background-color: #00000078;
            filter: blur(0.5px);
        }

        #container {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 200px;
        }

        h1 {
            text-align: center;
        }

        .container {
            align-items: center;
            text-align: center;
        }

        body {
            /*background-image: url("https://i.kym-cdn.com/photos/images/original/000/581/296/c09.jpg");*/
            background-color:blanchedalmond;
        }
    </style>
</head>

<body>
    <h1> MARE BALL </h1>
    <canvas id="canvas" width="800" height="600"></canvas>
    <div id="container">
        <div id="uploadContainer" class="container">
            <p> Mare uploader: </p>
            <input type="file" id="imageInput" accept="image/*">
        </div>
        <div id="sizeContainer" class="container">
            <p> Mare size: </p>
            <input type="range" id="radiusSlider" min="10" max="100" value="20">
        </div>
        <div id="crazyMare" class="container">
            <p> Click to activate Crazy Mare Mode </p>
            <input type="checkbox" id="crazyMare">
        </div>
    </div>

    <script>
        let isSpacebarDown = false;
        let crazyMare = false;

        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');

        // Initial conditions
        let x = canvas.width / 2;
        let y = canvas.height / 2;
        let vx = 5;
        let vy = 5;
        const gravity = 0.5;
        let radius = 20;

        // variables
        let vel = 20;
        const dampingFactorX = 0.7;
        const dampingFactorY = 0.5;
        let angle = 0;
        let rotVx = 0;
        let rotVy = 0;
        let brakeStrength = 0.1;

        // Load image
        const img = new Image();
        img.src = 'fs.jpg'; // Initial image

        function drawBall() {
            ctx.filter = 'blur(0.5px)';
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            ctx.save();
            ctx.beginPath();
            ctx.arc(x, y, radius, 0, 2 * Math.PI);
            ctx.closePath();
            ctx.clip();
            ctx.translate(x, y);
            ctx.rotate(angle); // in radian
            ctx.drawImage(img, -radius, -radius, radius * 2, radius * 2); // Draw the image
            ctx.restore();
        }

        function getMousePos(canvas, e) {
            const rect = canvas.getBoundingClientRect();
            return {
                x: e.clientX - rect.left,
                y: e.clientY - rect.top
            };
        }

        function update() {
            x += vx;
            y += vy;

            if (isSpacebarDown) // Apply brake
            {
                vx = vx * (1 - brakeStrength);
                if (vy < 0)
                    vy = vy * (1 - brakeStrength);
            }

            // Gravitational acceleration only when there's potential
            if (y < canvas.height - radius)
                vy += gravity;

            vx *= 0.995; // Air drag


            // radial velocity
            if (y >= canvas.height - radius || y <= radius) // if collide
            {
                if (vx == 0)
                    rotVy = 0;
                else
                    rotVy = vy / radius * ((vx > 0) ? 1 : -1);
                angle += vx / radius;
            }

            angle += rotVy * 0.5;

            if (x >= canvas.width - radius || x <= radius) // if collide
            {
                angle += vx / radius;
            }

            // More collision detection

            if (x + radius > canvas.width || x - radius < 0) {
                vx *= -dampingFactorX;
                x = (x + radius > canvas.width) ? canvas.width - radius : radius;
            }
            // stopping vx sim when meeting threshold
            if (Math.abs(vx) < 0.05)
                vx = 0;

            if (y + radius > canvas.height || y - radius < 0) {
                vy *= -dampingFactorY;
                y = (y + radius > canvas.height) ? canvas.height - radius : radius;
                // stopping vy sim when meeting threshold
                if (Math.abs(vy) < 0.5)
                    vy = 0;
            }
        }

        function randomizeV() {
            vx += Math.random() * 100 * (Math.random() < 0.5 ? 1 : -1);
            vy += Math.random() * 100 * (Math.random() < 0.5 ? 1 : -1);
        }

        // Helper function to normalize a vector
        function normalizeVector(x, y) {
            const magnitude = Math.sqrt(x * x + y * y);
            return {
                x: x / magnitude,
                y: y / magnitude
            };
        }

        // Function to calculate the fling direction and velocity
        function flingToDir(vel, e) {
            const mousePos = getMousePos(canvas, e);
            const vecx = mousePos.x - x;
            const vecy = mousePos.y - y;

            const normalizedVector = normalizeVector(vecx, vecy);

            vx += vel * normalizedVector.x ** 2 * ((vecx > 0) ? 1 : -1)
            vy += vel * normalizedVector.y ** 2 * ((vecy > 0) ? 1 : -1)
        }

        // Interactivity

        canvas.addEventListener('mousedown', (e) => {
            flingToDir(vel, e);
        });

        document.addEventListener('keydown', (e) => {
        if (e.code === 'Space') {
            isSpacebarDown = true;
        }
        });

        document.addEventListener('keyup', (e) => {
        if (e.code === 'Space') {
            isSpacebarDown = false;
        }
        });


        function handleImageChange(event) {
            const file = event.target.files[0];
            if (file) {
                const reader = new FileReader();
                reader.onload = function () {
                    img.src = reader.result;
                    img.onload = animate; // Call animate() when the new image is loaded
                }
                reader.readAsDataURL(file);
            }
        }

        function handleRadiusChange(event) {
            radius = parseInt(event.target.value);
        }

        function crazyMareMode(event) {
            crazyMare = event.target.checked;
        }

        window.onload = function () {
            // handles image
            const imageInput = document.getElementById('imageInput');
            imageInput.addEventListener('change', handleImageChange);

            // handles radius
            const radiusSlider = document.getElementById('radiusSlider');
            radiusSlider.addEventListener('input', handleRadiusChange);

            // handles tickbox
            const tickBox = document.getElementById('crazyMare');
            tickBox.addEventListener('change', crazyMareMode);
            animate(); // Start the animation
        }

        // Runs

        function animate() {
            drawBall();
            update();
            if (crazyMare) {
                if (Math.random() < 0.2)
                    randomizeV();
            }
            requestAnimationFrame(animate);
        }
    </script>
</body>

</html>