BloomingFlower/flower.html at main · Datu1213/BloomingFlower · GitHub

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<!DOCTYPE html>
<html lang="en">
    <meta content="utf-8" charset="utf-8">
    <title>
        aa
    </title>
    <header>
       <style>
        body {
            width: 100vw;
            height: 100vh;
        }
        .flower {
            border: dashed 1vh;
            position: relative;
            width: 20vh;
            height: 20vh;
            left: 40vh;
            top: 40vh;
        }
        .petal {
            position: absolute;
            width: calc(var(--radius) * 2);
            height: calc(var(--radius) * 2);
            border-radius: 50.0%;
            background: transparent;
            overflow: hidden;
            transform-origin: '';
            transform: rotate(var(--rotate-deg));
            mix-blend-mode: screen;
        }
        .petal:before {
            content: "";
            width: inherit;
            height: inherit;
            border-radius: inherit;
            position: absolute;
            background: linear-gradient(135deg, rgb(0, 0, 255), rgb(255, 255, 255));
            left: calc(2 * var(--radius) - var(--petal-width));
        }
        input {
            position: relative;
            height: 10vh;
            width: 20vw;
        }

    </style>
    </header>
    <body>
        <div class="flower" id = "flower">  </div>
        <div style="display: flex; flex-direction: column;margin-top: 5vh;">
            <label for="petal-length">Length</label>
            <input class="flower-control" id="petal-length" type="range" min="1" max="30" value="20" step="1""/>
            <label for="petal-width">Width</label>
            <input class="flower-control" id="petal-width" type="range" min="1" max="30" value="1" step="1"/>
            <label for="petal-num">Num</label>
            <input class="flower-control" id="petal-num" type="range" min="1" max="72" value="3" step="1"/>
            <label for="petal-alpha">Alpha</label>
            <input class="flower-control" id="petal-alpha" type="range" min="0" max="1" value="1" step="0.001"/>
            <label for="flower-alpha">Range</label>
            <input class="flower-control" id="flower-range" type="range" min="0" max="360" value="180" step="1"/>
        </div>
    </body>
    <script>
        function bloom(petalLength, petalWidth, petalNum, alpha, flowerRangeDegree, aa = undefined) {
            // Basic Pythagorean theorem
            // (Radius - Width/2)^2 + (Length/2)^2 = Radius^2
            // Radius = ((Width/2)^2 + (Length/2)^2) / Width = (Width^2 + Length^2) / (4 * Width)
            let radius = Number((petalLength * petalLength + petalWidth * petalWidth) / (4 * petalWidth));
            let flower = document.getElementById('flower')
            flower.style.width  = `${ 2 * petalLength}vh`;
            flower.style.height = `${ 2 * petalLength}vh`;
            flower.style.left   = `${50 - petalLength}vh`;
            flower.style.top    = `${50 - petalLength}vh`;

            let middleToSides = false?1:-1; // middleToSides: 1; sidesToMiddle: -1
            let odd = petalNum % 2; // Avilaible when var middleToSides is not undifined
            let bias = Number(flowerRangeDegree === 360?1:0); // 360deg flower range will have a bias value "1"
            // let middlePetal = Math.ceil(petalNum / 2); // Deprecated
            let clockwise = false?1:-1; // Clockwise: 1, Anti-clockwise: -1
            let synchronous = false // Petals move synchronously:true or one-by-one:false.
            let beginOffset = (1 - bias) * (-clockwise * flowerRangeDegree / 2);
            let degreeUnit = flowerRangeDegree / (Number(petalNum) + 1.0 - bias);
            let actualRotateDegree = 0;
            let rotateDegree = function(clockwise, i, degreeUnit, flowerRangeDegree, petalNum, middleToSides, odd, bias, alpha, synchronous) {
                    if (undefined === middleToSides) {
                        if (synchronous)
                            return Number(clockwise * i * degreeUnit * alpha);
                        return clockwise * Math.min(Number(i * degreeUnit), Math.max(0, Number((flowerRangeDegree - (1 - bias) * degreeUnit) * alpha - bias * degreeUnit)));
                    } else {
                        if (synchronous)
                            return i * degreeUnit * alpha;
                        return Math.min(Number(i * degreeUnit), Math.max(0, Number((Math.ceil((petalNum - 1) / 2) - bias + Number(bias * petalNum % 2) + 1 + bias*(1 - petalNum % 2)) * alpha * degreeUnit - degreeUnit -1*(middleToSides - 1)/2 * degreeUnit)));
                    }
                }
            let opacity = function(i , alpha, petalNum, bias, synchronous, middleToSides, degreeUnit) {
                if (undefined === middleToSides) {
                    if (synchronous)
                        return 1 / (1 + Math.exp(-30 * alpha + 10)) + "";
                    let tmpAlpha = petalNum * alpha - Number(i) - Number(bias) + 1.0;
                    return Math.min(1, Math.max(0, tmpAlpha)) + "";
                } else {
                    if (synchronous) {
                        return 1 / (1 + Math.exp(-30 * alpha + 10)) + "";
                    }
                    let tmpAlpha = ((Math.ceil((petalNum - 1) / 2) - bias + Number(bias * petalNum % 2) + 1 + bias*(1 - petalNum % 2)) * alpha) - i + -1*(middleToSides - 1)/2

                    return Math.min(1, Math.max(0, tmpAlpha)) + "";
                }

            }
            if (middleToSides === undefined) {
                for (let i = 0 + (1 - bias); i < Number(petalNum) + (1 - bias); i++) {
                    // let op = opacity(i , alpha, petalNum, bias, synchronous, middleToSides, degreeUnit);
                    // if ("0" === op) continue;

                    let petal = document.createElement('div');
                    petal.className    = 'petal';
                    actualRotateDegree = Number(beginOffset + rotateDegree(clockwise, i, degreeUnit, flowerRangeDegree, petalNum, middleToSides, odd, bias, alpha, synchronous));

                    petal.style.setProperty('--radius',      `${radius}vh`);
                    petal.style.setProperty('--rotate-deg',  `${actualRotateDegree}deg`);
                    petal.style.setProperty('--petal-width', `${petalWidth}vh`);
                    let transformOriginX = 2 * radius - petalWidth  / 2 + "vh";
                    let transformOriginY =     radius + petalLength / 2 + "vh";
                    petal.style.transformOrigin = `${transformOriginX}     ${transformOriginY}`;
                    petal.style.left            = `${Number(petalWidth ) / 2.0 + Number(petalLength) - 2.0 * radius}vh`;
                    petal.style.top             = `${Number(petalLength) / 2.0 - radius}vh`;
                    petal.style.opacity         = opacity(i , alpha, petalNum, bias, synchronous, middleToSides, degreeUnit);
                    flower.appendChild(petal);
                }
            } else {
                if (-1 === middleToSides && 1 === bias) throw Error("Not supported! SideToMiddle and 360deg range are not compatible!")
                beginOffset = 1 === middleToSides?0:flowerRangeDegree / 2;
                if (1 === petalNum % 2 || 1 === bias){
                    let petal = document.createElement('div');
                    petal.className    = 'petal';
                    actualRotateDegree = Number(0 * beginOffset + rotateDegree(clockwise, 0, degreeUnit, flowerRangeDegree, petalNum, middleToSides, odd, bias, alpha, synchronous));

                    petal.style.setProperty('--radius',      `${radius}vh`);
                    petal.style.setProperty('--rotate-deg',  `${actualRotateDegree}deg`);
                    petal.style.setProperty('--petal-width', `${petalWidth}vh`);
                    let transformOriginX = 2 * radius - petalWidth  / 2 + "vh";
                    let transformOriginY =     radius + petalLength / 2 + "vh";
                    petal.style.transformOrigin = `${transformOriginX}     ${transformOriginY}`;
                    petal.style.left            = `${Number(petalWidth ) / 2.0 + Number(petalLength) - 2.0 * radius}vh`;
                    petal.style.top             = `${Number(petalLength) / 2.0 - radius}vh`;
                    petal.style.opacity         = opacity(1===middleToSides?0:petalNum / 2, alpha, petalNum, bias, synchronous, middleToSides, degreeUnit);
                    flower.appendChild(petal);
                }
                for (let i = 1; i <= Math.ceil((petalNum - 1) / 2) - bias + Number(bias * petalNum % 2); i++) {
                    let petal = document.createElement('div');
                    petal.className    = 'petal';
                    actualRotateDegree = Number(middleToSides * beginOffset + rotateDegree(clockwise, i, degreeUnit, flowerRangeDegree, petalNum, middleToSides, odd, bias, alpha, synchronous));

                    petal.style.setProperty('--radius',      `${radius}vh`);
                    petal.style.setProperty('--rotate-deg',  `${actualRotateDegree}deg`);
                    petal.style.setProperty('--petal-width', `${petalWidth}vh`);
                    let transformOriginX = 2 * radius - petalWidth  / 2 + "vh";
                    let transformOriginY =     radius + petalLength / 2 + "vh";
                    petal.style.transformOrigin = `${transformOriginX}     ${transformOriginY}`;
                    petal.style.left            = `${Number(petalWidth ) / 2.0 + Number(petalLength) - 2.0 * radius}vh`;
                    petal.style.top             = `${Number(petalLength) / 2.0 - radius}vh`;
                    petal.style.opacity         = opacity(i, alpha, petalNum, bias, synchronous, middleToSides, degreeUnit);
                    flower.appendChild(petal);

                    // ---------------------------------------------------------------

                    petal = document.createElement('div');
                    petal.className    = 'petal';
                    actualRotateDegree = Number(-middleToSides * beginOffset + -1 * rotateDegree(clockwise, i, degreeUnit, flowerRangeDegree, petalNum, middleToSides, odd, bias, alpha, synchronous));

                    petal.style.setProperty('--radius',      `${radius}vh`);
                    petal.style.setProperty('--rotate-deg',  `${actualRotateDegree}deg`);
                    petal.style.setProperty('--petal-width', `${petalWidth}vh`);
                    transformOriginX = 2 * radius - petalWidth  / 2 + "vh";
                    transformOriginY =     radius + petalLength / 2 + "vh";
                    petal.style.transformOrigin = `${transformOriginX}     ${transformOriginY}`;
                    petal.style.left            = `${Number(petalWidth ) / 2.0 + Number(petalLength) - 2.0 * radius}vh`;
                    petal.style.top             = `${Number(petalLength) / 2.0 - radius}vh`;
                    petal.style.opacity         = opacity(i, alpha, petalNum, bias, synchronous, middleToSides, degreeUnit);;
                    flower.appendChild(petal);
                }

                if (1 === bias && 0 === petalNum % 2) {
                    let petal = document.createElement('div');
                    petal.className    = 'petal';
                    actualRotateDegree = Number(beginOffset + rotateDegree(clockwise, petalNum / 2, degreeUnit, flowerRangeDegree, petalNum, middleToSides, odd, bias, alpha, synchronous));
                    actualRotateDegree = petalNum / 2 * degreeUnit
                    petal.style.setProperty('--radius',      `${radius}vh`);
                    petal.style.setProperty('--rotate-deg',  `${actualRotateDegree}deg`);
                    petal.style.setProperty('--petal-width', `${petalWidth}vh`);
                    let transformOriginX = 2 * radius - petalWidth  / 2 + "vh";
                    let transformOriginY =     radius + petalLength / 2 + "vh";
                    petal.style.transformOrigin = `${transformOriginX}     ${transformOriginY}`;
                    petal.style.left            = `${Number(petalWidth ) / 2.0 + Number(petalLength) - 2.0 * radius}vh`;
                    petal.style.top             = `${Number(petalLength) / 2.0 - radius}vh`;
                    petal.style.opacity         = opacity(petalNum / 2, alpha, petalNum, bias, synchronous, middleToSides, degreeUnit);;
                    flower.appendChild(petal);
                }
            }
        }


        [...document.getElementsByClassName('flower-control')].forEach(controller => {
            controller.addEventListener('input', function(e) {
                let petalLength        = document.getElementById('petal-length').value;
                let petalWidth         = document.getElementById('petal-width' ).value;
                let petalNum           = document.getElementById('petal-num'   ).value;
                let petalAlpha         = document.getElementById('petal-alpha' ).value;
                let flowerRangeDegree  = document.getElementById('flower-range').value;
                [...document.getElementById('flower').children].forEach(petal => {
                    petal.remove();
                })
                bloom(petalLength, petalWidth, petalNum, Number(petalAlpha), Number(flowerRangeDegree));
            })
        })

        let petalLength        = document.getElementById('petal-length').value;
        let petalWidth         = document.getElementById('petal-width' ).value;
        let petalNum           = document.getElementById('petal-num'   ).value;
        let petalAlpha         = document.getElementById('petal-alpha' ).value;
        let flowerRangeDegree  = document.getElementById('flower-range').value;
        bloom(petalLength, petalWidth, petalNum, Number(petalAlpha), Number(flowerRangeDegree));


    </script>
</html>