adding repo
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<!doctype html>
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<title>Tile Rotation</title>
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<script src="js/app.js"></script>
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<canvas id="canvas" style="width:700px; height: 700px;"></canvas>
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<br>
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<input type="file" id="fileUpload"></input>
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<br>
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<input type="range" id="rotation" min=-180 max=180 value=0 style='width:600px;'></input> <span id="angle">0</span>°
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<br>
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<button id="save">Save</button>
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{
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"angles": [
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{"angle": 0.0, "numerator": 0, "denominator": 1},
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{"angle": 5.710593137499643, "numerator": 1, "denominator": 10},
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{"angle": 6.340191745909909, "numerator": 1, "denominator": 9},
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{"angle": 7.125016348901798, "numerator": 1, "denominator": 8},
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{"angle": 8.130102354155978, "numerator": 1, "denominator": 7},
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{"angle": 9.462322208025617, "numerator": 1, "denominator": 6},
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{"angle": 11.309932474020215, "numerator": 1, "denominator": 5},
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{"angle": 12.528807709151511, "numerator": 2, "denominator": 9},
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{"angle": 14.036243467926479, "numerator": 1, "denominator": 4},
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{"angle": 15.945395900922854, "numerator": 2, "denominator": 7},
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{"angle": 16.69924423399362, "numerator": 3, "denominator": 10},
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{"angle": 18.43494882292201, "numerator": 1, "denominator": 3},
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{"angle": 20.556045219583467, "numerator": 3, "denominator": 8},
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{"angle": 21.80140948635181, "numerator": 2, "denominator": 5},
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{"angle": 23.198590513648185, "numerator": 3, "denominator": 7},
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{"angle": 23.962488974578182, "numerator": 4, "denominator": 9},
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{"angle": 26.565051177077994, "numerator": 1, "denominator": 2},
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{"angle": 29.054604099077146, "numerator": 5, "denominator": 9},
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{"angle": 29.74488129694222, "numerator": 4, "denominator": 7},
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{"angle": 30.96375653207352, "numerator": 3, "denominator": 5},
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{"angle": 32.005383208083494, "numerator": 5, "denominator": 8},
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{"angle": 33.690067525979785, "numerator": 2, "denominator": 3},
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{"angle": 34.99202019855866, "numerator": 7, "denominator": 10},
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{"angle": 35.53767779197438, "numerator": 5, "denominator": 7},
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{"angle": 36.86989764584402, "numerator": 3, "denominator": 4},
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{"angle": 37.874983651098205, "numerator": 7, "denominator": 9},
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{"angle": 38.659808254090095, "numerator": 4, "denominator": 5},
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{"angle": 39.8055710922652, "numerator": 5, "denominator": 6},
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{"angle": 40.60129464500447, "numerator": 6, "denominator": 7},
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{"angle": 41.18592516570965, "numerator": 7, "denominator": 8},
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{"angle": 41.6335393365702, "numerator": 8, "denominator": 9},
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{"angle": 41.987212495816664, "numerator": 9, "denominator": 10},
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{"angle": 45.0, "numerator": 1, "denominator": 1},
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{"angle": 48.01278750418334, "numerator": 10, "denominator": 9},
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{"angle": 48.366460663429805, "numerator": 9, "denominator": 8},
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{"angle": 48.81407483429035, "numerator": 8, "denominator": 7},
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{"angle": 49.398705354995535, "numerator": 7, "denominator": 6},
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{"angle": 50.19442890773481, "numerator": 6, "denominator": 5},
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{"angle": 51.34019174590991, "numerator": 5, "denominator": 4},
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{"angle": 52.1250163489018, "numerator": 9, "denominator": 7},
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{"angle": 53.13010235415598, "numerator": 4, "denominator": 3},
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{"angle": 54.46232220802562, "numerator": 7, "denominator": 5},
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{"angle": 55.00797980144134, "numerator": 10, "denominator": 7},
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{"angle": 56.309932474020215, "numerator": 3, "denominator": 2},
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{"angle": 57.9946167919165, "numerator": 8, "denominator": 5},
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{"angle": 59.03624346792648, "numerator": 5, "denominator": 3},
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{"angle": 60.25511870305777, "numerator": 7, "denominator": 4},
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{"angle": 60.94539590092286, "numerator": 9, "denominator": 5},
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{"angle": 63.43494882292202, "numerator": 2, "denominator": 1},
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{"angle": 66.03751102542182, "numerator": 9, "denominator": 4},
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{"angle": 66.80140948635182, "numerator": 7, "denominator": 3},
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{"angle": 68.19859051364818, "numerator": 5, "denominator": 2},
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{"angle": 69.44395478041653, "numerator": 8, "denominator": 3},
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{"angle": 71.56505117707799, "numerator": 3, "denominator": 1},
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{"angle": 73.30075576600639, "numerator": 10, "denominator": 3},
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{"angle": 74.05460409907715, "numerator": 7, "denominator": 2},
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{"angle": 75.96375653207353, "numerator": 4, "denominator": 1},
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{"angle": 77.47119229084849, "numerator": 9, "denominator": 2},
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{"angle": 78.69006752597979, "numerator": 5, "denominator": 1},
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{"angle": 80.53767779197439, "numerator": 6, "denominator": 1},
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{"angle": 81.86989764584403, "numerator": 7, "denominator": 1},
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{"angle": 82.8749836510982, "numerator": 8, "denominator": 1},
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{"angle": 83.6598082540901, "numerator": 9, "denominator": 1},
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{"angle": 84.28940686250036, "numerator": 10, "denominator": 1}
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]
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}
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var angle_arr = [];
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function closest(val){
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x= angle_arr.reduce(function(prev, cur) {
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return Math.abs(cur.angle - val) < Math.abs(prev.angle - val) ? cur : prev;
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});
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return x;
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}
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window.onload = function() {
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fetch('js/angles.json').then((response)=>response.json()).then((json)=>angle_arr=json.angles);
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var input = document.getElementById('fileUpload');
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input.addEventListener('change', handleFiles);
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rotation.addEventListener("input", (event) => {
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var closestAngle = closest(event.target.value);
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console.log(closestAngle);
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event.target.value = closestAngle.angle;
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angle.textContent = event.target.value;
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tileImg(closestAngle.angle);
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})
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canvas.width = 700;
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canvas.height = 700;
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}
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var img = new Image;
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function handleFiles(e) {
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img.onload = tileImg;
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img.src = URL.createObjectURL(e.target.files[0]);
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}
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function tileImg(a) {
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var ctx = document.getElementById('canvas').getContext('2d');
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var image = img;
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// Set the angle in radians
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const angleDeg = a; // Replace with your desired angle in degrees
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const angle = angleDeg * Math.PI / 180;
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// Create a temporary canvas
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var tempCanvas = document.createElement ("canvas");
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var tempCtx = tempCanvas.getContext ("2d");
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// Calculate the diagonal length of the original canvas
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var d = Math.sqrt (canvas.width * canvas.width + canvas.height * canvas.height);
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// Set the temporary canvas dimensions to the diagonal length
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tempCanvas.width = d;
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tempCanvas.height = d;
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// Create the pattern on the temporary context
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var pattern = tempCtx.createPattern (image, "repeat");
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// Set the fill style on the temporary context
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tempCtx.fillStyle = pattern;
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// Save the temporary context state
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tempCtx.save ();
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// Translate to the center of the temporary canvas
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tempCtx.translate (d / 2, d / 2);
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// Rotate by the angle
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tempCtx.rotate (angle);
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// Draw the rectangle with the pattern on the temporary context
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tempCtx.fillRect (-d / 2, -d / 2, d, d);
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// Restore the temporary context state
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tempCtx.restore ();
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// Draw the temporary canvas on the original canvas
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ctx.drawImage (tempCanvas, - (d - canvas.width) / 2, - (d - canvas.height) / 2);
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}
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