98 lines
2.3 KiB
HTML
98 lines
2.3 KiB
HTML
<!DOCTYPE html>
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<html>
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<!-- ahhh -->
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<body style="margin:0;overflow: hidden;">
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<canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;">
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Your browser does not support the HTML5 canvas tag.</canvas>
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<script>
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let c = document.getElementById("myCanvas");
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let ctx = c.getContext("2d");
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ctx.canvas.width = window.innerWidth;
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ctx.canvas.height = window.innerHeight;
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let deg_per_sec = 30;
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let time = 120;
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let fps = 60;
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centerX = ctx.canvas.width / 2;
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centerY = ctx.canvas.height / 2;
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rotation = 0; //was = j = angle
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currentFrame = 0; //was = i
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function render() {
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if (currentFrame < time / (1 / fps)) {
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setTimeout(() => {
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render();
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render_clear();
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Draw_Phyllotaxis(rotation / 5000 + 1);
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// Draw_Phyllotaxis(rotation/5000);
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// Draw_center(); //Debugging
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// DrawBorder();
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}, 1000 / fps);
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rotation += deg_per_sec / fps; // was = j = angle, now = rotation
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currentFrame += 1; // was = i
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}
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}
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render();
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function Draw_Phyllotaxis(angle) {
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colour1 = [255, 170, 0];
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colour2 = [255, 0, 221];
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var c = 24; //something to do with width. but not width
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for (let n = 0; n < 300; n += 1) {
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ncolour = LerpRGB(colour1, colour2, Math.cos(rad(n / 2)));
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var a = n * (angle)//137.5;
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var r = c * Math.sqrt(n);
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var x = r * Math.cos(a) + centerX;
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var y = r * Math.sin(a) + centerY;
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ctx.beginPath();
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ctx.arc(x, y, 4, 0, 2 * Math.PI);
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ctx.fillStyle = colourToText(ncolour);
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ctx.fill();
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}
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}
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function rad(degrees) {
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var pi = Math.PI;
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return degrees * (pi / 180);
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}
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function LerpRGB(a, b, t) {
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if (t < 0) {
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t *= -1;
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}
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var newColor = [0, 0, 0];
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newColor[0] = a[0] + (b[0] - a[0]) * t;
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newColor[1] = a[1] + (b[1] - a[1]) * t;
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newColor[2] = a[2] + (b[2] - a[2]) * t;
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return newColor;
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}
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function colourToText(colour) {
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return "rgb(" + colour[0] + "," + colour[1] + "," + colour[2] + ")"
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}
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function render_clear() {
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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ctx.fillStyle = "black";
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ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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}
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</script>
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</body>
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</html> |