89 lines
2.1 KiB
HTML
89 lines
2.1 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 = 15;
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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_nodal(300, 13, 4, rotation, "#FFD700");
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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_nodal(radius, points, step, rotate, colour) {
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var angle = 360 / points * step
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ctx.beginPath();
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var start_angle = angle;
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var done = false;
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var total_moves = 1;
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ctx.moveTo(centerX + (Math.cos(rad(angle + rotate)) * radius), centerY + (Math.sin(rad(angle + rotate)) * radius));
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while (done != true) {
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if ((total_moves * step) % points != 0) {
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total_moves++
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}
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else {
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total_moves++
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done = true
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}
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}
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for (let z = 1; z <= total_moves; z++) {
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ctx.lineTo(centerX + (Math.cos(rad(angle * z + rotate)) * radius), centerY + (Math.sin(rad(angle * z + rotate)) * radius));
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}
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ctx.strokeStyle = colour;
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ctx.lineWidth = 8
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ctx.stroke();
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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 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> |