86 lines
2.0 KiB
HTML
86 lines
2.0 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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let squares = 1;
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let tmpTimer = 0;
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render_clear();
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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_rectangle_pattern1(rotation, squares, 200, "blue");
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if (tmpTimer >= fps/2 & squares != 40) {
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tmpTimer = 0;
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squares += 1;
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}
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tmpTimer += 1;
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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_rectangle_pattern1(rotation, squares, size, colour) {
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for (let z = 0; z < 360; z += 360 / squares) {
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drawSquare(z + rotation);
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}
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function drawSquare(angle) {
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ctx.save();
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ctx.translate(centerX, centerY)//-(Math.sin(rad(angle)) *centerX));
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ctx.rotate(rad(angle + 180));
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ctx.beginPath();
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ctx.strokeStyle = colour;
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ctx.rect(-size, -size, size, size);
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ctx.stroke();
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ctx.restore();
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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 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> |