animate/Catalogue/square pattern.html

86 lines
2.0 KiB
HTML

<!DOCTYPE html>
<html>
<!-- ahhh -->
<body style="margin:0;overflow: hidden;">
<canvas id="myCanvas" width="10" height="10" style="display: block;box-sizing: border-box;">
Your browser does not support the HTML5 canvas tag.</canvas>
<script>
let c = document.getElementById("myCanvas");
let ctx = c.getContext("2d");
ctx.canvas.width = window.innerWidth;
ctx.canvas.height = window.innerHeight;
let deg_per_sec = 30;
let time = 120;
let fps = 60;
centerX = ctx.canvas.width / 2;
centerY = ctx.canvas.height / 2;
rotation = 0; //was = j = angle
currentFrame = 0; //was = i
let squares = 1;
let tmpTimer = 0;
render_clear();
function render() {
if (currentFrame < time / (1 / fps)) {
setTimeout(() => {
render();
render_clear();
Draw_rectangle_pattern1(rotation, squares, 200, "blue");
if (tmpTimer >= fps/2 & squares != 40) {
tmpTimer = 0;
squares += 1;
}
tmpTimer += 1;
}, 1000 / fps);
rotation += deg_per_sec / fps; // was = j = angle, now = rotation
currentFrame += 1; // was = i
}
}
render();
function Draw_rectangle_pattern1(rotation, squares, size, colour) {
for (let z = 0; z < 360; z += 360 / squares) {
drawSquare(z + rotation);
}
function drawSquare(angle) {
ctx.save();
ctx.translate(centerX, centerY)//-(Math.sin(rad(angle)) *centerX));
ctx.rotate(rad(angle + 180));
ctx.beginPath();
ctx.strokeStyle = colour;
ctx.rect(-size, -size, size, size);
ctx.stroke();
ctx.restore();
}
}
function rad(degrees) {
var pi = Math.PI;
return degrees * (pi / 180);
}
function render_clear() {
ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
ctx.fillStyle = "black";
ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
}
</script>
</body>
</html>