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HTML

              
                // ===
// === Remember, your browser is someone's oven :D
// ===

//- material
mixin torus(density)
	- let n = density % 2 === 0 ? density + 1 : density;
	.torus(style=`--n: ${n}`)
		- for(let i=0; i<n; i++)
			.side(style=`--i: ${i}`)

section(data-camera)
	section(data-scene)
		section(data-float)
			+torus(100)

//- controls
section(data-controls, data-isolated)
	input#toggle-rotate(type="checkbox", data-change="rotate")
	label(for="toggle-rotate", data-isolated) Rotate

	input#toggle-donut-fill(type="checkbox", data-change="donut-fill", checked)
	label(for="toggle-donut-fill", data-isolated) Yummy Donut

	input#toggle-lights(type="checkbox", data-change="lights", checked)
	label(for="toggle-lights", data-isolated) Lighting

	input#toggle-glare(type="checkbox", data-change="glare", checked)
	label(for="toggle-glare", data-isolated) Glare

	input#toggle-sprinkles(type="checkbox", data-change="sprinkles", checked)
	label(for="toggle-sprinkles", data-isolated) Sprinkles

	input#toggle-pbp(type="checkbox", data-change="pbp")
	label(for="toggle-pbp", data-isolated) Preserve Blind Points

	input#toggle-outlines(type="checkbox", data-change="outlines")
	label(for="toggle-outlines", data-isolated) Outlines

	input#toggle-wireframe(type="checkbox", data-change="wireframe")
	label(for="toggle-wireframe", data-isolated) Wireframe

	input#toggle-gradient-colors(type="checkbox", data-change="gradient-colors")
	label(for="toggle-gradient-colors", data-isolated) Gradient Colors

	//- hint text
	svg.hint(
		version="1.1",
		viewBox="0 0 35.134 29.888",
		xmlns="http://www.w3.org/2000/svg"
	)
		g.hint-text(transform="translate(-49.388 -131.57)")
			g(stroke-dashoffset="16.95")
				g(stroke-width="5.0535")
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					)
					path(
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					)
					path.special-arrow(
						d="m77.944 139.13c0.03222-0.0695 0.06795-0.13739 0.09667-0.20837 0.10368-0.25626 0.2867-0.7904 0.35946-1.0111 0.27499-0.83425 0.51672-1.6785 0.76169-2.5219 0.07787-0.27851 0.15677-0.55674 0.23363-0.83553 0.1315-0.47697 0.25478-0.95618 0.38644-1.4331 0.07986-0.28929 0.18908-0.6822 0.29789-0.97166 0.03726-0.0991 0.08493-0.19403 0.1274-0.29104 0.0462-0.0432 0.07715-0.11462 0.1386-0.12975 0.1322-0.0322 0.35776 0.21623 0.39525 0.261 0.11338 0.13541 0.20915 0.28472 0.30832 0.43085 0.30041 0.44268 0.5239 0.81609 0.80797 1.2754 0.77964 1.279 1.5625 2.5559 2.37 3.8176 0.09596 0.1613 0.25327 0.0677 0.15724-0.0937-0.73221-1.3097-1.4818-2.6108-2.3001-3.8691-0.30662-0.4479-0.548-0.82671-0.8951-1.2397-0.15306-0.1821-0.56861-0.70776-0.89876-0.62482-0.0751 0.0187-0.12407 0.0926-0.18608 0.13892-0.05659 0.0971-0.11988 0.19048-0.16977 0.29114-0.14612 0.29481-0.27668 0.66288-0.37958 0.96925-0.25067 0.7463-0.46156 1.5056-0.69049 2.2586-0.357 1.2497-0.69784 2.5042-0.94242 3.7817-0.0054 0.0223 0.01626 0.0275 0.0217 6e-3z",
						stroke-width=".21422"
					)
					path(
						d="m80.841 134.99c0.0049 0.0292 0.0098 0.0584 0.01461 0.0876 0.01168 0.0869 0.02123 0.1741 0.03496 0.26067 0.08471 0.53337 0.10118 0.44931 0.14482 1.096 0.04622 0.68491 0.04743 1.5072 0.05708 2.1839-0.1499 1.4057-0.15022 1.7001-0.43851 3.131-0.11508 0.57122-0.22139 1.1466-0.39486 1.7029-0.27331 0.87636-1.0005 2.3912-1.4549 3.1442-0.31984 0.53005-0.70783 1.0158-1.0618 1.5238-1.0494 1.3163-2.2554 2.4948-3.5766 3.536-0.3481 0.27431-0.71567 0.52295-1.0735 0.78442-0.57321 0.28643-0.29384 0.84549 0.27936 0.55906 0.3857-0.24041 0.78285-0.46336 1.1571-0.72124 1.4373-0.99041 2.7256-2.1702 3.8306-3.5229 0.97005-1.3764 1.3551-1.7683 2.0201-3.3274 0.27785-0.65143 0.50844-1.3242 0.69967-2.0061 0.26304-0.93778 0.48124-2.46 0.54143-3.439 0.03095-0.50255 0.0062-1.007 0.0092-1.5105-0.04049-0.39776-0.06582-0.79736-0.12148-1.1933-0.11088-0.7886-0.30142-1.5791-0.65377-2.2967-0.0075-0.0138-0.02112-6e-3 -0.01352 7e-3z"
					)

              
            
!

CSS

              
                /*
 * 20 January 2022
 * CSS 3D Donut
 * โœ” responsive, โœ” rotate (XZ), โœ” pan (XYZ)
 * โœ” 9 toggles, 81 possible appearances
 * mvp: 100 DIVs, 104 pseudo-elements, CSS gradients, mask and chained transforms
 * requires: the latest version of Firefox and Chrome
 */

:root {
	// === scene configuration ===
	--rotate-duration: 10s;
	--drop-shadow: rgba(0, 0, 0, 0.7);
	--ambient-light: rgba(0, 0, 0, 0.5);

	// === attr-toggle CSS configuration ===
	--accent: #488cfb;
	--accent-background: #31384d;
	--text: #fff;
	--text-secondary: rgba(255, 255, 255, 0.7);

	--controls-padding: 2vmin;
	--controls-transition-duration: 300ms;
	--controls-font-size: max(14px, 2.2vmin);
	--controls-line-opacity: 0.4;
	--controls-line-padding: 30%;
	--controls-line-height: 0.72em;
	--controls-margin-inline: 0.6em;
	--controls-margin-block: 0.8em;
}

// === camera configuration ===
[data-camera] {
	--cameraY: 41;
}

// === our subject material ===
.torus {
	--radius: 200;
	--thickness: 131;
	--border-width: 15;
	--color: #488cfb;
	--outline-color: #000;
	--sprinkle-color: #f7f7f770;
	--sprinkle-scale: 0.8;
	--sprinkle-mass: 12;
	--glare-mass: 53;

	position: absolute;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
}

// === toggles ===

// * === toggles: "Gradient Colors" ===
body:not([data-gradient-colors]) .torus {
	--gradient-colors: none;
}

body[data-gradient-colors] #toggle-donut-fill + label {
	opacity: 0.4;
	pointer-events: none;
}

// * === toggles: "Yummy Donut" ===
body[data-donut-fill] {
	--accent: hsl(23, 65%, 53%);
	--text: hsl(36, 79%, 92%);
	--text-secondary: hsla(36, 79%, 88%, 0.7);
	// --outline: 0 0 0 1px hsl(23, 66%, 45%);

	& .torus {
		--gradient-colors: linear-gradient(
			hsl(36, 79%, 84%),
			hsl(32, 67%, 56%) 62%,
			hsl(23, 65%, 53%) 77%
		);
		--color: #3a6eeba3;
	}

	&[data-gradient-colors] {
		--accent: #488cfb;
		--text: #fff;
		--text-secondary: rgba(255, 255, 255, 0.7);

		& .torus {
			--gradient-colors: var(--default-gradient-colors);
		}
	}
}

// * === toggles: "Outlines" ===
body:not([data-outlines]) .torus {
	--outline: none;
}

// * === toggles: "Wireframe" ===
body[data-wireframe] .torus {
	--m-image: linear-gradient(#000 0 0);
	--border-width: 3;
}

// * === toggles: "Preserve Blind Points" ===
body[data-pbp] .torus {
	--y-base: 98;
}

// * === toggles: "Lighting" ===
body[data-lights] .torus {
	--inner-shade-color: var(--ambient-light);
}

body:not([data-lights]) .torus {
	--lights: none;
}

// * === toggles: "Glare" ===
body:not([data-glare]) .torus {
	--glare-images: none;
	--glare-points: 0 0;
	--glare-size: 0 0;
}

// * === toggles: "Sprinkles" ===
body:not([data-sprinkles]) .torus::before {
	content: none;
}

// * === toggles: "Rotate" ===
body[data-rotate] [data-float] {
	animation-play-state: running;
}

body {
	// === add a drop shadow for realism ===
	filter: drop-shadow(
		calc(13 * var(--px)) calc(13 * var(--px)) calc(17 * var(--px))
			var(--drop-shadow)
	);

	// === the mask-image is disabled by default as it makes the object resource-intensive and drops fps ===
	& .torus {
		--m-image: none;
	}
}

// === scene defaults ===

label {
	transition-property: color, opacity;
}

html::before {
	background-image: radial-gradient(
		circle at 50% 50%,
		var(--accent-background),
		#000
	);
}

[data-scene] {
	background-color: transparent;
}

[data-float] {
	position: absolute;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	transform: rotateX(0turn) rotateY(0turn) rotateZ(0turn);
	animation: rotate linear var(--rotate-duration) forwards infinite;
	animation-play-state: paused;
	transform-style: preserve-3d;
}

@keyframes rotate {
	to {
		transform: rotateX(1turn) rotateY(2turn) rotateZ(3turn);
	}
}

// === decoration ===

@function rand($min, $max) {
	@return $min + math.random() * ($max - $min);
}

@function place-backgrounds($n, $quadrant: 1, $start: 1, $sprinkle: null) {
	$points: null;
	$one-fourth: 0.5 * math.$pi;
	$theta: devide($quadrant * $one-fourth, $n);

	@for $i from 1 through $n {
		$angle: ($theta * $i) + $one-fourth * ($start - 2);

		$multiplier: rand(0.98, 1.2);
		@if $sprinkle == 1 {
			$multiplier: rand(0.8, 1);
		}

		$x: calc(50% + 50% * #{math.cos($angle) * $multiplier});
		$y: calc(50% + 50% * #{math.sin($angle) * $multiplier});
		$points: $points, $x $y;
	}

	@return $points;
}

@function repeat($n, $value) {
	$values: null;
	@for $i from 1 through $n {
		$values: $values, $value;
	}

	@return $values;
}

// === torus geometry ===

@mixin torus {
	$glare-density: 8;
	$sprinkle-density: 200;

	--default-outline: 0 0 0 1px var(--outline-color, #000);
	--default-lights: linear-gradient(
		to right,
		transparent,
		var(--inner-shade-color, transparent)
	);
	--default-gradient-colors: conic-gradient(
		hsl(217, 96%, 63%),
		hsl(170, 71%, 51%),
		hsl(66, 96%, 49%),
		hsl(36, 100%, 53%),
		hsl(315, 75%, 57%),
		hsl(245, 65%, 61%),
		hsl(217, 96%, 63%)
	);
	--default-glare-color: rgba(255, 255, 255, 0.13);

	--calc-border-width: calc(var(--border-width) * var(--px));
	--calc-diameter: calc(var(--radius) * 2 * var(--px));
	--calc-thickness: calc(var(--thickness) * var(--px));
	--calc-half-thickness: calc(((var(--thickness) * 0.5) - 4) * var(--px));
	--calc-distance: calc((var(--radius) - (var(--thickness) * 0.5)) * var(--px));
	--calc-reverse-distance: calc(
		(var(--radius) - (var(--thickness) * 0.5)) * -2 * var(--px)
	);
	--calc-glare-mass: calc(var(--glare-mass) * var(--px));
	--calc-sprinkle-mass: calc(var(--sprinkle-mass) * var(--px));

	--glare-image: radial-gradient(
		circle at center,
		var(--glare-color, var(--default-glare-color)) 50%,
		transparent calc(50% + 1px)
	);
	--glare-images: #{repeat($glare-density, var(--glare-image))};
	--glare-points: #{place-backgrounds($glare-density, 1, -1)};
	--glare-size: #{repeat(
			$glare-density,
			var(--calc-glare-mass) var(--calc-glare-mass)
		)};

	--m-image: linear-gradient(#000 0 0);
	--m-origin: content-box, padding-box;

	width: var(--calc-diameter);
	height: var(--calc-diameter);

	&::before {
		content: "";
		position: absolute;
		left: 50%;
		top: 50%;
		width: 100%;
		height: 100%;
		border-radius: 50%;
		transform: translate(-50%, -50%) translateZ(var(--calc-half-thickness))
			scale(var(--sprinkle-scale));

		--sprinkle-image: radial-gradient(
			circle at center,
			var(--sprinkle-color) 50%,
			transparent calc(50% + 1px)
		);
		--sprinkle-images: #{repeat($sprinkle-density, var(--sprinkle-image))};
		--sprinkle-points: #{place-backgrounds($sprinkle-density, 4, 0, 1)};
		--sprinkle-size: #{repeat(
				$sprinkle-density,
				var(--calc-sprinkle-mass) var(--calc-sprinkle-mass)
			)};

		background-image: var(--sprinkle-images);
		background-position: var(--sprinkle-points);
		background-size: var(--sprinkle-size);
		background-repeat: no-repeat;
	}

	&,
	& .side {
		transform-style: preserve-3d;
	}

	& .side {
		--angle: calc((var(--i) / var(--n)) * 1turn);

		position: absolute;
		left: 50%;
		top: 50%;
		width: var(--calc-thickness);
		height: var(--calc-thickness);
		transform: translate(-50%, -50%) rotateZ(var(--angle))
			rotateX(calc(var(--y-base, 90) * 1deg)) translateX(var(--calc-distance));
		box-shadow: var(--outline, var(--default-outline));
		border-radius: 50%;

		&::before,
		&::after {
			content: "";
			position: absolute;
			left: 0;
			top: 0;
			width: 100%;
			height: 100%;
			border-radius: 50%;
			padding: var(--calc-border-width);
			transform: scaleX(-1);

			background-color: var(--color, #000);
			background-image: var(--glare-images), var(--lights, var(--default-lights)),
				var(--gradient-colors, var(--default-gradient-colors));
			background-position: var(--glare-points), 0 0, 0 0;
			background-size: var(--glare-size), 100% 100%, 100% 100%;
			background-repeat: no-repeat;

			mask-image: var(--m-image), var(--m-image);
			-webkit-mask-image: var(--m-image), var(--m-image);
			mask-origin: var(--m-origin);
			-webkit-mask-origin: var(--m-origin);
			mask-clip: var(--m-origin);
			-webkit-mask-clip: var(--m-origin);
			mask-composite: exclude;
			-webkit-mask-composite: destination-out;
		}

		&::before {
			transform: translateX(var(--calc-reverse-distance));
		}
	}
}

.torus {
	@include torus;
}

              
            
!

JS

              
                /*
 * ====
 * ==== Frequently asked questions ====
 * ====
 *
 * [1]. What is the Camera class?
 * ans: The `Camera` class is a custom API and a part of the control system that I'm using to enable user interaction such as "drag to rotate" and "pan"
 *
 * [2]. Gotcha! aren't you using JavaScript to do this?! ๐Ÿ˜›
 * ans: Apparently, I am. But I should clarify that the controller API has nothing to do with the 3D creation itself. It only updates CSS variables, namely `--camera*` based on mouse movements and touch gestures. The 3D structure you are seeing is entirely CSS.
 *
 * [3]. Nah, I disagree. You aren't using pure CSS. You're using Sass ๐Ÿ˜
 * ans: ๐Ÿคฆโ€โ™‚๏ธ Ah, man! Sass is a CSS compiler. I am particularly using the SCSS syntax. I'm writing SCSS instead of CSS to minimize repetition. You see, the nested structure keeps the code tidy and saves me from repeating the same code over and over. The compiled code is still pure CSS and with built-in CSS variables.
 *
 * [4]. Oh ๐Ÿ˜ณ ... okay. Soo, what's that "attrToggle" thing? ๐Ÿคจ
 * ans: Another part of the controller API. It "toggles" certain attributes/classes to customize the 3D creation dynamically.
 *
 * [5]. Cool! Do you have any plans to make the controller API public? ๐Ÿ˜€
 * ans: I would love to. The API is still experimental due to a lack of testing suite and developer force. I have been busy with my college stuff, so I can't work on it any time soon.
 *
 * [6]. Thanks for the conversation! Where can I find you later? ๐Ÿ˜€
 * ans: Maybe on Twitter? ๐Ÿ˜‰ DMs always open: @ShadowShahriar
 *
 */

window.addEventListener("load", () => {
	new Camera()
		.setOptimalPerspective()
		.with({
			debug: true,
			rotate: {
				speed: 1.2
			}
		})
		.init();

	new attrToggle("[data-controls]").init();
});

              
            
!
999px

Console