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Design & animate a pseudo 3D “Super Mario” with JavaScript (Zdog)

Last modified September 14th 2021 | #zdog | GitHub Source Code [GitHub]

I recently stumbled upon Zdog a 3D JavaScript engine for rendering simple 3D models on the Web. After playing around with the basic concepts I thought I’d attempt to design and animate an 8-bit style Super Mario.

To get started quickly I just installed Zdog via CDN but it’s also available via NPM.

<script src="https://unpkg.com/zdog@1/dist/zdog.dist.min.js"></script>
Code language: HTML, XML (xml)

Once Zdog was installed I created the required <canvas> HTML element:

<canvas class="zdog-canvas" width="300" height="300"></canvas>
Code language: HTML, XML (xml)

Next a new illustration was created that will render the final design to the zdog-canvas:

let illo = new Zdog.Illustration({ element: ".zdog-canvas" }); illo.updateRenderGraph();
Code language: JavaScript (javascript)

Here’s how a single 3d box is created in Zdog:

new Zdog.Box({ addTo: illo, width: 10, height: 10, depth: 10, stroke: false, color: "#000", translate: { x: 0, y: 0 }, });
Code language: CSS (css)

To create Mario I’ll need to create a series of these boxes in a number of different colors and then position them by setting the x & y axis location. Here’s an image that shows each of the boxes (pixels) required to create Mario:

8-Bit Super Mario

In total there are 144 boxes with 7 colors that will need to be rendered.

Next I defined variables for each of the colors:

const red = "#ff0000"; const blue = "#001cff"; const yellow = "#fffe00"; const black = "#000000"; const skin = "#ffaa7d"; const hair = "#340d00"; const shoe = "#5d2914";
Code language: JavaScript (javascript)

Then created an array to store objects with the values for each box:

const mario = [ // column 1 { x: -60, y: 10, color: blue }, { x: -60, y: 20, color: skin }, { x: -60, y: 30, color: skin }, { x: -60, y: 40, color: skin }, { x: -60, y: 70, color: shoe }, ];
Code language: JavaScript (javascript)

This created the 5 boxes required for the first column, in total there are 12 columns (view full code here). I can now loop over each object adding a 10x10x10 box with the defined color and x/y position values to the illustration:

mario.forEach(function (block) { new Zdog.Box({ addTo: illo, width: 10, height: 10, depth: 10, stroke: false, color: block.color, translate: { x: block.x, y: block.y }, }); });
Code language: PHP (php)

Here’s what Mario looks like at this stage:

Zdog static Mario Illustration

To complete the design I added some animation so Mario rotates in 3D:

function animate() { illo.rotate.y += isSpinning ? 0.05 : 0; illo.updateRenderGraph(); requestAnimationFrame(animate); } animate();
Code language: JavaScript (javascript)
Zdog Super Mario

Hopefully this tutorial has sparked your interest in Zdog and you start creating your own 3D models for the web. You can view a range of other examples and read the full Zdog documentation here.

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