html5 - Code Theory

Optimizing HTML5 Canvas to Improve your Game Performance

So I coded a game this month for the github game compo called “Pappu Pakia“. This is my first HTML5 Game with beautiful graphics by Kushagra. When I was finished with the coding part, it was pretty exciting until I played it a few times when my CPU was busy, then on an old laptop and finally on a mobile device. In all the cases it was laggy, except in the last one where it was super slow. So what do we do now ? Time to Optimize!

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HTML5 Canvas and Friction

So you started moving an object on your canvas by manipulating vx and vy, i.e., velocity on the x and y axis. But then, you just realized that in real world scenarios the speed of an object reduces with time, if there’s no continuous acceleration. Even with an acceleration of X, there will be some friction faced counter-affecting the acceleration.

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Controlling the Frame Rate with requestAnimationFrame

Limiting the frame rate while using requestAnimationFrame can be a common want especially when coding Games where you want your animations and mechanics to not exceed a particular mark of frames per second. Let’s go through 2 ways of doing it.

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Basics of Implementing Gravity with HTML5 Canvas

Gravity

When creating some canvas experiments like a particle emission system or a game, gravity can be a key feature to implement. Figuring out how to implement gravity on an object in terms of coding can be a bit confusing. We’ll try to comprehend it, by putting it into code in a simplified manner. I liek simplicity!

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HTML5 Canvas Particles Fountain Explosion with Gravity

One of my previous posts talked about implementing gravity in our canvas experiments. Eventually, we made a realistic bouncing ball. We’ll kind of extend that experiment to make a quick fountain explosion on canvas obeying gravity.

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Drawing Text on HTML5 Canvas

draw text on canvas

Writing Text on canvas is pretty straightforward. All we need to know about is certain properties and methods that are pre-defined on the canvas’s context. You can draw/write all unicode characters using the related methods.

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HTML5 Canvas Drawing Lines with Smooth Edges

In the previous post we kicked off with our painting application using HTML5 canvas. If you remember well, we ended up with a basic app where one can easily draw lines or something else with a “pencil” tool. But there was a problem. When drawing different shapes like circles, the lines/curves had jagged edges. They were not smooth or anti-aliased, whatever you want to call them. This article will aim towards solving those issues.

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