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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...
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Moving/Scrolling/Sliding Background in HTML5 Canvas
Sometimes your game or canvas experiment might have one or more layers of animating backgrounds that are set in motion for the player’s movement or some other reason (like creating a parallax effect?)....
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Canvas Text Gradients for Backgrounds and Strokes
Text gradients are super easy to achieve with HTML5 Canvas. Process Here’s the process: Step 1 Create your CanvasGradient object with createLinearGradient. Step 2 Add your Gradient Color Stops. Step 3...
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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...
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Canvas Rotating and Scaling Images Around a Particular Point
Transforming objects in your HTML5 Game or Experiment requires a bit of understanding regarding how they work. The behaviour and end result is not as intuitive as CSS3 transform functions like rotate()...
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Different Tools for Our Sketching Application
It is important for our painting application to have different tools like: Line tool to draw straight lines. Rectangle tool to draw rectangles. Circle tool to draw circles. Eraser tool for erasing...
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Rendering Animations with Moving Objects on Canvas
Moving objects on HTML5 Canvas is really easy. I should have written on this topic before writing on gravity but it’s never too late! Let’s get started with the basics. Canvas Coordinate System I’ll...
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Optimizing HTML5 Canvas to Improve your Game Performance
So, I have coded a game this month for the github game compo. Named it “Pappu Pakia“. My first HTML5 Game with beautiful graphics by Kushagra. When I was done coding, it was pretty exciting until I...
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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...
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Fixing Node Mysql “Error: Cannot enqueue Handshake after invoking quit.”
TL;DR You need to establish a new connection by calling the createConnection method after every disconnection. I was using the popular Mysql module for Node.js which is node-mysql and everytime, after...
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Parsing CSS In Javascript
Recently I have been working on a project where a user can change some values inside a UI widget via form elements like input fields, range, etc. that would in turn change CSS code inside a CodeMirror...
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Time Based Animations in HTML5 Games: Why and How to Implement them
If you’re new to web based games development, especially HTML5 games, then you might be dealing with slow performance on low end devices like mobile phones, tablets, old laptops etc. This is a general...
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Games Physics: Basics and Implementation of Predictive Collision Detection
Few days ago, I wrote a post about why time based animations are better than frame based animations. However, in animations done as a function of time, some serious problems could arise. One of them is...
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Scaling Your HTML5 Canvas to Fit Different ViewPorts (or Resolutions)
I am going to share a neat little trick that was learnt while working on an HTML5 game recently. The game is pretty much like our HTML5 Doodle Jump. We had to make sure that the game scales down very...
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Remote Mobile Web Application Debugging with Weinre
Weinre (WEb INspector REmote) – pronounced as ‘winery’ – is an excellent tool that reuses the code from the webkit web inspector to allow remote webpage debugging (basically what firebug or chrome dev...
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Using Adobe Edge Inspect for Cross-Device Web Page Debugging and Synchronized...
Using Adobe Edge Inspect you can inspect your webpages (like you do in chrome dev tools) across various remote devices (mobiles, tablets, etc.). You basically connect multiple iOS or Android devices to...
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How To Use Twitter OAuth with node-oauth in your Node.js / Express Application
I am building a Node.js application where I want the users to be able to signup with their twitter credentials rather than remembering another set of username/pasword. My framework of choice is...
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Remote Web App JavaScript Debugging with JSConsole.com
I’ve written a few posts on remote debugging before, using edge inspect and weinre. They’re definitely very good at the problem they try to solve but today I came across a new Javascript-only remote...
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Run CoffeeScript Node.js Apps on Heroku
If you’ve written your Node.js app in coffeescript entirely and at the time of deploying on Heroku wondering how heroku would execute your coffee code, then here’s the simple process that you need to...
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Using CoffeeScript over JavaScript in your Node.js Application or Module
If you’ve wanted to code your next Node.js app in CoffeeScript then it ain’t that hard. Since coffeescript is just a little language that compiles down to javascript it is pretty much compatible with...
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