Kah Shiu Chong - Envato Tuts+ Profile

Tutorials

How to Detect When an Object Has Been Circled by a Gesture
You're never too old for a game of Spot the Difference—I remember playing it as a kid, and I now find my wife still plays it occasionally! In this tutorial,...
Kah Shiu Chong
25 Aug 2012
Code
Collision Detection Using the Separating Axis Theorem
The Separating Axis Theorem is often used to check for collisions between two simple polygons, or between a polygon and a circle. As with all algorithms, it...
Kah Shiu Chong
6 Aug 2012
Code
The Math and ActionScript of Curves: Gradients and Normals
We've tackled drawing curves, and finding their quadratic and cubic roots, as well as handy applications for using quadratic roots within games. Now, as...
Kah Shiu Chong
20 Jun 2012
Code
The Math and ActionScript of Curves: Roots
In the first tutorial of this series, we took a look at drawing curves using equations and AS3. Now, we're going to tackle solving those equations to find...
Kah Shiu Chong
15 Jun 2012
Code
The Math and ActionScript of Curves: Drawing Quadratic and Cubic Curves
We see lines used in a lot of scenarios. Curves are also used, although perhaps not as frequently - but that doesn't undermine their importance! In this...
Kah Shiu Chong
21 May 2012
Code
Pixel-Level Collision Detection Based on Pixel Colors
In this tutorial, I'll follow the approach suggested by Richard Davey (Thanks, Richard!), and used by him and others, in detecting collisions between bitmaps...
Kah Shiu Chong
12 Apr 2012
Code
Predicting Collision Points With Math in AS3
In my previous tutorial about collision detection between a circle and a line, I covered projection on a line using the dot product of a vector. In this...
Kah Shiu Chong
5 Apr 2012
Code
Starling Particle Effects for Stage3D Shooter Games
I'm sure Stage3D is not foreign to most readers; it's the new API that gives AS3 programmers access to the GPU. However, coding against opcodes in Stage3D...
Kah Shiu Chong
17 Mar 2012
Code
Understanding Affine Transformations With Matrix Mathematics
Inspired by Prof. Wildberger in his lecture series on linear algebra, I intend to implement his mathematical ideas with Flash. We shall not delve into the...
Kah Shiu Chong
17 Feb 2012
Code
Pixel-Level Collision Detection
Up until now, our collision detection methods have been mathematically based. Although this is helpful, there are cases where the mathematical approach is...
Kah Shiu Chong
14 Feb 2012
Code
Vector Regions: Hiding From a Field of View
Previously, we explored the approach of using vector regions to implement the field of view of a turret. Troops approached the turret on open field and no...
Kah Shiu Chong
30 Jan 2012
Code
Quick Tip: Collision Reaction Between a Circle and a Line Segment
In the previous Quick Tips, we've looked at collision detection: essentially, detecting that two shapes have overlapped. Now, we're ready to look at...
Kah Shiu Chong
20 Jan 2012
Code