Question

Anybody has any idea how to make a fireworks effect by drawing on canvas?
There is one nice example in wireworks live wallpaper (free app).

There, many points move and leave trails in a star like explosion and gradually disappear. I think that there is some kind of motion blur on each point moving, which I am not sure how to create.

Any ideas or links to relevant examples are welcome.

Answer 1

That’s a very abstract (and interesting) question but far too complex to answer in details.

What you’re really looking for is probably a sort of a modified particle system. A particle system is basically an engine for particles that includes a physics engine.

However, what you should focus on are these:

• Memory Pool pattern – useful for fireworks since you don’t want to allocate objects during runtime.
• Particle system tutorial – great and the tutorial is specifically for Android.
• Particle system – great, but for C++.

Once you built it (or gotten an understanding about it) you can easily convert it to the Canvas system, although OpenGL is the preferable alternative.