beParticles

beParticles is a particle system implemented in pure Lua for Bitty Engine. It is ported from MaxwellDexter/pico-ps.

The idea is to port the original PICO-8 implementation to Bitty Engine in as few modification as possible, it is done with an extended Luax to regular Lua compiler and a compatibility layer. It makes it easy to synchronize with future version.

Try it out in browser.

Features

"beParticles" implements:

• Continuous emissions (default)
• Burst emissions
• Gravity
• Random colors
• Speed over lifetime and speed spread
• Life spread
• Angles and angle spread
• Size over lifetime and size spread
• Emission areas
• Color over life
• Sprite animation
• Random sprites
• Object Pooling

Glance

Play in browser.

Usage

Setup:

1. Clone this repository or download from releases
2. Open "src" directly or import it to your own projects with Bitty Engine
3. See code and comments for details

Code:

See MaxwellDexter/pico-ps for details.

Note:

Bitty Engine uses the standard Lua coordinates where rotation angle starts from X+ and grows clockwise, with range of values from 0 to 2 * PI.

beParticles (pico-ps) starts from X+ but grows anticlockwise, with range of values from 0.0 to 1.0.