Test purpose
- Create a point emitter which generates new particles that take their initial positions from existing particles.
- Check that the generated particles move only at specific angles (multiples of 45 degrees)
- Check that the tween correctly updates the color range for new particles
Known issue: the Demo in Firefox differs from other browsers as that browser is less tolerant to retaining previous paints during the clear stage of the Display cycle (based on the Cell wrapper's 'clearAlpha' attribute's value).
Annotated code