This is a graphics demo that shows animated fireworks. I wrote it for two reasons: to see what Swift can do, and for something new and fun (I never do 3D graphics in my day job).

This uses the "Metal" low-level 3D graphics API.

Video: Watch On Youtube

Get a .dmg from the release page

• 60 FPS (2015 Mac Book)

• Silky smooth "global time" rendering; no step-based ticks with floating point errors. This also lets you pause and rewind time.

• Calculates gravity and air drag

• Uses alpha blending

• Two kinds of fireworks: twinkle out and plume trail

Press space to pause time. Press j and k to step time forward and backward by 1/60th of a second.

(c) 2015 Karl Pickett