burstDirectionDegrees property
final
Directional burst / fountain cone — degrees where 0 = east (right),
90 = south (down), -90 = north (up). When null, Preset.nova
uses a full 360° spray (typical “up” aim uses -90).
Directional presets (Preset.cascade, Preset.flare, Preset.crossfire) use fixed aim unless overridden here.
Implementation
final double? burstDirectionDegrees;