Forces and Steering

Forces are behaviors that run each tick and adjust a particle's velocity. Add as many as you like; they stack in the order you add them.

Vfx.emitter()
        .gravity(0f, -0.02f, 0f)
        .drag(0.05f)
        .curl(0.04f, 1.5f)
        .play(level, pos);

Method	Effect
`gravity(x, y, z)`	constant acceleration
`drag(amount)`	slows particles toward rest
`turbulence(strength, frequency)`	chaotic noise jitter
`curl(strength, frequency)`	divergence-free curl noise, a smoother fluid-like flow than turbulence
`attractor(x, y, z, strength)`	pull toward a point; a negative strength pushes away
`vortex(x, y, z, strength)`	swirl around the vertical axis through a point
`flock(radius, separation, alignment, cohesion, maxSpeed)`	boids: neighbors separate, align headings, and cohere

Attractor and vortex points are in emitter-local space, relative to the play position.

To add a force Cascade does not ship, write a custom component.

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