Removed in LÖVE 0.9.0
It has been replaced by ParticleSystem:setLinearAcceleration.
Sets the gravity affecting the particles (acceleration along the y-axis). Every particle created will have a gravity between min and max.
ParticleSystem:setGravity( min, max )
Nothing.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://love2d.org/wiki/ParticleSystem:setGravity