Available since LÖVE 0.9.1
This function is not supported in earlier versions.
Sets whether particle angles and rotations are relative to their velocities. If enabled, particles are aligned to the angle of their velocities and rotate relative to that angle.
ParticleSystem:setRelativeRotation( enable )
boolean enable
Nothing.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://love2d.org/wiki/ParticleSystem:setRelativeRotation