spring force

[mdipierro]

This line https://github.com/idmillington/cyclone-physics/blob/master/src/fgen.cpp#L106

magnitude = real_abs(magnitude - restLength);

should be

magnitude = magnitude - restLength;

The force should become repulsive when magnitude is less than restLength. Consistently with the book.

[EricPolman]

Thanks a lot! Fixed the issue to which I couldn't find a solution. :)

[Determinant]

Same problem here: https://github.com/idmillington/cyclone-physics/blob/c%2B%2B11/src/pfgen.cpp#L83