// Xon 0.7: 24+2
// Samual: 31 (just below 32, keeping things smooth without allowing 32qu steps)
+// jump duration == 2*sv_jumpvelocity / sv_gravity
+// in this case: 0.6888888888 (thus either 20 or 21 frames)
// jump height == sv_jumpvelocity^2 / (2*sv_gravity)
// in this case: 42.71
// player: 24+45 qu