[Convex]

Код:

#define PRESSED(%0) \
	(((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))

and jump key

Код:

if(PRESSED(KEY_JUMP))
    {
    new Float:P[3];
    GetPlayerPos(playerid,P[0],P[1],P[2]);
    GetPlayerVelocity(playerid,P[0],P[1],P[2]);
    SetPlayerVelocity(playerid,P[0],P[1],P[2]+5.0);
    }

	return 1;
}

have fun ! xd