#include <amxmodx>
#include <engine>
#include <hamsandwich>
#define FALL_VELOCITY 350.0

public plugin_init() {
register_plugin("No fall damage", "0.2", "v3x");
if(!cvar_exists("mp_falldamage")) {
register_cvar("mp_falldamage", "0");
}
}

new bool:falling[33];

public client_PreThink(id) {
if(get_cvar_num("mp_falldamage") == 0
&& is_user_alive(id)
&& is_user_connected(id)) {
if(entity_get_float(id, EV_FL_flFallVelocity) >= FALL_VELOCITY) {
falling [id]= true;
} else {
falling [id]= false;
}
}
}

public client_PostThink(id) {
if(get_cvar_num("mp_falldamage") == 0
&& is_user_alive(id)
&& is_user_connected(id)
&&(get_user_flags(id) & ADMIN_LEVEL_E) ) //меняем на свое значение
{
if(falling[id]) {
entity_set_int(id, EV_INT_watertype, -3);
}
}
}