[Scherzo]

I need to check if player stuck after use 10s NoClip mode and was looking for answer at question: how to check it? I found code of RTD, but in source was checked by run timer,force move and compare last with current origin...too complicated for me.

So started to seach other way and I think found it.

When player can`t move, stuck by other entity his flTimeStepSound go to 0. We have to little delay check function to give time for engine. There is one more situation, which flTimeStepSound is 0 - falling down, so we should check Z axis of velocity too.

Tested with silent footsteps too.

Fakemeta Way

#include <amxmodx>
#include <fakemeta>

#define PLUGIN "NoClip"
#define VERSION "1.0"
#define AUTHOR "R3X"

#define TASK_NOCLIP 14000


public plugin_init() {
    register_plugin(PLUGIN, VERSION, AUTHOR)
    
    register_clcmd("+noclip","cmdStartNoClip");
    register_clcmd("-noclip","cmdStopNoClip");
}
public cmdStartNoClip(id){
    if(is_user_alive(id)){
        set_pev(id, pev_movetype, MOVETYPE_NOCLIP);
    
        new tid=id+TASK_NOCLIP;
        if(task_exists(tid))
            remove_task(tid);
    }
    return PLUGIN_HANDLED;
}
public cmdStopNoClip(id){
    set_pev(id, pev_movetype, MOVETYPE_WALK);
    
    new tid=id+TASK_NOCLIP;
    set_task(1.0, "taskStuck",tid);
    
    return PLUGIN_HANDLED;
}
public taskStuck(id){
    id -= TASK_NOCLIP;
    static velocity[3];
    pev(id, pev_velocity, velocity);
    if(pev(id, pev_flTimeStepSound) == 0 && velocity[2]==0.0){
        new szName[32];
        get_user_name(id, szName, 31);
        client_print(0, print_chat, "%s stuck, so will die :(", szName);
        user_kill(id);
    }
}

Engine Way

#include <amxmodx>
#include <engine>

#define PLUGIN "NoClip"
#define VERSION "1.0"
#define AUTHOR "R3X"

#define TASK_NOCLIP 14000


public plugin_init() {
    register_plugin(PLUGIN, VERSION, AUTHOR)
    
    register_clcmd("+noclip","cmdStartNoClip");
    register_clcmd("-noclip","cmdStopNoClip");
}
public cmdStartNoClip(id){
    if(is_user_alive(id)){
        entity_set_int(id, EV_INT_movetype, MOVETYPE_NOCLIP);
    
        new tid=id+TASK_NOCLIP;
        if(task_exists(tid))
            remove_task(tid);
    }
    return PLUGIN_HANDLED;
}
public cmdStopNoClip(id){
    entity_set_int(id, EV_INT_movetype, MOVETYPE_WALK);
    
    new tid=id+TASK_NOCLIP;
    set_task(1.0, "taskStuck",tid);
    
    return PLUGIN_HANDLED;
}
public taskStuck(id){
    id -= TASK_NOCLIP;
    static velocity[3];
    entity_get_vector(id, EV_VEC_velocity, velocity);
    if(entity_get_int(id, EV_INT_flTimeStepSound) == 0 && velocity[2]==0.0){
        new szName[32];
        get_user_name(id, szName, 31);
        client_print(0, print_chat, "%s stuck, so will die :(", szName);
        user_kill(id);
    }
}