[ConnorMcLeod]

Working version with less code, with smoth moves :

PHP Code:

#include <amxmodx>
#include <engine>
#include <fakemeta>
#include <fun>
#include <hamsandwich>

#define VERSION "0.0.1"

#define MAX_PLAYERS    32

#define    m_flWait        42

#define USE_TOGGLE 3

new g_iCam[MAX_PLAYERS+1]
new g_iMaxPlayers

public plugin_init()
{
    register_plugin("Camera View", VERSION, "ConnorMcLeod")

    register_clcmd("say /cam", "cam")
    register_think("trigger_camera", "Camera_Think")
    g_iMaxPlayers = get_maxplayers()
}

public cam( id )
{
    if( !is_user_alive(id) )
    {
        return
    }
    new iEnt = g_iCam[id]
    if( !is_valid_ent(iEnt) )
    {
        iEnt = create_entity("trigger_camera")

        entity_set_int(iEnt, EV_INT_spawnflags, SF_CAMERA_PLAYER_TARGET|SF_CAMERA_PLAYER_POSITION)

        DispatchSpawn(iEnt)
        set_pdata_float(iEnt, m_flWait, 999999.0, 4)

        g_iCam[id] = iEnt
    }

    ExecuteHam( Ham_Use, iEnt, id, id, USE_TOGGLE, 1.0)

    entity_set_int(id, EV_INT_flags, entity_get_int(id, EV_INT_flags) & ~FL_FROZEN)
    cs_reset_user_maxspeed(id)
}

public client_disconnect(id)
{
    new iEnt = g_iCam[id]
    if( !is_valid_ent(iEnt) )
    {
        g_iCam[id] = 0
        remove_entity(iEnt)
    }
}

cs_reset_user_maxspeed(id)
{
    new Float:flMaxSpeed;
    switch ( get_user_weapon(id) )
    {
        case CSW_SG550, CSW_AWP, CSW_G3SG1 : flMaxSpeed = 210.0;
        case CSW_M249 : flMaxSpeed = 220.0;
        case CSW_AK47 : flMaxSpeed = 221.0;
        case CSW_M3, CSW_M4A1 : flMaxSpeed = 230.0;
        case CSW_SG552 : flMaxSpeed = 235.0;
        case CSW_XM1014, CSW_AUG, CSW_GALIL, CSW_FAMAS : flMaxSpeed = 240.0;
        case CSW_P90 : flMaxSpeed = 245.0;
        case CSW_SCOUT : flMaxSpeed = 260.0;
        default : flMaxSpeed = 250.0;
    }
    set_user_maxspeed(id, flMaxSpeed);
}

get_cam_owner(iEnt)
{
    static id
    for(id = 1; id<=g_iMaxPlayers; id++)
    {
        if( g_iCam[id] == iEnt )
        {
            return id
        }
    }
    return 0
}

public Camera_Think(entid)
{
    new id = get_cam_owner(entid);
    if( !id )
    {
        return
    }

    static Float:origin[3], Float:angle[3], Float:vBack[3];
    entity_get_vector( id, EV_VEC_origin, origin );
    entity_get_vector( id, EV_VEC_v_angle, angle );

    angle_vector( angle, ANGLEVECTOR_FORWARD, vBack );

    origin[2] += 20.0; //So we're closer to the eyes.

    //Move back to see ourself (150 units)
    origin[0] += (-vBack[0] * 150.0);
    origin[1] += (-vBack[1] * 150.0);
    origin[2] += (-vBack[2] * 150.0);

    entity_set_origin( entid, origin );
    entity_set_vector( entid, EV_VEC_angles, angle );  

    entity_set_float(entid, EV_FL_nextthink, get_gametime())
}