[SaraAki]

This plugin activate knockback on knife damage.What i want is that knockback work only when damage is done with right mouse click.Also,maybe there is a better way to create knockback than using event_damage?

PHP Code:

#include <amxmodx>
#include <engine>

#define PLUGIN    "Knife Knockback (when shot by one)"
#define VERSION    "1.0"
#define AUTHOR    "v3x & Chronic"

new cvar_pump_active , cvar_pump_force;

public plugin_init()
{
    register_plugin(PLUGIN , VERSION , AUTHOR);

    register_event("Damage" , "event_Damage" , "b" , "2>0");

    cvar_pump_active   = register_cvar("knife_knockback" , "1");
    cvar_pump_force       = register_cvar("knife_force"     , "10");
}

public event_Damage(id)
{
    if(!get_pcvar_num(cvar_pump_active))
        return PLUGIN_CONTINUE;

    if(!is_user_alive(id))
        return PLUGIN_CONTINUE;

    new weapon , attacker = get_user_attacker(id , weapon);

    if(!is_user_alive(attacker))
        return PLUGIN_CONTINUE;

    if(weapon == CSW_KNIFE)
    {
        new Float:vec[3];
        new Float:oldvelo[3];
        get_user_velocity(id, oldvelo);
        create_velocity_vector(id , attacker , vec);
        vec[0] += oldvelo[0];
        vec[1] += oldvelo[1];
        set_user_velocity(id , vec);
    }

    return PLUGIN_CONTINUE;
}

// Stock by the one and only, Chronic :P
stock create_velocity_vector(victim,attacker,Float:velocity[3])
{
    if(!is_user_alive(victim) || !is_user_alive(attacker))
        return 0;

    new Float:vicorigin[3];
    new Float:attorigin[3];
    entity_get_vector(victim   , EV_VEC_origin , vicorigin);
    entity_get_vector(attacker , EV_VEC_origin , attorigin);

    new Float:origin2[3]
    origin2[0] = vicorigin[0] - attorigin[0];
    origin2[1] = vicorigin[1] - attorigin[1];

    new Float:largestnum = 0.0;

    if(floatabs(origin2[0])>largestnum) largestnum = floatabs(origin2[0]);
    if(floatabs(origin2[1])>largestnum) largestnum = floatabs(origin2[1]);

    origin2[0] /= largestnum;
    origin2[1] /= largestnum;

    velocity[0] = ( origin2[0] * (get_pcvar_float(cvar_pump_force) * 3000) ) / get_entity_distance(victim , attacker);
    velocity[1] = ( origin2[1] * (get_pcvar_float(cvar_pump_force) * 3000) ) / get_entity_distance(victim , attacker);
    if(velocity[0] <= 20.0 || velocity[1] <= 20.0)
        velocity[2] = random_float(200.0 , 275.0);

    return 1;
}