Block Attacking Sandbags in some places

Hello, i am try to create a system that i can block zombie to attack sandbag in the lower (Sorry For My Bad English)

i do this simple function to check the attacker v_ angles is that right, if im wrong or this is not the system let me know please

// This Feature Still In Test So It Cause Some False Blocks

CheckHitAttacks(this)

{

new Float:szAngles[3]

entity_get_vector(this, EV_VEC_v_angle, szAngles)



if(szAngles[0] < 0.25)

return true;



return false;

}