bool changeAlpha (GameObject obj)
{
if (obj != null) {
Vector3 posObj = obj.transform.position;
if ((transform.position.x - posObj [0]) > marge || (posObj [0] - player.transform.position.x) > marge && (transform.position.z - posObj [2]) > marge || (posObj [2] - player.transform.position.z) > marge) {
//no transparent
obj.renderer.material.shader = Shader.Find ("Diffuse");
return true;
} else {//transparent
return false;
}
} else {
return true;
}
}