onscreen = 0;
if (x > (view_xview[view_current] - argument0) && x < (view_xview[view_current] + view_wview[view_current] + argument0))
{
    if (y < (view_hview[view_current] + view_yview[view_current] + argument1) && y > (view_yview[view_current] - argument1))
        onscreen = 1;
}