OnScreenEdge()

//Returns true of an object is touching a screen edge.
//Specify the size of the object in pixels, or pass HitWidth, HitHeight; or EffectWidth, EffectHeight.
bool OnScreenEdge(lweapon l, int width, int height){
    if ( l->X <= SCREEN_LEFT ) return true;
    if ( ( l->X + width ) >= SCREEN_RIGHT ) return true;
    if ( l->Y <= SCREEN_TOP ) return true;
    if ( ( l->Y + height ) >= SCREEN_BOTTOM ) return true;
    return false;
}

bool OnScreenEdge(eweapon l, int width, int height){
    if ( l->X <= SCREEN_LEFT ) return true;
    if ( ( l->X + width ) >= SCREEN_RIGHT ) return true;
    if ( l->Y <= SCREEN_TOP ) return true;
    if ( ( l->Y + height ) >= SCREEN_BOTTOM ) return true;
    return false;
}

bool OnScreenEdge(npc l, int width, int height){
    if ( l->X <= SCREEN_LEFT ) return true;
    if ( ( l->X + width ) >= SCREEN_RIGHT ) return true;
    if ( l->Y <= SCREEN_TOP ) return true;
    if ( ( l->Y + height ) >= SCREEN_BOTTOM ) return true;
    return false;
}

bool OnScreenEdge(item l, int width, int height){
    if ( l->X <= SCREEN_LEFT ) return true;
    if ( ( l->X + width ) >= SCREEN_RIGHT ) return true;
    if ( l->Y <= SCREEN_TOP ) return true;
    if ( ( l->Y + height ) >= SCREEN_BOTTOM ) return true;
    return false;
}

bool OnScreenEdge(ffc l, int width, int height){
    if ( l->X <= SCREEN_LEFT ) return true;
    if ( ( l->X + width ) >= SCREEN_RIGHT ) return true;
    if ( l->Y <= SCREEN_TOP ) return true;
    if ( ( l->Y + height ) >= SCREEN_BOTTOM ) return true;
    return false;
}