Function clearFilter

plugins/buildingplan/buildingplan.cpp:798–808

}

static void clearFilter(color_ostream &out, df::building_type type, int16_t subtype, int32_t custom, int index) {
    TRACE(control,out).print("entering clearFilter\n");
    BuildingTypeKey key(type, subtype, custom);
    auto &filters = get_item_filters(out, key);
    if (index < 0 || filters.getItemFilters().size() <= (size_t)index)
        return;
    ItemFilter filter = filters.getItemFilters()[index];
    filter.clear();
    filters.setItemFilter(out, filter, index);
    Lua::CallLuaModuleFunction(out, "plugins.buildingplan", "signal_reset");
}

static int setMaterialMaskFilter(lua_State *L) {
    color_ostream *out = Lua::GetOutput(L);