Disable 3D buildings during runtime

[demiantres]

Is it possible to disable 3D buildings during runtime? Especially in the "TILE" and "RASTER" map modes buildings are either not useful, or create problems along tile borders.

[louwers]

Yes you can modify styles at runtime. Just remove the fill extrusion layer of your style.

Not sure what you mean by "TILE" and "RASTER" map modes buildings.

[demiantres]

Thanks for your answer. I see these options:

1.) #define "MBGL_LAYER_FILL_EXTRUSION_DISABLE_ALL" or
2.) Hide on a style basis:

    for (const auto& layer : m_map->getStyle().getLayers())
    {
        if (layer->getID() == "Building 3D")
        {
            layer->setVisibility(mbgl::style::VisibilityType::None);
        }
    }

[demiantres]

With "TILE" and "RASTER" I mean MapMode::Tile, MapOptions().withMapMode(MapMode::Tile).

[acalcutt]

Tileserver-GL does something like this for maplibre-native rendered rasters. I had considered removing this at one point, but without pitch the buildings look kind of ugly.
https://github.com/maptiler/tileserver-gl/blob/master/src/serve_rendered.js#L1265-L1275

[demiantres]

Here is the same with MapLibre native:

#include <mbgl/style/layers/fill_extrusion_layer.hpp>

if (layer->getID() == "Building 3D" || layer->getID() == "Building")
{
	auto extrusionLayer = dynamic_cast<mbgl::style::FillExtrusionLayer*>(layer);
	if (extrusionLayer)
	{
		extrusionLayer->setFillExtrusionHeight(mbgl::style::PropertyValue<float>(0));
		extrusionLayer->setFillExtrusionBase(mbgl::style::PropertyValue<float>(0));
	}
}