Display 3D buildings | Maps SDK | Android Docs

Extrude the building layer in the Mapbox Light style using FillExtrusionLayer and set up the light position.
Kotlin
FillExtrusionActivity.kt

package com.mapbox.maps.testapp.examples.terrain3D

import android.graphics.Color
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.mapbox.geojson.Point
import com.mapbox.maps.CameraOptions
import com.mapbox.maps.MapboxExperimental
import com.mapbox.maps.Style
import com.mapbox.maps.extension.style.expressions.generated.Expression.Companion.eq
import com.mapbox.maps.extension.style.expressions.generated.Expression.Companion.get
import com.mapbox.maps.extension.style.expressions.generated.Expression.Companion.literal
import com.mapbox.maps.extension.style.layers.addLayer
import com.mapbox.maps.extension.style.layers.generated.FillExtrusionLayer
import com.mapbox.maps.extension.style.light.generated.ambientLight
import com.mapbox.maps.extension.style.light.generated.directionalLight
import com.mapbox.maps.extension.style.light.setLight
import com.mapbox.maps.testapp.databinding.ActivityFillExtrusionBinding

/**
 * Extrude the building layer in the Mapbox Light style using FillExtrusionLayer
 * and set up the light position.
 */
class FillExtrusionActivity : AppCompatActivity() {

  private var isRedColor: Boolean = false
  private lateinit var binding: ActivityFillExtrusionBinding

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    binding = ActivityFillExtrusionBinding.inflate(layoutInflater)
    setContentView(binding.root)
    val mapboxMap = binding.mapView.mapboxMap
    mapboxMap.setCamera(
      CameraOptions.Builder()
        .center(Point.fromLngLat(-74.0066, 40.7135))
        .pitch(45.0)
        .zoom(15.5)
        .bearing(-17.6)
        .build()
    )

    mapboxMap.loadStyle(
      Style.LIGHT
    ) { style ->
      setupBuildings(style)
      setupLights3D(style)
    }
  }

  private fun setupLights3D(style: Style) {
    // setup 3d light
    val ambientLight = ambientLight {
      color(Color.BLUE)
      intensity(0.9)
    }
    val directionalLight = directionalLight {
      color(Color.YELLOW)
      intensity(0.9)
      castShadows(true)
      direction(listOf(0.0, 15.0))
    }
    style.setLight(ambientLight, directionalLight)
    // change color on fab click
    binding.fabLightColor.setOnClickListener {
      isRedColor = !isRedColor
      if (isRedColor) {
        ambientLight.color(Color.RED)
      } else {
        ambientLight.color(Color.BLUE)
      }
    }

    binding.fabLightPosition.setOnClickListener {
      directionalLight.direction(listOf(0.0, (directionalLight.direction!![1] + 5.0) % 90.0))
    }
  }

  @OptIn(MapboxExperimental::class)
  private fun setupBuildings(style: Style) {
    val fillExtrusionLayer = FillExtrusionLayer("3d-buildings", "composite")
    fillExtrusionLayer.sourceLayer("building")
    fillExtrusionLayer.filter(eq(get("extrude"), literal("true")))
    fillExtrusionLayer.minZoom(15.0)
    fillExtrusionLayer.fillExtrusionColor(Color.parseColor("#aaaaaa"))
    fillExtrusionLayer.fillExtrusionHeight(get("height"))
    fillExtrusionLayer.fillExtrusionBase(get("min_height"))
    fillExtrusionLayer.fillExtrusionOpacity(0.6)
    fillExtrusionLayer.fillExtrusionAmbientOcclusionIntensity(0.3)
    fillExtrusionLayer.fillExtrusionAmbientOcclusionRadius(3.0)
    fillExtrusionLayer.fillExtrusionEdgeRadius(0.6)
    style.addLayer(fillExtrusionLayer)
  }
}
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