Realistic lighting and shadows

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/*
 * Copyright 2020 Esri
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.esri.arcgisruntime.sample.realisticlightingandshadows

import android.os.Bundle
import android.view.MotionEvent
import android.view.View
import android.widget.*
import androidx.appcompat.app.AppCompatActivity
import androidx.coordinatorlayout.widget.CoordinatorLayout
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment
import com.esri.arcgisruntime.layers.ArcGISSceneLayer
import com.esri.arcgisruntime.mapping.*
import com.esri.arcgisruntime.mapping.view.*
import com.esri.arcgisruntime.sample.realisticlightingandshadows.databinding.ActivityMainBinding
import com.google.android.material.floatingactionbutton.FloatingActionButton
import java.text.SimpleDateFormat
import java.util.*
import kotlin.math.floor

class MainActivity : AppCompatActivity() {

    private val activityMainBinding by lazy {
        ActivityMainBinding.inflate(layoutInflater)
    }

    private val sceneView: SceneView by lazy {
        activityMainBinding.sceneView
    }

    private val dateTextView: TextView by lazy {
        activityMainBinding.dateTextView
    }

    private val seekBar: SeekBar by lazy {
        activityMainBinding.seekBar
    }

    private val spinner: Spinner by lazy {
        activityMainBinding.spinner
    }

    private val fab: FloatingActionButton by lazy {
        activityMainBinding.fab
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(activityMainBinding.root)

        // authentication with an API key or named user is required to access basemaps and other
        // location services
        ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY)

        // get the current calendar and set its time to midday
        val calendar = Calendar.getInstance()
        calendar.apply {
            // set the time zone to the US West Coast, where this data is based
            timeZone = TimeZone.getTimeZone("America/Los_Angeles")
            set(Calendar.HOUR_OF_DAY, 12)
            set(Calendar.MINUTE, 0)
        }

        val buildingsLayer =
            ArcGISSceneLayer("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/DevA_BuildingShells/SceneServer")

        // create a scene with a vector basemap, a world elevation source, and a layer showing planned
        // development in Portland, Oregon
        sceneView.scene = ArcGISScene(BasemapStyle.ARCGIS_TOPOGRAPHIC).apply {
            baseSurface =
                Surface(listOf(ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")))
            operationalLayers.add(buildingsLayer)
        }

        // initialize the scene with a realistic atmosphere and a set its time to the calendar
        sceneView.apply {
            setViewpointCamera(
                Camera(
                    45.54605,
                    -122.69033,
                    941.00021,
                    162.58544,
                    60.0,
                    0.0
                )
            )
            atmosphereEffect = AtmosphereEffect.REALISTIC
            sunTime = calendar
        }

        val dateFormat = SimpleDateFormat("HH:mm EEE, dd MMM yyyy", Locale.US).apply {
            timeZone = TimeZone.getTimeZone("America/Los_Angeles")
        }
        // display the full date and time in a text view
        dateTextView.text = dateFormat.format(calendar.time)

        // change the time of day with the seekbar
        seekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
            override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
                // slider progress represents minutes in the day (0-1439)
                val hours = floor((progress / 60.0)).toInt()
                val minutes = progress % 60
                calendar.apply {
                    set(Calendar.HOUR_OF_DAY, hours)
                    set(Calendar.MINUTE, minutes)
                }
                // display the full date and time in a text view()
                dateTextView.text = dateFormat.format(calendar.time)
                // set the sun time on the scene to the modified calendar
                sceneView.sunTime = calendar
            }

            override fun onStartTrackingTouch(seekBar: SeekBar?) {}
            override fun onStopTrackingTouch(seekBar: SeekBar?) {}
        })

        // create a spinner adapter to select lighting modes
        ArrayAdapter.createFromResource(
            this,
            R.array.lighting_modes,
            android.R.layout.simple_spinner_item
        ).also { adapter ->
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
            spinner.adapter = adapter
        }

        // change the lighting mode when a spinner item is selected
        spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener,
            AdapterView.OnItemClickListener {
            override fun onItemSelected(
                parent: AdapterView<*>,
                view: View?,
                position: Int,
                id: Long
            ) {
                val mode = parent.getItemAtPosition(position) as String
                sceneView.sunLighting = when (mode) {
                    "No light" -> LightingMode.NO_LIGHT
                    "Light only" -> LightingMode.LIGHT
                    "Light and shadows" -> LightingMode.LIGHT_AND_SHADOWS
                    else -> LightingMode.LIGHT_AND_SHADOWS
                }
            }

            override fun onNothingSelected(parent: AdapterView<*>?) {}
            override fun onItemClick(
                parent: AdapterView<*>?,
                view: View?,
                position: Int,
                id: Long
            ) {
            }
        }

        // select "light and shadows" option by default
        spinner.setSelection(2)

        sceneView.apply {
            // make sure the fab doesn't obscure the attribution bar
            addAttributionViewLayoutChangeListener { _, _, _, _, bottom, _, _, _, oldBottom ->
                val layoutParams = fab.layoutParams as CoordinatorLayout.LayoutParams
                layoutParams.bottomMargin += bottom - oldBottom
            }
            // close the options when the scene is tapped
            setOnTouchListener(object : DefaultSceneViewOnTouchListener(sceneView) {
                override fun onTouch(view: View?, motionEvent: MotionEvent?): Boolean {
                    if (view == sceneView) {
                        if (fab.isExpanded) {
                            fab.isExpanded = false
                        }
                    }
                    return super.onTouch(view, motionEvent)
                }
            })
        }
        // open and close the options with the fab
        fab.setOnClickListener { fab.isExpanded = !fab.isExpanded }
    }

    override fun onResume() {
        super.onResume()
        sceneView.resume()
    }

    override fun onPause() {
        sceneView.pause()
        super.onPause()
    }

    override fun onDestroy() {
        sceneView.dispose()
        super.onDestroy()
    }
}