Update AuthenticationScreen

app/build.gradle.kts

@@ -84,6 +84,7 @@ dependencies {
 
     // Compose
     implementation("androidx.compose.ui:ui:1.4.3")
+    implementation("androidx.compose.ui:ui-util:1.4.3")
     implementation("androidx.compose.ui:ui-graphics:1.4.3")
     implementation("androidx.compose.ui:ui-tooling-preview:1.4.3")
     implementation("androidx.compose.material:material:1.4.3")

app/src/main/java/com/pixelized/rplexicon/ui/screens/authentication/AuthenticationScreen.kt

@@ -2,12 +2,22 @@ package com.pixelized.rplexicon.ui.screens.authentication
 
 import android.content.res.Configuration.UI_MODE_NIGHT_NO
 import android.content.res.Configuration.UI_MODE_NIGHT_YES
+import androidx.compose.animation.core.Spring
+import androidx.compose.animation.core.animateFloatAsState
+import androidx.compose.animation.core.spring
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
 import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
@@ -18,9 +28,15 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.State
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.ColorFilter
+import androidx.compose.ui.graphics.ColorMatrix
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.buildAnnotatedString
@@ -28,16 +44,22 @@ import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.pixelized.rplexicon.LocalActivity
 import com.pixelized.rplexicon.R
 import com.pixelized.rplexicon.ui.navigation.LocalScreenNavHost
-import com.pixelized.rplexicon.ui.navigation.screens.navigateToLexicon
 import com.pixelized.rplexicon.ui.navigation.rootOption
+import com.pixelized.rplexicon.ui.navigation.screens.navigateToLexicon
 import com.pixelized.rplexicon.ui.theme.LexiconTheme
 import com.pixelized.rplexicon.ui.theme.colors.GoogleColorPalette
+import com.pixelized.rplexicon.utilitary.sensor.Gyroscope
 import kotlinx.coroutines.CoroutineScope
+import kotlin.math.E
+import kotlin.math.max
+import kotlin.math.min
+import kotlin.math.pow
 
 @Composable
 fun AuthenticationScreen(
@@ -85,6 +107,9 @@ private fun AuthenticationScreenContent(
     onGoogleSignIn: () -> Unit,
 ) {
     val typography = MaterialTheme.typography
+
+    PartyBackground()
+
     Column(
         modifier = modifier,
         verticalArrangement = Arrangement.spacedBy(16.dp, Alignment.Bottom),
@@ -111,6 +136,148 @@ private fun AuthenticationScreenContent(
     }
 }
 
+@Composable
+private fun PartyBackground(
+    modifier: Modifier = Modifier,
+    spacerWidth: Dp = 1.dp,
+    images: List<Int> = rememberPortrait(),
+) {
+    Gyroscope {
+        val balance = remember {
+            derivedStateOf {
+                max(-1f, min(1f, this.gyroscope.value.roll))
+            }
+        }
+        val colorFilter = remember {
+            ColorFilter.colorMatrix(
+                ColorMatrix().also { it.setToSaturation(0f) }
+            )
+        }
+        Row(modifier = modifier) {
+            Image(
+                modifier = Modifier
+                    .fillMaxHeight()
+                    .weight(weight = animatedWeight(progress = balance, divergence = 0.95f, position = 1f)),
+                contentScale = ContentScale.FillHeight,
+                colorFilter = colorFilter,
+                painter = painterResource(id = images[0]),
+                contentDescription = null,
+            )
+            Spacer(
+                modifier = Modifier
+                    .width(width = spacerWidth)
+                    .fillMaxHeight()
+                    .background(color = MaterialTheme.colorScheme.surface)
+            )
+            Image(
+                modifier = Modifier
+                    .fillMaxHeight()
+                    .weight(weight = animatedWeight(progress = balance, divergence = 0.93f, position = .5f)),
+                contentScale = ContentScale.FillHeight,
+                colorFilter = colorFilter,
+                painter = painterResource(id = images[1]),
+                contentDescription = null,
+            )
+            Spacer(
+                modifier = Modifier
+                    .width(width = spacerWidth)
+                    .fillMaxHeight()
+                    .background(color = MaterialTheme.colorScheme.surface)
+            )
+            Image(
+                modifier = Modifier
+                    .fillMaxHeight()
+                    .weight(weight = animatedWeight(progress = balance, divergence = 0.91f, position = 0f)),
+                contentScale = ContentScale.FillHeight,
+                colorFilter = colorFilter,
+                painter = painterResource(id = images[2]),
+                contentDescription = null,
+            )
+            Spacer(
+                modifier = Modifier
+                    .width(width = spacerWidth)
+                    .fillMaxHeight()
+                    .background(color = MaterialTheme.colorScheme.surface)
+            )
+            Image(
+                modifier = Modifier
+                    .fillMaxHeight()
+                    .weight(weight = animatedWeight(progress = balance, divergence = 0.93f, position = -.5f)),
+                contentScale = ContentScale.FillHeight,
+                colorFilter = colorFilter,
+                painter = painterResource(id = images[3]),
+                contentDescription = null,
+            )
+            Spacer(
+                modifier = Modifier
+                    .width(width = spacerWidth)
+                    .fillMaxHeight()
+                    .background(color = MaterialTheme.colorScheme.surface)
+            )
+            Image(
+                modifier = Modifier
+                    .fillMaxHeight()
+                    .weight(weight = animatedWeight(progress = balance, divergence = 0.95f, position = -1f)),
+                contentScale = ContentScale.FillHeight,
+                colorFilter = colorFilter,
+                painter = painterResource(id = images[4]),
+                contentDescription = null,
+            )
+        }
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .background(brush = rememberBackgroundGradient())
+        )
+    }
+}
+
+@Composable
+private fun rememberPortrait(): List<Int> = remember {
+    listOf(
+        R.drawable.im_tigrane,
+        R.drawable.im_unathana,
+        R.drawable.im_brulkhai,
+        R.drawable.im_nelia,
+        R.drawable.im_leandre,
+    )
+}
+
+@Composable
+private fun animatedWeight(
+    progress: State<Float>,
+    amplitude: Float = E.toFloat(),
+    divergence: Float = 0.95f,
+    position: Float,
+    step: Float = .16f,
+): Float {
+    val animatedWeight = animateFloatAsState(
+        targetValue = divergence * amplitude.pow(-(position - progress.value).pow(2f) / step) + (1f - divergence),
+        label = "AnimatedBackgroundWeight",
+        animationSpec = spring(
+            dampingRatio = Spring.DampingRatioNoBouncy,
+            stiffness = Spring.StiffnessLow,
+        )
+    )
+    return animatedWeight.value
+}
+
+@Composable
+private fun rememberBackgroundGradient(): Brush {
+    val colorScheme = MaterialTheme.colorScheme
+    return remember {
+        Brush.verticalGradient(
+            colors = listOf(
+                colorScheme.surface.copy(alpha = 0.25f),
+                colorScheme.surface.copy(alpha = 0.5f),
+                colorScheme.surface.copy(alpha = 0.75f),
+                colorScheme.surface.copy(alpha = 1.0f),
+                colorScheme.surface.copy(alpha = 1.0f),
+            )
+        )
+    }
+}
+
 @Composable
 private fun rememeberGoogleStringResource(): AnnotatedString {
     val default = LocalTextStyle.current.toSpanStyle()

app/src/main/java/com/pixelized/rplexicon/ui/screens/lexicon/LexiconScreen.kt

@@ -7,6 +7,10 @@ import android.content.res.Configuration.UI_MODE_NIGHT_YES
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.animation.AnimatedContent
+import androidx.compose.animation.ExperimentalAnimationApi
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.animation.with
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Box
@@ -118,8 +122,9 @@ fun LexiconScreen(
     }
 }
 
-@OptIn(ExperimentalMaterial3Api::class, ExperimentalMaterialApi::class,
-    ExperimentalFoundationApi::class
+@OptIn(
+    ExperimentalMaterial3Api::class, ExperimentalMaterialApi::class,
+    ExperimentalFoundationApi::class, ExperimentalAnimationApi::class
 )
 @Composable
 private fun LexiconScreenContent(
@@ -141,7 +146,7 @@ private fun LexiconScreenContent(
                 },
             )
         },
-        floatingActionButton = {
+//        floatingActionButton = {
 //            FloatingActionButton(
 //                modifier = Modifier.padding(start = 32.dp),
 //                expended = isFabExpended.value,
@@ -162,50 +167,63 @@ private fun LexiconScreenContent(
 //                    )
 //                },
 //            )
-        }
+//        }
     ) { padding ->
         Box(
             modifier = Modifier.padding(paddingValues = padding),
             contentAlignment = Alignment.TopCenter,
         ) {
-            LazyColumn(
-                modifier = Modifier
-                    .fillMaxSize()
-                    .pullRefresh(state = refreshState),
-                state = lazyColumnState,
-                contentPadding = PaddingValues(
-                    top = 8.dp,
-                    bottom = 8.dp + 16.dp // + 56.dp + 16.dp,
-                ),
-            ) {
-                if (items.value.isEmpty()) {
-                    items(
-                        count = 6,
-                        key = { it },
-                        contentType = { "Lexicon" },
+            AnimatedContent(
+                targetState = items.value.isEmpty(),
+                transitionSpec = { fadeIn() with fadeOut() },
+                label = "AnimatedLexicon"
+            ) { empty ->
+                when (empty) {
+                    true -> LazyColumn(
+                        modifier = Modifier
+                            .fillMaxSize()
+                            .pullRefresh(state = refreshState),
+                        state = lazyColumnState,
+                        contentPadding = PaddingValues(
+                            top = 8.dp,
+                            bottom = 8.dp + 16.dp // + 56.dp + 16.dp,
+                        ),
                     ) {
-                        LexiconItem(
-                            modifier = Modifier
-                                .animateItemPlacement()
-                                .fillMaxWidth()
-                                .padding(vertical = 8.dp, horizontal = 16.dp),
-                            item = LexiconItemUio.Brulkhai,
-                        )
+                        items(count = 6) {
+                            LexiconItem(
+                                modifier = Modifier
+                                    .animateItemPlacement()
+                                    .fillMaxWidth()
+                                    .padding(vertical = 8.dp, horizontal = 16.dp),
+                                item = LexiconItemUio.Brulkhai,
+                            )
+                        }
                     }
-                } else {
-                    items(
-                        items = items.value,
-                        key = { it.id },
-                        contentType = { "Lexicon" },
+
+                    else -> LazyColumn(
+                        modifier = Modifier
+                            .fillMaxSize()
+                            .pullRefresh(state = refreshState),
+                        state = lazyColumnState,
+                        contentPadding = PaddingValues(
+                            top = 8.dp,
+                            bottom = 8.dp + 16.dp // + 56.dp + 16.dp,
+                        ),
                     ) {
-                        LexiconItem(
-                            modifier = Modifier
-                                .animateItemPlacement()
-                                .clickable { onItem(it) }
-                                .fillMaxWidth()
-                                .padding(vertical = 8.dp, horizontal = 16.dp),
-                            item = it,
-                        )
+                        items(
+                            items = items.value,
+                            key = { it.id },
+                            contentType = { "Lexicon" },
+                        ) {
+                            LexiconItem(
+                                modifier = Modifier
+                                    .animateItemPlacement()
+                                    .clickable { onItem(it) }
+                                    .fillMaxWidth()
+                                    .padding(vertical = 8.dp, horizontal = 16.dp),
+                                item = it,
+                            )
+                        }
                     }
                 }
             }

app/src/main/java/com/pixelized/rplexicon/utilitary/sensor/Gyroscope.kt

@@ -0,0 +1,187 @@
+package com.pixelized.rplexicon.utilitary.sensor
+
+import android.content.Context
+import android.hardware.Sensor
+import android.hardware.SensorEvent
+import android.hardware.SensorEventListener
+import android.hardware.SensorManager
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.State
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalInspectionMode
+import kotlin.math.cos
+import kotlin.math.sin
+
+@Composable
+fun Gyroscope(
+    content: @Composable GyroscopeScope.() -> Unit,
+) {
+    val context = LocalContext.current
+
+    val gyroscope = remember {
+        mutableStateOf(GyroscopeData.Zero)
+    }
+
+    val scope = remember {
+        GyroscopeScopeImpl(
+            gyroscope = gyroscope,
+            initialAngle = GyroscopeScopeImpl.INITIAL_ANGLE_X,
+        )
+    }
+
+    if (LocalInspectionMode.current.not()) {
+        val onSensorChanged = remember {
+            object : SensorEventListener {
+                override fun onSensorChanged(event: SensorEvent?) {
+                    if (event?.sensor?.type == Sensor.TYPE_GRAVITY) {
+                        scope.gravity = event.values
+                    }
+                    if (event?.sensor?.type == Sensor.TYPE_MAGNETIC_FIELD) {
+                        scope.geomagnetic = event.values
+                    }
+                    val orientation = getGyroscopeData(
+                        gravity = scope.gravity,
+                        geomagnetic = scope.geomagnetic,
+                        deviceRotationMatrix = scope.deviceRotationMatrix,
+                        rotationMatrix = scope.localRotationMatrix,
+                        localRotationMatrix = scope.localOrientationMatrix,
+                        orientationMatrix = scope.orientationMatrix,
+                    )
+                    if (orientation != null) {
+                        gyroscope.value = orientation
+                    }
+                }
+
+                override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) = Unit
+            }
+        }
+
+        DisposableEffect(key1 = "SensorServices") {
+            val sensorManager = context.getSystemService(Context.SENSOR_SERVICE) as SensorManager
+            val gravitySensor = sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY)
+            val magnetometerSensor = sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD)
+
+            sensorManager.registerListener(
+                onSensorChanged,
+                gravitySensor,
+                SensorManager.SENSOR_DELAY_UI,
+            )
+            sensorManager.registerListener(
+                onSensorChanged,
+                magnetometerSensor,
+                SensorManager.SENSOR_DELAY_UI,
+            )
+
+            onDispose {
+                sensorManager.unregisterListener(onSensorChanged)
+            }
+        }
+    }
+
+    scope.content()
+}
+
+//////////////////////////////////////
+// region: GyroscopeScope
+
+@Immutable
+interface GyroscopeScope {
+    val gyroscope: State<GyroscopeData>
+}
+
+@Immutable
+class GyroscopeScopeImpl(
+    override val gyroscope: State<GyroscopeData>,
+    initialAngle: Float,
+) : GyroscopeScope {
+    var gravity: FloatArray? = null
+    var geomagnetic: FloatArray? = null
+    val deviceRotationMatrix: FloatArray = FloatArray(9)
+    val orientationMatrix: FloatArray = FloatArray(3)
+    val localRotationMatrix: FloatArray = getRotationMatrix(angle = initialAngle)
+    val localOrientationMatrix: FloatArray = FloatArray(9)
+
+    // https://fr.wikipedia.org/wiki/Matrice_de_rotation
+    private fun getRotationMatrix(angle: Float): FloatArray {
+        return floatArrayOf(1f, 0f, 0f, 0f, cos(angle), -sin(angle), 0f, sin(angle), cos(angle))
+    }
+
+    companion object {
+        const val INITIAL_ANGLE_X: Float = -Math.PI.toFloat() / 6f
+    }
+}
+
+// endregion
+//////////////////////////////////////
+// region: Helper method.
+
+/**
+ * Helper method to build a [GyroscopeData] instance containing the computation Pitch and Roll.
+ *
+ * @param gravity a FloatArray? of 3 elements representing the gravity acceleration.
+ * @param geomagnetic a FloatArray? of 3 elements representing the magnetosphere acceleration.
+ * @param deviceRotationMatrix a FloatArray of 9 elements representing the device rotation.
+ * @param rotationMatrix a FloatArray of 9 elements representing the wanted initial rotation.
+ * @param localRotationMatrix a FloatArray of 9 elements representing the device rotation with the initial angle set.
+ * @param orientationMatrix a FloatArray of 3 elements representing the Azimuth, Pitch and Roll.
+ */
+private fun getGyroscopeData(
+    gravity: FloatArray?,
+    geomagnetic: FloatArray?,
+    deviceRotationMatrix: FloatArray,
+    rotationMatrix: FloatArray,
+    localRotationMatrix: FloatArray,
+    orientationMatrix: FloatArray,
+): GyroscopeData? {
+    if (gravity != null && geomagnetic != null) {
+        // populate the rotation matrix.
+        if (SensorManager.getRotationMatrix(deviceRotationMatrix, null, gravity, geomagnetic)) {
+            // rotate the orientation matrix
+            rotate(
+                a = deviceRotationMatrix,
+                b = rotationMatrix,
+                out = localRotationMatrix,
+            )
+            // populate the orientation matrix.
+            SensorManager.getOrientation(localRotationMatrix, orientationMatrix)
+            // return the orientation.
+            return GyroscopeData(
+                pitch = orientationMatrix[1],
+                roll = orientationMatrix[2],
+            )
+        }
+    }
+    return null
+}
+
+/**
+ * This method is use to introduce an initial angle for the gyroscope by multiplying
+ * [a] by [b] and store the result into [out].
+ *
+ * @param a a FloatArray of length 9
+ * @param b a FloatArray of length 9
+ * @param out a FloatArray of length 9
+ */
+private fun rotate(
+    a: FloatArray,
+    b: FloatArray,
+    out: FloatArray,
+) {
+    if (a.size == 9 && b.size == 9 && out.size == 9) {
+        out[0] = a[0] * b[0] + a[1] * b[3] + a[2] * b[6]
+        out[1] = a[0] * b[1] + a[1] * b[4] + a[2] * b[7]
+        out[2] = a[0] * b[2] + a[1] * b[5] + a[2] * b[8]
+        out[3] = a[3] * b[0] + a[4] * b[3] + a[5] * b[6]
+        out[4] = a[3] * b[1] + a[4] * b[4] + a[5] * b[7]
+        out[5] = a[3] * b[2] + a[4] * b[5] + a[5] * b[8]
+        out[6] = a[6] * b[0] + a[7] * b[3] + a[8] * b[6]
+        out[7] = a[6] * b[1] + a[7] * b[4] + a[8] * b[7]
+        out[8] = a[6] * b[2] + a[7] * b[5] + a[8] * b[8]
+    }
+}
+
+// endregion

app/src/main/java/com/pixelized/rplexicon/utilitary/sensor/GyroscopeData.kt

@@ -0,0 +1,64 @@
+package com.pixelized.rplexicon.utilitary.sensor
+
+import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.Stable
+import androidx.compose.ui.util.packFloats
+import androidx.compose.ui.util.unpackFloat1
+import androidx.compose.ui.util.unpackFloat2
+
+@Stable
+fun GyroscopeData(pitch: Float, roll: Float): GyroscopeData =
+    GyroscopeData(packFloats(pitch, roll))
+
+@Immutable
+@JvmInline
+value class GyroscopeData internal constructor(@PublishedApi internal val packedValue: Long) {
+    @Stable
+    val pitch: Float
+        get() = unpackFloat1(packedValue)
+
+    @Stable
+    val roll: Float
+        get() = unpackFloat2(packedValue)
+
+    @Stable
+    operator fun component1(): Float = pitch
+
+    @Stable
+    operator fun component2(): Float = roll
+
+    @Suppress("unused")
+    fun copy(pitch: Float = this.pitch, roll: Float = this.roll): GyroscopeData =
+        GyroscopeData(pitch = pitch, roll = roll)
+
+    @Stable
+    operator fun minus(other: GyroscopeData): GyroscopeData =
+        GyroscopeData(pitch = pitch - other.pitch, roll = roll - other.roll)
+
+    @Stable
+    operator fun plus(other: GyroscopeData): GyroscopeData =
+        GyroscopeData(pitch = pitch + other.pitch, roll = roll + other.roll)
+
+    @Stable
+    operator fun unaryMinus(): GyroscopeData =
+        GyroscopeData(pitch = -pitch, roll = -roll)
+
+    @Stable
+    operator fun times(operand: Float): GyroscopeData =
+        GyroscopeData(pitch = pitch * operand, roll = roll * operand)
+
+    @Stable
+    operator fun div(operand: Float): GyroscopeData =
+        GyroscopeData(pitch = pitch / operand, roll = roll / operand)
+
+    @Stable
+    operator fun rem(operand: Int): GyroscopeData =
+        GyroscopeData(pitch = pitch % operand, roll = roll % operand)
+
+    @Stable
+    override fun toString(): String = "(pitch:$pitch, roll:$roll)"
+
+    companion object {
+        val Zero = GyroscopeData(0f, 0f)
+    }
+}