Remove scrollable animation workaround (#9690)

Reverts ba93060e591fccf3c85995b50f496bc937ae8ae4
Related https://android-review.googlesource.com/c/platform/frameworks/support/+/2239762

(cherry picked from commit 0759936226ca3fbc09be17d8bc779ffa1beb676d)

# Conflicts:
#	app/src/main/java/eu/kanade/presentation/browse/components/BrowseSourceList.kt
#	app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsMainScreen.kt

app/src/main/java/eu/kanade/presentation/browse/GlobalSearchScreen.kt

@@ -2,6 +2,7 @@ package eu.kanade.presentation.browse
 
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -19,7 +20,6 @@ import eu.kanade.tachiyomi.ui.browse.source.globalsearch.GlobalSearchState
 import eu.kanade.tachiyomi.ui.browse.source.globalsearch.SearchItemResult
 import eu.kanade.tachiyomi.util.system.LocaleHelper
 import tachiyomi.domain.manga.model.Manga
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Scaffold
 import tachiyomi.presentation.core.components.material.padding
 

app/src/main/java/eu/kanade/presentation/browse/MigrateSearchScreen.kt

@@ -1,6 +1,7 @@
 package eu.kanade.presentation.browse
 
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.State
 import eu.kanade.presentation.browse.components.GlobalSearchCardRow
@@ -14,7 +15,6 @@ import eu.kanade.tachiyomi.ui.browse.migration.search.MigrateSearchState
 import eu.kanade.tachiyomi.ui.browse.source.globalsearch.SearchItemResult
 import eu.kanade.tachiyomi.util.system.LocaleHelper
 import tachiyomi.domain.manga.model.Manga
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Scaffold
 
 @Composable

app/src/main/java/eu/kanade/presentation/browse/components/BrowseSourceEHentaiList.kt

@@ -11,6 +11,7 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.MaterialTheme
@@ -45,7 +46,6 @@ import tachiyomi.core.util.lang.withIOContext
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.presentation.core.components.Badge
 import tachiyomi.presentation.core.components.BadgeGroup
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.padding
 import java.util.Date
 

app/src/main/java/eu/kanade/presentation/browse/components/BrowseSourceList.kt

@@ -1,6 +1,7 @@
 package eu.kanade.presentation.browse.components
 
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
@@ -20,7 +21,6 @@ import kotlinx.coroutines.flow.StateFlow
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.domain.manga.model.MangaCover
 import tachiyomi.presentation.core.components.Badge
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.util.plus
 
 @Composable

app/src/main/java/eu/kanade/presentation/category/CategoryScreen.kt

@@ -3,6 +3,7 @@ package eu.kanade.presentation.category
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
@@ -16,7 +17,6 @@ import eu.kanade.presentation.components.AppBar
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.ui.category.CategoryScreenState
 import tachiyomi.domain.category.model.Category
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Scaffold
 import tachiyomi.presentation.core.components.material.padding
 import tachiyomi.presentation.core.components.material.topSmallPaddingValues

app/src/main/java/eu/kanade/presentation/category/components/biometric/BiometricTimesContent.kt

@@ -2,13 +2,13 @@ package eu.kanade.presentation.category.components.biometric
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import eu.kanade.tachiyomi.ui.category.biometric.TimeRangeItem
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.padding
 
 @Composable

app/src/main/java/eu/kanade/presentation/category/components/genre/SortTagContent.kt

@@ -2,12 +2,12 @@ package eu.kanade.presentation.category.components.genre
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.padding
 
 @Composable

app/src/main/java/eu/kanade/presentation/category/components/repo/SourceRepoContent.kt

@@ -2,12 +2,12 @@ package eu.kanade.presentation.category.components.repo
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.padding
 
 @Composable

app/src/main/java/eu/kanade/presentation/category/components/sources/SourceCategoryContent.kt

@@ -2,12 +2,12 @@ package eu.kanade.presentation.category.components.sources
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.padding
 
 @Composable

app/src/main/java/eu/kanade/presentation/manga/MangaScreen.kt

@@ -18,6 +18,7 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.only
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.systemBars
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListScope
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
@@ -93,7 +94,6 @@ import tachiyomi.domain.chapter.service.missingChaptersCount
 import tachiyomi.domain.library.service.LibraryPreferences
 import tachiyomi.domain.manga.model.Manga
 import tachiyomi.domain.source.model.StubSource
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.TwoPanelBox
 import tachiyomi.presentation.core.components.VerticalFastScroller
 import tachiyomi.presentation.core.components.material.ExtendedFloatingActionButton

app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsMainScreen.kt

@@ -4,6 +4,7 @@ import androidx.annotation.StringRes
 import androidx.compose.foundation.background
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -52,7 +53,6 @@ import eu.kanade.tachiyomi.R
 import exh.assets.EhAssets
 import exh.assets.ehassets.EhLogo
 import exh.assets.ehassets.MangadexLogo
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Scaffold
 import cafe.adriel.voyager.core.screen.Screen as VoyagerScreen
 

app/src/main/java/eu/kanade/presentation/more/settings/screen/WhatsNewDialog.kt

@@ -5,6 +5,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.MaterialTheme
@@ -29,7 +30,6 @@ import nl.adaptivity.xmlutil.serialization.XML
 import nl.adaptivity.xmlutil.serialization.XmlSerialName
 import nl.adaptivity.xmlutil.serialization.XmlValue
 import tachiyomi.core.util.lang.withIOContext
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Divider
 import tachiyomi.presentation.core.components.material.padding
 

app/src/main/java/eu/kanade/presentation/more/settings/screen/debug/WorkerInfoScreen.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
@@ -39,7 +40,6 @@ import eu.kanade.tachiyomi.util.system.workManager
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Scaffold
 import tachiyomi.presentation.core.util.plus
 

app/src/main/java/eu/kanade/presentation/more/settings/widget/TriStateListDialog.kt

@@ -7,6 +7,7 @@ import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.defaultMinSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.material.icons.Icons
@@ -28,7 +29,6 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import eu.kanade.tachiyomi.R
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Divider
 import tachiyomi.presentation.core.util.isScrolledToEnd
 import tachiyomi.presentation.core.util.isScrolledToStart

app/src/main/java/eu/kanade/presentation/more/stats/StatsScreenContent.kt

@@ -3,6 +3,7 @@ package eu.kanade.presentation.more.stats
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.CollectionsBookmark
@@ -19,7 +20,6 @@ import eu.kanade.presentation.more.stats.components.StatsSection
 import eu.kanade.presentation.more.stats.data.StatsData
 import eu.kanade.presentation.util.toDurationString
 import eu.kanade.tachiyomi.R
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.padding
 import java.util.Locale
 import kotlin.time.DurationUnit

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/SourceFilterDialog.kt

@@ -5,6 +5,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Save
@@ -29,7 +30,6 @@ import tachiyomi.domain.source.model.EXHSavedSearch
 import tachiyomi.presentation.core.components.CheckboxItem
 import tachiyomi.presentation.core.components.CollapsibleBox
 import tachiyomi.presentation.core.components.HeadingItem
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.SortItem
 import tachiyomi.presentation.core.components.TextItem
 import tachiyomi.presentation.core.components.material.Button

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -62,7 +62,6 @@ import eu.kanade.presentation.util.AssistContentScreen
 import eu.kanade.presentation.util.DefaultNavigatorScreenTransition
 import eu.kanade.presentation.util.collectAsState
 import eu.kanade.tachiyomi.BuildConfig
-import eu.kanade.tachiyomi.Migrations
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.cache.ChapterCache
 import eu.kanade.tachiyomi.data.download.DownloadCache

app/src/main/java/exh/ui/batchadd/BatchAddScreen.kt

@@ -7,6 +7,7 @@ import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.KeyboardOptions
@@ -32,7 +33,6 @@ import cafe.adriel.voyager.navigator.currentOrThrow
 import eu.kanade.presentation.components.AppBar
 import eu.kanade.presentation.util.Screen
 import eu.kanade.tachiyomi.R
-import tachiyomi.presentation.core.components.LazyColumn
 import tachiyomi.presentation.core.components.material.Button
 import tachiyomi.presentation.core.components.material.Scaffold
 import tachiyomi.presentation.core.components.material.padding

presentation-core/src/main/java/tachiyomi/presentation/core/components/LazyGrid.kt

@@ -1,6 +1,5 @@
 package tachiyomi.presentation.core.components
 
-import androidx.compose.foundation.gestures.FlingBehavior
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.lazy.grid.GridCells
@@ -14,7 +13,6 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
-import tachiyomi.presentation.core.util.flingBehaviorIgnoringMotionScale
 
 @Composable
 fun FastScrollLazyVerticalGrid(
@@ -31,7 +29,6 @@ fun FastScrollLazyVerticalGrid(
     verticalArrangement: Arrangement.Vertical =
         if (!reverseLayout) Arrangement.Top else Arrangement.Bottom,
     horizontalArrangement: Arrangement.Horizontal = Arrangement.Start,
-    flingBehavior: FlingBehavior = flingBehaviorIgnoringMotionScale(),
     userScrollEnabled: Boolean = true,
     content: LazyGridScope.() -> Unit,
 ) {
@@ -54,7 +51,6 @@ fun FastScrollLazyVerticalGrid(
             reverseLayout = reverseLayout,
             verticalArrangement = verticalArrangement,
             horizontalArrangement = horizontalArrangement,
-            flingBehavior = flingBehavior,
             userScrollEnabled = userScrollEnabled,
             content = content,
         )

presentation-core/src/main/java/tachiyomi/presentation/core/components/LazyList.kt

@@ -1,9 +1,9 @@
 package tachiyomi.presentation.core.components
 
-import androidx.compose.foundation.gestures.FlingBehavior
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.calculateEndPadding
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListScope
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.rememberLazyListState
@@ -15,38 +15,6 @@ import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.LocalLayoutDirection
 import androidx.compose.ui.unit.dp
 import tachiyomi.presentation.core.util.drawVerticalScrollbar
-import tachiyomi.presentation.core.util.flingBehaviorIgnoringMotionScale
-
-/**
- * LazyColumn with fling animation fix
- *
- * @see flingBehaviorIgnoringMotionScale
- */
-@Composable
-fun LazyColumn(
-    modifier: Modifier = Modifier,
-    state: LazyListState = rememberLazyListState(),
-    contentPadding: PaddingValues = PaddingValues(0.dp),
-    reverseLayout: Boolean = false,
-    verticalArrangement: Arrangement.Vertical =
-        if (!reverseLayout) Arrangement.Top else Arrangement.Bottom,
-    horizontalAlignment: Alignment.Horizontal = Alignment.Start,
-    flingBehavior: FlingBehavior = flingBehaviorIgnoringMotionScale(),
-    userScrollEnabled: Boolean = true,
-    content: LazyListScope.() -> Unit,
-) {
-    androidx.compose.foundation.lazy.LazyColumn(
-        modifier = modifier,
-        state = state,
-        contentPadding = contentPadding,
-        reverseLayout = reverseLayout,
-        verticalArrangement = verticalArrangement,
-        horizontalAlignment = horizontalAlignment,
-        flingBehavior = flingBehavior,
-        userScrollEnabled = userScrollEnabled,
-        content = content,
-    )
-}
 
 /**
  * LazyColumn with scrollbar.
@@ -60,7 +28,6 @@ fun ScrollbarLazyColumn(
     verticalArrangement: Arrangement.Vertical =
         if (!reverseLayout) Arrangement.Top else Arrangement.Bottom,
     horizontalAlignment: Alignment.Horizontal = Alignment.Start,
-    flingBehavior: FlingBehavior = flingBehaviorIgnoringMotionScale(),
     userScrollEnabled: Boolean = true,
     content: LazyListScope.() -> Unit,
 ) {
@@ -81,7 +48,6 @@ fun ScrollbarLazyColumn(
         reverseLayout = reverseLayout,
         verticalArrangement = verticalArrangement,
         horizontalAlignment = horizontalAlignment,
-        flingBehavior = flingBehavior,
         userScrollEnabled = userScrollEnabled,
         content = content,
     )
@@ -99,7 +65,6 @@ fun FastScrollLazyColumn(
     verticalArrangement: Arrangement.Vertical =
         if (!reverseLayout) Arrangement.Top else Arrangement.Bottom,
     horizontalAlignment: Alignment.Horizontal = Alignment.Start,
-    flingBehavior: FlingBehavior = flingBehaviorIgnoringMotionScale(),
     userScrollEnabled: Boolean = true,
     content: LazyListScope.() -> Unit,
 ) {
@@ -115,7 +80,6 @@ fun FastScrollLazyColumn(
             reverseLayout = reverseLayout,
             verticalArrangement = verticalArrangement,
             horizontalAlignment = horizontalAlignment,
-            flingBehavior = flingBehavior,
             userScrollEnabled = userScrollEnabled,
             content = content,
         )

presentation-core/src/main/java/tachiyomi/presentation/core/components/WheelPicker.kt

@@ -7,6 +7,7 @@ import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyItemScope
 import androidx.compose.foundation.lazy.LazyListItemInfo
 import androidx.compose.foundation.lazy.LazyListState

presentation-core/src/main/java/tachiyomi/presentation/core/util/Scrollable.kt

@@ -1,60 +0,0 @@
-package tachiyomi.presentation.core.util
-
-import androidx.compose.animation.core.AnimationState
-import androidx.compose.animation.core.DecayAnimationSpec
-import androidx.compose.animation.core.animateDecay
-import androidx.compose.animation.rememberSplineBasedDecay
-import androidx.compose.foundation.gestures.FlingBehavior
-import androidx.compose.foundation.gestures.ScrollScope
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.remember
-import androidx.compose.ui.MotionDurationScale
-import kotlinx.coroutines.withContext
-import kotlin.math.abs
-
-/**
- * FlingBehavior that always uses the default motion scale.
- *
- * This makes the scrolling animation works like View's lists
- * when "Remove animation" settings is on.
- */
-@Composable
-fun flingBehaviorIgnoringMotionScale(): FlingBehavior {
-    val flingSpec = rememberSplineBasedDecay<Float>()
-    return remember(flingSpec) {
-        DefaultFlingBehavior(flingSpec)
-    }
-}
-
-private val DefaultMotionDurationScale = object : MotionDurationScale {
-    // Use default motion scale factor
-    override val scaleFactor: Float = 1f
-}
-
-private class DefaultFlingBehavior(
-    private val flingDecay: DecayAnimationSpec<Float>,
-) : FlingBehavior {
-    override suspend fun ScrollScope.performFling(initialVelocity: Float): Float {
-        // come up with the better threshold, but we need it since spline curve gives us NaNs
-        return if (abs(initialVelocity) > 1f) {
-            var velocityLeft = initialVelocity
-            var lastValue = 0f
-            withContext(DefaultMotionDurationScale) {
-                AnimationState(
-                    initialValue = 0f,
-                    initialVelocity = initialVelocity,
-                ).animateDecay(flingDecay) {
-                    val delta = value - lastValue
-                    val consumed = scrollBy(delta)
-                    lastValue = value
-                    velocityLeft = this.velocity
-                    // avoid rounding errors and stop if anything is unconsumed
-                    if (abs(delta - consumed) > 0.5f) this.cancelAnimation()
-                }
-            }
-            velocityLeft
-        } else {
-            initialVelocity
-        }
-    }
-}