Expire landing flags after an hour. (b970b8d0) · Commits · e / os / android_frameworks_base

packages/EasterEgg/src/com/android/egg/landroid/Physics.kt

+14 −1

Original line number	Original line	Diff line number	Diff line
	@@ -20,7 +20,7 @@ import android.util.ArraySet
	import kotlin.random.Random		import kotlin.random.Random

	// artificially speed up or slow down the simulation		// artificially speed up or slow down the simulation
	const val TIME_SCALE = 1f		const val TIME_SCALE = 1f // simulation seconds per wall clock second

	// if it's been over 1 real second since our last timestep, don't simulate that elapsed time.		// if it's been over 1 real second since our last timestep, don't simulate that elapsed time.
	// this allows the simulation to "pause" when, for example, the activity pauses		// this allows the simulation to "pause" when, for example, the activity pauses
	@@ -36,6 +36,19 @@ interface Entity {
	fun postUpdate(sim: Simulator, dt: Float)		fun postUpdate(sim: Simulator, dt: Float)
	}		}

			interface Removable {
			fun canBeRemoved(): Boolean
			}

			class Fuse(var lifetime: Float) : Removable {
			fun update(dt: Float) {
			lifetime -= dt
			}
			override fun canBeRemoved(): Boolean {
			return lifetime < 0
			}
			}

	open class Body(var name: String = "Unknown") : Entity {		open class Body(var name: String = "Unknown") : Entity {
	var pos = Vec2.Zero		var pos = Vec2.Zero
	var opos = Vec2.Zero		var opos = Vec2.Zero

packages/EasterEgg/src/com/android/egg/landroid/Universe.kt

+25 −18

Original line number	Original line	Diff line number	Diff line
	@@ -43,11 +43,9 @@ const val CRAFT_SPEED_LIMIT = 5_000f
	const val MAIN_ENGINE_ACCEL = 1000f // thrust effect, pixels per second squared		const val MAIN_ENGINE_ACCEL = 1000f // thrust effect, pixels per second squared
	const val LAUNCH_MECO = 2f // how long to suspend gravity when launching		const val LAUNCH_MECO = 2f // how long to suspend gravity when launching

	const val SCALED_THRUST = true		const val LANDING_REMOVAL_TIME = 3600f // one hour of simulation time

	interface Removable {		const val SCALED_THRUST = true
	fun canBeRemoved(): Boolean
	}

	open class Planet(		open class Planet(
	val orbitCenter: Vec2,		val orbitCenter: Vec2,
	@@ -321,7 +319,7 @@ open class Universe(val namer: Namer, randomSeed: Long) : Simulator(randomSeed)
	//		//
	(1..10).forEach {		(1..10).forEach {
	Spark(		Spark(
	lifetime = rng.nextFloatInRange(0.5f, 2f),		ttl = rng.nextFloatInRange(0.5f, 2f),
	style = Spark.Style.DOT,		style = Spark.Style.DOT,
	color = Color.White,		color = Color.White,
	size = 1f		size = 1f
	@@ -359,13 +357,22 @@ open class Universe(val namer: Namer, randomSeed: Long) : Simulator(randomSeed)
	entities		entities
	.filterIsInstance<Removable>()		.filterIsInstance<Removable>()
	.filter(predicate = Removable::canBeRemoved)		.filter(predicate = Removable::canBeRemoved)
	.filterIsInstance<Entity>()		.forEach { remove(it as Entity) }
	.forEach { remove(it) }
			constraints
			.filterIsInstance<Removable>()
			.filter(predicate = Removable::canBeRemoved)
			.forEach { remove(it as Constraint) }
	}		}
	}		}

	class Landing(var ship: Spacecraft?, val planet: Planet, val angle: Float, val text: String = "") :		class Landing(
	Constraint {		var ship: Spacecraft?,
			val planet: Planet,
			val angle: Float,
			val text: String = "",
			private val fuse: Fuse = Fuse(LANDING_REMOVAL_TIME)
			) : Constraint, Removable by fuse {
	override fun solve(sim: Simulator, dt: Float) {		override fun solve(sim: Simulator, dt: Float) {
	ship?.let { ship ->		ship?.let { ship ->
	val landingVector = Vec2.makeWithAngleMag(angle, ship.radius + planet.radius)		val landingVector = Vec2.makeWithAngleMag(angle, ship.radius + planet.radius)
	@@ -373,17 +380,20 @@ class Landing(var ship: Spacecraft?, val planet: Planet, val angle: Float, val t
	ship.pos = (ship.pos * 0.5f) + (desiredPos * 0.5f) // @@@ FIXME		ship.pos = (ship.pos * 0.5f) + (desiredPos * 0.5f) // @@@ FIXME
	ship.angle = angle		ship.angle = angle
	}		}

			fuse.update(dt)
	}		}
	}		}

	class Spark(		class Spark(
	var lifetime: Float,		var ttl: Float,
	collides: Boolean = false,		collides: Boolean = false,
	mass: Float = 0f,		mass: Float = 0f,
	val style: Style = Style.LINE,		val style: Style = Style.LINE,
	val color: Color = Color.Gray,		val color: Color = Color.Gray,
	val size: Float = 2f		val size: Float = 2f,
	) : Removable, Body() {		val fuse: Fuse = Fuse(ttl)
			) : Removable by fuse, Body(name = "Spark") {
	enum class Style {		enum class Style {
	LINE,		LINE,
	LINE_ABSOLUTE,		LINE_ABSOLUTE,
	@@ -398,10 +408,7 @@ class Spark(
	}		}
	override fun update(sim: Simulator, dt: Float) {		override fun update(sim: Simulator, dt: Float) {
	super.update(sim, dt)		super.update(sim, dt)
	lifetime -= dt		fuse.update(dt)
	}
	override fun canBeRemoved(): Boolean {
	return lifetime < 0
	}		}
	}		}

	@@ -486,11 +493,11 @@ class Spacecraft : Body() {
	// exhaust		// exhaust
	sim.add(		sim.add(
	Spark(		Spark(
	lifetime = sim.rng.nextFloatInRange(0.5f, 1f),		ttl = sim.rng.nextFloatInRange(0.5f, 1f),
	collides = true,		collides = true,
	mass = 1f,		mass = 1f,
	style = Spark.Style.RING,		style = Spark.Style.RING,
	size = 3f,		size = 1f,
	color = Color(0x40FFFFFF)		color = Color(0x40FFFFFF)
	)		)
	.also { spark ->		.also { spark ->

packages/EasterEgg/src/com/android/egg/landroid/VisibleUniverse.kt

+10 −2

Original line number	Original line	Diff line number	Diff line
	@@ -30,6 +30,7 @@ import androidx.compose.ui.util.lerp
	import androidx.core.math.MathUtils.clamp		import androidx.core.math.MathUtils.clamp
	import com.android.egg.flags.Flags.flagFlag		import com.android.egg.flags.Flags.flagFlag
	import java.lang.Float.max		import java.lang.Float.max
			import kotlin.math.exp
	import kotlin.math.sqrt		import kotlin.math.sqrt

	const val DRAW_ORBITS = true		const val DRAW_ORBITS = true
	@@ -289,7 +290,8 @@ fun ZoomedDrawScope.drawLanding(landing: Landing) {

	fun ZoomedDrawScope.drawSpark(spark: Spark) {		fun ZoomedDrawScope.drawSpark(spark: Spark) {
	with(spark) {		with(spark) {
	if (lifetime < 0) return		if (fuse.lifetime < 0) return
			val life = 1f - fuse.lifetime / ttl
	when (style) {		when (style) {
	Spark.Style.LINE ->		Spark.Style.LINE ->
	if (opos != Vec2.Zero) drawLine(color, opos, pos, strokeWidth = size)		if (opos != Vec2.Zero) drawLine(color, opos, pos, strokeWidth = size)
	@@ -297,7 +299,13 @@ fun ZoomedDrawScope.drawSpark(spark: Spark) {
	if (opos != Vec2.Zero) drawLine(color, opos, pos, strokeWidth = size / zoom)		if (opos != Vec2.Zero) drawLine(color, opos, pos, strokeWidth = size / zoom)
	Spark.Style.DOT -> drawCircle(color, size, pos)		Spark.Style.DOT -> drawCircle(color, size, pos)
	Spark.Style.DOT_ABSOLUTE -> drawCircle(color, size, pos / zoom)		Spark.Style.DOT_ABSOLUTE -> drawCircle(color, size, pos / zoom)
	Spark.Style.RING -> drawCircle(color, size, pos, style = Stroke(width = 1f / zoom))		Spark.Style.RING ->
			drawCircle(
			color = color.copy(alpha = color.alpha * (1f - life)),
			radius = exp(lerp(size, 3f * size, life)) - 1f,
			center = pos,
			style = Stroke(width = 1f / zoom)
			)
	}		}
	}		}
	}		}