WorldWind Kotlin/earth.worldwind/[ios]BasicWorldWindowController

BasicWorldWindowController

open class BasicWorldWindowController(wwd: WorldWindow) : AbstractWorldWindowController, WorldWindowController, GestureListener

iOS port of the gesture-driven camera controller. Mirrors the Android shape — own a set of recognizers, dispatch TouchEvents, translate gestureStateChanged into camera updates.

Constructors

constructor(wwd: WorldWindow)

Properties

fling

val fling: FlingAnimator

Inertial pan animator. Each platform's createFlingScheduler supplies the per-frame clock. The per-frame action dispatches by projection: 2D uses incremental projected-meters math, 3D uses great-circle radians. Picking the right one matters because Mercator metersPerPixel diverges from the 3D radians-on-a-sphere formula away from the equator.

pivotAnchor

val pivotAnchor: PivotAnchorState

Shared anchor for pinch / rotate / wheel handlers. Lazy because engine may not be initialized yet at controller-construction time.

velocitySampler

val velocitySampler: ReleaseVelocitySampler

Trailing-window velocity tracker used to seed fling on gesture release.

Functions

cancelFling

open override fun cancelFling()

Cancels any in-progress inertial pan ("fling"). The host calls this on every touch start before routing the event downstream.

gestureStateChanged

open override fun gestureStateChanged(event: TouchEvent, recognizer: GestureRecognizer)

handleIndirectPinch

fun handleIndirectPinch(state: GestureState, scale: Float, screenX: Float, screenY: Float)

Programmatic pinch entry for Mac trackpad's native UIPinchGestureRecognizer - UITouch-based PinchRecognizer doesn't see indirect (trackpad) pinches.

handleIndirectRotate

fun handleIndirectRotate(state: GestureState, rotationRadians: Float, screenX: Float, screenY: Float)

Programmatic rotation entry for Mac trackpad's UIRotationGestureRecognizer - UITouch-based RotationRecognizer doesn't see indirect (trackpad) rotations.

handleIndirectTilt

fun handleIndirectTilt(state: GestureState, translationY: Float)

Programmatic tilt entry for Mac trackpad two-finger pan.

onTouchEvent

open override fun onTouchEvent(event: TouchEvent): Boolean

release

open override fun release()

Releases any platform resources held by the controller (timers, frame callbacks). Subclasses should override and call super.release() to add their own cleanup (e.g. VC repeat timers).