maobo/cup_edit
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

gesture handler improvements

Browse Source
This commit is contained in:
Nick Fisher
2024-09-13 14:25:10 +08:00
parent 04b9d9e400
commit d73b437104
1 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
thermion_flutter/thermion_flutter/lib/thermion/widgets/camera/gestures/v2/default_zoom_camera_delegate.dart
View File

@@ -7,11 +7,11 @@ import 'package:vector_math/vector_math_64.dart';
class DefaultZoomCameraDelegate implements ZoomCameraDelegate { class DefaultZoomCameraDelegate implements ZoomCameraDelegate {
final ThermionViewer viewer; final ThermionViewer viewer;
final double _zoomSensitivity = 0.0005; final double zoomSensitivity ;
final double? Function(Vector3 cameraPosition)? getDistanceToTarget; final double? Function(Vector3 cameraPosition)? getDistanceToTarget;
DefaultZoomCameraDelegate(this.viewer, {this.getDistanceToTarget}); DefaultZoomCameraDelegate(this.viewer, {this.zoomSensitivity = 0.005, this.getDistanceToTarget});
@override @override
Future<void> zoomCamera(double scrollDelta, Vector2? velocity) async { Future<void> zoomCamera(double scrollDelta, Vector2? velocity) async {
@@ -23,14 +23,14 @@ class DefaultZoomCameraDelegate implements ZoomCameraDelegate {
forwardVector.normalize(); forwardVector.normalize();
double? distanceToTarget = getDistanceToTarget?.call(cameraPosition); double? distanceToTarget = getDistanceToTarget?.call(cameraPosition);
double zoomDistance = scrollDelta * _zoomSensitivity; double zoomDistance = scrollDelta * zoomSensitivity;
if (distanceToTarget != null) { if (distanceToTarget != null) {
zoomDistance *= distanceToTarget; zoomDistance *= distanceToTarget;
if (zoomDistance.abs() < 0.0001) { if (zoomDistance.abs() < 0.0001) {
zoomDistance = scrollDelta * _zoomSensitivity; zoomDistance = scrollDelta * zoomSensitivity;
} }
} }
zoomDistance = max(zoomDistance, scrollDelta * _zoomSensitivity); zoomDistance = max(zoomDistance, scrollDelta * zoomSensitivity);
Vector3 newPosition = cameraPosition + (forwardVector * zoomDistance); Vector3 newPosition = cameraPosition + (forwardVector * zoomDistance);
await viewer.setCameraPosition(newPosition.x, newPosition.y, newPosition.z); await viewer.setCameraPosition(newPosition.x, newPosition.y, newPosition.z);