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feat: more rotation gizmo improvements

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This commit is contained in:
Nick Fisher
2024-12-12 22:00:41 +08:00
parent 62cd85c148
commit 7cf1468f38
9 changed files with 7697 additions and 7948 deletions
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119
thermion_dart/lib/src/input/src/implementations/gizmo_input_handler.dart
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@@ -8,9 +8,15 @@ class _Gizmo {
final ThermionViewer viewer;
final GizmoAsset _gizmo;
ThermionEntity? _attachedTo;
final GizmoType type;
_Gizmo(this._gizmo, this.viewer, this.type);
final GizmoType _gizmoType;
_Gizmo(this._gizmo, this.viewer, this._gizmoType);
static Future<_Gizmo> forType(ThermionViewer viewer, GizmoType type) async {
final view = await viewer.getViewAt(0);
return _Gizmo(await viewer.createGizmo(view, type), viewer, type);
}
final _onEntityTransformUpdated = StreamController<
({ThermionEntity entity, Matrix4 transform})>.broadcast();
@@ -18,19 +24,18 @@ class _Gizmo {
Axis? _active;
Axis? get active => _active;
double _getAngleBetweenVectors(Vector2 v1, Vector2 v2) {
// Normalize vectors to ensure consistent rotation regardless of distance from center
v1.normalize();
v2.normalize();
// Calculate angle using atan2
double angle = atan2(v2.y, v2.x) - atan2(v1.y, v1.x);
// Ensure angle is between -π and π
if (angle > pi) angle -= 2 * pi;
if (angle < -pi) angle += 2 * pi;
return angle;
}
@@ -87,9 +92,9 @@ class _Gizmo {
return;
}
if (type == GizmoType.translation) {
if (_gizmoType == GizmoType.translation) {
await _updateTranslation(currentPosition, delta);
} else if (type == GizmoType.rotation) {
} else if (_gizmoType == GizmoType.rotation) {
await _updateRotation(currentPosition, delta);
}
@@ -97,7 +102,8 @@ class _Gizmo {
.add((entity: _attachedTo!, transform: gizmoTransform!));
}
Future<void> _updateTranslation(Vector2 currentPosition, Vector2 delta) async {
Future<void> _updateTranslation(
Vector2 currentPosition, Vector2 delta) async {
var view = await viewer.getViewAt(0);
var camera = await viewer.getActiveCamera();
var viewport = await view.getViewport();
@@ -115,17 +121,13 @@ class _Gizmo {
var gizmoNdc = gizmoClipSpace / gizmoClipSpace.w;
var gizmoScreenSpace = Vector2(
((gizmoNdc.x / 2) + 0.5) * viewport.width,
var gizmoScreenSpace = Vector2(((gizmoNdc.x / 2) + 0.5) * viewport.width,
viewport.height - (((gizmoNdc.y / 2) + 0.5) * viewport.height));
gizmoScreenSpace += delta;
gizmoNdc = Vector4(
((gizmoScreenSpace.x / viewport.width) - 0.5) * 2,
(((gizmoScreenSpace.y / viewport.height)) - 0.5) * -2,
gizmoNdc.z,
1.0);
gizmoNdc = Vector4(((gizmoScreenSpace.x / viewport.width) - 0.5) * 2,
(((gizmoScreenSpace.y / viewport.height)) - 0.5) * -2, gizmoNdc.z, 1.0);
var gizmoViewSpace = inverseProjectionMatrix * gizmoNdc;
gizmoViewSpace /= gizmoViewSpace.w;
@@ -142,7 +144,6 @@ class _Gizmo {
}
Future<void> _updateRotation(Vector2 currentPosition, Vector2 delta) async {
var view = await viewer.getViewAt(0);
var camera = await viewer.getActiveCamera();
var viewport = await view.getViewport();
@@ -157,8 +158,7 @@ class _Gizmo {
gizmoPositionWorldSpace.z, 1.0);
var gizmoNdc = gizmoClipSpace / gizmoClipSpace.w;
var gizmoScreenSpace = Vector2(
((gizmoNdc.x / 2) + 0.5) * viewport.width,
var gizmoScreenSpace = Vector2(((gizmoNdc.x / 2) + 0.5) * viewport.width,
viewport.height - (((gizmoNdc.y / 2) + 0.5) * viewport.height));
// Calculate vectors from gizmo center to previous and current mouse positions
@@ -207,23 +207,48 @@ class _Gizmo {
// Apply rotation to the current transform
gizmoTransform = rotationMatrix * gizmoTransform!;
await viewer.setTransform(_attachedTo!, gizmoTransform!);
}
}
class GizmoInputHandler extends InputHandler {
final InputHandler wrapped;
final ThermionViewer viewer;
late final _Gizmo translationGizmo;
late final _Gizmo rotationGizmo;
_Gizmo get active =>
type == GizmoType.translation ? translationGizmo : rotationGizmo;
GizmoType type = GizmoType.translation;
late final _gizmos = <GizmoType, _Gizmo>{};
_Gizmo? active;
StreamSubscription? _entityTransformUpdatedListener;
GizmoType? getGizmoType() {
return active?._gizmoType;
}
Future setGizmoType(GizmoType? type) async {
if (type == null) {
await active?.detach();
active = null;
return;
}
var target = _gizmos[type]!;
if (target != active) {
await _entityTransformUpdatedListener?.cancel();
if (active?._attachedTo != null) {
var attachedTo = active!._attachedTo!;
await active!.detach();
await target.attach(attachedTo);
}
active = target;
_entityTransformUpdatedListener =
active!._onEntityTransformUpdated.stream.listen((event) {
_transformUpdatedController.add(event);
});
}
}
final _transformUpdatedController =
StreamController<({ThermionEntity entity, Matrix4 transform})>();
Stream<({ThermionEntity entity, Matrix4 transform})>
get onEntityTransformUpdated =>
translationGizmo._onEntityTransformUpdated.stream;
get onEntityTransformUpdated => _transformUpdatedController.stream;
GizmoInputHandler({required this.wrapped, required this.viewer}) {
initialize();
@@ -236,13 +261,12 @@ class GizmoInputHandler extends InputHandler {
throw Exception("Already initialized");
}
await viewer.initialized;
final view = await viewer.getViewAt(0);
var tg = await viewer.createGizmo(view, GizmoType.translation);
this.translationGizmo = _Gizmo(tg, viewer, GizmoType.translation);
var rg = await viewer.createGizmo(view, GizmoType.rotation);
this.rotationGizmo = _Gizmo(rg, viewer, GizmoType.rotation);
_gizmos[GizmoType.translation] =
await _Gizmo.forType(viewer, GizmoType.translation);
_gizmos[GizmoType.rotation] =
await _Gizmo.forType(viewer, GizmoType.rotation);
await setGizmoType(GizmoType.translation);
_initialized.complete(true);
}
@@ -251,8 +275,8 @@ class GizmoInputHandler extends InputHandler {
@override
Future dispose() async {
await viewer.removeEntity(rotationGizmo._gizmo);
await viewer.removeEntity(translationGizmo._gizmo);
await viewer.removeEntity(_gizmos[GizmoType.rotation]!._gizmo);
await viewer.removeEntity(_gizmos[GizmoType.translation]!._gizmo);
}
@override
@@ -288,13 +312,13 @@ class GizmoInputHandler extends InputHandler {
await viewer.pick(localPosition.x.toInt(), localPosition.y.toInt(),
(result) async {
if (active._gizmo.isNonPickable(result.entity) ||
if (active?._gizmo.isNonPickable(result.entity) == true ||
result.entity == FILAMENT_ENTITY_NULL) {
await active.detach();
await active!.detach();
return;
}
if (!active._gizmo.isGizmoEntity(result.entity)) {
active.attach(result.entity);
if (active?._gizmo.isGizmoEntity(result.entity) != true) {
active!.attach(result.entity);
}
});
}
@@ -304,19 +328,18 @@ class GizmoInputHandler extends InputHandler {
if (!_initialized.isCompleted) {
return;
}
active.checkHover(
localPosition.x.floor(), localPosition.y.floor());
active?.checkHover(localPosition.x.floor(), localPosition.y.floor());
}
@override
Future<void> onPointerMove(
Vector2 localPosition, Vector2 delta, bool isMiddle) async {
if (!isMiddle && active._active != null) {
if (!isMiddle && active?._active != null) {
final scaledDelta = Vector2(
delta.x,
delta.y,
);
active._updateTransform(localPosition, scaledDelta);
active!._updateTransform(localPosition, scaledDelta);
return;
}
return wrapped.onPointerMove(localPosition, delta, isMiddle);
@@ -364,14 +387,14 @@ class GizmoInputHandler extends InputHandler {
}
Future detach(ThermionAsset asset) async {
if (active._attachedTo == asset.entity) {
await active.detach();
if (active?._attachedTo == asset.entity) {
await active!.detach();
return;
}
final childEntities = await asset.getChildEntities();
for (final childEntity in childEntities) {
if (active._attachedTo == childEntity) {
await active.detach();
if (active?._attachedTo == childEntity) {
await active!.detach();
return;
}
}