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feat: free flight camera improvements

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This commit is contained in:
Nick Fisher
2024-11-19 16:30:35 +08:00
parent 9d3f87218e
commit 1ce5bd3bcf
1 changed files with 16 additions and 44 deletions
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60
thermion_dart/lib/src/input/src/implementations/free_flight_camera_delegate.dart
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@@ -15,10 +15,6 @@ class FreeFlightInputHandlerDelegate implements InputHandlerDelegate {
final double panSensitivity;
final double? clampY;
static final _up = Vector3(0, 1, 0);
static final _forward = Vector3(0, 0, -1);
static final Vector3 _right = Vector3(1, 0, 0);
Vector2 _queuedRotationDelta = Vector2.zero();
Vector3 _queuedTranslateDelta = Vector3.zero();
double _queuedZoomDelta = 0.0;
@@ -82,54 +78,42 @@ class FreeFlightInputHandlerDelegate implements InputHandlerDelegate {
final activeCamera = await viewer.getActiveCamera();
Matrix4 currentTransform = await viewer.getLocalTransform(await entity);
Matrix4 current = await viewer.getLocalTransform(await entity);
Quaternion currentRotation =
Quaternion.fromRotation(currentTransform.getRotation());
// Calculate relative transform
Matrix4 relativeTransform = Matrix4.identity();
Vector3 relativeTranslation = Vector3.zero();
Quaternion relativeRotation = Quaternion.identity();
// Apply rotation
if (_queuedRotationDelta.length2 > 0.0) {
double deltaX = _queuedRotationDelta.x * rotationSensitivity;
double deltaY = _queuedRotationDelta.y * rotationSensitivity;
Quaternion yawRotation = Quaternion.axisAngle(_up, -deltaX);
Quaternion pitchRotation = Quaternion.axisAngle(_right, -deltaY);
relativeRotation = pitchRotation * yawRotation;
relativeRotation = Quaternion.axisAngle(current.up, -deltaX) * Quaternion.axisAngle(current.right, -deltaY);
_queuedRotationDelta = Vector2.zero();
}
// Apply pan
// Apply (mouse) pan
if (_queuedTranslateDelta.length2 > 0.0) {
double deltaX = _queuedTranslateDelta.x * panSensitivity;
double deltaY = _queuedTranslateDelta.y * panSensitivity;
double deltaZ = -_queuedTranslateDelta.z * panSensitivity;
relativeTranslation += _right * deltaX + _up * deltaY + _forward * deltaZ;
relativeTranslation += current.right * deltaX +
current.up * deltaY +
current.forward * deltaZ;
_queuedTranslateDelta = Vector3.zero();
}
// Apply zoom
if (_queuedZoomDelta != 0.0) {
Vector3 forward = _forward.clone()..applyQuaternion(currentRotation);
relativeTranslation += forward * -_queuedZoomDelta * zoomSensitivity;
relativeTranslation += current.forward
..scaled(_queuedZoomDelta * zoomSensitivity);
_queuedZoomDelta = 0.0;
}
// Apply queued movement
if (_queuedMoveDelta.length2 > 0.0) {
Vector3 forward = _forward.clone()..applyQuaternion(currentRotation);
Vector3 right = _right.clone()..applyQuaternion(currentRotation);
Vector3 up = _up.clone()..applyQuaternion(currentRotation);
relativeTranslation += (right * _queuedMoveDelta.x +
up * _queuedMoveDelta.y +
forward * _queuedMoveDelta.z) *
relativeTranslation += (current.right * _queuedMoveDelta.x +
current.up * _queuedMoveDelta.y +
current.forward * _queuedMoveDelta.z) *
movementSensitivity;
_queuedMoveDelta = Vector3.zero();
@@ -142,23 +126,11 @@ class FreeFlightInputHandlerDelegate implements InputHandlerDelegate {
relativeTranslation = modelMatrix.getRotation() * relativeTranslation;
}
// Compose relative transform
relativeTransform = Matrix4.compose(
relativeTranslation, relativeRotation, Vector3(1, 1, 1));
// Apply relative transform to current transform
Matrix4 newTransform = currentTransform * relativeTransform;
// Extract new position and constrain it
Vector3 newPosition = newTransform.getTranslation();
newPosition = _constrainPosition(newPosition);
// Recompose final transform with constrained position
Matrix4 finalTransform = Matrix4.compose(newPosition,
Quaternion.fromRotation(newTransform.getRotation()), Vector3(1, 1, 1));
// Update camera
await viewer.setTransform(await entity, finalTransform);
await viewer.setTransform(
await entity,
Matrix4.compose(
relativeTranslation, relativeRotation, Vector3(1, 1, 1)) * current );
_executing = false;
}