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Try to prevent 3D zoom corner cases

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David Koňařík 2025-03-03 10:11:08 +01:00 committed by Martin Dobias
parent c6fd8cd2a7
commit f2128d499a
1 changed files with 4 additions and 0 deletions
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src/3d/qgscameracontroller.cpp
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@ -543,7 +543,11 @@ void QgsCameraController::handleTerrainNavigationWheelZoom()
double oldDist = ( mZoomPoint - mCameraBefore->position() ).length();
// Each step of the scroll wheel decreases distance by 20%
double newDist = std::pow( 0.8, mCumulatedWheelY ) * oldDist;
// Make sure we don't clip the thing we're zooming to.
newDist = std::max( newDist, 2.0 );
double zoomFactor = newDist / oldDist;
// Don't change the distance too suddenly to hopefully prevent numerical instability
zoomFactor = std::clamp( zoomFactor, 0.01, 100.0 );
zoomCameraAroundPivot( mCameraBefore->position(), zoomFactor, mZoomPoint );