diff --git a/Sources/Filters/Sources/LineSource/example/index.js b/Sources/Filters/Sources/LineSource/example/index.js
index 156f13df1a6..2b4e0de3e1e 100644
--- a/Sources/Filters/Sources/LineSource/example/index.js
+++ b/Sources/Filters/Sources/LineSource/example/index.js
@@ -66,6 +66,7 @@ function updateLine() {
 gui
   .add(params, 'resolution')
   .name('Resolution')
+  .min(0)
   .onChange((value) => {
     params.resolution = Number(value);
     updateLine();
diff --git a/Sources/Interaction/Style/InteractorStyleTrackballCamera/index.js b/Sources/Interaction/Style/InteractorStyleTrackballCamera/index.js
index 0ff10f0f033..2a2cea077b5 100644
--- a/Sources/Interaction/Style/InteractorStyleTrackballCamera/index.js
+++ b/Sources/Interaction/Style/InteractorStyleTrackballCamera/index.js
@@ -421,7 +421,7 @@ function vtkInteractorStyleTrackballCamera(publicAPI, model) {
 
   //----------------------------------------------------------------------------
   publicAPI.handleMouseWheel = (callData) => {
-    const dyf = 1 - callData.spinY / model.zoomFactor;
+    const dyf = Math.exp(-callData.spinY / model.zoomFactor);
     publicAPI.dollyByFactor(model.getRenderer(callData), dyf);
   };