fix(LineManipulator): fix line manipulator in perpendicular vector case

Kitware · Jan 3, 2024 · 54c6c62 · 54c6c62
1 parent 24f82f2
commit 54c6c62
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/Sources/Widgets/Manipulators/LineManipulator/index.js b/Sources/Widgets/Manipulators/LineManipulator/index.js
@@ -27,7 +27,12 @@ export function projectDisplayToLine(
   const denominator = vtkMath.dot(normal, lineDirection);
 
   const result = lineDirection.slice();
-  vtkMath.multiplyScalar(result, numerator / denominator);
+  if (denominator === 0) {
+    // no change is allowed
+    vtkMath.multiplyScalar(result, 0);
+  } else {
+    vtkMath.multiplyScalar(result, numerator / denominator);
+  }
   vtkMath.add(lineOrigin, result, result);
 
   return result;