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Direct Dimensions are the foundational measurement Tools of 3D Auto-Dimensioning. Use them to measure between automatically extracted features (planes and cylinders) on a Voyager scan with sub-voxel precision. Every Direct Dimension supports tolerance definition with pass/fail color coding, and leader and label placement can be adjusted at any time after creation.
All measurements should be performed on an ROI that roughly orients your part to the correct orientation. Skipping this step is the most common cause of poorly-oriented measurements.
The Direct Dimensions Tools are available in Dimensioning Mode once Automatic Feature Extraction has run on the parent reconstruction. Every ROI built on that reconstruction inherits the extracted features, so a single extraction surfaces planes and cylinders across all child ROIs.

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Distance

The Distance Tool measures between two extracted features. The supported feature pairs and methods today are:
  • Plane to Plane — Center to Center, Max Perpendicular, Min Perpendicular, Min
  • Plane to Cylinder — Center to Center, Centroid
  • Cylinder to Cylinder — Center to Center, Centroid
Using the Distance Tool to measure the maximum perpendicular distance between two planes

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Workflow

1

Select the Distance Tool

Choose Distance from the Toolbar in Dimensioning Mode.
2

Pick two features

Click the first extracted feature in the Viewport, then click the second. Eligible features highlight on hover so you know which surfaces are available.
3

Choose method and tolerance

Pick a method from the dropdown in the Workflow Editor (the available methods depend on the feature pair you selected) and enter a tolerance.
4

Submit

Submit to compute the dimension. The result is added to the scene with a leader line and a tolerance-aware color code.
The supported method matrix is actively being extended. Reach out to Lumafield to share dimensional requirements that aren’t yet covered.

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Angle

The Angle Tool measures the angle between two features. Supported pairs:
  • Plane to Plane
  • Plane to Cylinder
  • Cylinder to Cylinder
Using the Angle Tool to measure the angle between two planes

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Workflow

1

Select the Angle Tool

Choose Angle from the Toolbar.
2

Pick two features

Select the two extracted features whose included angle you want to evaluate.
3

Add tolerance and submit

Enter the tolerance and submit. The angle and pass/fail state appear in the dimension label.

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Diameter

The Diameter Tool measures the diameter of any extracted cylinder. This is the simplest of the Direct Dimensions Tools — point and select.
Using the Diameter Tool to measure the diameter of a cylindrical feature

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Workflow

1

Select the Diameter Tool

Choose Diameter from the Toolbar.
2

Pick a cylinder

Click an extracted cylindrical feature.
3

Add tolerance and submit

Enter the tolerance and submit.

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Tolerance and pass/fail color coding

Every Direct Dimension supports tolerance definition. When a tolerance is set:
  • The dimension label is green when the measurement is within tolerance.
  • The dimension label is red when the measurement is out of tolerance.
Tolerance values can be modified after the measurement is completed — open the dimension in the Attributes Panel to update the value or method, and the color coding updates immediately. This makes it easy to iterate on tolerances without re-running the workflow.

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Adjusting leaders and labels

Once a Direct Dimension is created, use the leader and label controls in the Attributes Panel to adjust orientation and offset. This keeps complex scenes with many dimensions easy to read and helps when preparing Bookmarks, Renders, and Animations in Reporting Mode.