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Surface Statistics

The Surface Statistics button provides access to surface mesh analysis tools through a dropdown menu. These tools calculate geometric and topological statistics for surface mesh objects.

Accessing the Tools​

  1. Navigate to the Measure tab in the ribbon
  2. Click the Surface Statistics dropdown button in the Statistics section
  3. Select one of the available options

Available Tools​

Whole Surface Mesh Statistics​

Calculate statistics for the active or all visible surfaces. Select an individual triangle in the 3D view to inspect its properties.

Options​

ControlDescription
TargetSelect the analysis target
Select statisticsOpen dialog to choose which statistics to calculate

Target Options​

OptionDescription
Active surface objectCalculate statistics for the active surface
Visible surface object(s)Calculate statistics for all visible surfaces
Triangle selectionCalculate statistics for a selected triangle in the 3D view
Triangle Selection Mode

Left-click on the surface in the 3D view to select a triangle. Hold the Alt key to enable spinning, zooming, and panning while in selection mode.

Output Tables​

TableDescription
StatisticsCalculated statistics for the target
Individual visible surface statisticsPer-surface breakdown when multiple surfaces are visible

Per-Region Surface Mesh Statistics​

This tool calculates and displays statistics for the connected regions within the active surface. Each region is presented with its associated statistics, 3D visualization, and a histogram of the target metric.

Connected regions are spatially separate parts of a surface mesh that are not connected by shared edges or vertices.

Options​

ControlDescription
Select statisticsOpen dialog to choose which statistics to calculate
Target metricSelect the metric for histogram analysis
Lookup tableColor lookup table for visualization

Histogram​

ControlDescription
Y-axisLinear or Logarithmic scale
Number of binsTotal bins for the histogram (2–100,000, default: 10)

Output Tables​

TableDescription
Individual region statisticsPer-region statistics breakdown
Overall descriptive statisticsSummary statistics across all regions
Whole mesh statisticsCombined statistics for the entire mesh

Annotation​

ControlDescription
Show annotationDisplay annotations in the 3D view at region centroid or picked position
Copy annotation to MeasurementConvert annotation to a measurement object

Annotation Behavior:

  • If Centroid X, Y, and Z statistics are selected, the annotation anchor aligns with the region centroid
  • If centroid statistics are not selected, the picked position determines the anchor point

Available Statistics​

Surface mesh statistics include:

Geometric Statistics​

  • Surface Area (mm²)
  • Volume (mm³) — for closed surfaces
  • Bounding Box dimensions
  • Centroid position (X, Y, Z)
  • Principal Axes orientation

Shape Metrics​

  • Elongation
  • Flatness
  • Sphericity
  • Roundness
  • Equivalent Spherical Radius
  • Feret Diameter

Topological Statistics​

  • Number of Points
  • Number of Triangles
  • Number of Edges
  • Number of Connected Regions
  • Euler Characteristic
  • Genus

Quality Metrics​

  • Minimum Edge Length
  • Maximum Edge Length
  • Average Edge Length
  • Triangle Area (min, max, mean)
  • Aspect Ratio statistics

Workflow​

Basic Surface Analysis​

  1. Select a surface mesh object or make it visible
  2. Open Surface Statistics > Whole Surface Mesh Statistics
  3. Select the target (Active surface or Visible surfaces)
  4. Click Select statistics to choose metrics
  5. View results in the statistics table

Per-Region Analysis​

  1. Open Surface Statistics > Per-Region Surface Mesh Statistics
  2. Select a target metric for histogram visualization
  3. Choose a lookup table for color coding
  4. Review individual region statistics in the table
  5. Enable Show annotation to visualize regions in 3D

Export​

Click Export... to save statistics and histogram to disk.