Tools > 3D Features > Detect 3D Features - detects a plane, cylinder, cone, or sphere in the structure of a polygon object and creates a 3D Feature sub-object there.
Segmentation section (activated by a checkbox) - divides the object into a set of relatively flat regions, separated by red separator bands. In the next step, each region will be examined for the presence of one or more 3D Features. The search for a single 3D Feature never spans more than one region, so the size of regions affects the ability to detect 3D Features.
Regions group - controls the detection of high- and low-curvature portions of the object. Relatively flat regions will appear in bright colors like the countries on a map.
Curvature Sensitivity decimal field - A higher value causes a higher number of distinct regions of relative flatness to be found.
Separator Sensitivity decimal field (0.0 to 100.0, typically 60.0 to 95.0, default 80) -
Minimum Area (units^2) decimal field - specifies the smallest allowable size of any relatively flat region that will exist on the object after regions and region separators are detected. Reducing this size causes additional regions and region separators to be generated.
Compute Regions button - Press this to detect region separators and flat regions based on the given parameters.
Editing group - adjusts the automatically detected region separators.
Remove Islands icon button - de-selects islands of selected polygons that are floating in a flat (brightly colored) region.
Remove Small Regions button - removes tiny flat regions (groups of unselected polygons that are surrounded by selected polygons) by selecting them and thus joining them to a region separator.
View Selected Only button - removes all flat regions except selected regions from the Viewing Area. Click this button, then click a point in a single flat region or click and drag the mouse to select two or more flat regions.
View All button - restores the Viewing Area to include all flat regions of the object.
Brush Size integer field - controls the size of the paintbrush that is used as a selection tool. Left-Drag the mouse to select more triangles into a region separator, or Ctrl-Left-Drag to de-select triangles from a region separator.
Detect section (activated by a checkbox) - specifies the kinds of 3D Features that are subject to detection when you press Extract.
Plane checkbox - the software searches for a plane in each region.
Cone checkbox - the software searches for a cone in each region.
Cylinder checkbox - the software searches for a cylinder in each region.
Sphere checkbox - the software searches for a sphere in each region.
Minimum Area (mm^2) decimal field - specifies the minimum surface area of 3D Features that will be found. Features with smaller area will be ignored.
Extract button - performs the detection immediately.
Remove button - removes the 3D Feature(s) that you have highlighted in the Viewing Area from the List of Detected 3D Features below.
Features section (activated by a checkbox) - allows a single 3D Feature to be designated as the active feature. The Edit group and the Statistics group operate on the one active feature.
Filter dropdown (All, Plane, Cone, Cylinder, and Sphere) - limits the members of the list to the 3D Features of a given type.
List of 3D Features with Move Up, Move Down, Flip Orientation, and Delete buttons - Highlight a name in this list to designate it a the active feature. The active feature is the one that is subject to modification in the Edit section and analysis in the Statistics section. The buttons simply adjust the order of names in the list, flip the normals of the highlighted 3D Feature, or delete a 3D Feature from the list and from the object.
Edit section (activated by a checkbox) - allows modification of the active 3D Feature's shape
Parameters section - allows modification by adjusting the Feature's descriptive parameters.
a set of Feature-specific parameters - describes the 3D Feature mathematically. These fields can be changed manually.
Accept button - saves changes to the parameters.
Reset button - rejects changes to the parameters and returns them to their original values.
Correspondence section - The "correspondence" is the set of polygons that were selected in order to seed the creation process (unless the creation was performed parametrically). The correspondence is significant because it affects a) the portion of the polygon mesh that is subject to color-coding when the Deviation Spectrum is activated, and b) the set of triangles that will be moved during Tools > 3D Features > Fit to 3D Features.
Edit button - Use standard selection tools to add to the set of polygons that correspond to the 3D Feature, or use the Ctrl key with standard selection tools to subtract from the set of polygons.
Accept button - saves changes to the correspondence.
Reset button - restores the original set of polygons.
Statistics section (activated by a checkbox) - presents a mathematical analysis of the active 3D Feature.
Maximum Distance indicator - the greatest distance between an actual point and a corresponding ideal point on the 3D Feature.
Average Distance indicator - the average distance between actual points and corresponding ideal points on the 3D Feature.
Standard Deviation indicator - the standard deviation of actual points and corresponding ideal points on the 3D Feature.
Deviation section -
Display checkbox - whether to show a color-coded representation of the difference between the ideal shape of the 3D Feature and the actual shape of the corresponding polygons.
Spectrum Name dropdown (default is "Feature", meaning that default Feature-specific values are used) - allows the selection of a named set of Deviation Spectrum Controls, as configured at Analysis > Edit Spectrum.
Deviation Spectrum Controls (available when Display is checked) - See All About Spectrums.
OK button - saves the new 3D Feature(s) to a 3D Features folder under the point or polygon object in the Model Manager and closes the dialog.
Cancel button - terminates the dialog without saving 3D Features to the object.