Measure

The procedures to measure distance between 2 points and measuring the arc lengths are explained here.

 

Users can measure the following: 

 

  • Linear Measurement
    • Point to Point
    • Point to Edge
    • Point to Face
  • Arc Measurement
  • Snap Vertex
  • Vertex Info

Linear Measurement

  1. Point to Point : Measures distance between two user picked points.
  2. Point to Edge: Measures shortest distance between point and the edge picked by user.

  3. Point to Face: Measures shortest distance between point and triangle picked by user.

 

Mouse right click Context Menu

 

 

Distance Allows user to measure shortest distance between two points in the model.
Arc Allows user to measure circular arc with its length, included angle and radius.
Point To Edge Allows user to measure shortest distance between a point and an edge.
Point To Face Allows user to measure shortest distance between a point and a polygon.
Snap Vertex Allows user to pick nearest vertices of model for measurement.
Vertex Info Displays current mouse cursor hit position on the model with its x,y and z coordinates.
Compare Mesh Helps user to compare two meshes by finding its deviation against each other. Deviation vector will be added to source model as CAE vector result.

Linear Measurement

Point to Point

Click with the right most button in the Viewer Window, to pop up the Viewer Context menu and then follow the instructions as below.

  • Select 'Measure | Distance' option from the Viewer context Menu or click ICON from toolbar.
  • Click 2 points of interest on the model to measure the distance.
  • The points clicked are highlighted in red color and a line is drawn between the end points.
  • An annotated label with distance value is attached to the middle point of line drawn.

Point to Edge

  • Click 'Measure | Point to Edge' option in the context menu.

  • Click a point on a model and click on a model for closest triangle edge.

  • The point and the closest edge will be highlighted in red color. Edge is extended if foot of perpendicular does not lie in the edge segment.

  • An annotated label with distance value is attached to the middle point of line drawn.

Point to Face

  • Click Measure | Point to Face' options in the context menu

  • Click a point on a model and click on a model triangle.

  • The point and triangle points will be highlighted in red color.

  • An annotated label with distance value is attached to the middle point of line drawn.

 

 

Arc Measurement

Click with the right most button in the Viewer Window, to pop up the Viewer Context menu and then follow the instructions as below.

  • Click 'Measure | Arc' option from viewer context menu.
  • Click on 3 points of interest to create Arc
  • An arc is drawn from start point to end point passing through the second point.
  • All three points are highlighted in red color.
  • An arrow is drawn from center of arc to the curve to denote the radius.
  • An annotated label with arc information is attached to the center of arc.
  • Curve hidden behind the model is drawn with dashed lines.

 

Snap Vertex

  • This enables user to select a nearest vertex of model through mouse click while measuring distance or an arc.

  • User can use Snap Vertex option to assure that the arc computed and drawn is passing through actual arc points of model.

Below is the snap shot of same arc measurement with snap vertex enabled

 

Vertex Info

  • When this option is selected, user can see a label with the X, Y, Z coordinates of an exiting vertex, as he moves the mouse on the model.

 

 

Compare Mesh Panel

Source Select source model.
Target Select target model.
Max. Deviation Specify maximum deviation of interest. This value is used as a bound to select target mesh geometry. Default value is computed based on the source model bounding radius. Specify maximum deviation of interest. This value is used as a bound to select target mesh geometry. Default value is computed based on the source model bounding radius.
Compare Options Select compare mode.
1. Same Part: Parts with same name are compared.
2. Visible Parts: Each source part is compared with all visible target parts.
3. All Parts: Each source part is compared with all target parts
Add to Viewpoint New result will be displayed and added as a viewpoint.
Set Part Max Deviation All nodes of the part are set with one maximum distance value. This will highlight modified parts.
Compare Click Compares to compute and display deviation result.
New result (or instance) is added to the CAE result list.

Note:

  • If 'Add to Viewpoint' option is ON, a viewpoint with a name '[sourcemodel]_Vs_[targetmodel]_[maxDistanceValue]_[compareMode]' will be created under the viewpath 'Compare_Mesh'.
  • User can not compare same models again with same dialog parameters
  • Max. Deviation:

    Max. Deviation is used to filter the number of triangles in target model used for finding shortest distance for comparison. When Max. Deviation is a large value, more number of triangles are considered and computation can be slow. When no triangles are found within this limit, a large value is set as distance. The default value for the maximum deviation is set based on source model bounding box. User has to specify Max. Deviation based on the distance that need to be measured. For quick analysis, user can set a small value based on the size of triangles.

  • Model/Part Transformation:

    All the model and part transformations (Pick & Move, Explode) are considered while computing the deviation.

  • Set Part Max Deviation

    First deviation for each node for a part is computed. Then,

    If the option is false, the deviation for each node is stored as CAE result.

    If the option is true, then all nodes of the part are set with same maximum part deviation. This way a part will have same result or color. The parts with deviation will get highlighted using this option.

     

    Contour without Part max deviation Contour with Part max deviation

 

 

Compare Options

Compare Mode Description
Same Part The parts with same name from each model will be considered for comparison.
Visible Parts Each part of source model will be compared with all visible parts in the target model.
All parts Each part of source model will be compared with all parts of target model.

Steps

  1. Load a cax file which contains at least two models. 'Measure | Compare mesh' menu item will be enabled.
  2. Select Source Model.
  3. Select Target Model.
  4. Specify Max.Deviation if necessary.
  5. Select Compare Mode from Compare Options.
  6. Click Compare.
  7. New CAE result with name "Compare [Target Model Name]" will be created with new instance name "Max.Deviation: [Deviation Value]" to Source Model.
  8. User can create new comparison of same models by changing Max.Deviation value. It will be appended to the same result as another instance or iteration.
  9. The same result is selected and applied for color plot.
  10. User can handle the result as a CAE result.

How meshes are compared?

  • Compare mesh option is provided for comparing mesh geometry between two models.

  • User need to select appropriate parts in each models for comparison.

  • A vertex set from first (reference) model is compared with all triangles in the second model. The nearest distance from each vertex in first model to all the triangles in the second model is computed and stored as a new result in the first model. This result is displayed as a color plot. User specified distance limit is used to filter triangles from second model.

  • It is recommended to use model with higher mesh density as first model.

  • The models used for the comparison can come from CAD or CAE models.

  • Distance from a vertex to a triangle is computed as follow:

 

 

See Also