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User Controls

 The following highlights the function of the Sub-face increment and define full interfaces only user controls for the detection and identification of a point-to-point continuous interface in a simple two block example as shown below.

 In this figure the initial unprocessed interface objects at the boundary common to both blocks are shown; the blue object corresponds to block 1 while the magenta object corresponds to block 2. Note the for block 1, the coordinates of a single point have been intentionally perturbed such that the offset to its corresponding point on the magenta interface object exceeds the Same Point Tolerance.

 With the Sub-face increment prescribed as 5, the define full interfaces only checkbox activated and the Same Point Tolerance at the default value, we press the Find one-to-one interfaces button to compute the point continuous interfaces within the domain.
As indicated by the information written to the scrolling text field (shown above), we see that no "one-to-one" interface objects have been defined. Though the majority of the corresponding points within the blue and magenta interface objects are within the tolerance, the fact that a single point comparsion falls outside the tolerance is sufficient to preclude the defintion of a point continuous interface. This is exactly what has been prescribed via the setting of the define full interfaces only checkbox. Note that the displayed information identifies the maximum offset detected for the interface objects. It is also apparent from this data that the detection algorithm compares each interface object to every other interface object; though unecessary for full-face point continuity, this is required for partial-face continuity detection.

 We now deactivate the define full interfaces only checkbox and press the Find one-to-one interfaces button once again. The results rendered in the graphical display are shown below.

 Note that five point continuous interfaces have been defined on the common face with each composed of an integaer number of like-sized chunks in both coordinate directions. The smallest is a 1x1 chunk while the largest is a 3x2 chunk. The region encompassing the point which had been perturbed has been excised and remains labeled as an unprocessed interface.


Responsible NASA Official: Ronnie Gillian
Site Curator: William T. Jones
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Last Updated: May 25, 2003