Cardinal Points
Much like the cardinal points of a compass, cardinal points can be built for different geometry types as well. These points define the key point locations for each geometry type. GR-Features build dynamic cardinal points as part of the fit settings. However, it can also be helpful to directly construct these points on imported objects or constructed geometry. The cardinal points options on the construction tab offer these options.
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Center of a line. Creates a point at the center of a line and constructs a point halfway between its endpoints.
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End of a line. Creates a point on a line at the closest end to the selection point. It allows you to continue to click on lines and build as many points as is desired.
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Center of Circles. Creates a point at the center of the selected circle. It allows you to continue to click on circles and build as many points as are desired.
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Center of Slots. Creates a point at the center of the selected slot. It allows you to continue to click on slots and build as many points as are desired.
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Center of Spheres. Creates a point at the center of the selected sphere. It allows you to continue to click on spheres and build as many points as are desired.
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Center of Cylinders. When creating points at the center of cylinders, SA will actually create three points: one point at each end on the cylinder’s axis (called When creating points at the center of cylinders, SA will actually create three points: one point at each end on the cylinder’s axis (called EndA and EndB), and a third point halfway between the endpoints (called Center). Creates 3 cardinal points from the selected cylinder. One at each end of the cylinder and a point halfway between its endpoints.
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Center of Surface Holes. The center of surface hole's option expects the user to select one or more cylindrical surface faces that represent a hole. It then will offer the following controls:
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Output Group. The name for the destination group.
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Min Dia. The minimum diameter hole for point construction. Holes smaller than this diameter will not have center points constructed.
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Max Dia. The maximum diameter hole for point construction. Holes larger than this diameter will not have center points constructed.
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Check Tolerance. This describes the accuracy of the diameter check. Smaller values may take incrementally longer, but will more accurately check the diameter of the hole. Typically, you need not adjust this value unless you encounter unexpected behavior.
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Restrict to one side of surface. This option can be used to limit extraction such that a point is built only at one end of a hole.
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