Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A Continuous. An object or geometric entity characterized by uninterrupted extension in space. Control Points. A set of points that determines the shape of a spline curve. Each point on the curve is evaluated as a weighted sum of the control points. Control points lie outside the radius of curvature of the spline curve, forming a convex hull. Coordinate. A point in 3D space expressed as three numbers defining a location along a set of given axis, i.e.; the X axis, Y axis and Z axis. Coordinate-Measuring Machine (CMM). A device for measuring the physical geometrical characteristics of an object.
This machine may be manually controlled by an operator or it may be computer controlled. Measurements are defined by a probe attached to the third moving axis of this machine. Probes may be mechanical, optical, laser, or white light. Contracting Officer. A person with authority to enter into, administer, and /or terminate contracts and make related determinations and findings for the U.S. Government curvature – the rate of change per unit of arc length of the angle through which the tangent turns in rolling around the curve. Curve. An image of a continuous function (of which a straight line is a special case). Degenerate Curve or Surface.
A geometric entity that has collapsed to a point or singularity. Degree of a Curve or Surface. The integer value of the maximum exponent of a polynomial describing a curve or surface. Derivative (Model). A model derived or translated from its native format to a functionally equivalent form that is either proprietary or conforming to an international standard. Dynamics. The simulation and analysis of the causes of motion and changes in motion in a machine or mechanical system. Edge. A topological entity that connects two vertices and defines the limits of a face. Extent. The minimum box-shaped region in 3D space that completely surrounds a geometric object or entity. 59