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-- File: GProp.cdl
-- Created: Mon Aug 24 17:41:08 1992
-- Created: Tue Mar 12 17:51:12 1991
-- Author: Michel CHAUVAT
-- JCV - January 1992
---Copyright: Matra Datavision 1992
package GProp
--- Purpose:
-- This package defines algorithmes to compute the global properties
-- of a set of points, a curve, a surface, a solid (non infinite
-- region of space delimited with geometric entities), a compound
-- geometric system (heterogeneous composition of the previous
-- entities).
--
-- Global properties are :
-- . length, area, volume,
-- . centre of mass,
-- . axis of inertia,
-- . moments of inertia,
-- . radius of gyration.
--
-- It provides also a class to compile the average point or
-- line of a set of points.
uses
Standard,
TColStd,
TColgp,
gp,
math,
GeomAbs
is
exception UndefinedAxis inherits DomainError;
--- Purpose :
-- This exception is raised when a method makes reference to
-- an undefined inertia axis of symmetry.
enumeration EquaType
is Plane, Line, Point, Space, None end;
enumeration ValueType
is Mass,
CenterMassX, CenterMassY, CenterMassZ,
InertiaXX, InertiaYY, InertiaZZ,
InertiaXY, InertiaXZ, InertiaYZ,
Unknown
end;
--- Purpose : Algorithmes :
class GProps;
--- Purpose :
-- Computes the global properties of a compound geometric
-- system in 3d space. It gives facilities to compose the
-- properties of hetegogeneous elements of the system
-- (PGProps, CGProps, SGProps, VGProps or GProps). A density
-- can be associated with each component of the system.
class PGProps;
--- Purpose :
-- Computes the global properties of a set of points in 3d.
-- This class inherits GProps.
generic class CGProps;
---Purpose :
-- Computes the global properties of a bounded
-- curve in 3d. This class inherits GProps.
class CelGProps;
---Purpose :
-- Computes the global properties of a gp curve in 3d
-- This class inherits GProps.
generic class SGProps;
---Purpose :
-- Computes the global properties and the area of a bounded
-- surface in 3d. This class inherits GProps.
class SelGProps;
---Purpose :
-- Computes the global properties and the area of a bounded
-- elementary surface in 3d. This class inherits GProps.
generic class VGProps;
---Purpose :
-- Computes the global properties and the volume of a region
-- of space. This class inherits GProps.
generic class VGPropsGK, UFunction, TFunction;
---Purpose :
-- Computes the global properties and the volume of a region
-- of space by adaptive Gauss-Kronrod integration.
-- This class inherits GProps.
class VelGProps;
---Purpose :
-- Computes the global properties and the volume of a region
-- of space. the region of space is defined by an elementary
-- surface. This class inherits GProps.
class PrincipalProps;
---Purpose :
-- Returns the principal inertia properties of a GProps.
--- Purpose :
-- The following abstract classes define templates
-- with the minimum of methods required to implement
-- the computation of the global properties for a curve
-- or a surface.
deferred generic class CurveTool;
deferred generic class FaceTool;
deferred generic class DomainTool;
--
-- Class to compute the average plane or line of a set of points.
--
class PEquation;
--- Purpose : methods of package
HOperator (G, Q : Pnt from gp; Mass : Real; Operator : out Mat from gp);
--- Purpose : Computes the matrix Operator, referred to as the
-- "Huyghens Operator" of a geometric system at the
-- point Q of the space, using the following data :
-- - Mass, i.e. the mass of the system,
-- - G, the center of mass of the system.
-- The "Huyghens Operator" is used to compute
-- Inertia/Q, the matrix of inertia of the system at
-- the point Q using Huyghens' theorem :
-- Inertia/Q = Inertia/G + HOperator (Q, G, Mass)
-- where Inertia/G is the matrix of inertia of the
-- system relative to its center of mass as returned by
-- the function MatrixOfInertia on any GProp_GProps object.
end GProp;
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