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-- File: VrmlConverter.cdl
-- Created: Tue Feb 18 13:46:07 1997
-- Author: Alexander BRIVIN
-- <brivin@meteox.nizhny.matra-dtv.fr>
---Copyright: Matra Datavision 1997
package VrmlConverter
---Purpose:
-- Computes different kinds of presentation and converts CasCade objects
-- ( points, curves, surfaces, shapes ... ) into nodes of VRML format
-- ( package Vrml ), into specific geometry shapes ( AsciiText, Cone,
-- IndexedFaceSet, IndexedLineSet, .... ) for requested (or default) properties
-- of the geometry and its appearance ( Material, Normal, Texture2, ... )
-- and requested (or default) properties of cameras and lights ( OrthograpicCamera,
-- PerspectiveCamera, DirectionalLight, SpotLight ).
-- All requested properties of a current representation are specified
-- in aDrawer of Drawer class, which qualifies how the presentation
-- algorithms compute the presentation of a specific kind of object.
-- This includes for example color, maximal chordial deviation, etc... with default values.
-- In the result the classes of this package Add a corresponding VRML
-- description to anOStream.
uses
Vrml,
Aspect,
Poly,
TColgp,
MMgt,
Adaptor3d,
BRepAdaptor,
TopoDS,
HLRAlgo,
Quantity,
TopTools
is
---Category: Aspect classes.
-- The aspect classes qualifies how to represent
-- a given kind of object.
class Drawer;
---Purpose: qualifies the aspect properties for
-- the VRML conversation of a specific kind of object.
-- This includes for example color, maximal chordial deviation, etc...
class ShadingAspect;
---Purpose: qualifies the aspect properties for
-- the VRML conversation of a ShadedShape.
class LineAspect;
---Purpose: qualifies the aspect properties for
-- the VRML conversation of a Curve and a DeflectionCurve .
class IsoAspect;
---Purpose: qualifies the aspect properties for
-- the VRML conversation of iso curves .
class PointAspect;
---Purpose: qualifies the aspect properties for
-- the VRML conversation of a Point Set .
---Category: Presentation classes.
---Purpose: To compute different kinds of presentation, to convert
-- CasCade objects into VRML objects for requested aspect
-- properties and to add the results to the stream.
class ShadedShape;
---Purpose: computes the shading presentation of shapes
-- by triangulation algorithms.
class Curve;
---Purpose: computes the presentation of objects to be
-- seen as curves. The computation will be made
-- whith a constant number of points.
class DeflectionCurve;
---Purpose: computes the presentation of objects to be seen as
-- curves. The computation will be made according to
-- a maximal chordial deviation.
class WFRestrictedFace;
---Purpose: computes the wireframe presentation of faces with
-- restrictions by displaying a given number of U and/or
-- V isoparametric curves. The isoparametric curves are
-- drawn with a fixed number of points.
class WFDeflectionRestrictedFace;
---Purpose: computes the wireframe presentation of faces with
-- restrictions by displaying a given number of U and/or
-- V isoparametric curves. The isoparametric curves are
-- drawn with respect to a maximal chordial deviation.
class WFShape;
---Purpose: computes the wireframe presentation of compound set
-- of faces, edges and vertices by displaying a given
-- number of U and/or V isoparametric curves.
class WFDeflectionShape;
---Purpose: computes the wireframe presentation of compound
-- set of faces, edges and vertices by displaying
-- a given number of U and/or V isoparametric curves.
class HLRShape;
---Purpose: computes the presentation of objects with
-- removal of their hidden lines for a specific
-- projector.
class Projector;
---Purpose: defines the projection parameters for the hidden
-- lines removal algorithm and calculates properties of cameras
-- and lights from Vrml ( OrthograpicCamera, PerspectiveCamera,
-- DirectionalLight, PointLight, SpotLight )
-- to display all shapes of scene with arbitrary locations
-- for requested the Projection Vector .
-- Enumeration for cameras and lights from Vrml
enumeration TypeOfCamera
is
NoCamera,
PerspectiveCamera,
OrthographicCamera
end TypeOfCamera;
enumeration TypeOfLight
is
NoLight,
DirectionLight,
PointLight,
SpotLight
end TypeOfLight;
end VrmlConverter;
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