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-- File: Select3D_Projector.cdl
-- Created: Thu Mar 12 13:32:28 1992
-- Author: Christophe MARION
-- <cma@sdsun2> copie quasi exacte de HLRAlgo_Projector
---Copyright: Matra Datavision 1992
class Projector from Select3D inherits Transient from Standard
---Purpose: A framework to define 3D projectors.
uses
Real from Standard,
Boolean from Standard,
Trsf from gp,
GTrsf from gp,
Lin from gp,
Pnt from gp,
Vec from gp,
Ax2 from gp,
Vec2d from gp,
Pnt2d from gp,
Box from Bnd,
View from V3d
raises
NoSuchObject from Standard
is
Create(aView:View from V3d) returns Projector from Select3D;
--- Purpose: Constructs the 3D projector object defined by the 3D view aView.
Create returns Projector from Select3D;
Create(CS : Ax2 from gp)
---Purpose: Creates an axonometric projector. <CS> is the
-- viewing coordinate system.
returns Projector from Select3D;
Create(CS : Ax2 from gp;
Focus : Real from Standard)
---Purpose: Creates a perspective projector. <CS> is the
-- viewing coordinate system.
returns Projector from Select3D;
Create(T : Trsf from gp;
Persp : Boolean from Standard;
Focus : Real from Standard)
---Purpose: build a Projector with automatic minmax directions.
returns Projector from Select3D;
Create(T : Trsf from gp;
Persp : Boolean from Standard;
Focus : Real from Standard;
v1,v2,v3 : Vec2d from gp)
---Purpose: build a Projector with given minmax directions.
returns Projector from Select3D;
Create(GT : GTrsf from gp;
Persp : Boolean from Standard;
Focus : Real from Standard)
---Purpose: build a Projector with automatic minmax directions.
returns Projector from Select3D;
Set (me : mutable;
T : Trsf from gp;
Persp : Boolean from Standard;
Focus : Real from Standard)
is static;
SetView(me : mutable; V : View from V3d);
---Purpose: Sets the 3D view V used at the time of construction.
View(me) returns any View from V3d;
---Purpose: Returns the 3D view used at the time of construction.
---C++: return const&
---C++: inline
Directions(me; D1 , D2 , D3 : out Vec2d from gp)
---C++: inline
is virtual;
Scaled(me : mutable; On : Boolean from Standard = Standard_False)
---Purpose: to compute with the given scale and translation.
is virtual;
Perspective(me) returns Boolean
---Purpose: Returns True if there is a perspective transformation.
---C++: inline
is virtual;
Transformation(me) returns GTrsf from gp
---Purpose: Returns the active transformation.
---C++: inline
---C++: return const &
is virtual;
InvertedTransformation(me) returns GTrsf from gp
---Purpose: Returns the active inverted transformation.
---C++: inline
---C++: return const &
is virtual;
FullTransformation(me) returns Trsf from gp
---Purpose: Returns the original transformation.
---C++: inline
---C++: return const &
is virtual;
Focus(me) returns Real from Standard
---Purpose: Returns the focal length.
---C++: inline
raises
NoSuchObject from Standard -- if there is no perspective
is virtual;
Transform(me; D : in out Vec from gp)
---C++: inline
is virtual;
Transform(me; Pnt : in out Pnt from gp)
---C++: inline
is virtual;
Project(me; P : Pnt from gp;
Pout : out Pnt2d from gp)
---Purpose: Transform and apply perspective if needed.
is virtual;
Project(me; P : Pnt from gp;
X,Y,Z : out Real from Standard)
---Purpose: Transform and apply perspective if needed.
is static;
Project(me; P : Pnt from gp;
D1 : Vec from gp;
Pout : out Pnt2d from gp;
D1out : out Vec2d from gp)
---Purpose: Transform and apply perspective if needed.
is virtual;
BoxAdd(me; P : Pnt2d from gp;
B : out Box from Bnd)
---Purpose: Adds to the box <B> the min-max of the point <P>.
is virtual;
Shoot(me; X , Y : Real from Standard)
returns Lin from gp
---Purpose: return a line going through the eye towards the
-- 2d point <X,Y>.
is virtual;
DepthMin(me) returns Real from Standard;
---Purpose: Returns the minimum depth value (if clipping plane defined).
--- Should be used when call ::Shoot() to compute eyeline.
---C++: inline
DepthMax(me) returns Real from Standard;
---Purpose: Returns the maximum depth value (if clipping plane defined).
--- Should be used when call ::Shoot() to compute eyeline.
---C++: inline
DepthMinMax(me : mutable;
theDepthMin : in Real from Standard;
theDepthMax : in Real from Standard);
---Purpose: Setup the min/max depth values (doesn't affect
--- projection functionality itself).
--- Should be used when call ::Shoot() to compute eyeline.
SetDirection(me : mutable)
is static private;
Transform(me; P : in out Pnt from gp;
T : GTrsf from gp)
---C++: inline
is virtual;
Transform(me; D : in out Lin from gp;
T : GTrsf from gp)
---C++: inline
is virtual;
fields
myType : Integer from Standard;
myPersp : Boolean from Standard is protected;
myFocus : Real from Standard is protected;
myScaledTrsf : Trsf from gp is protected;
myGTrsf : GTrsf from gp is protected;
myInvTrsf : GTrsf from gp is protected;
myD1 : Vec2d from gp is protected;
myD2 : Vec2d from gp is protected;
myD3 : Vec2d from gp is protected;
myView : View from V3d;
myDepthMin : Real from Standard;
myDepthMax : Real from Standard;
end Projector;
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