Package gp in the OpenCASCADE

//------------------------------------------------------------------------------

//    Copyright (c) 2012 eryar All Rights Reserved.

//

//        File    : Main.cpp

//        Author  : eryar@163.com

//        Date    : 2012-6-23 21:30

//        Version : 1.0v

//

//    Description : Test primitive Geometric Types in OpenCASCADE.

//

//      The Geometric Processor package, called gp.

//

//      The pg package offers classes for both 2D and 3D objects which

//      are handled by value rather than by reference. When this sort of object

//      is copied, it is copied entirely. Changes in one instance will not be 

//      reflected in another.

//

//==============================================================================

// Use Toolkit TKernel.

#pragma comment(lib,\"TKernel.lib\")

// Use Toolkit TKMath.

#pragma comment(lib, \"TKMath.lib\")

#include <gp.hxx>

#include <gp_Pnt.hxx>

#include <gp_Trsf.hxx>

#include <Precision.hxx>

void DumpPoint(const gp_Pnt& p);

int main(int argc, char* argv[])

{

    gp_Pnt  aPoint(0, 0, 0);

    // 1. Translate a point in a direction.

    // The direction determined by a gp_Vec or two gp_Pnt.

    cout<<\"Before translated:\";

    DumpPoint(aPoint);

    aPoint.Translate(gp_Pnt(2, 2, 3), gp_Pnt(10, 10, 0));

    cout<<\"After translated:\";

    DumpPoint(aPoint);

    // 2. Rotate a point.

    // Rotate a point by an axis and the rotate angle.

    cout<<\"Before rotated:\";

    DumpPoint(aPoint);

    // Roate 45 degree about Z axis.

    // Positive angle value will be rotated counterclockwise.

    aPoint.Rotate(gp::OZ(), PI/4);

    cout<<\"After rotated 45 degree about Z axis:\";

    DumpPoint(aPoint);

    // 2.1 Test Package Precision.

    if (aPoint.X() < Precision::Confusion() && aPoint.X() > -Precision::Confusion())

    {

        cout<<\"Point X value:\"<<aPoint.X()<<endl;

        cout<<\"Precision::Confusion() value:\"<<Precision::Confusion()<<endl;

    }

    aPoint.Rotate(gp::OZ(), PI/4);

    cout<<\"After rotate 45 degree about Z axis:\";

    DumpPoint(aPoint);

    // 3. Transform a point by gp_Trsf.

    gp_Trsf transform;

    transform.SetMirror(gp::OX());

    cout<<\"Before gp_Trsf:\";

    DumpPoint(aPoint);

    aPoint.Transform(transform);

    cout<<\"After gp_Trsf:\";

    DumpPoint(aPoint);

    // 4. Mirror a point.

    // 4.1 Performs the symmetrical transformation of

    // a point with respect to an axis placement which

    // is the axis of the symmetry.

    cout<<\"Before mirrored with a symmetric axis:\";

    DumpPoint(aPoint);

    aPoint.Mirror(gp::OY());

    cout<<\"After mirrored with a symmetric axis:\";

    DumpPoint(aPoint);

    // 4.2 Performs the symmetrical transformation of

    // a point with respect to a plane.

    cout<<\"Before mirrored with a symmetric plane:\";

    DumpPoint(aPoint);

    aPoint.Mirror(gp::XOY());

    cout<<\"After mirrored with a symmetric plane\";

    DumpPoint(aPoint);

    // 5. Scale a point.

    aPoint.SetCoord(1, 2, 1);

    cout<<\"Before Scaled:\";

    DumpPoint(aPoint);

    /*

    // Scale point source code...

    inline void gp_Pnt::Scale (const gp_Pnt& P,

    const Standard_Real S)

    {

    gp_XYZ XYZ = P.coord;

    XYZ.Multiply (1.0 - S);

    coord.Multiply (S);

    coord.Add      (XYZ);

    }

    */

    aPoint.Scale(gp_Pnt(1, 2, 2), 2);

    cout<<\"After Scaled:\";

    DumpPoint(aPoint);

    return 0;

}

/**

* Description: Dump point information.

*/

void DumpPoint( const gp_Pnt& p )

{

    cout<<\"(\"<<p.X()<<\",\"<<p.Y()<<\",\"<<p.Z()<<\")\"<<endl;

}

   1:  Before translated:(0,0,0)

   2:  After translated:(8,8,-3)

   3:  Before rotated:(8,8,-3)

   4:  After rotated 45 degree about Z axis:(8.88178e-016,11.3137,-3)

   5:  Point X value:8.88178e-016

   6:  Precision::Confusion() value:1e-007

   7:  After rotate 45 degree about Z axis:(-8,8,-3)

   8:  Before gp_Trsf:(-8,8,-3)

   9:  After gp_Trsf:(-8,-8,3)

  10:  Before mirrored with a symmetric axis:(-8,-8,3)

  11:  After mirrored with a symmetric axis:(8,-8,-3)

  12:  Before mirrored with a symmetric plane:(8,-8,-3)

  13:  After mirrored with a symmetric plane(8,-8,3)

  14:  Before Scaled:(1,2,1)

  15:  After Scaled:(1,2,0)

  16:  Press any key to continue . . .