/usr/include/oce/SelectMgr_FrustumBuilder.hxx is in liboce-visualization-dev 0.18.2-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Created by: Varvara POSKONINA
// Copyright (c) 2005-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#ifndef _SelectMgr_FrustumBuilder_HeaderFile
#define _SelectMgr_FrustumBuilder_HeaderFile
#include <Standard_DefineHandle.hxx>
#include <Graphic3d_Camera.hxx>
#include <Precision.hxx>
#include <SelectMgr_VectorTypes.hxx>
//! The purpose of this class is to provide unified interface for building
//! selecting frustum depending on current camera projection and orientation
//! matrices, window size and viewport parameters.
class SelectMgr_FrustumBuilder : public Standard_Transient
{
public:
//! Creates new frustum builder with empty matrices
SelectMgr_FrustumBuilder();
//! Stores current orientation matrix
void SetOrientation (const Graphic3d_Mat4d& theOrientation);
//! Stores current projection matrix
void SetProjection (const Graphic3d_Mat4d& theProjection);
//! Stores current window width and height
void SetWindowSize (const Standard_Integer theWidth,
const Standard_Integer theHeight);
//! Stores current viewport coordinates
void SetViewport (const Standard_Real theX,
const Standard_Real theY,
const Standard_Real theWidth,
const Standard_Real theHeight);
void InvalidateViewport();
//! Calculates signed distance between plane with equation
//! theEq and point thePnt
Standard_Real SignedPlanePntDist (const SelectMgr_Vec3& theEq,
const SelectMgr_Vec3& thePnt) const;
//! Projects 2d screen point onto view frustum plane:
//! theZ = 0 - near plane,
//! theZ = 1 - far plane
gp_Pnt ProjectPntOnViewPlane (const Standard_Real& theX,
const Standard_Real& theY,
const Standard_Real& theZ) const;
DEFINE_STANDARD_RTTI(SelectMgr_FrustumBuilder)
private:
//! Unprojects point from NDC coords to 3d world space
gp_Pnt unProject (const gp_Pnt& thePnt) const;
private:
Graphic3d_Mat4d myOrientation;
Graphic3d_Mat4d myProjection;
Standard_Integer myWidth;
Standard_Integer myHeight;
NCollection_Vec4<Standard_Real> myViewport;
Standard_Boolean myIsViewportSet;
};
DEFINE_STANDARD_HANDLE(SelectMgr_FrustumBuilder, Standard_Transient)
#endif // _SelectMgr_FrustumBuilder_HeaderFile
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