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825aa485a3
1) New Graphic3d_TransformPers structure for defining parameters and algorithm methods, featuring:
a) application of transformation to projection and world view matrices;
b) computation of model-world transformation of persistent object;
c) computation of transformed bounding box of persistent object.
2) Transform persistence algorithm does not make any changes to model-world transformation of object (deals with projection and world view matrices only), thus making possible to employ local transformation in a usual way.
3) Support of BVH selection for transform persistent objects (pan, rotate, zoom, trihedron persistence only).
4) Support efficient frustum culling for transform persistent objects (pan, rotate, zoom, trihedron persistence only).
5) Support of z-fitting algorithm for world-view space transform persistent objects (rotate, zoom persistence only).
6) Rewrite usage of transform persistence structures and utilities classes:
a) Replaced Graphic3d_CTransPers, TEL_TRANSFORM_PERSISTENCE by Graphic3d_TransformPers;
b) Move functions from OpenGl_Utils.hxx to Graphic3d_TransformUtils.hxx;
c) Extract matrix stack class from OpenGl_Utils.hxx to OpenGl_MatrixStack.hxx;
7) New class Graphic3d_WorldViewProjState to keep track of projection, world view matrices changes for a camera.
8) New test case bugs/vis/bug26344.
9) Renamed method Graphic3d_Camera::ModelViewState of to ::WorldViewState for consistency.
131 lines
4.8 KiB
C++
131 lines
4.8 KiB
C++
// Created on: 2014-08-15
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// Created by: Varvara POSKONINA
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// Copyright (c) 2005-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <Bnd_Box.hxx>
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#include <BVH_BinnedBuilder.hxx>
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#include <SelectMgr_SelectableObjectSet.hxx>
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//=======================================================================
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// function : SelectMgr_SelectableObjectSet
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// purpose : Creates new empty objects set and initializes BVH tree
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// builder to Binned builder with 1 element per list
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//=======================================================================
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SelectMgr_SelectableObjectSet::SelectMgr_SelectableObjectSet()
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{
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myBuilder = new BVH_BinnedBuilder<Standard_Real, 3, 32> (1, 32, Standard_False);
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}
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//=======================================================================
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// function : Append
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// purpose : Adds new object to the set and marks BVH tree for rebuild
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//=======================================================================
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Standard_Boolean SelectMgr_SelectableObjectSet::Append (const Handle(SelectMgr_SelectableObject)& theObject)
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{
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Standard_Integer aSize = Size();
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if (aSize < myObjects.Add (theObject))
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{
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MarkDirty();
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return Standard_True;
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}
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return Standard_False;
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}
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//=======================================================================
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// function : Remove
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// purpose : Removes object theObject from set and marks BVH tree for
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// rebuild
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//=======================================================================
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Standard_Boolean SelectMgr_SelectableObjectSet::Remove (const Handle(SelectMgr_SelectableObject)& theObject)
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{
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const Standard_Integer anIndex = myObjects.FindIndex (theObject);
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if (anIndex != 0)
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{
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if (anIndex != Size())
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{
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Swap (anIndex - 1, Size() - 1);
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}
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myObjects.RemoveLast();
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MarkDirty();
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return Standard_True;
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}
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return Standard_False;
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}
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//=======================================================================
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// function : Box
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// purpose : Returns bounding box of object with index theIndex
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//=======================================================================
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Select3D_BndBox3d SelectMgr_SelectableObjectSet::Box (const Standard_Integer theIndex) const
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{
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const Handle(SelectMgr_SelectableObject)& anObject = GetObjectById (theIndex);
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Bnd_Box aBox;
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anObject->BoundingBox (aBox);
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if (aBox.IsVoid())
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return Select3D_BndBox3d();
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return Select3D_BndBox3d (SelectMgr_Vec3 (aBox.CornerMin().X(), aBox.CornerMin().Y(), aBox.CornerMin().Z()),
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SelectMgr_Vec3 (aBox.CornerMax().X(), aBox.CornerMax().Y(), aBox.CornerMax().Z()));
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}
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//=======================================================================
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// function : Center
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// purpose : Returns center of object with index theIndex in the set
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// along the given axis theAxis
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//=======================================================================
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Standard_Real SelectMgr_SelectableObjectSet::Center (const Standard_Integer theIndex,
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const Standard_Integer theAxis) const
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{
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Select3D_BndBox3d aBndBox = Box (theIndex);
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return (aBndBox.CornerMin()[theAxis] +
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aBndBox.CornerMax()[theAxis]) * 0.5;
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}
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//=======================================================================
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// function : Swap
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// purpose : Swaps items with indexes theIndex1 and theIndex2 in the set
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//=======================================================================
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void SelectMgr_SelectableObjectSet::Swap (const Standard_Integer theIndex1,
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const Standard_Integer theIndex2)
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{
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const Standard_Integer aIndex1 = theIndex1 + 1;
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const Standard_Integer aIndex2 = theIndex2 + 1;
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Handle(SelectMgr_SelectableObject) anObject1 = myObjects.FindKey (aIndex1);
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Handle(SelectMgr_SelectableObject) anObject2 = myObjects.FindKey (aIndex2);
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myObjects.Substitute (aIndex1, EMPTY_OBJ);
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myObjects.Substitute (aIndex2, anObject1);
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myObjects.Substitute (aIndex1, anObject2);
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}
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//=======================================================================
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// function : Size
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// purpose : Returns size of objects set
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//=======================================================================
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Standard_Integer SelectMgr_SelectableObjectSet::Size() const
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{
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return myObjects.Size();
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}
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