207 lines
7.5 KiB
C++
207 lines
7.5 KiB
C++
/* ========================================================================= *
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* *
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* OpenMesh *
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* Copyright (c) 2001-2015, RWTH-Aachen University *
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* Department of Computer Graphics and Multimedia *
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* All rights reserved. *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* This file is part of OpenMesh. *
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*---------------------------------------------------------------------------*
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* *
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* Redistribution and use in source and binary forms, with or without *
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* modification, are permitted provided that the following conditions *
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* are met: *
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* *
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* 1. Redistributions of source code must retain the above copyright notice, *
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* this list of conditions and the following disclaimer. *
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* *
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* 2. Redistributions in binary form must reproduce the above copyright *
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* notice, this list of conditions and the following disclaimer in the *
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* documentation and/or other materials provided with the distribution. *
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* *
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* 3. Neither the name of the copyright holder nor the names of its *
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* contributors may be used to endorse or promote products derived from *
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* this software without specific prior written permission. *
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* *
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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* *
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* ========================================================================= */
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/*===========================================================================*\
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* *
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* $Revision$ *
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* $Date$ *
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* *
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\*===========================================================================*/
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//=============================================================================
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//
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// CLASS newClass - IMPLEMENTATION
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//
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//=============================================================================
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//== INCLUDES =================================================================
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#include <OpenMesh/Tools/VDPM/VHierarchyWindow.hh>
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#include <cstring>
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#ifndef WIN32
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#else
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#if defined(__MINGW32__)
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#include <stdlib.h>
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#include <string.h>
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#endif
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#endif
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//== NAMESPACES ===============================================================
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namespace OpenMesh {
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namespace VDPM {
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//== IMPLEMENTATION ==========================================================
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VHierarchyWindow::
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VHierarchyWindow() :
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vhierarchy_(NULL), buffer_(NULL),buffer_min_ (0), buffer_max_(0), window_min_(0), window_max_(0), current_pos_(0) , n_shift_(0)
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{
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}
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VHierarchyWindow::
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VHierarchyWindow(VHierarchy &_vhierarchy) :
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vhierarchy_(&_vhierarchy),buffer_(NULL),buffer_min_ (0), buffer_max_(0), current_pos_(0) , window_min_(0), window_max_(0) , current_pos_(0) ,n_shift_(0)
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{
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}
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VHierarchyWindow::
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~VHierarchyWindow(void)
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{
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if (buffer_ != NULL)
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free(buffer_);
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}
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bool
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VHierarchyWindow::
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update_buffer(VHierarchyNodeHandle _node_handle)
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{
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if (underflow(_node_handle) != true && overflow(_node_handle) != true)
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return false;
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// tightly update window_min_ & window_max_
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int none_zero_pos;
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for (none_zero_pos=int(buffer_size()-1); none_zero_pos >= 0; --none_zero_pos)
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{
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if (buffer_[none_zero_pos] != 0) break;
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}
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window_max_ = buffer_min_ + none_zero_pos + 1;
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for(none_zero_pos=0; none_zero_pos < int(buffer_size()); ++none_zero_pos)
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{
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if (buffer_[none_zero_pos] != 0) break;
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}
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window_min_ = buffer_min_ + none_zero_pos;
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assert(window_min_ < window_max_);
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while (underflow(_node_handle) == true) buffer_min_ /= 2;
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while (overflow(_node_handle) == true)
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{
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buffer_max_ *= 2;
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if (buffer_max_ > vhierarchy_->num_nodes() / 8)
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buffer_max_ = 1 + vhierarchy_->num_nodes() / 8;
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}
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unsigned char *new_buffer = (unsigned char *) malloc(buffer_size());
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memset(new_buffer, 0, buffer_size());
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memcpy(&(new_buffer[window_min_-buffer_min_]),
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&(buffer_[none_zero_pos]),
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window_size());
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free(buffer_);
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buffer_ = new_buffer;
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return true;
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}
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void
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VHierarchyWindow::init(VHierarchyNodeHandleContainer &_roots)
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{
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if (buffer_ != NULL)
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free(buffer_);
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buffer_min_ = 0;
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buffer_max_ = _roots.size() / 8;
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if (_roots.size() % 8 > 0)
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++buffer_max_;
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buffer_ = (unsigned char *) malloc(buffer_size());
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memset(buffer_, 0, buffer_size());
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window_min_ = 0;
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window_max_= 0;
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current_pos_ = 0;
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n_shift_ = 0;
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for (unsigned int i=0; i<_roots.size(); i++)
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{
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activate(VHierarchyNodeHandle((int) i));
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}
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}
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void
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VHierarchyWindow::
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update_with_vsplit(VHierarchyNodeHandle _parent_handle)
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{
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VHierarchyNodeHandle
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lchild_handle = vhierarchy_->lchild_handle(_parent_handle),
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rchild_handle = vhierarchy_->rchild_handle(_parent_handle);
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assert(is_active(_parent_handle) == true);
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assert(is_active(lchild_handle) != true);
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assert(is_active(rchild_handle) != true);
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inactivate(_parent_handle);
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activate(rchild_handle);
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activate(lchild_handle);
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}
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void
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VHierarchyWindow::
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update_with_ecol(VHierarchyNodeHandle _parent_handle)
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{
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VHierarchyNodeHandle
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lchild_handle = vhierarchy_->lchild_handle(_parent_handle),
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rchild_handle = vhierarchy_->rchild_handle(_parent_handle);
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assert(is_active(_parent_handle) != true);
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assert(is_active(lchild_handle) == true);
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assert(is_active(rchild_handle) == true);
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activate(_parent_handle);
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inactivate(rchild_handle);
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inactivate(lchild_handle);
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}
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//=============================================================================
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} // namespace VDPM
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} // namespace OpenMesh
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//=============================================================================
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