From 0d056fb1720f8b1bb6ea9e7d1669b44d9c3a1e66 Mon Sep 17 00:00:00 2001
From: Gundalf <gundalf01@users.sourceforge.net>
Date: Fri, 23 Jun 2006 20:43:58 +0000
Subject: [PATCH] fixed collision generation
---
NifExport/TriStripper/cache_simulator.h | 92 ++++
NifExport/TriStripper/graph_array.h | 428 ++++++++++++++++++
NifExport/TriStripper/heap_array.h | 276 ++++++++++++
NifExport/TriStripper/tri_stripper.cpp | 568 ++++++++++++++++++++++++
NifExport/TriStripper/tri_stripper.h | 385 ++++++++++++++++
5 files changed, 1749 insertions(+)
create mode 100755 NifExport/TriStripper/cache_simulator.h
create mode 100755 NifExport/TriStripper/graph_array.h
create mode 100755 NifExport/TriStripper/heap_array.h
create mode 100755 NifExport/TriStripper/tri_stripper.cpp
create mode 100755 NifExport/TriStripper/tri_stripper.h
diff --git a/NifExport/TriStripper/cache_simulator.h b/NifExport/TriStripper/cache_simulator.h
new file mode 100755
index 0000000..edad27d
--- /dev/null
+++ b/NifExport/TriStripper/cache_simulator.h
@@ -0,0 +1,92 @@
+
+#pragma once
+
+
+
+// namespace triangle_stripper
+namespace triangle_stripper {
+
+
+
+
+// FIFO Cache simulator
+class cache_simulator
+{
+public:
+
+ typedef unsigned int index;
+
+ cache_simulator();
+
+ void clear();
+ void resize(const size_t Size);
+ void reset();
+ size_t size() const;
+
+ void push(const index i, const bool CountCacheHit = false);
+
+ void ResetHitCount();
+ size_t HitCount() const;
+
+protected:
+ typedef std::deque<index> indices_deque;
+
+ indices_deque m_Cache;
+ size_t m_NbHits;
+};
+
+
+
+
+inline cache_simulator::cache_simulator() : m_NbHits(0) { }
+
+
+inline void cache_simulator::clear() {
+ m_Cache.clear();
+}
+
+
+inline void cache_simulator::resize(const size_t Size) {
+ m_Cache.resize(Size, static_cast<index>(-1));
+}
+
+
+inline void cache_simulator::reset() {
+ std::fill(m_Cache.begin(), m_Cache.end(), static_cast<index>(-1));
+ ResetHitCount();
+}
+
+
+inline size_t cache_simulator::size() const {
+ return m_Cache.size();
+}
+
+
+inline void cache_simulator::push(const index i, const bool CountCacheHit) {
+
+ // Should we count the cache hits?
+ if (CountCacheHit) {
+ if (std::find(m_Cache.begin(), m_Cache.end(), i) != m_Cache.end())
+ ++m_NbHits;
+ }
+
+ // Manage the indices cache as a FIFO structure
+ m_Cache.push_front(i);
+ m_Cache.pop_back();
+}
+
+
+inline void cache_simulator::ResetHitCount() {
+ m_NbHits = 0;
+}
+
+
+inline size_t cache_simulator::HitCount() const {
+ return m_NbHits;
+}
+
+
+
+} // namespace triangle_stripper
+
+
diff --git a/NifExport/TriStripper/graph_array.h b/NifExport/TriStripper/graph_array.h
new file mode 100755
index 0000000..0d85c68
--- /dev/null
+++ b/NifExport/TriStripper/graph_array.h
@@ -0,0 +1,428 @@
+// graph_array.h: interface for the graph_array class.
+//
+//////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2002 Tanguy Fautré.
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+// Tanguy Fautré
+// softdev@pandora.be
+//
+//////////////////////////////////////////////////////////////////////
+//
+// Semi-dynamic directed graph
+// ***************************
+//
+// Current version: 3.00 BETA 5 (17/04/2003)
+//
+// Comment: graph_array is equivalent to an array of nodes linked by
+// arcs.
+// This means you can't change the size (the number of nodes)
+// of the graph once you created it (setsize() will delete
+// any previous nodes and arcs).
+// But you can add or remove arcs.
+//
+// History: - 3.00 BETA 6 (22/09/2003) - Improved std C++ compliance
+// - 3.00 BETA 5 (17/04/2003) - Fixed template graph related functions
+// - 3.00 BETA 4 (11/12/2002) - Fixed a typo in erase_arcs
+// - 3.00 BETA 3 (04/12/2002) - Added empty()
+// - Changed some parameters from copy to reference
+// - Fixed a bug with erase_arc
+// - Un-inlined external functions
+// - Added "insert_arc" which is equivalent to "insert"
+// - 3.00 BETA 2 (16/11/2002) - Improved portability
+// - 3.00 BETA 1 (27/08/2002) - First public release
+//
+//////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+
+
+// namespace common_structures
+namespace common_structures {
+
+
+
+
+// graph_array main class
+template <class nodetype, class arctype>
+class graph_array
+{
+public:
+
+ class arc;
+ class node;
+
+ // New types
+ typedef size_t nodeid;
+ typedef typename std::vector<node>::iterator node_iterator;
+ typedef typename std::vector<node>::const_iterator const_node_iterator;
+ typedef typename std::vector<node>::reverse_iterator node_reverse_iterator;
+ typedef typename std::vector<node>::const_reverse_iterator const_node_reverse_iterator;
+
+ typedef graph_array<nodetype, arctype> _mytype;
+
+
+ // graph_array::arc class
+ class arc
+ {
+ public:
+ arc & mark() { m_Marker = true; return (* this); }
+ arc & unmark() { m_Marker = false; return (* this); }
+ bool marked() const { return m_Marker; }
+
+ node_iterator initial() const { return m_Initial; }
+ node_iterator terminal() const { return m_Terminal; }
+
+ arctype & operator * () { return m_Elem; }
+ arctype * operator -> () { return &m_Elem; }
+ const arctype & operator * () const { return m_Elem; }
+ const arctype * operator -> () const { return &m_Elem; }
+
+ protected:
+ friend class graph_array<nodetype, arctype>;
+
+ arc(const node_iterator & Initial, const node_iterator & Terminal)
+ : m_Initial(Initial), m_Terminal(Terminal), m_Marker(false) { }
+
+ arc(const node_iterator & Initial, const node_iterator & Terminal, const arctype & Elem)
+ : m_Initial(Initial), m_Terminal(Terminal), m_Elem(Elem), m_Marker(false) { }
+
+ node_iterator m_Initial;
+ node_iterator m_Terminal;
+ arctype m_Elem;
+ bool m_Marker;
+ };
+
+
+ // New types
+ typedef typename std::list<arc>::iterator out_arc_iterator;
+ typedef typename std::list<arc>::const_iterator const_out_arc_iterator;
+
+
+ // graph_array::node class
+ class node
+ {
+ public:
+ node & mark() { m_Marker = true; return (* this); }
+ node & unmark() { m_Marker = false; return (* this); }
+ bool marked() const { return m_Marker; }
+
+ bool out_empty() const { return m_OutArcs.empty(); }
+ size_t number_of_out_arcs() const { return m_OutArcs.size(); }
+
+ out_arc_iterator out_begin() { return m_OutArcs.begin(); }
+ out_arc_iterator out_end() { return m_OutArcs.end(); }
+ const_out_arc_iterator out_begin() const { return m_OutArcs.begin(); }
+ const_out_arc_iterator out_end() const { return m_OutArcs.end(); }
+
+ nodetype & operator * () { return m_Elem; }
+ nodetype * operator -> () { return &m_Elem; }
+ const nodetype & operator * () const { return m_Elem; }
+ const nodetype * operator -> () const { return &m_Elem; }
+
+ nodetype & operator = (const nodetype & Elem) { return (m_Elem = Elem); }
+
+ protected:
+ friend class graph_array<nodetype, arctype>;
+ friend class std::vector<node>;
+
+ node() : m_Marker(false) { }
+
+ std::list<arc> m_OutArcs;
+ nodetype m_Elem;
+ bool m_Marker;
+ };
+
+
+ // Construction/Destruction
+ graph_array();
+ explicit graph_array(const size_t NbNodes);
+
+ // Node related member functions
+ void clear();
+ bool empty() const;
+ void setsize(const size_t NbNodes);
+ size_t size() const;
+
+ node & operator [] (const nodeid & i);
+ const node & operator [] (const nodeid & i) const;
+
+ node_iterator begin();
+ node_iterator end();
+ const_node_iterator begin() const;
+ const_node_iterator end() const;
+
+ node_reverse_iterator rbegin();
+ node_reverse_iterator rend();
+ const_node_reverse_iterator rbegin() const;
+ const_node_reverse_iterator rend() const;
+
+ // Arc related member functions
+ size_t number_of_arcs() const;
+
+ void erase_arcs();
+ void erase_arcs(const node_iterator & Initial);
+ out_arc_iterator erase_arc(const out_arc_iterator & Pos);
+
+ out_arc_iterator insert_arc(const nodeid & Initial, const nodeid & Terminal);
+ out_arc_iterator insert_arc(const nodeid & Initial, const nodeid & Terminal, const arctype & Elem);
+ out_arc_iterator insert_arc(const node_iterator & Initial, const node_iterator & Terminal);
+ out_arc_iterator insert_arc(const node_iterator & Initial, const node_iterator & Terminal, const arctype & Elem);
+
+ // Another interface for insert_arc
+ out_arc_iterator insert(const nodeid & Initial, const nodeid & Terminal) { return insert_arc(Initial, Terminal); }
+ out_arc_iterator insert(const nodeid & Initial, const nodeid & Terminal, const arctype & Elem) { return insert_arc(Initial, Terminal, Elem); }
+ out_arc_iterator insert(const node_iterator & Initial, const node_iterator & Terminal) { return insert_arc(Initial, Terminal); }
+ out_arc_iterator insert(const node_iterator & Initial, const node_iterator & Terminal, const arctype & Elem) { return insert_arc(Initial, Terminal, Elem); }
+
+ // Optimized (overloaded) functions
+ void swap(_mytype & Right);
+ friend void swap(_mytype & Left, _mytype & Right) { Left.swap(Right); }
+
+protected:
+ size_t m_NbArcs;
+ std::vector<node> m_Nodes;
+};
+
+
+
+// Additional "low level", graph related, functions
+template <class nodetype, class arctype>
+void unmark_nodes(graph_array<nodetype, arctype> & G);
+
+template <class graph_node>
+void unmark_arcs_from_node(graph_node & N);
+
+template <class nodetype, class arctype>
+void unmark_arcs(graph_array<nodetype, arctype> & G);
+
+class unmark_arc
+{
+public:
+ template <class A>
+ void operator () (A & Arc) const { Arc.unmark(); }
+};
+
+
+
+
+//////////////////////////////////////////////////////////////////////////
+// graph_array Inline functions
+//////////////////////////////////////////////////////////////////////////
+
+template <class nodetype, class arctype>
+inline graph_array<nodetype, arctype>::graph_array() : m_NbArcs(0) { }
+
+
+template <class nodetype, class arctype>
+inline graph_array<nodetype, arctype>::graph_array(const size_t NbNodes) : m_NbArcs(0), m_Nodes(NbNodes) { }
+
+
+template <class nodetype, class arctype>
+inline void graph_array<nodetype, arctype>::clear() {
+ m_NbArcs = 0;
+ m_Nodes.clear();
+}
+
+
+
+template <class nodetype, class arctype>
+inline bool graph_array<nodetype, arctype>::empty() const {
+ return m_Nodes.empty();
+}
+
+
+template <class nodetype, class arctype>
+inline size_t graph_array<nodetype, arctype>::size() const {
+ return m_Nodes.size();
+}
+
+
+template <class nodetype, class arctype>
+inline void graph_array<nodetype, arctype>::setsize(const size_t NbNodes) {
+ clear();
+ m_Nodes.resize(NbNodes);
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::node & graph_array<nodetype, arctype>::operator [] (const nodeid & i) {
+ // Debug check
+ assert(i < size());
+
+ return m_Nodes[i];
+}
+
+
+template <class nodetype, class arctype>
+inline const typename graph_array<nodetype, arctype>::node & graph_array<nodetype, arctype>::operator [] (const nodeid & i) const {
+ // Debug check
+ assert(i < size());
+
+ return m_Nodes[i];
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::node_iterator graph_array<nodetype, arctype>::begin() {
+ return m_Nodes.begin();
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::node_iterator graph_array<nodetype, arctype>::end() {
+ return m_Nodes.end();
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::const_node_iterator graph_array<nodetype, arctype>::begin() const {
+ return m_Nodes.begin();
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::const_node_iterator graph_array<nodetype, arctype>::end() const {
+ return m_Nodes.end();
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::node_reverse_iterator graph_array<nodetype, arctype>::rbegin() {
+ return m_Nodes.rbegin();
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::node_reverse_iterator graph_array<nodetype, arctype>::rend() {
+ return m_Nodes.rend();
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::const_node_reverse_iterator graph_array<nodetype, arctype>::rbegin() const {
+ return m_Nodes.rbegin();
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::const_node_reverse_iterator graph_array<nodetype, arctype>::rend() const {
+ return m_Nodes.rend();
+}
+
+
+template <class nodetype, class arctype>
+inline size_t graph_array<nodetype, arctype>::number_of_arcs() const {
+ return m_NbArcs;
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::out_arc_iterator graph_array<nodetype, arctype>::insert_arc(const nodeid & Initial, const nodeid & Terminal) {
+ return (insert(begin() + Initial, begin() + Terminal));
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::out_arc_iterator graph_array<nodetype, arctype>::insert_arc(const nodeid & Initial, const nodeid & Terminal, const arctype & Elem) {
+ return (insert(begin() + Initial, begin() + Terminal, Elem));
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::out_arc_iterator graph_array<nodetype, arctype>::insert_arc(const node_iterator & Initial, const node_iterator & Terminal) {
+ ++m_NbArcs;
+ Initial->m_OutArcs.push_back(arc(Initial, Terminal));
+ return (--(Initial->m_OutArcs.end()));
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::out_arc_iterator graph_array<nodetype, arctype>::insert_arc(const node_iterator & Initial, const node_iterator & Terminal, const arctype & Elem) {
+ ++m_NbArcs;
+ Initial->m_OutArcs.push_back(arc(Initial, Terminal, Elem));
+ return (--(Initial->m_OutArcs.end()));
+}
+
+
+template <class nodetype, class arctype>
+inline typename graph_array<nodetype, arctype>::out_arc_iterator graph_array<nodetype, arctype>::erase_arc(const out_arc_iterator & Pos) {
+ --m_NbArcs;
+ return (Pos->initial()->m_OutArcs.erase(Pos));
+}
+
+
+template <class nodetype, class arctype>
+inline void graph_array<nodetype, arctype>::erase_arcs(const node_iterator & Initial) {
+ m_NbArcs -= (Initial->m_OutArcs.size());
+ Initial->m_OutArcs.clear();
+}
+
+
+template <class nodetype, class arctype>
+inline void graph_array<nodetype, arctype>::erase_arcs() {
+ m_NbArcs = 0;
+ for (nodeid i = 0; i < size(); ++i)
+ m_Nodes[i].m_OutArcs.clear();
+}
+
+
+template <class nodetype, class arctype>
+inline void graph_array<nodetype, arctype>::swap(_mytype & Right) {
+ std::swap(m_NbArcs, Right.m_NbArcs);
+ std::swap(m_Nodes, Right.m_Nodes);
+}
+
+
+
+//////////////////////////////////////////////////////////////////////////
+// additional functions
+//////////////////////////////////////////////////////////////////////////
+
+template <class nodetype, class arctype>
+void unmark_nodes(graph_array<nodetype, arctype> & G)
+{
+ typedef typename graph_array<nodetype, arctype>::node_iterator node_it;
+
+ for (node_it NodeIt = G.begin(); NodeIt != G.end(); ++NodeIt)
+ NodeIt->unmark();
+}
+
+
+template <class graph_node>
+void unmark_arcs_from_node(graph_node & N)
+{
+ std::for_each(N.out_begin(), N.out_end(), unmark_arc());
+}
+
+
+template <class nodetype, class arctype>
+void unmark_arcs(graph_array<nodetype, arctype> & G)
+{
+ typedef typename graph_array<nodetype, arctype>::node_iterator node_it;
+
+ for (node_it NodeIt = G.begin(); NodeIt != G.end(); ++NodeIt)
+ unmark_arcs_from_node(* NodeIt);
+}
+
+
+
+
+} // namespace common_structures
diff --git a/NifExport/TriStripper/heap_array.h b/NifExport/TriStripper/heap_array.h
new file mode 100755
index 0000000..1cd0ad8
--- /dev/null
+++ b/NifExport/TriStripper/heap_array.h
@@ -0,0 +1,276 @@
+// heap_array.h: interface for the heap_array class.
+//
+//////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2002 Tanguy Fautré.
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+// Tanguy Fautré
+// softdev@pandora.be
+//
+//////////////////////////////////////////////////////////////////////
+//
+// Semi-dynamic indexed heap
+// *************************
+//
+// Current version: 1.00 BETA 1 (24/10/2002)
+//
+// Comment: heap_array acts like a normal heap, you can push elements
+// and then get the greatest one.
+// However you cannot push any more element once an element
+// has been removed (pop, erase, etc...).
+// Elements can be modified after they've been pushed into
+// the heap via their index.
+//
+// History: -
+//
+//////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+
+
+// namespace common_structures
+namespace common_structures {
+
+
+
+
+template <class T, class CmpT = std::less<T> >
+class heap_array
+{
+public:
+
+ struct heap_is_locked { };
+
+
+ // heap_array main interface. Pre = PreCondition, Post = PostCondition
+
+ heap_array() : m_Locked(false) { } // Post: ((size() == 0) && ! locked())
+
+ void clear(); // Post: ((size() == 0) && ! locked())
+
+ void reserve(size_t Size);
+ size_t size() const;
+
+ bool empty() const;
+ bool locked() const;
+ bool removed(size_t i) const; // Pre: (valid(i))
+ bool valid(size_t i) const;
+
+ const T & top() const; // Pre: (! empty())
+ const T & peek(size_t i) const; // Pre: (valid(i) && ! removed(i))
+ const T & operator [] (size_t i) const; // Pre: (valid(i) && ! removed(i))
+
+ size_t push(const T & Elem); // Pre: (! locked()) else throw (heap_is_locked)
+
+ void pop(); // Pre: (! empty()) Post: (locked())
+ void erase(size_t i); // Pre: (valid(i) && ! removed(i)) Post: (locked())
+ void update(size_t i, const T & Elem); // Pre: (valid(i) && ! removed(i)) Post: (locked())
+
+protected:
+
+ struct linker {
+ linker(const T & Elem, size_t i) : m_Elem(Elem), m_Index(i) { }
+
+ T m_Elem;
+ size_t m_Index;
+ };
+
+ typedef std::vector<linker> linked_heap;
+ typedef std::vector<size_t> finder;
+
+ void Adjust(size_t i);
+ void Swap(size_t a, size_t b);
+ bool Less(const linker & a, const linker & b) const;
+
+ linked_heap m_Heap;
+ finder m_Finder;
+ CmpT m_Compare;
+ bool m_Locked;
+};
+
+
+
+
+//////////////////////////////////////////////////////////////////////////
+// heap_indexed Inline functions
+//////////////////////////////////////////////////////////////////////////
+
+template <class T, class CmpT>
+inline void heap_array<T, CmpT>::clear() {
+ m_Heap.clear();
+ m_Finder.clear();
+ m_Locked = false;
+}
+
+
+template <class T, class CmpT>
+inline bool heap_array<T, CmpT>::empty() const {
+ return m_Heap.empty();
+}
+
+
+template <class T, class CmpT>
+inline bool heap_array<T, CmpT>::locked() const {
+ return m_Locked;
+}
+
+
+template <class T, class CmpT>
+inline void heap_array<T, CmpT>::reserve(size_t Size) {
+ m_Heap.reserve(Size);
+ m_Finder.reserve(Size);
+}
+
+
+template <class T, class CmpT>
+inline size_t heap_array<T, CmpT>::size() const {
+ return m_Heap.size();
+}
+
+
+template <class T, class CmpT>
+inline const T & heap_array<T, CmpT>::top() const {
+ // Debug check to ensure heap is not empty
+ assert(! empty());
+
+ return m_Heap.front().m_Elem;
+}
+
+
+template <class T, class CmpT>
+inline const T & heap_array<T, CmpT>::peek(size_t i) const {
+ // Debug check to ensure element is still present
+ assert(! removed(i));
+
+ return (m_Heap[m_Finder[i]].m_Elem);
+}
+
+
+template <class T, class CmpT>
+inline const T & heap_array<T, CmpT>::operator [] (size_t i) const {
+ return peek(i);
+}
+
+
+template <class T, class CmpT>
+inline void heap_array<T, CmpT>::pop() {
+ m_Locked = true;
+
+ // Debug check to ensure heap is not empty
+ assert(! empty());
+
+ Swap(0, size() - 1);
+ m_Heap.pop_back();
+ Adjust(0);
+}
+
+
+template <class T, class CmpT>
+inline size_t heap_array<T, CmpT>::push(const T & Elem) {
+ if (m_Locked)
+ throw heap_is_locked();
+
+ size_t Id = size();
+ m_Finder.push_back(Id);
+ m_Heap.push_back(linker(Elem, Id));
+ Adjust(Id);
+
+ return Id;
+}
+
+
+template <class T, class CmpT>
+inline void heap_array<T, CmpT>::erase(size_t i) {
+ m_Locked = true;
+
+ // Debug check to ensure element is still present
+ assert(! removed(i));
+
+ size_t j = m_Finder[i];
+ Swap(j, size() - 1);
+ m_Heap.pop_back();
+ Adjust(j);
+}
+
+
+template <class T, class CmpT>
+inline bool heap_array<T, CmpT>::removed(size_t i) const {
+ return (m_Finder[i] >= m_Heap.size());
+}
+
+
+template <class T, class CmpT>
+inline bool heap_array<T, CmpT>::valid(size_t i) const {
+ return (i < m_Finder.size());
+}
+
+
+template <class T, class CmpT>
+inline void heap_array<T, CmpT>::update(size_t i, const T & Elem) {
+ // Debug check to ensure element is still present
+ assert(! removed(i));
+
+ size_t j = m_Finder[i];
+ m_Heap[j].m_Elem = Elem;
+ Adjust(j);
+}
+
+
+template <class T, class CmpT>
+inline void heap_array<T, CmpT>::Adjust(size_t i) {
+ size_t j;
+
+ // Check the upper part of the heap
+ for (j = i; (j > 0) && (Less(m_Heap[(j - 1) / 2], m_Heap[j])); j = ((j - 1) / 2))
+ Swap(j, (j - 1) / 2);
+
+ // Check the lower part of the heap
+ for (i = j; (j = 2 * i + 1) < size(); i = j) {
+ if ((j + 1 < size()) && (Less(m_Heap[j], m_Heap[j + 1])))
+ ++j;
+
+ if (Less(m_Heap[j], m_Heap[i]))
+ return;
+
+ Swap(i, j);
+ }
+}
+
+
+template <class T, class CmpT>
+inline void heap_array<T, CmpT>::Swap(size_t a, size_t b) {
+ std::swap(m_Heap[a], m_Heap[b]);
+
+ // use (size_t &) to get rid of a bogus compile warning
+ (size_t &) (m_Finder[(m_Heap[a].m_Index)]) = a;
+ (size_t &) (m_Finder[(m_Heap[b].m_Index)]) = b;
+}
+
+
+template <class T, class CmpT>
+inline bool heap_array<T, CmpT>::Less(const linker & a, const linker & b) const {
+ return m_Compare(a.m_Elem, b.m_Elem);
+}
+
+
+
+
+} // namespace common_structures
+
diff --git a/NifExport/TriStripper/tri_stripper.cpp b/NifExport/TriStripper/tri_stripper.cpp
new file mode 100755
index 0000000..3c1d44d
--- /dev/null
+++ b/NifExport/TriStripper/tri_stripper.cpp
@@ -0,0 +1,568 @@
+// tri_stripper.cpp: implementation of the Tri Stripper class.
+//
+// Copyright (C) 2002 Tanguy Fautré.
+// For conditions of distribution and use,
+// see copyright notice in tri_stripper.h
+//
+//////////////////////////////////////////////////////////////////////
+
+
+#include <assert.h>
+#include <deque>
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <list>
+#include <map>
+#include <string>
+#include <vector>
+
+#include "tri_stripper.h"
+
+
+
+
+// namespace triangle_stripper
+namespace triangle_stripper {
+
+
+
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+
+
+//////////////////////////////////////////////////////////////////////
+// Members Functions
+//////////////////////////////////////////////////////////////////////
+
+void tri_stripper::Strip(primitives_vector * out_pPrimitivesVector)
+{
+ // verify that the number of indices is correct
+ if (m_TriIndices.size() % 3 != 0)
+ throw triangles_indices_error();
+
+ // clear possible garbage
+ m_PrimitivesVector.clear();
+ out_pPrimitivesVector->clear();
+
+ // Initialize the triangle graph
+ InitTriGraph();
+
+ // Initialize the triangle priority queue
+ InitTriHeap();
+
+ // Reset the cache simulator
+ InitCache();
+
+ // Launch the triangle strip generator
+ Stripify();
+
+ // Add the triangles that couldn't be stripped
+ AddLeftTriangles();
+
+ // Free ressources
+ m_Triangles.clear();
+
+ // Put the results into the user's vector
+ std::swap(m_PrimitivesVector, (* out_pPrimitivesVector));
+}
+
+
+
+void tri_stripper::InitTriGraph()
+{
+ // Set up the graph size and complete the triangles data
+ // note: setsize() completely resets the graph as well as the node markers
+ m_Triangles.setsize(m_TriIndices.size() / 3);
+
+ for (size_t i = 0; i < m_Triangles.size(); ++i)
+ m_Triangles[i] = triangle(m_TriIndices[i * 3 + 0], m_TriIndices[i * 3 + 1], m_TriIndices[i * 3 + 2]);
+
+ // Build the edges lookup table
+ triangle_edges TriInterface;
+ TriInterface.reserve(m_Triangles.size() * 3);
+
+ for (size_t i = 0; i < m_Triangles.size(); ++i) {
+ TriInterface.push_back(triangle_edge(m_Triangles[i]->A(), m_Triangles[i]->B(), i));
+ TriInterface.push_back(triangle_edge(m_Triangles[i]->B(), m_Triangles[i]->C(), i));
+ TriInterface.push_back(triangle_edge(m_Triangles[i]->C(), m_Triangles[i]->A(), i));
+ }
+
+ // Sort the lookup table for faster searches
+ std::sort(TriInterface.begin(), TriInterface.end(), _cmp_tri_interface_lt());
+
+ // Link neighbour triangles together using the edges lookup table
+ for (size_t i = 0; i < m_Triangles.size(); ++i) {
+
+ const triangle_edge EdgeBA(m_Triangles[i]->B(), m_Triangles[i]->A(), i);
+ const triangle_edge EdgeCB(m_Triangles[i]->C(), m_Triangles[i]->B(), i);
+ const triangle_edge EdgeAC(m_Triangles[i]->A(), m_Triangles[i]->C(), i);
+
+ LinkNeighboursTri(TriInterface, EdgeBA);
+ LinkNeighboursTri(TriInterface, EdgeCB);
+ LinkNeighboursTri(TriInterface, EdgeAC);
+ }
+}
+
+
+
+void tri_stripper::LinkNeighboursTri(const triangle_edges & TriInterface, const triangle_edge Edge)
+{
+ typedef triangle_edges::const_iterator edge_const_it;
+
+ // Find the first edge equal to Edge
+ edge_const_it It = std::lower_bound(TriInterface.begin(), TriInterface.end(), Edge, _cmp_tri_interface_lt());
+
+ // See if there are any other edges that are equal
+ // (if so, it means that more than 2 triangles are sharing the same edge,
+ // which is unlikely but not impossible)
+ for (; (It != TriInterface.end()) && ((It->A() == Edge.A()) && (It->B() == Edge.B())); ++It)
+ m_Triangles.insert(Edge.TriPos(), It->TriPos());
+
+ // Note: degenerated triangles will also point themselves as neighbour triangles
+}
+
+
+
+void tri_stripper::InitTriHeap()
+{
+ m_TriHeap.clear();
+ m_TriHeap.reserve(m_Triangles.size());
+
+ // Set up the triangles priority queue
+ // The lower the number of available neighbour triangles, the higher the priority.
+ for (size_t i = 0; i < m_Triangles.size(); ++i)
+ m_TriHeap.push(triangle_degree(i, m_Triangles[i].number_of_out_arcs()));
+
+ // Remove useless triangles
+ // (Note: we had to put all of them into the heap before to ensure coherency of the heap_array object)
+ while ((! m_TriHeap.empty()) && (m_TriHeap.top().Degree() == 0))
+ m_TriHeap.pop();
+}
+
+
+
+void tri_stripper::InitCache()
+{
+ m_Cache.reset();
+}
+
+
+
+void tri_stripper::Stripify()
+{
+ // Reset the triangle strip id selector
+ m_StripID = 0;
+
+ // Reset the candidate list
+ m_NextCandidates.clear();
+
+ // Loop untill there is no available candidate triangle left
+ while (! m_TriHeap.empty()) {
+
+ // There is no triangle in the candidates list, refill it with the loneliest triangle
+ const size_t HeapTop = m_TriHeap.top().TriPos();
+ m_NextCandidates.push_back(HeapTop);
+
+ // Loop while BuildStrip can find good candidates for us
+ while (! m_NextCandidates.empty()) {
+
+ // Choose the best strip containing that triangle
+ // Note: FindBestStrip empties m_NextCandidates
+ const triangle_strip TriStrip = FindBestStrip();
+
+ // Build it if it's long enough, otherwise discard it
+ // Note: BuildStrip refills m_NextCandidates
+ if (TriStrip.Size() >= m_MinStripSize)
+ BuildStrip(TriStrip);
+ }
+
+ // We must discard the triangle we inserted in the candidate list from the heap
+ // if it led to nothing. (We simply removed it if it hasn't been removed by BuildStrip() yet)
+ if (! m_TriHeap.removed(HeapTop))
+ m_TriHeap.erase(HeapTop);
+
+ // Eliminate all the triangles that have now become useless
+ while ((! m_TriHeap.empty()) && (m_TriHeap.top().Degree() == 0))
+ m_TriHeap.pop();
+ }
+}
+
+
+
+inline tri_stripper::triangle_strip tri_stripper::FindBestStrip()
+{
+ triangle_strip BestStrip;
+ size_t BestStripDegree = 0;
+ size_t BestStripCacheHits = 0;
+
+ // Backup the cache, because it'll be erased during the simulations
+ const cache_simulator CacheBackup = m_Cache;
+
+ while (! m_NextCandidates.empty()) {
+
+ // Discard useless triangles from the candidates list
+ if ((m_Triangles[m_NextCandidates.back()].marked()) || (m_TriHeap[m_NextCandidates.back()].Degree() == 0)) {
+ m_NextCandidates.pop_back();
+
+ // "continue" is evil! But it really makes things easier here.
+ // The useless triangle is discarded, and the "while" just rebegins again
+ continue;
+ }
+
+ // Invariant: (CandidateTri's Degree() >= 1) && (CandidateTri is not marked).
+ // So it can directly be used.
+ const size_t CandidateTri = m_NextCandidates.back();
+ m_NextCandidates.pop_back();
+
+ // Try to extend the triangle in the 3 possible directions
+ for (size_t i = 0; i < 3; ++i) {
+
+ // Try a new strip with that triangle in a particular direction
+ const triangle_strip TempStrip = ExtendTriToStrip(CandidateTri, triangle_strip::start_order(i));
+
+ // We want to keep the best strip
+ // Discard strips that don't match the minimum required size
+ if (TempStrip.Size() >= m_MinStripSize) {
+
+ // Cache simulator disabled?
+ if (m_Cache.size() == 0) {
+
+ // Cache is disabled, take the longest strip
+ if (TempStrip.Size() > BestStrip.Size())
+ BestStrip = TempStrip;
+
+ // Cache simulator enabled
+ // Use other criteria to find the "best" strip
+ } else {
+
+ // Priority 1: Keep the strip with the best cache hit count
+ if (m_Cache.HitCount() > BestStripCacheHits) {
+ BestStrip = TempStrip;
+ BestStripDegree = m_TriHeap[TempStrip.StartTriPos()].Degree();
+ BestStripCacheHits = m_Cache.HitCount();
+
+ } else if (m_Cache.HitCount() == BestStripCacheHits) {
+
+ // Priority 2: Keep the strip with the loneliest start triangle
+ if ((BestStrip.Size() != 0) && (m_TriHeap[TempStrip.StartTriPos()].Degree() < BestStripDegree)) {
+ BestStrip = TempStrip;
+ BestStripDegree = m_TriHeap[TempStrip.StartTriPos()].Degree();
+
+ // Priority 3: Keep the longest strip
+ } else if (TempStrip.Size() > BestStrip.Size()) {
+ BestStrip = TempStrip;
+ BestStripDegree = m_TriHeap[TempStrip.StartTriPos()].Degree();
+ }
+ }
+ }
+ }
+
+ // Restore the cache (modified by ExtendTriToStrip) and implicitly reset the cache hit count
+ m_Cache = CacheBackup;
+ }
+
+ }
+
+ return BestStrip;
+}
+
+
+
+tri_stripper::triangle_strip tri_stripper::ExtendTriToStrip(const size_t StartTriPos, const triangle_strip::start_order StartOrder)
+{
+ typedef triangles_graph::const_out_arc_iterator const_tri_link_iter;
+ typedef triangles_graph::node_iterator tri_node_iter;
+
+ size_t Size = 1;
+ bool ClockWise = false;
+ triangle_strip::start_order Order = StartOrder;
+
+ // Begin a new strip
+ ++m_StripID;
+
+ // Mark the first triangle as used for this strip
+ m_Triangles[StartTriPos]->SetStripID(m_StripID);
+
+ // Update the cache
+ AddTriToCache((* m_Triangles[StartTriPos]), Order);
+
+
+ // Loop while we can further extend the strip
+ for (tri_node_iter TriNodeIt = (m_Triangles.begin() + StartTriPos);
+ (TriNodeIt != m_Triangles.end()) && ((m_Cache.size() == 0) || ((Size + 2) < m_Cache.size()));
+ ++Size) {
+
+ // Get the triangle edge that would lead to the next triangle
+ const triangle_edge Edge = GetLatestEdge(** TriNodeIt, Order);
+
+ // Link to a neighbour triangle
+ const_tri_link_iter LinkIt;
+ for (LinkIt = TriNodeIt->out_begin(); LinkIt != TriNodeIt->out_end(); ++LinkIt) {
+
+ // Get the reference to the possible next triangle
+ const triangle & Tri = (** (LinkIt->terminal()));
+
+ // Check whether it's already been used
+ if ((Tri.StripID() != m_StripID) && (! (LinkIt->terminal()->marked()))) {
+
+ // Does the current candidate triangle match the required for the strip?
+
+ if ((Edge.B() == Tri.A()) && (Edge.A() == Tri.B())) {
+ Order = (ClockWise) ? triangle_strip::ABC : triangle_strip::BCA;
+ AddIndexToCache(Tri.C(), true);
+ break;
+ }
+
+ else if ((Edge.B() == Tri.B()) && (Edge.A() == Tri.C())) {
+ Order = (ClockWise) ? triangle_strip::BCA : triangle_strip::CAB;
+ AddIndexToCache(Tri.A(), true);
+ break;
+ }
+
+ else if ((Edge.B() == Tri.C()) && (Edge.A() == Tri.A())) {
+ Order = (ClockWise) ? triangle_strip::CAB : triangle_strip::ABC;
+ AddIndexToCache(Tri.B(), true);
+ break;
+ }
+ }
+ }
+
+ // Is it the end of the strip?
+ if (LinkIt == TriNodeIt->out_end()) {
+ TriNodeIt = m_Triangles.end();
+ --Size;
+ } else {
+ TriNodeIt = LinkIt->terminal();
+
+ // Setup for the next triangle
+ (* TriNodeIt)->SetStripID(m_StripID);
+ ClockWise = ! ClockWise;
+ }
+ }
+
+
+ return triangle_strip(StartTriPos, StartOrder, Size);
+}
+
+
+
+inline tri_stripper::triangle_edge tri_stripper::GetLatestEdge(const triangle & Triangle, const triangle_strip::start_order Order) const
+{
+ switch (Order) {
+ case triangle_strip::ABC:
+ return triangle_edge(Triangle.B(), Triangle.C(), 0);
+ case triangle_strip::BCA:
+ return triangle_edge(Triangle.C(), Triangle.A(), 0);
+ case triangle_strip::CAB:
+ return triangle_edge(Triangle.A(), Triangle.B(), 0);
+ default:
+ return triangle_edge(0, 0, 0);
+ }
+}
+
+
+
+void tri_stripper::BuildStrip(const triangle_strip TriStrip)
+{
+ typedef triangles_graph::const_out_arc_iterator const_tri_link_iter;
+ typedef triangles_graph::node_iterator tri_node_iter;
+
+ const size_t StartTriPos = TriStrip.StartTriPos();
+
+ bool ClockWise = false;
+ triangle_strip::start_order Order = TriStrip.StartOrder();
+
+ // Create a new strip
+ m_PrimitivesVector.push_back(primitives());
+ m_PrimitivesVector.back().m_Type = PT_Triangle_Strip;
+
+ // Put the first triangle into the strip
+ AddTriToIndices((* m_Triangles[StartTriPos]), Order);
+
+ // Mark the first triangle as used
+ MarkTriAsTaken(StartTriPos);
+
+
+ // Loop while we can further extend the strip
+ tri_node_iter TriNodeIt = (m_Triangles.begin() + StartTriPos);
+
+ for (size_t Size = 1; Size < TriStrip.Size(); ++Size) {
+
+ // Get the triangle edge that would lead to the next triangle
+ const triangle_edge Edge = GetLatestEdge(** TriNodeIt, Order);
+
+ // Link to a neighbour triangle
+ const_tri_link_iter LinkIt;
+ for (LinkIt = TriNodeIt->out_begin(); LinkIt != TriNodeIt->out_end(); ++LinkIt) {
+
+ // Get the reference to the possible next triangle
+ const triangle & Tri = (** (LinkIt->terminal()));
+
+ // Check whether it's already been used
+ if (! (LinkIt->terminal()->marked())) {
+
+ // Does the current candidate triangle match the required for the strip?
+ // If it does, then add it to the Indices
+ if ((Edge.B() == Tri.A()) && (Edge.A() == Tri.B())) {
+ Order = (ClockWise) ? triangle_strip::ABC : triangle_strip::BCA;
+ AddIndex(Tri.C());
+ break;
+ }
+
+ else if ((Edge.B() == Tri.B()) && (Edge.A() == Tri.C())) {
+ Order = (ClockWise) ? triangle_strip::BCA : triangle_strip::CAB;
+ AddIndex(Tri.A());
+ break;
+ }
+
+ else if ((Edge.B() == Tri.C()) && (Edge.A() == Tri.A())) {
+ Order = (ClockWise) ? triangle_strip::CAB : triangle_strip::ABC;
+ AddIndex(Tri.B());
+ break;
+ }
+ }
+ }
+
+ // Debug check: we must have found the next triangle
+ assert(LinkIt != TriNodeIt->out_end());
+
+ // Go to the next triangle
+ TriNodeIt = LinkIt->terminal();
+ MarkTriAsTaken(TriNodeIt - m_Triangles.begin());
+
+ // Setup for the next triangle
+ ClockWise = ! ClockWise;
+ }
+}
+
+
+
+void tri_stripper::MarkTriAsTaken(const size_t i)
+{
+ typedef triangles_graph::node_iterator tri_node_iter;
+ typedef triangles_graph::out_arc_iterator tri_link_iter;
+
+ // Mark the triangle node
+ m_Triangles[i].mark();
+
+ // Remove triangle from priority queue if it isn't yet
+ if (! m_TriHeap.removed(i))
+ m_TriHeap.erase(i);
+
+ // Adjust the degree of available neighbour triangles
+ for (tri_link_iter LinkIt = m_Triangles[i].out_begin(); LinkIt != m_Triangles[i].out_end(); ++LinkIt) {
+
+ const size_t j = LinkIt->terminal() - m_Triangles.begin();
+
+ if ((! m_Triangles[j].marked()) && (! m_TriHeap.removed(j))) {
+ triangle_degree NewDegree = m_TriHeap.peek(j);
+ NewDegree.SetDegree(NewDegree.Degree() - 1);
+ m_TriHeap.update(j, NewDegree);
+
+ // Update the candidate list if cache is enabled
+ if ((m_Cache.size() > 0) && (NewDegree.Degree() > 0))
+ m_NextCandidates.push_back(j);
+ }
+ }
+}
+
+
+
+inline void tri_stripper::AddIndexToCache(const index i, bool CacheHitCount)
+{
+ // Cache simulator enabled?
+ if (m_Cache.size() > 0)
+ m_Cache.push(i, CacheHitCount);
+}
+
+
+
+inline void tri_stripper::AddIndex(const index i)
+{
+ // Add the index to the current indices array
+ m_PrimitivesVector.back().m_Indices.push_back(i);
+
+ // Run cache simulator
+ AddIndexToCache(i);
+}
+
+
+
+inline void tri_stripper::AddTriToCache(const triangle & Tri, const triangle_strip::start_order Order)
+{
+ // Add Tri indices in the right order into the indices cache simulator.
+ // And enable the cache hit count
+ switch (Order) {
+ case triangle_strip::ABC:
+ AddIndexToCache(Tri.A(), true);
+ AddIndexToCache(Tri.B(), true);
+ AddIndexToCache(Tri.C(), true);
+ return;
+ case triangle_strip::BCA:
+ AddIndexToCache(Tri.B(), true);
+ AddIndexToCache(Tri.C(), true);
+ AddIndexToCache(Tri.A(), true);
+ return;
+ case triangle_strip::CAB:
+ AddIndexToCache(Tri.C(), true);
+ AddIndexToCache(Tri.A(), true);
+ AddIndexToCache(Tri.B(), true);
+ return;
+ }
+}
+
+
+
+inline void tri_stripper::AddTriToIndices(const triangle & Tri, const triangle_strip::start_order Order)
+{
+ // Add Tri indices in the right order into the latest Indices vector.
+ switch (Order) {
+ case triangle_strip::ABC:
+ AddIndex(Tri.A());
+ AddIndex(Tri.B());
+ AddIndex(Tri.C());
+ return;
+ case triangle_strip::BCA:
+ AddIndex(Tri.B());
+ AddIndex(Tri.C());
+ AddIndex(Tri.A());
+ return;
+ case triangle_strip::CAB:
+ AddIndex(Tri.C());
+ AddIndex(Tri.A());
+ AddIndex(Tri.B());
+ return;
+ }
+}
+
+
+
+void tri_stripper::AddLeftTriangles()
+{
+ // Create the latest indices array
+ // and fill it with all the triangles that couldn't be stripped
+ primitives Primitives;
+ Primitives.m_Type = PT_Triangles;
+ m_PrimitivesVector.push_back(Primitives);
+ indices & Indices = m_PrimitivesVector.back().m_Indices;
+
+ for (size_t i = 0; i < m_Triangles.size(); ++i)
+ if (! m_Triangles[i].marked()) {
+ Indices.push_back(m_Triangles[i]->A());
+ Indices.push_back(m_Triangles[i]->B());
+ Indices.push_back(m_Triangles[i]->C());
+ }
+
+ // Undo if useless
+ if (Indices.size() == 0)
+ m_PrimitivesVector.pop_back();
+}
+
+
+
+
+} // namespace triangle_stripper
diff --git a/NifExport/TriStripper/tri_stripper.h b/NifExport/TriStripper/tri_stripper.h
new file mode 100755
index 0000000..45e0f7a
--- /dev/null
+++ b/NifExport/TriStripper/tri_stripper.h
@@ -0,0 +1,385 @@
+// tri_stripper.h: interface for the tri_stripper class.
+//
+//////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2002 Tanguy Fautré.
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+// Tanguy Fautré
+// softdev@pandora.be
+//
+//////////////////////////////////////////////////////////////////////
+//
+// Tri Stripper
+// ************
+//
+// Current version: 1.00 Final (23/04/2003)
+//
+// Comment: Triangle stripper in O(n.log(n)).
+//
+// Currently there are no protection against crazy values
+// given via SetMinStripSize() and SetCacheSize().
+// So be careful. (Min. strip size should be equal or greater
+// than 2, cache size should be about 10 for GeForce 256/2
+// and about 10-16 for GeForce 3/4.)
+//
+// History: - 1.00 FINAL (23/04/2003) - Separated cache simulator into another class
+// - Fixed English: "indice" -> "index"
+// - Fixed one or two points for better compatibility
+// with newer compilers (VC++ .NET 2003)
+// - 1.00 BETA 5 (10/12/2002) - Fixed a bug in Stripify() that could sometimes
+// cause it to go into an infinite loop.
+// (thanks to Remy for the bug report)
+// - 1.00 BETA 4 (18/11/2002) - Removed the dependency on OpenGL:
+// modified gl_primitives to primitives,
+// and gl_primitives_vector to primitives_vector;
+// and added primitive_type.
+// (thanks to Patrik for noticing this useless dependency)
+// - 1.00 BETA 3 (18/11/2002) - Fixed a bug in LinkNeightboursTri() that could cause a crash
+// (thanks to Nicolas for finding it)
+// - 1.00 BETA 2 (16/11/2002) - Improved portability
+// - 1.00 BETA 1 (27/10/2002) - First public release
+//
+//////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+
+
+
+#include "cache_simulator.h"
+
+
+
+
+// namespace triangle_stripper
+namespace triangle_stripper {
+
+
+
+
+#include "graph_array.h"
+#include "heap_array.h"
+
+
+
+class tri_stripper
+{
+public:
+
+ // New Public types
+ typedef unsigned int index;
+ typedef std::vector<index> indices;
+
+ enum primitive_type {
+ PT_Triangles = 0x0004, // = GL_TRIANGLES
+ PT_Triangle_Strip = 0x0005 // = GL_TRIANGLE_STRIP
+ };
+
+ struct primitives
+ {
+ indices m_Indices;
+ primitive_type m_Type;
+ };
+
+ typedef std::vector<primitives> primitives_vector;
+
+ struct triangles_indices_error { };
+
+
+ // constructor/initializer
+ tri_stripper(const indices & TriIndices);
+
+ // Settings functions
+ void SetCacheSize(const size_t CacheSize = 16); // = 0 will disable the cache optimizer
+ void SetMinStripSize(const size_t MinStripSize = 2);
+
+ // Stripper
+ void Strip(primitives_vector * out_pPrimitivesVector); // throw triangles_indices_error();
+
+private:
+
+ friend struct _cmp_tri_interface_lt;
+
+
+ class triangle
+ {
+ public:
+ triangle();
+ triangle(const index A, const index B, const index C);
+
+ void SetStripID(const size_t StripID);
+
+ index A() const;
+ index B() const;
+ index C() const;
+ size_t StripID() const;
+
+ private:
+ index m_A;
+ index m_B;
+ index m_C;
+ size_t m_StripID;
+ };
+
+
+ class triangle_edge
+ {
+ public:
+ triangle_edge(const index A, const index B, const size_t TriPos);
+
+ index A() const;
+ index B() const;
+ size_t TriPos() const;
+
+ private:
+ index m_A;
+ index m_B;
+ size_t m_TriPos;
+ };
+
+
+ class triangle_degree
+ {
+ public:
+ triangle_degree();
+ triangle_degree(const size_t TriPos, const size_t Degree);
+
+ size_t Degree() const;
+ size_t TriPos() const;
+
+ void SetDegree(const size_t Degree);
+
+ private:
+ size_t m_TriPos;
+ size_t m_Degree;
+ };
+
+
+ class triangle_strip
+ {
+ public:
+ enum start_order { ABC = 0, BCA = 1, CAB = 2 };
+
+ triangle_strip();
+ triangle_strip(size_t StartTriPos, start_order StartOrder, size_t Size);
+
+ size_t StartTriPos() const;
+ start_order StartOrder() const;
+ size_t Size() const;
+
+ private:
+ size_t m_StartTriPos;
+ start_order m_StartOrder;
+ size_t m_Size;
+ };
+
+
+ struct _cmp_tri_interface_lt
+ {
+ bool operator() (const triangle_edge & a, const triangle_edge & b) const;
+ };
+
+
+ struct _cmp_tri_degree_gt
+ {
+ bool operator () (const triangle_degree & a, const triangle_degree & b) const;
+ };
+
+
+ typedef common_structures::graph_array<triangle, char> triangles_graph;
+ typedef common_structures::heap_array<triangle_degree, _cmp_tri_degree_gt> triangles_heap;
+ typedef std::vector<triangle_edge> triangle_edges;
+ typedef std::vector<size_t> triangle_indices;
+ typedef std::deque<index> indices_cache;
+
+
+ void InitCache();
+ void InitTriGraph();
+ void InitTriHeap();
+ void Stripify();
+ void AddLeftTriangles();
+
+ void LinkNeighboursTri(const triangle_edges & TriInterface, const triangle_edge Edge);
+ void MarkTriAsTaken(const size_t i);
+
+ triangle_edge GetLatestEdge(const triangle & Triangle, const triangle_strip::start_order Order) const;
+
+ triangle_strip FindBestStrip();
+ triangle_strip ExtendTriToStrip(const size_t StartTriPos, const triangle_strip::start_order StartOrder);
+ void BuildStrip(const triangle_strip TriStrip);
+ void AddIndex(const index i);
+ void AddIndexToCache(const index i, bool CacheHitCount = false);
+ void AddTriToCache(const triangle & Tri, const triangle_strip::start_order Order);
+ void AddTriToIndices(const triangle & Tri, const triangle_strip::start_order Order);
+
+ const indices & m_TriIndices;
+
+ size_t m_MinStripSize;
+// size_t m_CacheSize;
+
+ primitives_vector m_PrimitivesVector;
+ triangles_graph m_Triangles;
+ triangles_heap m_TriHeap;
+ triangle_indices m_NextCandidates;
+ cache_simulator m_Cache;
+// indices_cache m_IndicesCache;
+ size_t m_StripID;
+// size_t m_CacheHits;
+};
+
+
+
+
+//////////////////////////////////////////////////////////////////////////
+// tri_stripper Inline functions
+//////////////////////////////////////////////////////////////////////////
+
+inline tri_stripper::tri_stripper(const indices & TriIndices) : m_TriIndices(TriIndices) {
+ SetCacheSize();
+ SetMinStripSize();
+}
+
+
+inline void tri_stripper::SetCacheSize(const size_t CacheSize) {
+// m_CacheSize = CacheSize;
+ m_Cache.resize(CacheSize);
+}
+
+
+inline void tri_stripper::SetMinStripSize(const size_t MinStripSize) {
+ m_MinStripSize = MinStripSize;
+}
+
+
+inline tri_stripper::triangle::triangle() { }
+
+
+inline tri_stripper::triangle::triangle(const index A, const index B, const index C) : m_A(A), m_B(B), m_C(C), m_StripID(0) { }
+
+
+inline void tri_stripper::triangle::SetStripID(const size_t StripID) {
+ m_StripID = StripID;
+}
+
+
+inline tri_stripper::index tri_stripper::triangle::A() const {
+ return m_A;
+}
+
+
+inline tri_stripper::index tri_stripper::triangle::B() const {
+ return m_B;
+}
+
+
+inline tri_stripper::index tri_stripper::triangle::C() const {
+ return m_C;
+}
+
+
+inline size_t tri_stripper::triangle::StripID() const {
+ return m_StripID;
+}
+
+
+inline tri_stripper::triangle_edge::triangle_edge(const index A, const index B, const size_t TriPos) : m_A(A), m_B(B), m_TriPos(TriPos) { }
+
+
+inline tri_stripper::index tri_stripper::triangle_edge::A() const {
+ return m_A;
+}
+
+
+inline tri_stripper::index tri_stripper::triangle_edge::B() const {
+ return m_B;
+}
+
+
+inline size_t tri_stripper::triangle_edge::TriPos() const {
+ return m_TriPos;
+}
+
+
+inline tri_stripper::triangle_degree::triangle_degree() { }
+
+
+inline tri_stripper::triangle_degree::triangle_degree(const size_t TriPos, const size_t Degree) : m_TriPos(TriPos), m_Degree(Degree) { }
+
+
+inline size_t tri_stripper::triangle_degree::Degree() const {
+ return m_Degree;
+}
+
+
+inline size_t tri_stripper::triangle_degree::TriPos() const {
+ return m_TriPos;
+}
+
+
+inline void tri_stripper::triangle_degree::SetDegree(const size_t Degree) {
+ m_Degree = Degree;
+}
+
+
+inline tri_stripper::triangle_strip::triangle_strip() : m_StartTriPos(0), m_StartOrder(ABC), m_Size(0) { }
+
+
+inline tri_stripper::triangle_strip::triangle_strip(const size_t StartTriPos, const start_order StartOrder, const size_t Size)
+ : m_StartTriPos(StartTriPos), m_StartOrder(StartOrder), m_Size(Size) { }
+
+
+inline size_t tri_stripper::triangle_strip::StartTriPos() const {
+ return m_StartTriPos;
+}
+
+
+inline tri_stripper::triangle_strip::start_order tri_stripper::triangle_strip::StartOrder() const {
+ return m_StartOrder;
+}
+
+
+inline size_t tri_stripper::triangle_strip::Size() const {
+ return m_Size;
+}
+
+
+inline bool tri_stripper::_cmp_tri_interface_lt::operator() (const triangle_edge & a, const triangle_edge & b) const {
+ const tri_stripper::index A1 = a.A();
+ const tri_stripper::index B1 = a.B();
+ const tri_stripper::index A2 = b.A();
+ const tri_stripper::index B2 = b.B();
+
+ if ((A1 < A2) || ((A1 == A2) && (B1 < B2)))
+ return true;
+ else
+ return false;
+}
+
+
+inline bool tri_stripper::_cmp_tri_degree_gt::operator () (const triangle_degree & a, const triangle_degree & b) const {
+ // the triangle with a smaller degree has more priority
+ return a.Degree() > b.Degree();
+}
+
+
+
+
+} // namespace triangle_stripper
+
+
--
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