mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-11-26 12:15:53 +01:00
72edf1c720
many unused functions and variables are now commented out You'll still get tons of warnings, which should mostly fall in one of the following categories: 1. Unnecessary variables or values generated from .es scripts 2. Pointers assigned to from functions with side-effects: DO NOT REMOVE! Like CEntity *penNew = CreateEntity_t(...); - even if penNew isn't used, CreateEntity() must be called there!
1310 lines
41 KiB
C++
1310 lines
41 KiB
C++
/* Copyright (c) 2002-2012 Croteam Ltd.
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as published by
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the Free Software Foundation
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
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#include "Engine/StdH.h"
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#include <Engine/Templates/BSP.h>
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#include <Engine/Templates/BSP_internal.h>
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#include <Engine/Base/Stream.h>
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#include <Engine/Base/CRC.h>
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#include <Engine/Math/Vector.h>
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#include <Engine/Math/Plane.h>
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#include <Engine/Math/OBBox.h>
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#include <Engine/Math/Functions.h>
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#include <Engine/Templates/StaticStackArray.cpp>
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#include <Engine/Templates/DynamicArray.cpp>
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// epsilon value used for BSP cutting
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//#define BSP_EPSILON ((Type) 0.015625) // 1/2^6 ~= 1.5 cm
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#define BSP_EPSILON Type((1.0/65536.0)*4*mth_fCSGEpsilon) // 1/2^16
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//#define BSP_EPSILON Type(0.00390625) // 1/2^8
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//#define EPSILON (1.0f/8388608.0f) // 1/2^23
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//#define EPSILON 0.0009765625f // 1/2^10
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//#define EPSILON 0.03125f // 1/2^5
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//#define EPSILON 0.00390625f // 1/2^8
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template <class Type>
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inline BOOL EpsilonEq(const Type &a, const Type &b) { return Abs(a-b)<=BSP_EPSILON; };
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template <class Type>
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inline BOOL EpsilonNe(const Type &a, const Type &b) { return Abs(a-b)> BSP_EPSILON; };
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/////////////////////////////////////////////////////////////////////
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// BSP vertex
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/*
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* Assignment operator with coordinates only.
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*/
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template<class Type, int iDimensions>
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BSPVertex<Type, iDimensions> &BSPVertex<Type, iDimensions>::operator=(const Vector<Type, iDimensions> &vCoordinates)
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{
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*(Vector<Type, iDimensions> *)this = vCoordinates;
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return *this;
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}
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/////////////////////////////////////////////////////////////////////
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// BSP vertex container
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/*
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* Default constructor.
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*/
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template<class Type, int iDimensions>
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BSPVertexContainer<Type, iDimensions>::BSPVertexContainer(void)
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{
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}
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template<class Type, int iDimensions>
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void BSPVertexContainer<Type, iDimensions>::AddVertex(const Vector<Type, iDimensions> &vPoint)
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{
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bvc_aVertices.Push() = vPoint;
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}
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/*
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* Initialize for a direction.
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*/
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template<class Type, int iDimensions>
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void BSPVertexContainer<Type, iDimensions>::Initialize(const Vector<Type, iDimensions> &vDirection)
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{
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bvc_vDirection = vDirection;
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// init array of vertices
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bvc_aVertices.SetAllocationStep(32);
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// find largest axis of direction vector
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INDEX iMaxAxis = 0;
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Type tMaxAxis = (Type)0;//vDirection(1);
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for( INDEX iAxis=1; iAxis<=iDimensions; iAxis++) {
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if( Abs(vDirection(iAxis)) > Abs(tMaxAxis) ) {
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tMaxAxis = vDirection(iAxis);
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iMaxAxis = iAxis;
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}
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}
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/* This assert would seem natural here, but it is not possible because of parallel planes!
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// must be greater or equal than minimal max axis of any normalized vector in that space
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ASSERT( Abs(tMaxAxis) > (1.0/sqrt(double(iDimensions))-0.01) );
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*/
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// remember that axis index and sign for sorting
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bvc_iMaxAxis = iMaxAxis;
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bvc_tMaxAxisSign = Sgn(tMaxAxis);
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}
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/*
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* Unnitialize.
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*/
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template<class Type, int iDimensions>
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void BSPVertexContainer<Type, iDimensions>::Uninitialize(void)
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{
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// delete array of vertices
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bvc_aVertices.Delete();
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// destroy axis index and sign
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bvc_iMaxAxis = -1;
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bvc_tMaxAxisSign = (Type)0;
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}
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static INDEX qsort_iCompareAxis;
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template<class Type, int iDimensions>
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class CVertexComparator {
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public:
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/*
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* Compare two vertices.
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*/
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static inline int CompareVertices(const Vector<Type, iDimensions> &vx0, const Vector<Type, iDimensions> &vx1, INDEX iAxis)
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{
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if (vx0(iAxis)<vx1(iAxis)) return -1;
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else if (vx0(iAxis)>vx1(iAxis)) return 1;
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else return 0;
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}
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/*
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* Compare two vertices for quick-sort.
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*/
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static int qsort_CompareVertices_plus( const void *pvVertex0, const void *pvVertex1)
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{
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BSPVertex<Type, iDimensions> &vx0 = *(BSPVertex<Type, iDimensions> *)pvVertex0;
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BSPVertex<Type, iDimensions> &vx1 = *(BSPVertex<Type, iDimensions> *)pvVertex1;
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return +CompareVertices(vx0, vx1, qsort_iCompareAxis);
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}
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static int qsort_CompareVertices_minus( const void *pvVertex0, const void *pvVertex1)
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{
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BSPVertex<Type, iDimensions> &vx0 = *(BSPVertex<Type, iDimensions> *)pvVertex0;
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BSPVertex<Type, iDimensions> &vx1 = *(BSPVertex<Type, iDimensions> *)pvVertex1;
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return -CompareVertices(vx0, vx1, qsort_iCompareAxis);
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}
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};
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/*
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* Sort vertices in this container along the largest axis of container direction.
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*/
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template<class Type, int iDimensions>
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void BSPVertexContainer<Type, iDimensions>::Sort(void)
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{
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// if there are no vertices, or the container is not line
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if (bvc_aVertices.Count()==0 || IsPlannar()) {
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// do not attempt to sort
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return;
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}
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// sort by max. axis
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qsort_iCompareAxis = bvc_iMaxAxis;
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// if the sign of axis is positive
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if (bvc_tMaxAxisSign>0) {
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// sort them normally
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if (bvc_aVertices.Count()>0) {
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qsort(&bvc_aVertices[0], bvc_aVertices.Count(), sizeof(BSPVertex<Type, iDimensions>),
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CVertexComparator<Type, iDimensions>::qsort_CompareVertices_plus);
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}
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// if it is negative
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} else {
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// sort them inversely
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if (bvc_aVertices.Count()>0) {
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qsort(&bvc_aVertices[0], bvc_aVertices.Count(), sizeof(BSPVertex<Type, iDimensions>),
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CVertexComparator<Type, iDimensions>::qsort_CompareVertices_minus);
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}
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}
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}
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/*
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* Elliminate paired vertices.
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*/
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template<class Type, int iDimensions>
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void BSPVertexContainer<Type, iDimensions>::ElliminatePairedVertices(void)
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{
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// if there are no vertices, or the container is not line
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if (bvc_aVertices.Count()==0 || IsPlannar()) {
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// do not attempt to sort
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return;
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}
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// initially, last vertices are far away
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Type tLastInside; tLastInside = (Type)32000;
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BSPVertex<Type, iDimensions> *pbvxLastInside = NULL;
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// for all vertices in container
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for (INDEX iVertex=0; iVertex<bvc_aVertices.Count(); iVertex++) {
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BSPVertex<Type, iDimensions> &bvx = bvc_aVertices[iVertex]; // reference to this vertex
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Type t = bvx(bvc_iMaxAxis); // coordinate along max. axis
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// if last inside vertex is next to this one
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if ( EpsilonEq(t, tLastInside) ) {
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// last vertex is far away
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tLastInside = (Type)32000;
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IFDEBUG(pbvxLastInside = NULL);
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// otherwise
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} else {
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// make this last inside vertex
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tLastInside = t;
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pbvxLastInside = &bvx;
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}
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}
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}
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/*
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* Create edges from vertices in one container -- must be sorted before.
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*/
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template<class Type, int iDimensions>
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void BSPVertexContainer<Type, iDimensions>::CreateEdges(CDynamicArray<BSPEdge<Type, iDimensions> > &abed, size_t ulEdgeTag)
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{
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// if there are no vertices, or the container is not line
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if (bvc_aVertices.Count()==0 || IsPlannar()) {
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// do not attempt to sort
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return;
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}
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// initially, edge is inactive
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BOOL bActive = FALSE;
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BSPEdge<Type, iDimensions> *pbed = NULL;
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// for all vertices in container
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for (INDEX iVertex=0; iVertex<bvc_aVertices.Count(); iVertex++) {
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BSPVertex<Type, iDimensions> &bvx = bvc_aVertices[iVertex]; // reference to this vertex
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// if edge is inactive
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if (!bActive) {
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// create new edge
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pbed = abed.New();
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pbed->bed_ulEdgeTag = ulEdgeTag;
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// set start vertex
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pbed->bed_vVertex0 = bvx;
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} else {
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// set end vertex
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pbed->bed_vVertex1 = bvx;
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// trash edge pointer
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IFDEBUG(pbed = NULL);
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}
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// toggle edge
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bActive = !bActive;
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}
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}
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/////////////////////////////////////////////////////////////////////
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// BSP edge
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// remove all edges marked for removal
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template<class Type, int iDimensions>
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void BSPEdge<Type, iDimensions>::RemoveMarkedBSPEdges(CDynamicArray<BSPEdge<Type, iDimensions> > &abed)
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{
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typedef BSPEdge<Type, iDimensions> edge_t; // local declaration, to fix macro expansion in FOREACHINDYNAMICARRAY
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// conut edges left
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INDEX ctEdgesLeft = 0;
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{FOREACHINDYNAMICARRAY(abed, edge_t, itbed) {
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if (itbed->bed_ulEdgeTag != 0) {
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ctEdgesLeft++;
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}
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}}
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// make a copy of array without removed edges
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CDynamicArray<BSPEdge<Type, iDimensions> > abed2;
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abed2.New(ctEdgesLeft);
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abed2.Lock();
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INDEX iedNew = 0;
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{FOREACHINDYNAMICARRAY(abed, edge_t, itbed) {
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edge_t &bed = *itbed;
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if (bed.bed_ulEdgeTag != 0) {
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abed2[iedNew] = bed;
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iedNew++;
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}
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}}
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abed2.Unlock();
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// use that copy instead the original array
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abed.Clear();
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abed.MoveArray(abed2);
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}
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// optimize a polygon made out of BSP edges using tag information
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template<class Type, int iDimensions>
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void BSPEdge<Type, iDimensions>::OptimizeBSPEdges(CDynamicArray<BSPEdge<Type, iDimensions> > &abed)
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{
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typedef BSPEdge<Type, iDimensions> edge_t; // local declaration, to fix macro expansion in FOREACHINDYNAMICARRAY
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// if there are no edges
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if (abed.Count()==0) {
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// do nothing
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return;
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}
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BOOL bSomeJoined;
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// repeat
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do {
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bSomeJoined = FALSE;
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// for each edge
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{FOREACHINDYNAMICARRAY(abed, edge_t, itbed1) {
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edge_t &bed1 = *itbed1;
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// if it is already marked
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if (bed1.bed_ulEdgeTag == 0) {
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// skip it
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continue;
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}
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// if it is dummy edge
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if (bed1.bed_vVertex0==bed1.bed_vVertex1) {
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// mark it for removal
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bSomeJoined = TRUE;
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bed1.bed_ulEdgeTag = 0;
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// skip it
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continue;
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}
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// for each other edge
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{FOREACHINDYNAMICARRAY(abed, edge_t, itbed2) {
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edge_t &bed2 = *itbed2;
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if (&bed1==&bed2) {
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continue;
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}
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// if it is already marked
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if (bed2.bed_ulEdgeTag == 0) {
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// skip it
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continue;
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}
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// if they originate from same edge (plane)
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if (bed1.bed_ulEdgeTag == bed2.bed_ulEdgeTag) {
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// if they are complemented
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if (bed1.bed_vVertex0==bed2.bed_vVertex1 && bed1.bed_vVertex1==bed2.bed_vVertex0) {
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// marked them both
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bSomeJoined = TRUE;
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bed1.bed_ulEdgeTag = 0;
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bed2.bed_ulEdgeTag = 0;
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// skip them both
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break;
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}
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// if second one continues after first one
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if (bed1.bed_vVertex1==bed2.bed_vVertex0) {
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// extend end of first edge to the end of second one
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bed1.bed_vVertex1=bed2.bed_vVertex1;
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bSomeJoined = TRUE;
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// marked second edge
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bed2.bed_ulEdgeTag = 0;
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// if second one continues before first one
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} else if (bed1.bed_vVertex0==bed2.bed_vVertex1) {
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// extend start of first edge to the start of second one
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bed1.bed_vVertex0=bed2.bed_vVertex0;
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bSomeJoined = TRUE;
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// marked second edge
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bed2.bed_ulEdgeTag = 0;
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}
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}
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}}
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}}
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// while some edges can be joined
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} while(bSomeJoined);
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// remove all marked edges
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RemoveMarkedBSPEdges(abed);
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}
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/////////////////////////////////////////////////////////////////////
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// BSP polygon
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/*
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* Add an edge to the polygon.
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*/
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template<class Type, int iDimensions>
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inline void BSPPolygon<Type, iDimensions>::AddEdge(const Vector<Type, iDimensions> &vPoint0, const Vector<Type, iDimensions> &vPoint1, size_t ulTag)
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{
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*bpo_abedPolygonEdges.New() = BSPEdge<Type, iDimensions>(vPoint0, vPoint1, ulTag);
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}
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/////////////////////////////////////////////////////////////////////
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// BSP node
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/*
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* Recursive destructor.
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*/
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template<class Type, int iDimensions>
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void BSPNode<Type, iDimensions>::DeleteBSPNodeRecursively(void)
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{
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// delete sub-trees first, before deleting this node
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if (bn_pbnFront!=NULL) {
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bn_pbnFront->DeleteBSPNodeRecursively();
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}
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if (bn_pbnBack!=NULL) {
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bn_pbnBack->DeleteBSPNodeRecursively();
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}
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delete this;
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}
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/*
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* Constructor for a leaf node.
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*/
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template<class Type, int iDimensions>
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BSPNode<Type, iDimensions>::BSPNode(enum BSPNodeLocation bnl)
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: bn_bnlLocation(bnl)
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, bn_pbnFront(NULL)
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, bn_pbnBack(NULL)
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{
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ASSERT(bnl == BNL_INSIDE || bnl == BNL_OUTSIDE);
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}
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/*
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* Constructor for a branch node.
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*/
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template<class Type, int iDimensions>
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BSPNode<Type, iDimensions>::BSPNode(const Plane<Type, iDimensions> &plSplitPlane, size_t ulPlaneTag,
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BSPNode<Type, iDimensions> &bnFront, BSPNode<Type, iDimensions> &bnBack)
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: Plane<Type, iDimensions>(plSplitPlane)
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, bn_bnlLocation(BNL_BRANCH)
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, bn_pbnFront(&bnFront)
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, bn_pbnBack(&bnBack)
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, bn_ulPlaneTag(ulPlaneTag)
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{
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}
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/*
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* Constructor for cloning a bsp (sub)tree.
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*/
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template<class Type, int iDimensions>
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BSPNode<Type, iDimensions>::BSPNode(BSPNode<Type, iDimensions> &bnRoot)
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: Plane<Type, iDimensions>(bnRoot) // copy the plane
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, bn_bnlLocation(bnRoot.bn_bnlLocation) // copy the location
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, bn_ulPlaneTag(bnRoot.bn_ulPlaneTag) // copy the plane tag
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{
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// if this has a front child
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if (bnRoot.bn_pbnFront != NULL) {
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// clone front sub tree
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bn_pbnFront = new BSPNode<Type, iDimensions>(*bnRoot.bn_pbnFront);
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// otherwise
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} else {
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// no front sub tree
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bn_pbnFront = NULL;
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}
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// if this has a back child
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if (bnRoot.bn_pbnBack != NULL) {
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// clone back sub tree
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bn_pbnBack = new BSPNode<Type, iDimensions>(*bnRoot.bn_pbnBack);
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// otherwise
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} else {
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// no back sub tree
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bn_pbnBack = NULL;
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}
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}
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/* Test if a sphere is inside, outside, or intersecting. (Just a trivial rejection test) */
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template<class Type, int iDimensions>
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FLOAT BSPNode<Type, iDimensions>::TestSphere(const Vector<Type, iDimensions> &vSphereCenter, Type tSphereRadius) const
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{
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// if this is an inside node
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if (bn_bnlLocation == BNL_INSIDE) {
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// it is inside
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return 1;
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// if this is an outside node
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} else if (bn_bnlLocation == BNL_OUTSIDE) {
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// it is outside
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return -1;
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// if this is a branch
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} else {
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ASSERT(bn_bnlLocation == BNL_BRANCH);
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// test the sphere against the split plane
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Type tCenterDistance = this->PointDistance(vSphereCenter);
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// if the sphere is in front of the plane
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if (tCenterDistance > +tSphereRadius) {
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// recurse down the front node
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return bn_pbnFront->TestSphere(vSphereCenter, tSphereRadius);
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// if the sphere is behind the plane
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} else if (tCenterDistance < -tSphereRadius) {
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// recurse down the back node
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return bn_pbnBack->TestSphere(vSphereCenter, tSphereRadius);
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// if the sphere is split by the plane
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} else {
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// if front node touches
|
|
FLOAT fFront = bn_pbnFront->TestSphere(vSphereCenter, tSphereRadius);
|
|
if (fFront==0) {
|
|
// it touches
|
|
return 0;
|
|
}
|
|
// if back node touches
|
|
FLOAT fBack = bn_pbnBack->TestSphere(vSphereCenter, tSphereRadius);
|
|
if (fBack==0) {
|
|
// it touches
|
|
return 0;
|
|
}
|
|
// if front and back have same classification
|
|
if (fFront==fBack) {
|
|
// return it
|
|
return fFront;
|
|
// if front and back have different classification
|
|
} else {
|
|
// it touches
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Test if a box is inside, outside, or intersecting. (Just a trivial rejection test) */
|
|
template<class Type, int iDimensions>
|
|
FLOAT BSPNode<Type, iDimensions>::TestBox(const OBBox<Type> &box) const
|
|
{
|
|
// if this is an inside node
|
|
if (bn_bnlLocation == BNL_INSIDE) {
|
|
// it is inside
|
|
return 1;
|
|
// if this is an outside node
|
|
} else if (bn_bnlLocation == BNL_OUTSIDE) {
|
|
// it is outside
|
|
return -1;
|
|
// if this is a branch
|
|
} else {
|
|
ASSERT(bn_bnlLocation == BNL_BRANCH);
|
|
// test the box against the split plane
|
|
Type tTest = box.TestAgainstPlane(*this);
|
|
// if the sphere is in front of the plane
|
|
if (tTest>0) {
|
|
// recurse down the front node
|
|
return bn_pbnFront->TestBox(box);
|
|
// if the sphere is behind the plane
|
|
} else if (tTest<0) {
|
|
// recurse down the back node
|
|
return bn_pbnBack->TestBox(box);
|
|
// if the sphere is split by the plane
|
|
} else {
|
|
// if front node touches
|
|
FLOAT fFront = bn_pbnFront->TestBox(box);
|
|
if (fFront==0) {
|
|
// it touches
|
|
return 0;
|
|
}
|
|
// if back node touches
|
|
FLOAT fBack = bn_pbnBack->TestBox(box);
|
|
if (fBack==0) {
|
|
// it touches
|
|
return 0;
|
|
}
|
|
// if front and back have same classification
|
|
if (fFront==fBack) {
|
|
// return it
|
|
return fFront;
|
|
// if front and back have different classification
|
|
} else {
|
|
// it touches
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// find minimum/maximum parameters of points on a line that are inside - recursive
|
|
template<class Type, int iDimensions>
|
|
void BSPNode<Type, iDimensions>::FindLineMinMax(
|
|
BSPLine<Type, iDimensions> &bl,
|
|
const Vector<Type, iDimensions> &v0,
|
|
const Vector<Type, iDimensions> &v1,
|
|
Type t0, Type t1)
|
|
{
|
|
// if this is an inside node
|
|
if (bn_bnlLocation == BNL_INSIDE) {
|
|
// just update min/max
|
|
bl.bl_tMin = Min(bl.bl_tMin, t0);
|
|
bl.bl_tMax = Max(bl.bl_tMax, t1);
|
|
return;
|
|
// if this is an outside node
|
|
} else if (bn_bnlLocation == BNL_OUTSIDE) {
|
|
// do nothing
|
|
return;
|
|
// if this is a branch
|
|
} else {
|
|
ASSERT(bn_bnlLocation == BNL_BRANCH);
|
|
// test the points against the split plane
|
|
Type tD0 = this->PointDistance(v0);
|
|
Type tD1 = this->PointDistance(v1);
|
|
// if both are front
|
|
if (tD0>=0 && tD1>=0) {
|
|
// recurse down the front node
|
|
bn_pbnFront->FindLineMinMax(bl, v0, v1, t0, t1);
|
|
return;
|
|
// if both are back
|
|
} else if (tD0<0 && tD1<0) {
|
|
// recurse down the back node
|
|
bn_pbnBack->FindLineMinMax(bl, v0, v1, t0, t1);
|
|
return;
|
|
// if on different sides
|
|
} else {
|
|
// find split point
|
|
Type tFraction = tD0/(tD0-tD1);
|
|
Vector<Type, iDimensions> vS = v0+(v1-v0)*tFraction;
|
|
Type tS = t0+(t1-t0)*tFraction;
|
|
// if first is front
|
|
if (tD0>=0) {
|
|
// recurse first part down the front node
|
|
bn_pbnFront->FindLineMinMax(bl, v0, vS, t0, tS);
|
|
// recurse second part down the back node
|
|
bn_pbnBack->FindLineMinMax(bl, vS, v1, tS, t1);
|
|
return;
|
|
// if first is back
|
|
} else {
|
|
// recurse first part down the back node
|
|
bn_pbnBack->FindLineMinMax(bl, v0, vS, t0, tS);
|
|
// recurse second part down the front node
|
|
bn_pbnFront->FindLineMinMax(bl, vS, v1, tS, t1);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////
|
|
// BSP cutter
|
|
|
|
/*
|
|
* Constructor for splitting a polygon with a BSP tree.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
BSPCutter<Type, iDimensions>::BSPCutter(BSPPolygon<Type, iDimensions> &bpoPolygon, BSPNode<Type, iDimensions> &bnRoot)
|
|
{
|
|
// cut the polygon with entire tree
|
|
CutPolygon(bpoPolygon, bnRoot);
|
|
}
|
|
|
|
/*
|
|
* Destructor.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
BSPCutter<Type, iDimensions>::~BSPCutter(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Cut a polygon with a BSP tree.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
void BSPCutter<Type, iDimensions>::CutPolygon(BSPPolygon<Type, iDimensions> &bpoPolygon, BSPNode<Type, iDimensions> &bn)
|
|
{
|
|
// if the polygon has no edges
|
|
if (bpoPolygon.bpo_abedPolygonEdges.Count()==0) {
|
|
// skip cutting
|
|
return;
|
|
}
|
|
|
|
// if this node is inside node
|
|
if (bn.bn_bnlLocation == BNL_INSIDE) {
|
|
// add entire polygon to inside part
|
|
bc_abedInside.MoveArray(bpoPolygon.bpo_abedPolygonEdges);
|
|
|
|
// if this node is outside node
|
|
} else if (bn.bn_bnlLocation == BNL_OUTSIDE) {
|
|
// add entire polygon to outside part
|
|
bc_abedOutside.MoveArray(bpoPolygon.bpo_abedPolygonEdges);
|
|
|
|
// if this node is a branch
|
|
} else if (bn.bn_bnlLocation == BNL_BRANCH) {
|
|
BSPPolygon<Type, iDimensions> bpoFront; // part of polygon in front of this splitter
|
|
BSPPolygon<Type, iDimensions> bpoBack; // part of polygon behind this splitter
|
|
|
|
// split the polygon with split plane of this node
|
|
BOOL bOnPlane = SplitPolygon(bpoPolygon, (Plane<Type, iDimensions> &)bn, bn.bn_ulPlaneTag, bpoFront, bpoBack);
|
|
|
|
// if the polygon is not on the split plane
|
|
if (!bOnPlane) {
|
|
// recursively split front part with front part of bsp
|
|
CutPolygon(bpoFront, *bn.bn_pbnFront);
|
|
// recursively split back part with back part of bsp
|
|
CutPolygon(bpoBack, *bn.bn_pbnBack);
|
|
|
|
// if the polygon is on the split plane
|
|
} else {
|
|
BSPNode<Type, iDimensions> *pbnFront; // front node (relative to the polygon orientation)
|
|
BSPNode<Type, iDimensions> *pbnBack; // back node (relative to the polygon orientation)
|
|
|
|
// check the direction of the polygon with the front direction of the split plane
|
|
Type tDirection = (Vector<Type, iDimensions> &)bpoPolygon%(Vector<Type, iDimensions> &)bn;
|
|
// if the directions are same
|
|
if (tDirection > +BSP_EPSILON) {
|
|
// make nodes relative to polygon same as relative to the split plane
|
|
pbnFront = bn.bn_pbnFront;
|
|
pbnBack = bn.bn_pbnBack;
|
|
|
|
// if the directions are opposite
|
|
} else if (tDirection < -BSP_EPSILON) {
|
|
// make nodes relative to polygon opposite as relative to the split plane
|
|
pbnFront = bn.bn_pbnBack;
|
|
pbnBack = bn.bn_pbnFront;
|
|
// if the directions are indeterminate
|
|
} else {
|
|
// that must not be
|
|
ASSERT(FALSE);
|
|
}
|
|
|
|
// cut it with front part of bsp
|
|
BSPCutter<Type, iDimensions> bcFront(bpoPolygon, *pbnFront);
|
|
// there must be no on-border parts
|
|
ASSERT(bcFront.bc_abedBorderInside.Count()==0 && bcFront.bc_abedBorderOutside.Count()==0);
|
|
|
|
// make a polygon from parts that are inside in front part of BSP
|
|
BSPPolygon<Type, iDimensions> bpoInsideFront((Plane<Type, iDimensions> &)bpoPolygon, bcFront.bc_abedInside, bpoPolygon.bpo_ulPlaneTag);
|
|
// cut them with back part of bsp
|
|
BSPCutter<Type, iDimensions> bcBackInsideFront(bpoInsideFront, *pbnBack);
|
|
|
|
// make a polygon from parts that are outside in front part of BSP
|
|
BSPPolygon<Type, iDimensions> bpoOutsideFront((Plane<Type, iDimensions> &)bpoPolygon, bcFront.bc_abedOutside, bpoPolygon.bpo_ulPlaneTag);
|
|
// cut them with back part of bsp
|
|
BSPCutter<Type, iDimensions> bcBackOutsideFront(bpoOutsideFront, *pbnBack);
|
|
|
|
// add parts that are inside both in front and back to inside part
|
|
bc_abedInside.MoveArray(bcBackInsideFront.bc_abedInside);
|
|
// add parts that are outside both in front and back to outside part
|
|
bc_abedOutside.MoveArray(bcBackOutsideFront.bc_abedOutside);
|
|
|
|
// add parts that are inside in front and outside back to on-border-inside-part
|
|
bc_abedBorderInside.MoveArray(bcBackInsideFront.bc_abedOutside);
|
|
// add parts that are outside in front and inside back to on-border-outside-part
|
|
bc_abedBorderOutside.MoveArray(bcBackOutsideFront.bc_abedInside);
|
|
}
|
|
} else {
|
|
ASSERTALWAYS("Bad node type");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Split a polygon with a plane.
|
|
* -- returns FALSE if polygon is laying on the plane
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
BOOL BSPCutter<Type, iDimensions>::SplitPolygon(BSPPolygon<Type, iDimensions> &bpoPolygon, const Plane<Type, iDimensions> &plSplitPlane, size_t ulPlaneTag,
|
|
BSPPolygon<Type, iDimensions> &bpoFront, BSPPolygon<Type, iDimensions> &bpoBack)
|
|
{
|
|
(Plane<Type, iDimensions> &)bpoFront = (Plane<Type, iDimensions> &)bpoPolygon;
|
|
bpoFront.bpo_ulPlaneTag = bpoPolygon.bpo_ulPlaneTag;
|
|
(Plane<Type, iDimensions> &)bpoBack = (Plane<Type, iDimensions> &)bpoPolygon;
|
|
bpoBack.bpo_ulPlaneTag = bpoPolygon.bpo_ulPlaneTag;
|
|
|
|
// calculate the direction of split line
|
|
Vector<Type, iDimensions> vSplitDirection = ((Vector<Type, iDimensions> &)plSplitPlane) * (Vector<Type, iDimensions> &)bpoPolygon;
|
|
|
|
// if the polygon is parallel with the split plane
|
|
if (vSplitDirection.Length() < +BSP_EPSILON) {
|
|
// calculate the distance of the polygon from the split plane
|
|
Type fDistance = plSplitPlane.PlaneDistance(bpoPolygon);
|
|
|
|
// if the polygon is in front of plane
|
|
if (fDistance > +BSP_EPSILON) {
|
|
// move all edges to front array
|
|
bpoFront.bpo_abedPolygonEdges.MoveArray(bpoPolygon.bpo_abedPolygonEdges);
|
|
// the polygon is not on the plane
|
|
return FALSE;
|
|
|
|
// if the polygon is behind the plane
|
|
} else if (fDistance < -BSP_EPSILON) {
|
|
// move all edges to back array
|
|
bpoBack.bpo_abedPolygonEdges.MoveArray(bpoPolygon.bpo_abedPolygonEdges);
|
|
// the polygon is not on the plane
|
|
return FALSE;
|
|
|
|
// if the polygon is on the plane
|
|
} else {
|
|
// just return so
|
|
return TRUE;
|
|
}
|
|
|
|
// if the polygon is not parallel with the split plane
|
|
} else {
|
|
// initialize front and back vertex containers
|
|
BSPVertexContainer<Type, iDimensions> bvcFront, bvcBack;
|
|
bvcFront.Initialize(vSplitDirection);
|
|
bvcBack.Initialize(-vSplitDirection);
|
|
|
|
typedef BSPEdge<Type, iDimensions> edge_t; // local declaration, to fix macro expansion in FOREACHINDYNAMICARRAY
|
|
// for each edge in polygon
|
|
{FOREACHINDYNAMICARRAY(bpoPolygon.bpo_abedPolygonEdges, edge_t, itbed) {
|
|
// split the edge
|
|
SplitEdge(itbed->bed_vVertex0, itbed->bed_vVertex1, itbed->bed_ulEdgeTag, plSplitPlane,
|
|
bpoFront, bpoBack, bvcFront, bvcBack);
|
|
}}
|
|
|
|
// sort vertex containers
|
|
bvcFront.Sort();
|
|
bvcBack.Sort();
|
|
// elliminate paired vertices
|
|
bvcFront.ElliminatePairedVertices();
|
|
bvcBack.ElliminatePairedVertices();
|
|
// create more front polygon edges from front vertex container
|
|
bvcFront.CreateEdges(bpoFront.bpo_abedPolygonEdges, ulPlaneTag);
|
|
// create more back polygon edges from back vertex container
|
|
bvcBack.CreateEdges(bpoBack.bpo_abedPolygonEdges, ulPlaneTag);
|
|
|
|
// the polygon is not on the plane
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Split an edge with a plane.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
void BSPCutter<Type, iDimensions>::SplitEdge(const Vector<Type, iDimensions> &vPoint0, const Vector<Type, iDimensions> &vPoint1, size_t ulEdgeTag,
|
|
const Plane<Type, iDimensions> &plSplitPlane,
|
|
BSPPolygon<Type, iDimensions> &bpoFront, BSPPolygon<Type, iDimensions> &bpoBack,
|
|
BSPVertexContainer<Type, iDimensions> &bvcFront, BSPVertexContainer<Type, iDimensions> &bvcBack)
|
|
{
|
|
|
|
// calculate point distances from clip plane
|
|
Type tDistance0 = plSplitPlane.PointDistance(vPoint0);
|
|
Type tDistance1 = plSplitPlane.PointDistance(vPoint1);
|
|
|
|
/* ---- first point behind plane ---- */
|
|
if (tDistance0 < -BSP_EPSILON) {
|
|
|
|
// if both are back
|
|
if (tDistance1 < -BSP_EPSILON) {
|
|
// add the whole edge to back node
|
|
bpoBack.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// no split points
|
|
|
|
// if first is back, second front
|
|
} else if (tDistance1 > +BSP_EPSILON) {
|
|
// calculate intersection coordinates
|
|
Vector<Type, iDimensions> vPointMid = vPoint0-(vPoint0-vPoint1)*tDistance0/(tDistance0-tDistance1);
|
|
// add front part to front node
|
|
bpoFront.AddEdge(vPointMid, vPoint1, ulEdgeTag);
|
|
// add back part to back node
|
|
bpoBack.AddEdge(vPoint0, vPointMid, ulEdgeTag);
|
|
// add split point to front _and_ back part of splitter
|
|
bvcFront.AddVertex(vPointMid);
|
|
bvcBack.AddVertex(vPointMid);
|
|
|
|
// if first is back, second on the plane
|
|
} else {
|
|
// add the whole edge to back node
|
|
bpoBack.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// add second point to back part of splitter
|
|
bvcBack.AddVertex(vPoint1);
|
|
}
|
|
|
|
/* ---- first point in front of plane ---- */
|
|
} else if (tDistance0 > +BSP_EPSILON) {
|
|
// if first is front, second back
|
|
if (tDistance1 < -BSP_EPSILON) {
|
|
// calculate intersection coordinates
|
|
Vector<Type, iDimensions> vPointMid = vPoint1-(vPoint1-vPoint0)*tDistance1/(tDistance1-tDistance0);
|
|
// add front part to front node
|
|
bpoFront.AddEdge(vPoint0, vPointMid, ulEdgeTag);
|
|
// add back part to back node
|
|
bpoBack.AddEdge(vPointMid, vPoint1, ulEdgeTag);
|
|
// add split point to front _and_ back part of splitter
|
|
bvcFront.AddVertex(vPointMid);
|
|
bvcBack.AddVertex(vPointMid);
|
|
|
|
|
|
// if both are front
|
|
} else if (tDistance1 > +BSP_EPSILON) {
|
|
// add the whole edge to front node
|
|
bpoFront.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// no split points
|
|
|
|
// if first is front, second on the plane
|
|
} else {
|
|
// add the whole edge to front node
|
|
bpoFront.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// add second point to front part of splitter
|
|
bvcFront.AddVertex(vPoint1);
|
|
}
|
|
|
|
/* ---- first point on the plane ---- */
|
|
} else {
|
|
// if first is on the plane, second back
|
|
if (tDistance1 < -BSP_EPSILON) {
|
|
// add the whole edge to back node
|
|
bpoBack.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// add first point to back part of splitter
|
|
bvcBack.AddVertex(vPoint0);
|
|
|
|
// if first is on the plane, second in front of the plane
|
|
} else if (tDistance1 > +BSP_EPSILON) {
|
|
// add the whole edge to front node
|
|
bpoFront.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// add first point to front part of splitter
|
|
bvcFront.AddVertex(vPoint0);
|
|
|
|
// if both are on the plane
|
|
} else {
|
|
// check the direction of the edge with the front direction of the splitter
|
|
Type tDirection = (vPoint1-vPoint0)%bvcFront.bvc_vDirection;
|
|
// if the directions are same
|
|
if (tDirection > +BSP_EPSILON) {
|
|
// add the whole edge to front node
|
|
bpoFront.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// add both points to front part of the splitter
|
|
bvcFront.AddVertex(vPoint0);
|
|
bvcFront.AddVertex(vPoint1);
|
|
|
|
|
|
// if the directions are opposite
|
|
} else if (tDirection < -BSP_EPSILON) {
|
|
// add the whole edge to back node
|
|
bpoBack.AddEdge(vPoint0, vPoint1, ulEdgeTag);
|
|
// add both points to back part of the splitter
|
|
bvcBack.AddVertex(vPoint0);
|
|
bvcBack.AddVertex(vPoint1);
|
|
|
|
|
|
// if the directions are indeterminate
|
|
} else {
|
|
// that must mean that there is no edge in fact
|
|
//ASSERT(Type(vPoint1-vPoint0) < 2*BSP_EPSILON); //!!!!
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////
|
|
// BSP tree
|
|
|
|
/*
|
|
* Default constructor.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
BSPTree<Type, iDimensions>::BSPTree(void)
|
|
{
|
|
bt_pbnRoot = NULL;
|
|
}
|
|
|
|
/*
|
|
* Destructor.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
BSPTree<Type, iDimensions>::~BSPTree(void)
|
|
{
|
|
Destroy();
|
|
}
|
|
|
|
/*
|
|
* Constructor with array of polygons oriented inwards.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
BSPTree<Type, iDimensions>::BSPTree(CDynamicArray<BSPPolygon<Type, iDimensions> > &abpoPolygons)
|
|
{
|
|
bt_pbnRoot = NULL;
|
|
Create(abpoPolygons);
|
|
}
|
|
|
|
/*
|
|
* Create bsp-subtree from array of polygons oriented inwards.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
BSPNode<Type, iDimensions> *BSPTree<Type, iDimensions>::CreateSubTree(CDynamicArray<BSPPolygon<Type, iDimensions> > &abpoPolygons)
|
|
{
|
|
// local declarations, to fix macro expansion in FOREACHINDYNAMICARRAY
|
|
typedef BSPPolygon<Type, iDimensions> polygon_t;
|
|
ASSERT(abpoPolygons.Count()>=1);
|
|
|
|
// use first polygon as splitter
|
|
abpoPolygons.Lock();
|
|
BSPPolygon<Type, iDimensions> bpoSplitter = abpoPolygons[0];
|
|
abpoPolygons.Unlock();
|
|
// tags must be valid
|
|
ASSERT(bpoSplitter.bpo_ulPlaneTag!=-1);
|
|
|
|
// create two new polygon arrays - back and front
|
|
CDynamicArray<BSPPolygon<Type, iDimensions> > abpoFront, abpoBack;
|
|
|
|
// for each polygon in this array
|
|
{FOREACHINDYNAMICARRAY(abpoPolygons, polygon_t, itbpo) {
|
|
BSPPolygon<Type, iDimensions> bpoFront, bpoBack;
|
|
|
|
// tags must be valid
|
|
ASSERT(itbpo->bpo_ulPlaneTag!=-1);
|
|
// if the polygon has plane tag same as the tag of the splitter
|
|
if (itbpo->bpo_ulPlaneTag == bpoSplitter.bpo_ulPlaneTag) {
|
|
// they are assumed coplanar, so skip it
|
|
continue;
|
|
}
|
|
|
|
// split it by the plane of splitter polygon
|
|
BOOL bOnPlane = BSPCutter<Type, iDimensions>::SplitPolygon(itbpo.Current(),
|
|
bpoSplitter, bpoSplitter.bpo_ulPlaneTag, bpoFront, bpoBack);
|
|
|
|
// if the polygon is not coplanar with the splitter
|
|
if (!bOnPlane) {
|
|
|
|
// if there are some parts that are front
|
|
if (bpoFront.bpo_abedPolygonEdges.Count()>0) {
|
|
// create a polygon in front array and add all inside parts to it
|
|
BSPPolygon<Type, iDimensions> *pbpo = abpoFront.New(1);
|
|
pbpo->bpo_abedPolygonEdges.MoveArray(bpoFront.bpo_abedPolygonEdges);
|
|
*(Plane<Type, iDimensions> *)pbpo = itbpo.Current();
|
|
pbpo->bpo_ulPlaneTag = itbpo->bpo_ulPlaneTag;
|
|
}
|
|
// if there are some parts that are back
|
|
if (bpoBack.bpo_abedPolygonEdges.Count()>0) {
|
|
// create a polygon in back array and add all outside parts to it
|
|
BSPPolygon<Type, iDimensions> *pbpo = abpoBack.New(1);
|
|
pbpo->bpo_abedPolygonEdges.MoveArray(bpoBack.bpo_abedPolygonEdges);
|
|
*(Plane<Type, iDimensions> *)pbpo = itbpo.Current();
|
|
pbpo->bpo_ulPlaneTag = itbpo->bpo_ulPlaneTag;
|
|
}
|
|
}
|
|
}}
|
|
|
|
// free this array (to not consume too much memory)
|
|
abpoPolygons.Clear();
|
|
|
|
BSPNode<Type, iDimensions> *pbnFront, *pbnBack;
|
|
// if there is some polygon in front array
|
|
if (abpoFront.Count()>0) {
|
|
// create front subtree using front array
|
|
pbnFront = CreateSubTree(abpoFront);
|
|
// otherwise
|
|
} else {
|
|
// make front node an inside leaf node
|
|
pbnFront = new BSPNode<Type, iDimensions>(BNL_INSIDE);
|
|
}
|
|
|
|
// if there is some polygon in back array
|
|
if (abpoBack.Count()>0) {
|
|
// create back subtree using back array
|
|
pbnBack = CreateSubTree(abpoBack);
|
|
// otherwise
|
|
} else {
|
|
// make back node an outside leaf node
|
|
pbnBack = new BSPNode<Type, iDimensions>(BNL_OUTSIDE);
|
|
}
|
|
|
|
// make a splitter node with the front and back nodes
|
|
return new BSPNode<Type, iDimensions>(bpoSplitter, bpoSplitter.bpo_ulPlaneTag, *pbnFront, *pbnBack);
|
|
}
|
|
|
|
/*
|
|
* Create bsp-tree from array of polygons oriented inwards.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
void BSPTree<Type, iDimensions>::Create(CDynamicArray<BSPPolygon<Type, iDimensions> > &abpoPolygons)
|
|
{
|
|
// free eventual existing tree
|
|
Destroy();
|
|
|
|
// create the tree using the recursive function
|
|
bt_pbnRoot = CreateSubTree(abpoPolygons);
|
|
// move the tree to array
|
|
MoveNodesToArray();
|
|
}
|
|
|
|
/*
|
|
* Destroy bsp-tree.
|
|
*/
|
|
template<class Type, int iDimensions>
|
|
void BSPTree<Type, iDimensions>::Destroy(void)
|
|
{
|
|
// if tree is in array
|
|
if (bt_abnNodes.Count()>0) {
|
|
// clear array
|
|
bt_abnNodes.Clear();
|
|
bt_pbnRoot = NULL;
|
|
// if there is some free tree
|
|
} else if (bt_pbnRoot != NULL) {
|
|
// delete it
|
|
bt_pbnRoot->DeleteBSPNodeRecursively();
|
|
bt_pbnRoot = NULL;
|
|
}
|
|
}
|
|
|
|
/* Test if a sphere could touch any of inside nodes. (Just a trivial rejection test) */
|
|
template<class Type, int iDimensions>
|
|
FLOAT BSPTree<Type, iDimensions>::TestSphere(const Vector<Type, iDimensions> &vSphereCenter, Type tSphereRadius) const
|
|
{
|
|
if (bt_pbnRoot==NULL) return FALSE;
|
|
// just start recursive testing at root node
|
|
return bt_pbnRoot->TestSphere(vSphereCenter, tSphereRadius);
|
|
}
|
|
/* Test if a box is inside, outside, or intersecting. (Just a trivial rejection test) */
|
|
template<class Type, int iDimensions>
|
|
FLOAT BSPTree<Type, iDimensions>::TestBox(const OBBox<Type> &box) const
|
|
{
|
|
if (bt_pbnRoot==NULL) return FALSE;
|
|
// just start recursive testing at root node
|
|
return bt_pbnRoot->TestBox(box);
|
|
}
|
|
|
|
// find minimum/maximum parameters of points on a line that are inside
|
|
template<class Type, int iDimensions>
|
|
void BSPTree<Type, iDimensions>::FindLineMinMax(
|
|
const Vector<Type, iDimensions> &v0,
|
|
const Vector<Type, iDimensions> &v1,
|
|
Type &tMin,
|
|
Type &tMax) const
|
|
{
|
|
// init line
|
|
BSPLine<Type, iDimensions> bl;
|
|
bl.bl_tMin = UpperLimit(Type(0));
|
|
bl.bl_tMax = LowerLimit(Type(0));
|
|
|
|
// recursively split it
|
|
bt_pbnRoot->FindLineMinMax(bl, v0, v1, Type(0), Type(1));
|
|
|
|
// return the min/max
|
|
tMin = bl.bl_tMin;
|
|
tMax = bl.bl_tMax;
|
|
}
|
|
|
|
static INDEX _ctNextIndex;
|
|
/* Move one subtree to array. */
|
|
template<class Type, int iDimensions>
|
|
void BSPTree<Type, iDimensions>::MoveSubTreeToArray(BSPNode<Type, iDimensions> *pbnSubtree)
|
|
{
|
|
// if this is no node
|
|
if (pbnSubtree==NULL) {
|
|
// do nothing
|
|
return;
|
|
}
|
|
// first move all subnodes
|
|
MoveSubTreeToArray(pbnSubtree->bn_pbnFront);
|
|
MoveSubTreeToArray(pbnSubtree->bn_pbnBack);
|
|
|
|
// get the node in array
|
|
BSPNode<Type, iDimensions> &bnInArray = bt_abnNodes[_ctNextIndex];
|
|
_ctNextIndex--;
|
|
|
|
// copy properties to the array node
|
|
(Plane<Type, iDimensions>&)bnInArray = (Plane<Type, iDimensions>&)*pbnSubtree;
|
|
bnInArray.bn_bnlLocation = pbnSubtree->bn_bnlLocation;
|
|
bnInArray.bn_ulPlaneTag = pbnSubtree->bn_ulPlaneTag;
|
|
// let plane tag hold pointer to node in array
|
|
pbnSubtree->bn_ulPlaneTag = (size_t)&bnInArray;
|
|
|
|
// remap pointers to subnodes
|
|
if (pbnSubtree->bn_pbnFront==NULL) {
|
|
bnInArray.bn_pbnFront = NULL;
|
|
} else {
|
|
bnInArray.bn_pbnFront = (BSPNode<Type, iDimensions>*)pbnSubtree->bn_pbnFront->bn_ulPlaneTag;
|
|
}
|
|
if (pbnSubtree->bn_pbnBack==NULL) {
|
|
bnInArray.bn_pbnBack = NULL;
|
|
} else {
|
|
bnInArray.bn_pbnBack = (BSPNode<Type, iDimensions>*)pbnSubtree->bn_pbnBack->bn_ulPlaneTag;
|
|
}
|
|
}
|
|
|
|
/* Count nodes in subtree. */
|
|
template<class Type, int iDimensions>
|
|
INDEX BSPTree<Type, iDimensions>::CountNodes(BSPNode<Type, iDimensions> *pbnSubtree)
|
|
{
|
|
if (pbnSubtree==NULL) {
|
|
return 0;
|
|
} else {
|
|
return 1+
|
|
CountNodes(pbnSubtree->bn_pbnFront)+
|
|
CountNodes(pbnSubtree->bn_pbnBack);
|
|
}
|
|
}
|
|
|
|
/* Move all nodes to array. */
|
|
template<class Type, int iDimensions>
|
|
void BSPTree<Type, iDimensions>::MoveNodesToArray(void)
|
|
{
|
|
// if there is no tree
|
|
if (bt_pbnRoot == NULL) {
|
|
// do nothing
|
|
return;
|
|
}
|
|
|
|
// count nodes
|
|
INDEX ctNodes = CountNodes(bt_pbnRoot);
|
|
// allocate large enough array
|
|
bt_abnNodes.New(ctNodes);
|
|
// start at the end of array
|
|
_ctNextIndex = ctNodes-1;
|
|
// recusively remap all nodes
|
|
MoveSubTreeToArray(bt_pbnRoot);
|
|
|
|
// delete the old nodes
|
|
bt_pbnRoot->DeleteBSPNodeRecursively();
|
|
|
|
// first node is always at start of array
|
|
bt_pbnRoot = &bt_abnNodes[0];
|
|
}
|
|
|
|
/* Read/write entire bsp tree to disk. */
|
|
template<class Type, int iDimensions>
|
|
void BSPTree<Type, iDimensions>::Read_t(CTStream &strm) // throw char *
|
|
{
|
|
// free eventual existing tree
|
|
Destroy();
|
|
|
|
// read current version and size
|
|
INDEX iVersion;
|
|
SLONG slSize;
|
|
strm>>iVersion>>slSize;
|
|
ASSERT(iVersion==1);
|
|
|
|
// read count of nodes and create array
|
|
INDEX ctNodes;
|
|
strm>>ctNodes;
|
|
// This assert was less silly when it was basically sizeof (*this), but to serialize this across targets, it looks different now. --ryan.
|
|
ASSERT(slSize==(SLONG)(sizeof(INDEX)+ctNodes*((sizeof(Type)*(iDimensions+1))+16)));
|
|
bt_abnNodes.New(ctNodes);
|
|
// for each node
|
|
for(INDEX iNode=0; iNode<ctNodes; iNode++) {
|
|
BSPNode<Type, iDimensions> &bn = bt_abnNodes[iNode];
|
|
// read it from disk
|
|
//strm.Read_t(&(Plane<Type, iDimensions>&)bn, sizeof(Plane<Type, iDimensions>));
|
|
strm >> ((Plane<Type, iDimensions>&)bn);
|
|
|
|
strm>>(INDEX&)bn.bn_bnlLocation;
|
|
|
|
INDEX iFront;
|
|
strm>>iFront;
|
|
if (iFront==-1) {
|
|
bn.bn_pbnFront=NULL;
|
|
} else {
|
|
bn.bn_pbnFront = &bt_abnNodes[iFront];
|
|
}
|
|
|
|
INDEX iBack;
|
|
strm>>iBack;
|
|
if (iBack==-1) {
|
|
bn.bn_pbnBack=NULL;
|
|
} else {
|
|
bn.bn_pbnBack = &bt_abnNodes[iBack];
|
|
}
|
|
ULONG ul;
|
|
strm>>ul;
|
|
bn.bn_ulPlaneTag = ul;
|
|
}
|
|
|
|
// check end id
|
|
strm.ExpectID_t("BSPE"); // bsp end
|
|
|
|
// first node is always at start of array
|
|
if (bt_abnNodes.Count()>0) {
|
|
bt_pbnRoot = &bt_abnNodes[0];
|
|
} else {
|
|
bt_pbnRoot = NULL;
|
|
}
|
|
}
|
|
|
|
template<class Type, int iDimensions>
|
|
void BSPTree<Type, iDimensions>::Write_t(CTStream &strm) // throw char *
|
|
{
|
|
INDEX ctNodes = bt_abnNodes.Count();
|
|
|
|
// calculate size of chunk to write
|
|
SLONG slSize = sizeof(INDEX)+ctNodes*sizeof(BSPNode<Type, iDimensions>);
|
|
// write current version and size
|
|
strm<<INDEX(1)<<slSize;
|
|
|
|
// write count of nodes
|
|
strm<<ctNodes;
|
|
// for each node
|
|
for(INDEX iNode=0; iNode<ctNodes; iNode++) {
|
|
BSPNode<Type, iDimensions> &bn = bt_abnNodes[iNode];
|
|
// write it to disk
|
|
//strm.Write_t(&(Plane<Type, iDimensions>&)bn, sizeof(Plane<Type, iDimensions>));
|
|
strm << ((Plane<Type, iDimensions>&)bn);
|
|
strm<<(INDEX&)bn.bn_bnlLocation;
|
|
|
|
INDEX iFront;
|
|
if (bn.bn_pbnFront==NULL) {
|
|
iFront=-1;
|
|
} else {
|
|
iFront = bt_abnNodes.Index(bn.bn_pbnFront);
|
|
}
|
|
strm<<iFront;
|
|
|
|
INDEX iBack;
|
|
if (bn.bn_pbnBack==NULL) {
|
|
iBack=-1;
|
|
} else {
|
|
iBack = bt_abnNodes.Index(bn.bn_pbnBack);
|
|
}
|
|
strm<<iBack;
|
|
|
|
strm<<IntPtrToID(bn.bn_ulPlaneTag);
|
|
}
|
|
// write end id for checking
|
|
strm.WriteID_t("BSPE"); // bsp end
|
|
}
|
|
|
|
// instantiate template classes implemented here for needed types
|
|
#pragma warning (disable: 4660) // if already instantiated by some class
|
|
|
|
// remove templates
|
|
template class BSPVertex<DOUBLE, 3>; //DOUBLEbspvertex3D;
|
|
template class BSPVertexContainer<DOUBLE, 3>;
|
|
template class BSPEdge<DOUBLE, 3>;
|
|
template class BSPNode<DOUBLE, 3>;
|
|
template class BSPPolygon<DOUBLE, 3>;
|
|
template class BSPTree<DOUBLE, 3>;
|
|
template class BSPCutter<DOUBLE, 3>;
|
|
|
|
template class BSPVertex<FLOAT, 3>;
|
|
template class BSPVertexContainer<FLOAT, 3>;
|
|
template class BSPEdge<FLOAT, 3>;
|
|
template class BSPNode<FLOAT, 3>;
|
|
template class BSPPolygon<FLOAT, 3>;
|
|
template class BSPTree<FLOAT, 3>;
|
|
template class BSPCutter<FLOAT, 3>;
|
|
|
|
#pragma warning (default: 4660)
|
|
|