[2746] | 1 | #include <queue>
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| 2 | #include <stack>
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| 3 | #include <fstream>
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| 4 | #include <iostream>
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| 5 | #include <iomanip>
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| 6 |
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[2755] | 7 | #include "Bvh.h"
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| 8 | #include "Camera.h"
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| 9 | #include "Plane3.h"
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| 10 | #include "glInterface.h"
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| 11 | #include "Triangle3.h"
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[2756] | 12 | #include "SceneEntity.h"
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| 13 | #include "Geometry.h"
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[2773] | 14 | #include "RenderState.h"
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[2825] | 15 | #include "Material.h"
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[2795] | 16 | #include "gzstream.h"
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[2751] | 17 |
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[2773] | 18 |
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[2776] | 19 | namespace CHCDemoEngine
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[2751] | 20 | {
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| 21 |
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[2746] | 22 | #define INVALID_TEST ((unsigned int)-1)
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| 23 |
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| 24 | using namespace std;
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| 25 |
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| 26 |
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[2895] | 27 | int BvhNode::sCurrentState = 0;
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[2746] | 28 |
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[2895] | 29 |
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[2746] | 30 | /*
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| 31 | 3 x---------x 2
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| 32 | |\ \
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| 33 | | \ \
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| 34 | | \ \
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| 35 | | 4 x---------x 5
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| 36 | | | |
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| 37 | 0 x | x 1 |
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| 38 | \ | |
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| 39 | \ | |
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| 40 | \| |
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| 41 | 7 x---------x 6
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| 42 | */
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| 43 |
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| 44 | static unsigned int sIndices[] =
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| 45 | {7, // degenerated
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| 46 | 7, 6, 4, 5, 3, 2, 0, 1,
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| 47 | 1, 4, // degenerated
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| 48 | 4, 3, 7, 0, 6, 1, 5, 2,
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| 49 | 2 // degenerated
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| 50 | };
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| 51 |
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| 52 |
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| 53 | const static int sNumIndicesPerBox = 20;
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| 54 |
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| 55 | /* Order of vertices
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| 56 | 0 = (0, 0, 0)
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| 57 | 1 = (1, 0, 0)
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| 58 | 2 = (1, 1, 0)
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| 59 | 3 = (0, 1, 0)
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| 60 | 4 = (0, 1, 1)
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| 61 | 5 = (1, 1, 1)
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| 62 | 6 = (1, 0, 1)
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| 63 | 7 = (0, 0, 1)
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| 64 | */
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| 65 |
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[2755] | 66 | static Plane3 sNearPlane;
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[2911] | 67 | static Frustum sFrustum;
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[2746] | 68 |
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[2755] | 69 | /// these values are valid for all nodes
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| 70 | static int sClipPlaneAABBVertexIndices[12];
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| 71 |
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| 72 |
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[2795] | 73 | #define ALIGN_INDICES
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| 74 |
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[2746] | 75 | BvhNode::BvhNode(BvhNode *parent):
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| 76 | mParent(parent),
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| 77 | mAxis(-1),
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| 78 | mDepth(0),
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| 79 | mFirst(-1),
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| 80 | mLast(-1),
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| 81 | mNumTestNodes(1),
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| 82 | mTestNodesIdx(-1),
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[2755] | 83 | mIndicesPtr(-1),
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[2761] | 84 | mId(0),
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| 85 | mIsMaxDepthForVirtualLeaf(false),
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| 86 | mIsVirtualLeaf(false)
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[2746] | 87 | {
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[2895] | 88 | for (int i = 0; i < NUM_STATES; ++ i)
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| 89 | {
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| 90 | mPlaneMask[i] = 0;
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| 91 | mPreferredPlane[i]= 0;
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[2897] | 92 | mLastRenderedFrame[i] = -1;
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[2895] | 93 | }
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[2746] | 94 | }
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| 95 |
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| 96 |
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[2761] | 97 | BvhNode::~BvhNode()
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| 98 | {
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| 99 | }
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| 100 |
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| 101 |
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[2746] | 102 | void BvhNode::ResetVisibility()
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| 103 | {
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[2895] | 104 | for (int i = 0; i < NUM_STATES; ++ i)
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| 105 | {
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| 106 | mVisibility[i].Reset();
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[2897] | 107 | mLastRenderedFrame[i] = -1;
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| 108 | mPlaneMask[i] = 0;
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| 109 | mPreferredPlane[i]= 0;
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[2895] | 110 | }
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[2746] | 111 | }
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| 112 |
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| 113 |
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| 114 | void BvhNode::VisibilityInfo::Reset()
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| 115 | {
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| 116 | mIsVisible = false;
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[2770] | 117 | mAssumedVisibleFrameId = 0;
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[2746] | 118 | mLastVisitedFrame = -1;
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| 119 | mTimesInvisible = 0;
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| 120 | mIsFrustumCulled = false;
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| 121 | mIsNew = true;
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[2800] | 122 | mLastQueriedFrame = -1;
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[2746] | 123 | }
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| 124 |
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| 125 |
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[2792] | 126 | BvhInterior::~BvhInterior()
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| 127 | {
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| 128 | DEL_PTR(mBack);
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| 129 | DEL_PTR(mFront);
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| 130 | }
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| 131 |
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| 132 |
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[2746] | 133 | BvhLeaf::~BvhLeaf()
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| 134 | {
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| 135 | }
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| 136 |
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| 137 |
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| 138 | /***********************************************************/
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| 139 | /* class Bvh implementation */
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| 140 | /***********************************************************/
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| 141 |
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| 142 |
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[2773] | 143 | Bvh::Bvh()
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| 144 | {
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| 145 | Init();
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| 146 | }
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[2746] | 147 |
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[2760] | 148 |
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[2773] | 149 | Bvh::Bvh(const SceneEntityContainer &entities)
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[2746] | 150 | {
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[2773] | 151 | Init();
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| 152 |
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[2760] | 153 | mGeometrySize = entities.size();
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| 154 | mGeometry = new SceneEntity*[mGeometrySize];
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[2796] | 155 |
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[2760] | 156 | SceneEntityContainer::const_iterator it, it_end = entities.end();
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[2746] | 157 |
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[2760] | 158 | int i = 0;
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| 159 | for (it = entities.begin(); it != it_end; ++ it, ++ i)
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[2746] | 160 | {
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[2760] | 161 | mGeometry[i] = (*it);
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[2746] | 162 | }
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[2760] | 163 | }
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[2746] | 164 |
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| 165 |
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| 166 | Bvh::~Bvh()
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| 167 | {
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[2792] | 168 | if (mVertices) delete [] mVertices;
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[2746] | 169 | if (mIndices) delete [] mIndices;
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| 170 | if (mTestIndices) delete [] mTestIndices;
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| 171 | if (mGeometry) delete [] mGeometry;
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| 172 |
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| 173 | if (mRoot) delete mRoot;
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[2792] | 174 |
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| 175 | // delete vbo
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| 176 | glDeleteBuffersARB(1, &mVboId);
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[2746] | 177 | }
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| 178 |
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| 179 |
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[2773] | 180 | void Bvh::Init()
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| 181 | {
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| 182 | mRoot = NULL;
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| 183 | mVertices = NULL;
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| 184 | mIndices = NULL;
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| 185 | mTestIndices = NULL;
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| 186 | mCurrentIndicesPtr = 0;
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| 187 | mNumNodes = 0;
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[2795] | 188 |
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| 189 | mMaxDepthForTestingChildren = 3;
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| 190 | //mMaxDepthForTestingChildren = 4;
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| 191 | mAreaRatioThreshold = 2.0f;
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| 192 | //mAreaRatioThreshold = 1.4f;
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| 193 |
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[2773] | 194 | mVboId = -1;
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| 195 | }
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| 196 |
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| 197 |
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[2746] | 198 | void Bvh::PullUpLastVisited(BvhNode *node, const int frameId) const
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| 199 | {
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| 200 | BvhNode *parent = node->GetParent();
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| 201 |
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| 202 | while (parent && (parent->GetLastVisitedFrame() != frameId))
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| 203 | {
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| 204 | parent->SetLastVisitedFrame(frameId);
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| 205 | parent = parent->GetParent();
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| 206 | }
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| 207 | }
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| 208 |
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| 209 |
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| 210 | void Bvh::MakeParentsVisible(BvhNode *node)
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| 211 | {
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| 212 | BvhNode *parent = node->GetParent();
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| 213 |
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| 214 | while (parent && (!parent->IsVisible()))
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| 215 | {
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| 216 | parent->SetVisible(true);
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| 217 | parent = parent->GetParent();
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| 218 | }
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| 219 | }
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| 220 |
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| 221 |
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| 222 | void Bvh::CollectLeaves(BvhNode *node, BvhLeafContainer &leaves)
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| 223 | {
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| 224 | stack<BvhNode *> tStack;
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| 225 | tStack.push(node);
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| 226 |
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| 227 | while (!tStack.empty())
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| 228 | {
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| 229 | BvhNode *node = tStack.top();
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| 230 |
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| 231 | tStack.pop();
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| 232 |
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| 233 | if (!node->IsLeaf())
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| 234 | {
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| 235 | BvhInterior *interior = static_cast<BvhInterior *>(node);
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| 236 |
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| 237 | tStack.push(interior->mFront);
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| 238 | tStack.push(interior->mBack);
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| 239 | }
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| 240 | else
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| 241 | {
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| 242 | leaves.push_back(static_cast<BvhLeaf *>(node));
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| 243 | }
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| 244 | }
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| 245 | }
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| 246 |
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| 247 |
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| 248 | void Bvh::CollectNodes(BvhNode *node, BvhNodeContainer &nodes)
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| 249 | {
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| 250 | stack<BvhNode *> tStack;
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| 251 |
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| 252 | tStack.push(node);
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| 253 |
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| 254 | while (!tStack.empty())
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| 255 | {
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| 256 | BvhNode *node = tStack.top();
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| 257 | tStack.pop();
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| 258 |
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| 259 | nodes.push_back(node);
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| 260 |
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| 261 | if (!node->IsLeaf())
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| 262 | {
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| 263 | BvhInterior *interior = static_cast<BvhInterior *>(node);
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| 264 |
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| 265 | tStack.push(interior->mFront);
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| 266 | tStack.push(interior->mBack);
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| 267 | }
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| 268 | }
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| 269 | }
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| 270 |
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| 271 |
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| 272 | typedef pair<BvhNode *, int> tPair;
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| 273 |
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[2755] | 274 | void Bvh::CollectNodes(BvhNode *root, BvhNodeContainer &nodes, int depth)
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[2746] | 275 | {
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| 276 | stack<tPair> tStack;
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| 277 | tStack.push(tPair(root, 0));
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| 278 |
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| 279 | while (!tStack.empty())
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| 280 | {
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| 281 | BvhNode *node = tStack.top().first;
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| 282 | const int d = tStack.top().second;
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| 283 |
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| 284 | tStack.pop();
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| 285 |
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| 286 | // found depth => take this node
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[2755] | 287 | if ((d == depth) || (node->IsLeaf()))
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[2746] | 288 | {
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| 289 | nodes.push_back(node);
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| 290 | }
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[2755] | 291 | else
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[2951] | 292 | {
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[2746] | 293 | BvhInterior *interior = static_cast<BvhInterior *>(node);
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| 294 |
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| 295 | tStack.push(tPair(interior->mFront, d + 1));
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| 296 | tStack.push(tPair(interior->mBack, d + 1));
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| 297 | }
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| 298 | }
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| 299 | }
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| 300 |
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| 301 |
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[2951] | 302 | SceneEntity **Bvh::GetGeometry(BvhNode *node, int &geometrySize) const
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[2746] | 303 | {
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| 304 | geometrySize = node->CountPrimitives();
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| 305 | return mGeometry + node->mFirst;
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| 306 | }
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| 307 |
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| 308 |
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[2762] | 309 | bool Bvh::TestPlane(BvhNode *node, int i, bool &bIntersect)
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| 310 | {
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| 311 | // do the test only if necessary
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[2895] | 312 | if (!(node->mPlaneMask[BvhNode::sCurrentState] & (1 << i)))
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[2763] | 313 | return true;
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| 314 |
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| 315 | ////////
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| 316 | //-- test the n-vertex
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| 317 |
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| 318 | if ((node->mBox.GetDistance(sClipPlaneAABBVertexIndices[i * 2 + 0], sFrustum.mClipPlanes[i]) > 0.0f))
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| 319 | {
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| 320 | // outside
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[2895] | 321 | node->mPreferredPlane[BvhNode::sCurrentState] = i;
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[2763] | 322 | return false;
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[2762] | 323 | }
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| 324 |
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[2763] | 325 | ////////////
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| 326 | //-- test the p-vertex
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| 327 |
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| 328 | if (node->mBox.GetDistance(sClipPlaneAABBVertexIndices[i * 2 + 1], sFrustum.mClipPlanes[i]) <= 0.0f)
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| 329 | {
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| 330 | // completely inside: children don't need to check against this plane no more
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[2895] | 331 | node->mPlaneMask[BvhNode::sCurrentState] ^= 1 << i;
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[2763] | 332 | }
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| 333 | else
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| 334 | {
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| 335 | bIntersect = true;
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| 336 | }
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| 337 |
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[2762] | 338 | return true;
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| 339 | }
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| 340 |
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| 341 |
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[2755] | 342 | int Bvh::IsWithinViewFrustum(BvhNode *node)
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[2746] | 343 | {
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| 344 | bool bIntersect = false;
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| 345 |
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| 346 | if (node->GetParent())
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[2895] | 347 | node->mPlaneMask[BvhNode::sCurrentState] = node->GetParent()->mPlaneMask[BvhNode::sCurrentState];
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[2746] | 348 |
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| 349 | ////////
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[2762] | 350 | //-- apply frustum culling for the planes [mPreferredPlane - 5]
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[2763] | 351 |
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[2895] | 352 | for (int i = node->mPreferredPlane[BvhNode::sCurrentState]; i < 6; ++ i)
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[2762] | 353 | if (!TestPlane(node, i, bIntersect)) return 0;
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[2763] | 354 |
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[2895] | 355 |
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[2746] | 356 | //////////
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| 357 | //-- do the view frustum culling for the planes [0 - m_iPreferredPlane)
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| 358 |
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[2895] | 359 | for (int i = 0; i < node->mPreferredPlane[BvhNode::sCurrentState]; ++ i)
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[2762] | 360 | if (!TestPlane(node, i, bIntersect)) return 0;
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[2763] | 361 |
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[2746] | 362 | return bIntersect ? -1 : 1;
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| 363 | }
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| 364 |
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| 365 |
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[2911] | 366 | static void CalcNPVertexIndices(const Frustum &frustum, int *indices)
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| 367 | {
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| 368 | for (int i = 0; i < 6; ++ i)
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| 369 | {
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| 370 | // n-vertex
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| 371 | indices[i * 2 + 0] = AxisAlignedBox3::GetIndexNearestVertex(frustum.mClipPlanes[i].mNormal);
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| 372 | // p-vertex
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| 373 | indices[i * 2 + 1] = AxisAlignedBox3::GetIndexFarthestVertex(frustum.mClipPlanes[i].mNormal);
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| 374 | }
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| 375 | }
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| 376 |
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| 377 |
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[2897] | 378 | void Bvh::InitFrame(Camera *cam)
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[2746] | 379 | {
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| 380 | // = 0011 1111 which means that at the beginning, all six planes have to frustum culled
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[2895] | 381 | mRoot->mPlaneMask[BvhNode::sCurrentState] = 0x3f;
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[2746] | 382 |
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[2897] | 383 | cam->CalcFrustum(sFrustum);
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[2911] | 384 | CalcNPVertexIndices(sFrustum, sClipPlaneAABBVertexIndices);
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[2746] | 385 |
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[2763] | 386 | // store near plane
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[2897] | 387 | sNearPlane = Plane3(cam->GetDirection(), cam->GetPosition());
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[2746] | 388 | }
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| 389 |
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| 390 |
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[2954] | 391 | void Bvh::UpdateDistance(BvhNode *node) const
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[2746] | 392 | {
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[2954] | 393 | //node->mDistance = node->GetBox()GetMinDistance(sNearPlane);
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| 394 | node->mDistance = sNearPlane.Distance(node->GetBox().Center());
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[2746] | 395 | }
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| 396 |
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| 397 |
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[2947] | 398 | float Bvh::CalcMaxDistance(BvhNode *node) const
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| 399 | {
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| 400 | return node->GetBox().GetMaxDistance(sNearPlane);
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[2951] | 401 |
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| 402 | float maxDist = .0f;
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| 403 |
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| 404 | int geometrySize;
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| 405 | SceneEntity **entities = GetGeometry(node, geometrySize);
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| 406 |
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| 407 | for (int i = 0; i < geometrySize; ++ i)
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| 408 | {
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| 409 | SceneEntity *ent = entities[i];
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| 410 | float dist = ent->GetTransformedBoundingBox().GetMaxDistance(sNearPlane);
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| 411 |
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| 412 | if (dist > maxDist) maxDist = dist;
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| 413 | }
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| 414 |
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| 415 | return maxDist;
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[2947] | 416 | }
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| 417 |
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| 418 |
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[2786] | 419 | void Bvh::RenderBounds(BvhNode *node, RenderState *state, bool useTightBounds)
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[2746] | 420 | {
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[2786] | 421 | // if not using tight bounds, rendering boxes in immediate mode
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| 422 | // is preferable to vertex arrays (less setup time)
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| 423 | if (!useTightBounds)
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| 424 | {
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| 425 | RenderBoundingBoxImmediate(node->GetBox());
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| 426 | }
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| 427 | else
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| 428 | {
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[2963] | 429 | // hack: use dummy wrapper in order to use function
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[2786] | 430 | static BvhNodeContainer dummy(1);
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| 431 | dummy[0] = node;
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| 432 | RenderBounds(dummy, state, useTightBounds);
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| 433 | }
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[2746] | 434 | }
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| 435 |
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| 436 |
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[2786] | 437 | int Bvh::RenderBounds(const BvhNodeContainer &nodes,
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| 438 | RenderState *state,
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| 439 | bool useTightBounds)
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[2746] | 440 | {
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[2786] | 441 | // if not using tight bounds, rendering boxes in immediate mode
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| 442 | // is preferable to vertex arrays (less setup time)
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[2746] | 443 |
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[2786] | 444 | int renderedBoxes;
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| 445 |
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| 446 | if (!useTightBounds)
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| 447 | {
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| 448 | BvhNodeContainer::const_iterator nit, nit_end = nodes.end();
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| 449 |
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| 450 | for (nit = nodes.begin(); nit != nit_end; ++ nit)
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| 451 | {
|
---|
| 452 | RenderBoundingBoxImmediate((*nit)->GetBox());
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | renderedBoxes = (int)nodes.size();
|
---|
| 456 | }
|
---|
| 457 | else
|
---|
| 458 | {
|
---|
| 459 | renderedBoxes = PrepareBoundsWithDrawArrays(nodes);
|
---|
| 460 | RenderBoundsWithDrawArrays(renderedBoxes, state);
|
---|
| 461 | }
|
---|
| 462 |
|
---|
[2746] | 463 | return renderedBoxes;
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 |
|
---|
[2786] | 467 | int Bvh::PrepareBoundsWithDrawArrays(const BvhNodeContainer &nodes)
|
---|
[2746] | 468 | {
|
---|
| 469 | //////
|
---|
| 470 | //-- for the first time we come here ...
|
---|
| 471 |
|
---|
| 472 | if (!mIndices)
|
---|
| 473 | { // create list of indices
|
---|
| 474 | CreateIndices();
|
---|
| 475 | }
|
---|
| 476 |
|
---|
[2773] | 477 | if (mVboId == -1)
|
---|
[2746] | 478 | {
|
---|
| 479 | // prepare the vbo
|
---|
| 480 | PrepareVertices();
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | ///////////////
|
---|
| 484 |
|
---|
| 485 | int numNodes = 0;
|
---|
| 486 |
|
---|
| 487 | BvhNodeContainer::const_iterator nit, nit_end = nodes.end();
|
---|
| 488 |
|
---|
| 489 | for (nit = nodes.begin(); nit != nit_end; ++ nit)
|
---|
| 490 | {
|
---|
| 491 | BvhNode *node = *nit;
|
---|
| 492 |
|
---|
| 493 | const int numIndices = node->mNumTestNodes * sNumIndicesPerBox;
|
---|
| 494 |
|
---|
| 495 | // copy indices
|
---|
| 496 | memcpy(mIndices + numNodes * sNumIndicesPerBox,
|
---|
| 497 | mTestIndices + node->mIndicesPtr,
|
---|
| 498 | numIndices * sizeof(unsigned int));
|
---|
[2795] | 499 |
|
---|
[2746] | 500 | numNodes += node->mNumTestNodes;
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | return numNodes;
|
---|
| 504 | }
|
---|
| 505 |
|
---|
| 506 |
|
---|
[2786] | 507 | void Bvh::RenderBoundsWithDrawArrays(int numNodes, RenderState *state)
|
---|
[2746] | 508 | {
|
---|
| 509 | //////
|
---|
| 510 | //-- Rendering the vbo
|
---|
[2773] | 511 |
|
---|
| 512 | if (state->GetCurrentVboId() != mVboId)
|
---|
| 513 | {
|
---|
| 514 | glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVboId);
|
---|
[2746] | 515 | // set the vertex pointer to the vertex buffer
|
---|
[2773] | 516 | glVertexPointer(3, GL_FLOAT, 0, (char *)NULL);
|
---|
[2746] | 517 |
|
---|
[2773] | 518 | state->SetCurrentVboId(mVboId);
|
---|
| 519 | }
|
---|
[2746] | 520 |
|
---|
[2773] | 521 | // we do use the last or the first index (they are generate and only used to connect strips)
|
---|
| 522 | int numElements = numNodes * sNumIndicesPerBox - 1;
|
---|
[2746] | 523 | // don't render first degenerate index
|
---|
| 524 | glDrawElements(GL_TRIANGLE_STRIP, numElements, GL_UNSIGNED_INT, mIndices + 1);
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 |
|
---|
| 528 | void Bvh::CreateIndices()
|
---|
| 529 | {
|
---|
| 530 | // collect bvh nodes
|
---|
| 531 | BvhNodeContainer nodes;
|
---|
| 532 | CollectNodes(mRoot, nodes);
|
---|
| 533 |
|
---|
[2755] | 534 | cout << "creating new indices" << endl;
|
---|
[2746] | 535 |
|
---|
| 536 | int numMaxIndices = 0;
|
---|
| 537 |
|
---|
| 538 | BvhNodeContainer::const_iterator lit, lit_end = nodes.end();
|
---|
| 539 |
|
---|
| 540 | for (lit = nodes.begin(); lit != lit_end; ++ lit)
|
---|
| 541 | {
|
---|
| 542 | int offset = (*lit)->mNumTestNodes * sNumIndicesPerBox;
|
---|
[2795] | 543 | #ifdef ALIGN_INDICES
|
---|
[2746] | 544 | // align with 32
|
---|
| 545 | offset = (offset / 32) * 32 + 32;
|
---|
| 546 | #endif
|
---|
| 547 | numMaxIndices += offset;
|
---|
| 548 | }
|
---|
| 549 |
|
---|
| 550 |
|
---|
[2755] | 551 | cout << "creating global indices buffer" << endl;
|
---|
[2746] | 552 |
|
---|
| 553 | if (mIndices) delete [] mIndices;
|
---|
| 554 | if (mTestIndices) delete [] mTestIndices;
|
---|
| 555 |
|
---|
| 556 | // global buffer: create it once so we don't have
|
---|
| 557 | // to allocate memory from the chunks of the node
|
---|
| 558 | mIndices = new unsigned int[numMaxIndices];
|
---|
| 559 |
|
---|
| 560 | // create new index buffer for the individual nodes
|
---|
| 561 | mTestIndices = new unsigned int[numMaxIndices];
|
---|
| 562 |
|
---|
| 563 | mCurrentIndicesPtr = 0;
|
---|
| 564 |
|
---|
| 565 | for (lit = nodes.begin(); lit != lit_end; ++ lit)
|
---|
| 566 | {
|
---|
| 567 | BvhNode *node = *lit;
|
---|
| 568 |
|
---|
| 569 | // resize array
|
---|
| 570 | node->mIndicesPtr = mCurrentIndicesPtr;
|
---|
| 571 |
|
---|
| 572 | int numIndices = 0;
|
---|
| 573 |
|
---|
| 574 | // the bounding box of the test nodes are rendered instead of the root node
|
---|
| 575 | // => store their indices
|
---|
| 576 | for (int i = 0; i < node->mNumTestNodes; ++ i, numIndices += sNumIndicesPerBox)
|
---|
| 577 | {
|
---|
[2755] | 578 | BvhNode *testNode = mTestNodes[node->mTestNodesIdx + i];
|
---|
[2746] | 579 |
|
---|
| 580 | // add indices to root node
|
---|
| 581 | for (int j = 0; j < sNumIndicesPerBox; ++ j)
|
---|
| 582 | {
|
---|
| 583 | mTestIndices[mCurrentIndicesPtr + numIndices + j] = sIndices[j] + testNode->GetId() * 8;
|
---|
| 584 | }
|
---|
| 585 | }
|
---|
| 586 |
|
---|
| 587 | // align with 32
|
---|
[2795] | 588 | #ifdef ALIGN_INDICES
|
---|
[2746] | 589 | const int offset = (numIndices / 32) * 32 + 32;
|
---|
| 590 | #else
|
---|
| 591 | const int offset = numIndices;
|
---|
| 592 | #endif
|
---|
| 593 | mCurrentIndicesPtr += offset;
|
---|
| 594 | }
|
---|
| 595 | }
|
---|
| 596 |
|
---|
| 597 |
|
---|
| 598 | void Bvh::ComputeIds()
|
---|
| 599 | {
|
---|
[2756] | 600 | // collect all nodes
|
---|
[2755] | 601 | BvhNodeContainer nodes;
|
---|
[2756] | 602 | CollectNodes(mRoot, nodes);
|
---|
[2746] | 603 |
|
---|
| 604 | // assign ids to all nodes of the "regular" hierarchy
|
---|
| 605 | int i = 0;
|
---|
[2756] | 606 | BvhNodeContainer::const_iterator lit, lit_end = nodes.end();
|
---|
[2746] | 607 |
|
---|
| 608 | for (lit = nodes.begin(); lit != lit_end; ++ lit, ++ i)
|
---|
| 609 | {
|
---|
| 610 | (*lit)->SetId(i);
|
---|
| 611 | }
|
---|
| 612 | }
|
---|
| 613 |
|
---|
[2756] | 614 |
|
---|
[2746] | 615 | void Bvh::PrepareVertices()
|
---|
| 616 | {
|
---|
[2755] | 617 | // collect all nodes
|
---|
| 618 | BvhNodeContainer nodes;
|
---|
[2746] | 619 |
|
---|
| 620 | nodes.reserve(GetNumNodes());
|
---|
[2755] | 621 | CollectNodes(mRoot, nodes);
|
---|
[2746] | 622 |
|
---|
| 623 | const unsigned int bufferSize = 8 * (int)nodes.size();
|
---|
[2755] | 624 | mVertices = new Vector3[bufferSize];
|
---|
[2746] | 625 |
|
---|
| 626 | int i = 0;
|
---|
| 627 |
|
---|
| 628 | // store bounding box vertices
|
---|
[2755] | 629 | BvhNodeContainer::const_iterator lit, lit_end = nodes.end();
|
---|
[2746] | 630 |
|
---|
| 631 | for (lit = nodes.begin(); lit != lit_end; ++ lit, i += 8)
|
---|
| 632 | {
|
---|
[2755] | 633 | BvhNode *node = *lit;
|
---|
[2746] | 634 |
|
---|
| 635 | for (int j = 0; j < 8; ++ j)
|
---|
[2755] | 636 | ((Vector3 *)mVertices)[node->GetId() * 8 + j] = node->GetBox().GetVertex(j);
|
---|
[2746] | 637 | }
|
---|
| 638 |
|
---|
[2773] | 639 | glGenBuffersARB(1, &mVboId);
|
---|
| 640 | glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVboId);
|
---|
| 641 | glVertexPointer(3, GL_FLOAT, 0, (char *)NULL);
|
---|
[2746] | 642 |
|
---|
[2773] | 643 | glBufferDataARB(GL_ARRAY_BUFFER_ARB,
|
---|
| 644 | bufferSize * sizeof(Vector3),
|
---|
| 645 | mVertices,
|
---|
| 646 | GL_STATIC_DRAW_ARB);
|
---|
[2746] | 647 |
|
---|
[2800] | 648 | glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
|
---|
[2746] | 649 |
|
---|
[2773] | 650 | // data handled by graphics driver from now on
|
---|
| 651 | DEL_PTR(mVertices);
|
---|
[2746] | 652 |
|
---|
[2773] | 653 | cout << "***** created vbos for tighter bounds *********" << endl;
|
---|
[2746] | 654 | }
|
---|
| 655 |
|
---|
| 656 |
|
---|
[2755] | 657 | void Bvh::SetMaxDepthForTestingChildren(int maxDepth)
|
---|
[2746] | 658 | {
|
---|
| 659 | if (maxDepth != mMaxDepthForTestingChildren)
|
---|
| 660 | {
|
---|
| 661 | mMaxDepthForTestingChildren = maxDepth;
|
---|
| 662 | RecomputeBounds();
|
---|
| 663 | }
|
---|
| 664 | }
|
---|
| 665 |
|
---|
| 666 |
|
---|
[2755] | 667 | void Bvh::SetAreaRatioThresholdForTestingChildren(float ratio)
|
---|
[2746] | 668 | {
|
---|
| 669 | if (ratio != mAreaRatioThreshold)
|
---|
| 670 | {
|
---|
| 671 | mAreaRatioThreshold = ratio;
|
---|
| 672 | RecomputeBounds();
|
---|
| 673 | }
|
---|
| 674 | }
|
---|
| 675 |
|
---|
| 676 |
|
---|
| 677 | void Bvh::RecomputeBounds()
|
---|
| 678 | {
|
---|
| 679 | // collect all nodes
|
---|
| 680 | BvhNodeContainer nodes;
|
---|
| 681 | CollectNodes(mRoot, nodes);
|
---|
| 682 |
|
---|
[2755] | 683 | cout << "recomputing bounds, children will be tested in depth " << mMaxDepthForTestingChildren << endl;
|
---|
[2746] | 684 |
|
---|
| 685 | int success = 0;
|
---|
| 686 | BvhNodeContainer::const_iterator lit, lit_end = nodes.end();
|
---|
| 687 |
|
---|
| 688 | for (lit = nodes.begin(); lit != lit_end; ++ lit)
|
---|
| 689 | {
|
---|
| 690 | BvhNode *node = *lit;
|
---|
| 691 |
|
---|
[2795] | 692 | // recreate list of nodes that will be queried as a proxy
|
---|
[2755] | 693 | if (CreateNodeRenderList(node))
|
---|
| 694 | ++ success;
|
---|
[2746] | 695 | }
|
---|
| 696 |
|
---|
[2755] | 697 | float p = 100.0f * (float)success / nodes.size();
|
---|
| 698 | cout << "created tighter bounds for " << p << " percent of the nodes" << endl;
|
---|
[2746] | 699 |
|
---|
| 700 | // recreate indices used for indirect mode rendering
|
---|
[2894] | 701 | if (mIndices) CreateIndices();
|
---|
[2746] | 702 | }
|
---|
| 703 |
|
---|
| 704 |
|
---|
| 705 | bool Bvh::CreateNodeRenderList(BvhNode *node)
|
---|
| 706 | {
|
---|
[2755] | 707 | BvhNodeContainer children;
|
---|
[2746] | 708 |
|
---|
[2755] | 709 | // collect nodes that will be tested instead of the leaf node
|
---|
| 710 | // in order to get a tighter bounding box test
|
---|
| 711 | CollectNodes(node, children, mMaxDepthForTestingChildren);
|
---|
| 712 |
|
---|
[2746] | 713 |
|
---|
| 714 | // using the tighter bounds is not feasable in case
|
---|
| 715 | // that the tighter bounds represent nearly the same projected area
|
---|
| 716 | // as the old bounding box. Find this out using either volume or area
|
---|
| 717 | // heuristics
|
---|
| 718 |
|
---|
| 719 | float vol = 0;
|
---|
| 720 | float area = 0;
|
---|
| 721 |
|
---|
[2755] | 722 | BvhNodeContainer::const_iterator cit;
|
---|
[2746] | 723 |
|
---|
| 724 | for (cit = children.begin(); cit != children.end(); ++ cit)
|
---|
[2755] | 725 | area += (*cit)->GetBox().SurfaceArea();
|
---|
[2746] | 726 |
|
---|
[2755] | 727 | const float areaRatio = area / node->GetBox().SurfaceArea();
|
---|
[2746] | 728 |
|
---|
| 729 | bool success;
|
---|
| 730 |
|
---|
[2755] | 731 | if (areaRatio < mAreaRatioThreshold)
|
---|
[2746] | 732 | success = true;
|
---|
| 733 | else
|
---|
| 734 | {
|
---|
| 735 | // hack: only store node itself
|
---|
| 736 | children.clear();
|
---|
| 737 | children.push_back(node);
|
---|
| 738 |
|
---|
| 739 | success = false;
|
---|
| 740 | }
|
---|
| 741 |
|
---|
| 742 | // the new test nodes are added at the end of the vector
|
---|
[2755] | 743 | node->mTestNodesIdx = (int)mTestNodes.size();
|
---|
[2746] | 744 |
|
---|
| 745 | // use the found nodes as nodes during the occlusion tests
|
---|
| 746 | for (cit = children.begin(); cit != children.end(); ++ cit)
|
---|
| 747 | {
|
---|
[2755] | 748 | BvhNode *child = *cit;
|
---|
[2746] | 749 | mTestNodes.push_back(child);
|
---|
| 750 | }
|
---|
| 751 |
|
---|
| 752 | node->mNumTestNodes = (int)children.size();
|
---|
| 753 |
|
---|
| 754 | return success;
|
---|
| 755 | }
|
---|
| 756 |
|
---|
| 757 |
|
---|
| 758 | void Bvh::ResetNodeClassifications()
|
---|
| 759 | {
|
---|
| 760 | BvhNodeContainer nodes;
|
---|
| 761 |
|
---|
| 762 | nodes.reserve(GetNumNodes());
|
---|
| 763 | CollectNodes(mRoot, nodes);
|
---|
| 764 |
|
---|
| 765 | BvhNodeContainer::const_iterator lit, lit_end = nodes.end();
|
---|
| 766 |
|
---|
| 767 | for (lit = nodes.begin(); lit != lit_end; ++ lit)
|
---|
| 768 | {
|
---|
| 769 | (*lit)->ResetVisibility();
|
---|
| 770 | }
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 |
|
---|
| 774 | void Bvh::ComputeBvhStats()
|
---|
| 775 | {
|
---|
| 776 | std::stack<BvhNode *> nodeStack;
|
---|
| 777 | nodeStack.push(mRoot);
|
---|
| 778 |
|
---|
[2786] | 779 | int numVirtualLeaves = 0;
|
---|
| 780 |
|
---|
[2746] | 781 | while (!nodeStack.empty())
|
---|
| 782 | {
|
---|
| 783 | BvhNode *node = nodeStack.top();
|
---|
| 784 | nodeStack.pop();
|
---|
| 785 |
|
---|
[2773] | 786 | if (node->IsVirtualLeaf())
|
---|
[2746] | 787 | {
|
---|
[2786] | 788 | ++ numVirtualLeaves;
|
---|
| 789 |
|
---|
[2746] | 790 | BvhLeaf *leaf = static_cast<BvhLeaf *>(node);
|
---|
| 791 |
|
---|
[2773] | 792 | mBvhStats.mTriangles += CountTriangles(leaf);
|
---|
[2755] | 793 | mBvhStats.mLeafSA += leaf->mBox.SurfaceArea();
|
---|
| 794 | mBvhStats.mLeafVol += leaf->mBox.GetVolume();
|
---|
[2746] | 795 | }
|
---|
| 796 | else
|
---|
| 797 | {
|
---|
[2755] | 798 | mBvhStats.mInteriorSA += node->mBox.SurfaceArea();
|
---|
| 799 | mBvhStats.mInteriorVol += node->mBox.GetVolume();
|
---|
[2746] | 800 |
|
---|
| 801 | BvhInterior *interior = static_cast<BvhInterior *>(node);
|
---|
| 802 |
|
---|
| 803 | nodeStack.push(interior->mBack);
|
---|
| 804 | nodeStack.push(interior->mFront);
|
---|
| 805 | }
|
---|
| 806 | }
|
---|
| 807 |
|
---|
[2786] | 808 | mBvhStats.mGeometryRatio = mGeometrySize / (float)numVirtualLeaves;
|
---|
| 809 | mBvhStats.mTriangleRatio = mBvhStats.mTriangles / (float)numVirtualLeaves;
|
---|
[2746] | 810 | }
|
---|
| 811 |
|
---|
| 812 |
|
---|
| 813 | void Bvh::PrintBvhStats() const
|
---|
| 814 | {
|
---|
[2885] | 815 | cout << "\n******** bvh stats: ***********" << endl;
|
---|
[2755] | 816 | cout << "interiorNodesSA = " << mBvhStats.mInteriorSA / mRoot->mBox.SurfaceArea() << endl;
|
---|
| 817 | cout << "leafNodesSA = " << mBvhStats.mLeafSA / mRoot->mBox.SurfaceArea() << endl;
|
---|
| 818 | cout << "interiorNodesVolume = " << mBvhStats.mInteriorVol / mRoot->mBox.GetVolume() << endl;
|
---|
| 819 | cout << "leafNodesVolume = " << mBvhStats.mLeafVol / mRoot->mBox.GetVolume() << endl;
|
---|
[2746] | 820 |
|
---|
[2755] | 821 | cout << "geometry per leaf: " << mBvhStats.mGeometryRatio << endl;
|
---|
| 822 | cout << "triangles per leaf: " << mBvhStats.mTriangleRatio << endl;
|
---|
[2885] | 823 | cout << "**************" << endl << endl;
|
---|
[2746] | 824 | }
|
---|
| 825 |
|
---|
| 826 |
|
---|
| 827 | int Bvh::CountTriangles(BvhNode *node) const
|
---|
| 828 | {
|
---|
| 829 | int numTriangles = 0;
|
---|
| 830 |
|
---|
| 831 | for (int i = node->mFirst; i <= node->mLast; ++ i)
|
---|
[2774] | 832 | {
|
---|
[2848] | 833 | numTriangles += mGeometry[i]->CountNumTriangles(0);
|
---|
[2774] | 834 | }
|
---|
| 835 |
|
---|
[2746] | 836 | return numTriangles;
|
---|
| 837 | }
|
---|
| 838 |
|
---|
| 839 |
|
---|
[2756] | 840 | float Bvh::GetArea(BvhNode *node) const
|
---|
[2746] | 841 | {
|
---|
| 842 | return node->mArea;
|
---|
| 843 | }
|
---|
| 844 |
|
---|
[2760] | 845 |
|
---|
| 846 | void Bvh::UpdateNumLeaves(BvhNode *node) const
|
---|
| 847 | {
|
---|
| 848 | if (node->IsLeaf())
|
---|
| 849 | {
|
---|
| 850 | node->mNumLeaves = 1;
|
---|
| 851 | }
|
---|
| 852 | else
|
---|
| 853 | {
|
---|
| 854 | BvhNode *f = static_cast<BvhInterior *>(node)->GetFront();
|
---|
| 855 | BvhNode *b = static_cast<BvhInterior *>(node)->GetBack();
|
---|
| 856 |
|
---|
| 857 | UpdateNumLeaves(f);
|
---|
| 858 | UpdateNumLeaves(b);
|
---|
| 859 |
|
---|
| 860 | node->mNumLeaves = f->mNumLeaves + b->mNumLeaves;
|
---|
| 861 | }
|
---|
[2746] | 862 | }
|
---|
[2760] | 863 |
|
---|
| 864 |
|
---|
[2761] | 865 | void Bvh::CollectVirtualLeaves(BvhNode *node, BvhNodeContainer &leaves)
|
---|
| 866 | {
|
---|
| 867 | stack<BvhNode *> tStack;
|
---|
| 868 | tStack.push(node);
|
---|
| 869 |
|
---|
| 870 | while (!tStack.empty())
|
---|
| 871 | {
|
---|
| 872 | BvhNode *node = tStack.top();
|
---|
| 873 | tStack.pop();
|
---|
| 874 |
|
---|
| 875 | if (node->mIsVirtualLeaf)
|
---|
| 876 | {
|
---|
| 877 | leaves.push_back(node);
|
---|
| 878 | }
|
---|
| 879 | else if (!node->IsLeaf())
|
---|
| 880 | {
|
---|
| 881 | BvhInterior *interior = static_cast<BvhInterior *>(node);
|
---|
| 882 |
|
---|
| 883 | tStack.push(interior->mFront);
|
---|
| 884 | tStack.push(interior->mBack);
|
---|
| 885 | }
|
---|
| 886 | }
|
---|
[2760] | 887 | }
|
---|
[2761] | 888 |
|
---|
| 889 |
|
---|
| 890 | void Bvh::SetVirtualLeaves(int numTriangles)
|
---|
| 891 | {
|
---|
| 892 | // first invalidate old leaves
|
---|
| 893 | BvhNodeContainer leaves;
|
---|
| 894 |
|
---|
| 895 | CollectVirtualLeaves(mRoot, leaves);
|
---|
| 896 |
|
---|
| 897 | BvhNodeContainer::const_iterator bit, bit_end = leaves.end();
|
---|
| 898 |
|
---|
| 899 | for (bit = leaves.begin(); bit != bit_end; ++ bit)
|
---|
| 900 | {
|
---|
| 901 | (*bit)->mIsVirtualLeaf = false;
|
---|
| 902 | }
|
---|
| 903 |
|
---|
[2764] | 904 | mNumVirtualNodes = 0;
|
---|
| 905 |
|
---|
[2761] | 906 | // assign new virtual leaves based on specified number of triangles per leaf
|
---|
| 907 | std::stack<BvhNode *> nodeStack;
|
---|
| 908 | nodeStack.push(mRoot);
|
---|
| 909 |
|
---|
| 910 | while (!nodeStack.empty())
|
---|
| 911 | {
|
---|
| 912 | BvhNode *node = nodeStack.top();
|
---|
| 913 | nodeStack.pop();
|
---|
| 914 |
|
---|
[2764] | 915 | ++ mNumVirtualNodes;
|
---|
| 916 |
|
---|
[2761] | 917 | if (node->IsLeaf())
|
---|
| 918 | {
|
---|
| 919 | BvhLeaf *leaf = static_cast<BvhLeaf *>(node);
|
---|
| 920 | leaf->mIsVirtualLeaf = true;
|
---|
| 921 | }
|
---|
| 922 | else
|
---|
| 923 | {
|
---|
| 924 | BvhInterior *interior = static_cast<BvhInterior *>(node);
|
---|
| 925 |
|
---|
| 926 | BvhNode *f = interior->mFront;
|
---|
| 927 | BvhNode *b = interior->mBack;
|
---|
| 928 |
|
---|
| 929 | if (node->mIsMaxDepthForVirtualLeaf || (CountTriangles(node) <= numTriangles))
|
---|
| 930 | {
|
---|
| 931 | node->mIsVirtualLeaf = true;
|
---|
| 932 | }
|
---|
| 933 | else
|
---|
| 934 | {
|
---|
| 935 | nodeStack.push(interior->mBack);
|
---|
| 936 | nodeStack.push(interior->mFront);
|
---|
| 937 | }
|
---|
| 938 | }
|
---|
| 939 | }
|
---|
[2800] | 940 |
|
---|
| 941 | ResetNodeClassifications();
|
---|
[2761] | 942 | }
|
---|
| 943 |
|
---|
| 944 |
|
---|
| 945 | void Bvh::PostProcess()
|
---|
| 946 | {
|
---|
| 947 | std::stack<BvhNode *> nodeStack;
|
---|
| 948 | nodeStack.push(mRoot);
|
---|
| 949 |
|
---|
| 950 | while (!nodeStack.empty())
|
---|
| 951 | {
|
---|
| 952 | BvhNode *node = nodeStack.top();
|
---|
| 953 | nodeStack.pop();
|
---|
| 954 |
|
---|
| 955 | if (node->IsLeaf())
|
---|
| 956 | {
|
---|
| 957 | node->mIsMaxDepthForVirtualLeaf = true;
|
---|
| 958 | }
|
---|
| 959 | else
|
---|
| 960 | {
|
---|
| 961 | BvhInterior *interior = static_cast<BvhInterior *>(node);
|
---|
| 962 |
|
---|
| 963 | BvhNode *f = interior->mFront;
|
---|
| 964 | BvhNode *b = interior->mBack;
|
---|
| 965 |
|
---|
| 966 | // point reached where we cannot subdivide further on object level
|
---|
| 967 | if ((f->mFirst == b->mFirst) && (f->mLast == b->mLast))
|
---|
| 968 | {
|
---|
| 969 | node->mIsMaxDepthForVirtualLeaf = true;
|
---|
| 970 | }
|
---|
| 971 | else
|
---|
| 972 | {
|
---|
| 973 | nodeStack.push(f);
|
---|
| 974 | nodeStack.push(b);
|
---|
| 975 | }
|
---|
| 976 | }
|
---|
| 977 | }
|
---|
| 978 | }
|
---|
| 979 |
|
---|
| 980 |
|
---|
[2763] | 981 | void Bvh::RenderBoundingBoxImmediate(const AxisAlignedBox3 &box)
|
---|
| 982 | {
|
---|
| 983 | const Vector3 l = box.Min();
|
---|
| 984 | const Vector3 u = box.Max();
|
---|
| 985 |
|
---|
[2764] | 986 | glBegin(GL_TRIANGLE_STRIP);
|
---|
| 987 | {
|
---|
| 988 | ///////////
|
---|
| 989 | //-- render AABB as triangle strips
|
---|
[2763] | 990 |
|
---|
[2764] | 991 | glVertex3f(l.x, l.y, u.z);
|
---|
| 992 | glVertex3f(u.x, l.y, u.z);
|
---|
| 993 | glVertex3f(l.x, u.y, u.z);
|
---|
| 994 | glVertex3f(u.x, u.y, u.z);
|
---|
| 995 | glVertex3f(l.x, u.y, l.z);
|
---|
| 996 | glVertex3f(u.x, u.y, l.z);
|
---|
| 997 | glVertex3f(l.x, l.y, l.z);
|
---|
| 998 | glVertex3f(u.x, l.y, l.z);
|
---|
[2763] | 999 |
|
---|
[2764] | 1000 | glPrimitiveRestartNV();
|
---|
[2763] | 1001 |
|
---|
[2764] | 1002 | //-- render second half of AABB
|
---|
| 1003 | glVertex3f(l.x, u.y, u.z);
|
---|
| 1004 | glVertex3f(l.x, u.y, l.z);
|
---|
| 1005 | glVertex3f(l.x, l.y, u.z);
|
---|
| 1006 | glVertex3f(l.x, l.y, l.z);
|
---|
| 1007 | glVertex3f(u.x, l.y, u.z);
|
---|
| 1008 | glVertex3f(u.x, l.y, l.z);
|
---|
| 1009 | glVertex3f(u.x, u.y, u.z);
|
---|
| 1010 | glVertex3f(u.x, u.y, l.z);
|
---|
| 1011 | }
|
---|
| 1012 | glEnd();
|
---|
[2761] | 1013 | }
|
---|
[2763] | 1014 |
|
---|
[2790] | 1015 |
|
---|
| 1016 |
|
---|
| 1017 |
|
---|
| 1018 | static void RenderBoxForViz(const AxisAlignedBox3 &box)
|
---|
| 1019 | {
|
---|
| 1020 | glBegin(GL_LINE_LOOP);
|
---|
| 1021 | glVertex3d(box.Min().x, box.Max().y, box.Min().z);
|
---|
| 1022 | glVertex3d(box.Max().x, box.Max().y, box.Min().z);
|
---|
| 1023 | glVertex3d(box.Max().x, box.Min().y, box.Min().z);
|
---|
| 1024 | glVertex3d(box.Min().x, box.Min().y, box.Min().z);
|
---|
| 1025 | glEnd();
|
---|
| 1026 |
|
---|
| 1027 | glBegin(GL_LINE_LOOP);
|
---|
| 1028 | glVertex3d(box.Min().x, box.Min().y, box.Max().z);
|
---|
| 1029 | glVertex3d(box.Max().x, box.Min().y, box.Max().z);
|
---|
| 1030 | glVertex3d(box.Max().x, box.Max().y, box.Max().z);
|
---|
| 1031 | glVertex3d(box.Min().x, box.Max().y, box.Max().z);
|
---|
| 1032 | glEnd();
|
---|
| 1033 |
|
---|
| 1034 | glBegin(GL_LINE_LOOP);
|
---|
| 1035 | glVertex3d(box.Max().x, box.Min().y, box.Min().z);
|
---|
| 1036 | glVertex3d(box.Max().x, box.Min().y, box.Max().z);
|
---|
| 1037 | glVertex3d(box.Max().x, box.Max().y, box.Max().z);
|
---|
| 1038 | glVertex3d(box.Max().x, box.Max().y, box.Min().z);
|
---|
| 1039 | glEnd();
|
---|
| 1040 |
|
---|
| 1041 | glBegin(GL_LINE_LOOP);
|
---|
| 1042 | glVertex3d(box.Min().x, box.Min().y, box.Min().z);
|
---|
| 1043 | glVertex3d(box.Min().x, box.Min().y, box.Max().z);
|
---|
| 1044 | glVertex3d(box.Min().x, box.Max().y, box.Max().z);
|
---|
| 1045 | glVertex3d(box.Min().x, box.Max().y, box.Min().z);
|
---|
| 1046 | glEnd();
|
---|
| 1047 |
|
---|
| 1048 | glBegin(GL_LINE_LOOP);
|
---|
| 1049 | glVertex3d(box.Min().x, box.Min().y, box.Min().z);
|
---|
| 1050 | glVertex3d(box.Max().x, box.Min().y, box.Min().z);
|
---|
| 1051 | glVertex3d(box.Max().x, box.Min().y, box.Max().z);
|
---|
| 1052 | glVertex3d(box.Min().x, box.Min().y, box.Max().z);
|
---|
| 1053 | glEnd();
|
---|
| 1054 |
|
---|
| 1055 | glBegin(GL_LINE_LOOP);
|
---|
| 1056 | glVertex3d(box.Min().x, box.Max().y, box.Min().z);
|
---|
| 1057 | glVertex3d(box.Max().x, box.Max().y, box.Min().z);
|
---|
| 1058 | glVertex3d(box.Max().x, box.Max().y, box.Max().z);
|
---|
| 1059 | glVertex3d(box.Min().x, box.Max().y, box.Max().z);
|
---|
| 1060 |
|
---|
| 1061 | glEnd();
|
---|
| 1062 | }
|
---|
| 1063 |
|
---|
| 1064 |
|
---|
[2825] | 1065 | void Bvh::RenderBoundsForViz(BvhNode *node, RenderState *state, bool useTightBounds)
|
---|
[2790] | 1066 | {
|
---|
| 1067 | glDisable(GL_TEXTURE_2D);
|
---|
| 1068 | glDisable(GL_LIGHTING);
|
---|
| 1069 | glColor3f(1, 1, 1);
|
---|
[2825] | 1070 |
|
---|
| 1071 | // hack: for deferred shading we have to define a material
|
---|
| 1072 | static Material boxMat;
|
---|
| 1073 | boxMat.SetEmmisive(RgbaColor(1.0f, 1.0f, 1.0f, 1.0f));
|
---|
| 1074 |
|
---|
| 1075 | boxMat.Render(state);
|
---|
| 1076 |
|
---|
[2790] | 1077 | if (!useTightBounds)
|
---|
| 1078 | {
|
---|
| 1079 | RenderBoxForViz(node->GetBox());
|
---|
| 1080 | }
|
---|
| 1081 | else
|
---|
| 1082 | {
|
---|
| 1083 | for (int i = 0; i < node->mNumTestNodes; ++ i)
|
---|
| 1084 | {
|
---|
| 1085 | RenderBoxForViz(mTestNodes[node->mTestNodesIdx + i]->GetBox());
|
---|
| 1086 | }
|
---|
| 1087 | }
|
---|
| 1088 |
|
---|
| 1089 | glEnable(GL_LIGHTING);
|
---|
| 1090 | glEnable(GL_TEXTURE_2D);
|
---|
| 1091 | }
|
---|
| 1092 |
|
---|
| 1093 |
|
---|
| 1094 |
|
---|
[2764] | 1095 | } |
---|