[2197] | 1 | #include "dxstdafx.h"
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| 2 | #include "mergetree.h"
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| 3 |
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| 4 | MergeTree::MergeTree(unsigned short nOccluders, Occluder* occArray)
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| 5 | :freeNodes( 4 )//nOccluders >>1)
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| 6 | {
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| 7 | maxR = 0.0f;
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| 8 | this->nOccluders = nOccluders;
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| 9 | locations = new unsigned short[nOccluders];
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| 10 | pool = new Node[nOccluders << 1];
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| 11 | nAllocated = 0;
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| 12 | occluders = occArray;
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| 13 | }
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| 14 |
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| 15 | MergeTree::~MergeTree(void)
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| 16 | {
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| 17 | delete pool;
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| 18 | }
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| 19 |
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| 20 |
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| 21 | void MergeTree::searchOptimalMerger(unsigned short p)
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| 22 | {
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| 23 | if(pool[p].type == MERGETREELEAFNODE)
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| 24 | {
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| 25 | if(indexOfCandidate == pool[p].occluderIndex)
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| 26 | {
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| 27 | foundMyselfAllRight = true;
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| 28 | return;
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| 29 | }
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| 30 | float R = occluders[indexOfCandidate].solidRadius;
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| 31 | float r = occluders[pool[p].occluderIndex].solidRadius;
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| 32 | Vector diff = occluders[pool[p].occluderIndex].centre - occluders[indexOfCandidate].centre;
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| 33 | float d = diff.norm();
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| 34 | float cost;
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| 35 | if(R > r)
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| 36 | cost = d;// + r - R;
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| 37 | else
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| 38 | cost = d;// + R - r;
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| 39 | if(cost < minCost){
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| 40 | minCost = cost;
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| 41 | minMerger = pool[p].occluderIndex;
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| 42 | }
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| 43 | return;
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| 44 | }
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| 45 | else
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| 46 | {
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| 47 | float distToCut = occluders[indexOfCandidate].centre[pool[p].type] - pool[p].cut;
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| 48 | if(distToCut > 0.0f)
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| 49 | {
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| 50 | searchOptimalMerger( pool[p].right );
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| 51 | if(distToCut < minCost /*+ maxR*/)
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| 52 | searchOptimalMerger( pool[p].left );
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| 53 | }
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| 54 | else
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| 55 | {
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| 56 | searchOptimalMerger( pool[p].left );
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| 57 | if(-distToCut < minCost /*+ maxR*/)
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| 58 | searchOptimalMerger( pool[p].right );
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| 59 | }
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| 60 | }
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| 61 | }
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| 62 |
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| 63 | void MergeTree::insert(unsigned short index)
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| 64 | {
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| 65 | if(occluders[index].solidRadius > maxR)
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| 66 | maxR = occluders[index].solidRadius;
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| 67 | if(nAllocated == 0)
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| 68 | {
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| 69 | locations[index] = 0;
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| 70 | pool[0].occluderIndex = index;
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| 71 | pool[0].type = MERGETREELEAFNODE;
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| 72 | pool[0].parent = 0;
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| 73 | nAllocated++;
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| 74 | }
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| 75 | else
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| 76 | {
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| 77 | unsigned short p = 0;
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| 78 | for(;;)
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| 79 | {
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| 80 | if(pool[p].type == MERGETREELEAFNODE)
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| 81 | {
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| 82 | unsigned short other = pool[p].occluderIndex;
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| 83 | if(freeNodes.isEmpty())
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| 84 | {
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| 85 | pool[p].left = nAllocated++;
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| 86 | pool[p].right = nAllocated++;
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| 87 | }
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| 88 | else
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| 89 | {
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| 90 | pool[p].left = freeNodes.removeMin();
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| 91 | pool[p].right = freeNodes.removeMin();
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| 92 | }
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| 93 |
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| 94 | Vector diff = occluders[index].centre - occluders[other].centre;
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| 95 |
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| 96 | char dominantDir;
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| 97 | if(fabsf(diff[0]) > fabsf(diff[1]))
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| 98 | if(fabsf(diff[0]) > fabsf(diff[2]))
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| 99 | dominantDir = 0;
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| 100 | else
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| 101 | dominantDir = 2;
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| 102 | else
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| 103 | if(fabsf(diff[1]) > fabsf(diff[2]))
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| 104 | dominantDir = 1;
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| 105 | else
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| 106 | dominantDir = 2;
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| 107 |
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| 108 | pool[p].type = dominantDir;
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| 109 | pool[p].cut = occluders[other].centre[dominantDir] + (diff[dominantDir] * 0.5f);
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| 110 | pool[pool[p].left].type = MERGETREELEAFNODE;
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| 111 | pool[pool[p].left].occluderIndex = (diff[dominantDir] > 0.0f)?other:index;
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| 112 | pool[pool[p].right].type = MERGETREELEAFNODE;
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| 113 | pool[pool[p].right].occluderIndex = (diff[dominantDir] > 0.0f)?index:other;
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| 114 | locations[other] = (diff[dominantDir] > 0.0f)?pool[p].left:pool[p].right;
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| 115 | locations[index] = (diff[dominantDir] > 0.0f)?pool[p].right:pool[p].left;
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| 116 | pool[locations[other]].parent = p;
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| 117 | pool[locations[index]].parent = p;
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| 118 | return;
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| 119 | }
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| 120 | else
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| 121 | {
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| 122 | if(occluders[index].centre[pool[p].type] > pool[p].cut)
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| 123 | p = pool[p].right;
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| 124 | else
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| 125 | p = pool[p].left;
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| 126 | }
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| 127 | }
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| 128 | }
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| 129 | }
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| 130 |
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| 131 | void MergeTree::remove(unsigned short index)
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| 132 | {
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| 133 | unsigned short p = locations[index];
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| 134 | unsigned short parent = pool[p].parent;
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| 135 | unsigned short grandpa = pool[parent].parent;
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| 136 | freeNodes.insert(pool[parent].left);
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| 137 | freeNodes.insert(pool[parent].right);
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| 138 | if(pool[parent].left == p)
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| 139 | pool[parent] = pool[pool[parent].right];
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| 140 | else
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| 141 | pool[parent] = pool[pool[parent].left];
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| 142 | pool[parent].parent = grandpa;
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| 143 | if(pool[parent].type == MERGETREELEAFNODE)
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| 144 | locations[pool[parent].occluderIndex] = parent;
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| 145 | else
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| 146 | {
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| 147 | pool[pool[parent].left].parent = parent;
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| 148 | pool[pool[parent].right].parent = parent;
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| 149 | }
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| 150 | }
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| 151 |
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| 152 | bool MergeTree::verify(unsigned short p, float minx, float maxx, float miny, float maxy, float minz, float maxz)
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| 153 | {
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| 154 | if(pool[p].type == MERGETREELEAFNODE)
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| 155 | {
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| 156 | Vector& a = occluders[pool[p].occluderIndex].centre;
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| 157 | return a.x >= minx && a.x <= maxx &&
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| 158 | a.y >= miny && a.y <= maxy &&
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| 159 | a.z >= minz && a.z <= maxz;
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| 160 | }
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| 161 | else
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| 162 | {
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| 163 | if(pool[p].type == 0)
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| 164 | return
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| 165 | verify(pool[p].left, minx, pool[p].cut, miny, maxy, minz, maxz)
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| 166 | &&
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| 167 | verify(pool[p].right, pool[p].cut, maxx, miny, maxy, minz, maxz);
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| 168 | if(pool[p].type == 1)
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| 169 | return
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| 170 | verify(pool[p].left, minx, maxx , miny, pool[p].cut, minz, maxz)
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| 171 | &&
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| 172 | verify(pool[p].right, minx, maxx, pool[p].cut, maxy, minz, maxz);
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| 173 | if(pool[p].type == 2)
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| 174 | return
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| 175 | verify(pool[p].left, minx, maxx , miny, maxy, minz, pool[p].cut)
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| 176 | &&
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| 177 | verify(pool[p].right, minx, maxx, miny, maxy, pool[p].cut, maxz);
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| 178 | }
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| 179 | } |
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