[2798] | 1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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[3502] | 2 | /* |
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| 3 | * Copyright (C) 2004-2013 HUBzero Foundation, LLC |
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| 4 | * |
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| 5 | */ |
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[884] | 6 | #include <string.h> |
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| 7 | #include <sys/time.h> |
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[2853] | 8 | |
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[3492] | 9 | #include <vrmath/Vector3f.h> |
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| 10 | |
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[2853] | 11 | #include "VolumeInterpolator.h" |
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| 12 | #include "Volume.h" |
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[884] | 13 | #include "Trace.h" |
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| 14 | |
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[4889] | 15 | using namespace nv; |
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[3492] | 16 | using namespace vrmath; |
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| 17 | |
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[927] | 18 | VolumeInterpolator::VolumeInterpolator() : |
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[4908] | 19 | _volume(NULL), |
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[927] | 20 | _interval(8.0), |
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| 21 | _started(false), |
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| 22 | _numBytes(0), |
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| 23 | _dataCount(0), |
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[2953] | 24 | _numComponents(0) |
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[884] | 25 | { |
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| 26 | } |
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| 27 | |
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| 28 | void VolumeInterpolator::start() |
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| 29 | { |
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[4904] | 30 | if (!_volumes.empty()) { |
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[3452] | 31 | TRACE("Volume Interpolation Started"); |
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[927] | 32 | _started = true; |
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| 33 | } else { |
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[3452] | 34 | TRACE("Volume Interpolation NOT Started"); |
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[884] | 35 | _started = false; |
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| 36 | } |
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| 37 | struct timeval clock; |
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| 38 | gettimeofday(&clock, NULL); |
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[2877] | 39 | _startTime = clock.tv_sec + clock.tv_usec/1000000.0; |
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[3452] | 40 | TRACE("Leave"); |
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[884] | 41 | } |
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| 42 | |
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| 43 | void VolumeInterpolator::stop() |
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| 44 | { |
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[927] | 45 | _started = false; |
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[884] | 46 | } |
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| 47 | |
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[2853] | 48 | Volume *VolumeInterpolator::update(float fraction) |
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[884] | 49 | { |
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| 50 | int key1, key2; |
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| 51 | float interp; |
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| 52 | |
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[4908] | 53 | computeKeys(fraction, (int)_volumes.size(), &interp, &key1, &key2); |
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[884] | 54 | |
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[927] | 55 | if (interp == 0.0f) { |
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[1478] | 56 | memcpy(_volume->data(), _volumes[key1]->data(), _numBytes); |
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| 57 | _volume->tex()->update(_volume->data()); |
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[927] | 58 | } else { |
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[2853] | 59 | float *data1 = _volumes[key1]->data(); |
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| 60 | float *data2 = _volumes[key2]->data(); |
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| 61 | float *result = _volume->data(); |
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[884] | 62 | |
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[3492] | 63 | Vector3f normal1, normal2, normal; |
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[927] | 64 | for (unsigned int i = 0; i < _dataCount; ++i) { |
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[884] | 65 | *result = interp * (*data2 - *data1) + *data1; |
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[3492] | 66 | normal1 = (*(Vector3f*)(data1 + 1) - 0.5) * 2; |
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| 67 | normal2 = (*(Vector3f*)(data2 + 1) - 0.5) * 2; |
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[4908] | 68 | normal = (normal2 - normal1) * interp + normal1; |
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[900] | 69 | normal = normal.normalize(); |
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| 70 | normal = normal * 0.5 + 0.5; |
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[3492] | 71 | *((Vector3f*)(result + 1)) = normal; |
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[884] | 72 | |
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[2877] | 73 | result += _numComponents; |
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| 74 | data1 += _numComponents; |
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| 75 | data2 += _numComponents; |
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[884] | 76 | } |
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| 77 | |
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[1478] | 78 | _volume->tex()->update(_volume->data()); |
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[884] | 79 | } |
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[2853] | 80 | |
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[884] | 81 | return _volume; |
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| 82 | } |
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| 83 | |
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[2853] | 84 | void |
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| 85 | VolumeInterpolator::computeKeys(float fraction, int count, float *interp, |
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| 86 | int *key1, int *key2) |
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[884] | 87 | { |
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[4908] | 88 | int limit = count - 1; |
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[927] | 89 | if (fraction <= 0) { |
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| 90 | *key1 = *key2 = 0; |
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[884] | 91 | *interp = 0.0f; |
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[927] | 92 | } else if (fraction >= 1.0f) { |
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| 93 | *key1 = *key2 = limit; |
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[884] | 94 | *interp = 0.0f; |
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[927] | 95 | } else { |
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[884] | 96 | int n; |
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[4908] | 97 | for (n = 0; n < limit; n++) { |
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| 98 | if (fraction >= (n / (count - 1.0f)) && |
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[927] | 99 | fraction < ((n+1)/(count-1.0f))) { |
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| 100 | break; |
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| 101 | } |
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[884] | 102 | } |
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[2853] | 103 | |
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[3452] | 104 | TRACE("n = %d count = %d", n, count); |
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[2853] | 105 | if (n >= limit) { |
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[927] | 106 | *key1 = *key2 = limit; |
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[884] | 107 | *interp = 0.0f; |
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[927] | 108 | } else { |
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| 109 | *key1 = n; |
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[884] | 110 | *key2 = n+1; |
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[927] | 111 | *interp = (fraction - (n / (count -1.0f))) / ((n + 1) / (count - 1.0f) - n / (count - 1.0f)); |
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[884] | 112 | //*ret = inter * (keyValue[n + 1] - keyValue[n]) + keyValue[n]; |
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| 113 | } |
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| 114 | } |
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| 115 | } |
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| 116 | |
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[2853] | 117 | void |
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[927] | 118 | VolumeInterpolator::clearAll() |
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[884] | 119 | { |
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[927] | 120 | _volumes.clear(); |
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[884] | 121 | } |
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| 122 | |
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[2853] | 123 | void |
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[4612] | 124 | VolumeInterpolator::addVolume(Volume *volume) |
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[884] | 125 | { |
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[4904] | 126 | if (!_volumes.empty()) { |
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[4612] | 127 | if (_volumes[0]->width() != volume->width() || |
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| 128 | _volumes[0]->height() != volume->height() || |
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| 129 | _volumes[0]->depth() != volume->depth() || |
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| 130 | _volumes[0]->numComponents() != volume->numComponents()) { |
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[3452] | 131 | TRACE("The volume should be the same width, height, number of components"); |
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[884] | 132 | return; |
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| 133 | } |
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[927] | 134 | } else { |
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[4612] | 135 | _dataCount = volume->width() * volume->height() * volume->depth(); |
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| 136 | _numComponents = volume->numComponents(); |
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[2877] | 137 | _numBytes = _dataCount * _numComponents * sizeof(float); |
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[4904] | 138 | Vector3f pos = volume->getPosition(); |
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| 139 | _volume = new Volume(pos.x, pos.y, pos.z, |
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[4612] | 140 | volume->width(), |
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| 141 | volume->height(), |
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| 142 | volume->depth(), |
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| 143 | volume->numComponents(), |
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| 144 | volume->data(), |
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| 145 | volume->wAxis.min(), |
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| 146 | volume->wAxis.max(), |
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| 147 | volume->nonZeroMin()); |
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[3362] | 148 | |
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[4904] | 149 | _volume->setPosition(volume->getPosition()); |
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| 150 | _volume->setScale(volume->getScale()); |
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[2877] | 151 | _volume->disableCutplane(0); |
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| 152 | _volume->disableCutplane(1); |
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| 153 | _volume->disableCutplane(2); |
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[1474] | 154 | _volume->visible(true); |
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[2877] | 155 | _volume->dataEnabled(true); |
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[4612] | 156 | _volume->ambient(volume->ambient()); |
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| 157 | _volume->diffuse(volume->diffuse()); |
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| 158 | _volume->specularLevel(volume->specularLevel()); |
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| 159 | _volume->specularExponent(volume->specularExponent()); |
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| 160 | _volume->opacityScale(volume->opacityScale()); |
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[1478] | 161 | _volume->isosurface(0); |
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[884] | 162 | } |
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[4908] | 163 | _volumes.push_back(volume); |
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[4904] | 164 | TRACE("Volume \"%s\" is added to VolumeInterpolator", volume->name()); |
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[884] | 165 | } |
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| 166 | |
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[2853] | 167 | Volume *VolumeInterpolator::getVolume() |
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[900] | 168 | { |
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| 169 | return _volume; |
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| 170 | } |
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