[3870] | 1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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| 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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| 6 | |
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| 7 | #include <iostream> |
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| 8 | #include <float.h> |
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| 9 | |
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| 10 | #include <vtkSmartPointer.h> |
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| 11 | #include <vtkDataSet.h> |
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| 12 | #include <vtkImageData.h> |
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[3935] | 13 | #include <vtkPointData.h> |
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| 14 | #include <vtkDataArray.h> |
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[3870] | 15 | #include <vtkDataSetReader.h> |
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| 16 | #include <vtkCharArray.h> |
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| 17 | |
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| 18 | #include <vrmath/Vector3f.h> |
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| 19 | |
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| 20 | #include "ReaderCommon.h" |
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| 21 | #include "DataSetResample.h" |
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| 22 | |
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| 23 | #include "config.h" |
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| 24 | #include "nanovis.h" |
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| 25 | #include "VtkDataSetReader.h" |
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| 26 | #include "Volume.h" |
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| 27 | #include "Trace.h" |
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| 28 | |
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| 29 | using namespace nv; |
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| 30 | |
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| 31 | Volume * |
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[4063] | 32 | nv::load_vtk_volume_stream(const char *tag, const char *bytes, int nBytes) |
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[3870] | 33 | { |
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| 34 | TRACE("Enter tag:%s", tag); |
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| 35 | |
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| 36 | vtkSmartPointer<vtkImageData> resampledDataSet; |
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| 37 | { |
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| 38 | vtkSmartPointer<vtkDataSet> dataSet; |
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| 39 | { |
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| 40 | vtkSmartPointer<vtkDataSetReader> reader = vtkSmartPointer<vtkDataSetReader>::New(); |
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| 41 | vtkSmartPointer<vtkCharArray> dataSetString = vtkSmartPointer<vtkCharArray>::New(); |
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| 42 | |
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| 43 | dataSetString->SetArray(const_cast<char *>(bytes), nBytes, 1); |
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| 44 | reader->SetInputArray(dataSetString); |
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| 45 | reader->ReadFromInputStringOn(); |
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| 46 | //reader->ReadAllNormalsOn(); |
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| 47 | //reader->ReadAllTCoordsOn(); |
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| 48 | reader->ReadAllScalarsOn(); |
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| 49 | //reader->ReadAllColorScalarsOn(); |
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| 50 | reader->ReadAllVectorsOn(); |
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| 51 | //reader->ReadAllTensorsOn(); |
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[4164] | 52 | reader->ReadAllFieldsOn(); |
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[3870] | 53 | reader->SetLookupTableName(""); |
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| 54 | reader->Update(); |
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| 55 | |
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| 56 | dataSet = reader->GetOutput(); |
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| 57 | } |
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| 58 | |
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| 59 | if (dataSet == NULL) |
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| 60 | return NULL; |
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| 61 | |
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| 62 | int maxDim = 64; |
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| 63 | |
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| 64 | resampledDataSet = vtkImageData::SafeDownCast(dataSet.GetPointer()); |
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| 65 | if (resampledDataSet != NULL) { |
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| 66 | // Have a uniform grid, check if we need to resample |
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| 67 | #ifdef DOWNSAMPLE_DATA |
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| 68 | if (resampledDataSet->GetDimensions()[0] > maxDim || |
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| 69 | resampledDataSet->GetDimensions()[1] > maxDim || |
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| 70 | resampledDataSet->GetDimensions()[2] > maxDim) { |
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| 71 | resampledDataSet = resampleVTKDataSet(dataSet, maxDim); |
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| 72 | } |
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| 73 | #endif |
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| 74 | } else { |
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| 75 | resampledDataSet = resampleVTKDataSet(dataSet, maxDim); |
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| 76 | } |
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| 77 | } |
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| 78 | |
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| 79 | int nx, ny, nz, npts; |
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| 80 | // origin |
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| 81 | double x0, y0, z0; |
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| 82 | // deltas (cell dimensions) |
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| 83 | double dx, dy, dz; |
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| 84 | // length of volume edges |
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| 85 | double lx, ly, lz; |
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| 86 | |
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| 87 | nx = resampledDataSet->GetDimensions()[0]; |
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| 88 | ny = resampledDataSet->GetDimensions()[1]; |
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| 89 | nz = resampledDataSet->GetDimensions()[2]; |
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| 90 | npts = nx * ny * nz; |
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| 91 | resampledDataSet->GetSpacing(dx, dy, dz); |
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| 92 | resampledDataSet->GetOrigin(x0, y0, z0); |
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| 93 | |
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| 94 | lx = (nx - 1) * dx; |
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| 95 | ly = (ny - 1) * dy; |
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| 96 | lz = (nz - 1) * dz; |
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| 97 | |
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| 98 | Volume *volume = NULL; |
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| 99 | double vmin = DBL_MAX; |
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| 100 | double nzero_min = DBL_MAX; |
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| 101 | double vmax = -DBL_MAX; |
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| 102 | |
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| 103 | float *data = new float[npts * 4]; |
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| 104 | memset(data, 0, npts * 4); |
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| 105 | |
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[3935] | 106 | bool isVectorData = (resampledDataSet->GetPointData()->GetVectors() != NULL); |
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| 107 | |
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[3870] | 108 | int ix = 0; |
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| 109 | int iy = 0; |
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| 110 | int iz = 0; |
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[4385] | 111 | vtkDataArray *mask = resampledDataSet->GetPointData()->GetArray("vtkValidPointMask"); |
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[3870] | 112 | for (int p = 0; p < npts; p++) { |
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| 113 | int nindex = p * 4; |
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[3935] | 114 | double val; |
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[4385] | 115 | int loc[3]; |
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| 116 | loc[0] = ix; loc[1] = iy; loc[2] = iz; |
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| 117 | vtkIdType idx = resampledDataSet->ComputePointId(loc); |
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| 118 | bool valid = (mask->GetComponent(idx, 0) != 0.0); |
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[3935] | 119 | if (isVectorData) { |
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| 120 | double vec[3]; |
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| 121 | resampledDataSet->GetPointData()->GetVectors()->GetTuple(idx, vec); |
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[3943] | 122 | val = sqrt(vec[0]*vec[0] + vec[1]*vec[1] + vec[2]*vec[2]); |
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[3935] | 123 | data[nindex] = (float)val; |
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| 124 | data[nindex+1] = (float)vec[0]; |
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| 125 | data[nindex+2] = (float)vec[1]; |
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| 126 | data[nindex+3] = (float)vec[2]; |
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| 127 | } else { |
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[4385] | 128 | //val = resampledDataSet->GetScalarComponentAsDouble(ix, iy, iz, 0); |
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| 129 | val = resampledDataSet->GetPointData()->GetScalars()->GetComponent(idx, 0); |
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| 130 | data[nindex] = valid ? (float)val : -FLT_MAX; |
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[3935] | 131 | } |
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[4385] | 132 | if (valid) { |
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| 133 | if (val < vmin) { |
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| 134 | vmin = val; |
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| 135 | } else if (val > vmax) { |
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| 136 | vmax = val; |
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| 137 | } |
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| 138 | if (val != 0.0 && val < nzero_min) { |
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| 139 | nzero_min = val; |
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| 140 | } |
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[3870] | 141 | } |
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| 142 | |
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| 143 | if (++ix >= nx) { |
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| 144 | ix = 0; |
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| 145 | if (++iy >= ny) { |
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| 146 | iy = 0; |
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| 147 | ++iz; |
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| 148 | } |
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| 149 | } |
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| 150 | } |
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| 151 | |
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[3935] | 152 | if (isVectorData) { |
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| 153 | // Normalize magnitude [0,1] and vector components [0,1] |
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| 154 | normalizeVector(data, npts, vmin, vmax); |
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| 155 | } else { |
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| 156 | // scale all values [0-1], -1 => out of bounds |
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| 157 | normalizeScalar(data, npts, 4, vmin, vmax); |
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| 158 | computeSimpleGradient(data, nx, ny, nz, |
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| 159 | dx, dy, dz); |
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| 160 | } |
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[3870] | 161 | |
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[3943] | 162 | TRACE("isVectorData: %s", isVectorData ? "yes" : "no"); |
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[3870] | 163 | TRACE("nx = %i ny = %i nz = %i", nx, ny, nz); |
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| 164 | TRACE("x0 = %lg y0 = %lg z0 = %lg", x0, y0, z0); |
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| 165 | TRACE("lx = %lg ly = %lg lz = %lg", lx, ly, lz); |
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| 166 | TRACE("dx = %lg dy = %lg dz = %lg", dx, dy, dz); |
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| 167 | TRACE("dataMin = %lg dataMax = %lg nzero_min = %lg", |
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| 168 | vmin, vmax, nzero_min); |
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| 169 | |
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| 170 | volume = NanoVis::loadVolume(tag, nx, ny, nz, 4, data, |
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| 171 | vmin, vmax, nzero_min); |
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| 172 | volume->xAxis.setRange(x0, x0 + lx); |
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| 173 | volume->yAxis.setRange(y0, y0 + ly); |
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| 174 | volume->zAxis.setRange(z0, z0 + lz); |
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| 175 | volume->updatePending = true; |
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| 176 | |
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| 177 | delete [] data; |
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| 178 | |
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| 179 | TRACE("Leave"); |
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| 180 | return volume; |
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| 181 | } |
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