[3503] | 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 <RpField1D.h> |
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| 11 | #include <RpFieldRect3D.h> |
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| 12 | |
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| 13 | #include <vrmath/Vector3f.h> |
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| 14 | |
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| 15 | #include "ReaderCommon.h" |
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| 16 | |
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[3870] | 17 | #include "config.h" |
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[3503] | 18 | #include "nanovis.h" |
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| 19 | #include "VtkReader.h" |
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| 20 | #include "Volume.h" |
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| 21 | #include "Trace.h" |
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| 22 | |
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[3611] | 23 | using namespace nv; |
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| 24 | |
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[3503] | 25 | enum FieldType { |
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| 26 | FLOAT, |
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| 27 | DOUBLE, |
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[3506] | 28 | UCHAR, |
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| 29 | SHORT, |
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| 30 | USHORT, |
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| 31 | INT, |
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| 32 | UINT |
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[3503] | 33 | }; |
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| 34 | |
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| 35 | static inline int typeSize(FieldType type) |
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| 36 | { |
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| 37 | switch (type) { |
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| 38 | case FLOAT: |
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| 39 | return sizeof(float); |
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| 40 | case DOUBLE: |
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| 41 | return sizeof(double); |
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| 42 | case UCHAR: |
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| 43 | return sizeof(unsigned char); |
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[3506] | 44 | case SHORT: |
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| 45 | return sizeof(short); |
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| 46 | case USHORT: |
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| 47 | return sizeof(unsigned short); |
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| 48 | case INT: |
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| 49 | return sizeof(int); |
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| 50 | case UINT: |
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| 51 | return sizeof(unsigned int); |
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[3503] | 52 | default: |
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| 53 | return 0; |
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| 54 | } |
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| 55 | } |
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| 56 | |
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| 57 | static inline void allocFieldData(void **data, int npts, FieldType type) |
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| 58 | { |
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| 59 | switch (type) { |
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| 60 | case FLOAT: |
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| 61 | *data = (float *)(new float[npts]); |
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| 62 | break; |
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| 63 | case DOUBLE: |
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| 64 | *data = (double *)(new double[npts]); |
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| 65 | break; |
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| 66 | case UCHAR: |
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| 67 | *data = (unsigned char *)(new unsigned char[npts]); |
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| 68 | break; |
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[3506] | 69 | case SHORT: |
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| 70 | *data = (short *)(new short[npts]); |
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| 71 | break; |
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| 72 | case USHORT: |
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| 73 | *data = (unsigned short *)(new unsigned short[npts]); |
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| 74 | break; |
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| 75 | case INT: |
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| 76 | *data = (int *)(new int[npts]); |
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| 77 | break; |
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| 78 | case UINT: |
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| 79 | *data = (unsigned int *)(new unsigned int[npts]); |
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| 80 | break; |
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[3503] | 81 | default: |
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| 82 | ; |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | static inline void readFieldValue(void *data, int idx, FieldType type, std::iostream& fin) |
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| 87 | { |
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| 88 | switch (type) { |
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| 89 | case FLOAT: { |
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| 90 | float val; |
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| 91 | fin >> val; |
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| 92 | ((float *)data)[idx] = val; |
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| 93 | } |
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| 94 | break; |
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| 95 | case DOUBLE: { |
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| 96 | double val; |
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| 97 | fin >> val; |
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[3558] | 98 | ((double *)data)[idx] = val; |
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[3503] | 99 | } |
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| 100 | break; |
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[3506] | 101 | case SHORT: { |
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| 102 | short val; |
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[3503] | 103 | fin >> val; |
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[3506] | 104 | ((short *)data)[idx] = val; |
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[3503] | 105 | } |
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| 106 | break; |
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[3506] | 107 | case USHORT: { |
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| 108 | unsigned short val; |
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| 109 | fin >> val; |
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| 110 | ((unsigned short *)data)[idx] = val; |
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| 111 | } |
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| 112 | break; |
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| 113 | case INT: { |
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| 114 | int val; |
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| 115 | fin >> val; |
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| 116 | ((int *)data)[idx] = val; |
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| 117 | } |
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| 118 | break; |
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| 119 | case UINT: { |
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| 120 | unsigned int val; |
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| 121 | fin >> val; |
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| 122 | ((unsigned int *)data)[idx] = val; |
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| 123 | } |
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| 124 | break; |
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[3503] | 125 | default: |
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| 126 | break; |
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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 | static inline float getFieldData(void *data, int i, FieldType type) |
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| 132 | { |
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| 133 | switch (type) { |
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| 134 | case FLOAT: |
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| 135 | return ((float *)data)[i]; |
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| 136 | case DOUBLE: |
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| 137 | return (float)((double *)data)[i]; |
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| 138 | case UCHAR: |
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[3506] | 139 | return ((float)((unsigned char *)data)[i]); |
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| 140 | case SHORT: |
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| 141 | return (float)((short *)data)[i]; |
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| 142 | case USHORT: |
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| 143 | return (float)((unsigned short *)data)[i]; |
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| 144 | case INT: |
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| 145 | return (float)((int *)data)[i]; |
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| 146 | case UINT: |
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| 147 | return (float)((unsigned int *)data)[i]; |
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[3503] | 148 | default: |
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| 149 | return 0.0f; |
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| 150 | } |
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| 151 | } |
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| 152 | |
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| 153 | static inline void deleteFieldData(void *data, FieldType type) |
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| 154 | { |
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| 155 | if (data == NULL) |
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| 156 | return; |
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| 157 | switch (type) { |
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| 158 | case FLOAT: |
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| 159 | delete [] ((float *)data); |
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| 160 | break; |
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| 161 | case DOUBLE: |
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| 162 | delete [] ((double *)data); |
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| 163 | break; |
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| 164 | case UCHAR: |
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| 165 | delete [] ((unsigned char *)data); |
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| 166 | break; |
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[3506] | 167 | case SHORT: |
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| 168 | delete [] ((short *)data); |
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| 169 | break; |
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| 170 | case USHORT: |
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| 171 | delete [] ((unsigned short *)data); |
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| 172 | break; |
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| 173 | case INT: |
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| 174 | delete [] ((int *)data); |
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| 175 | break; |
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| 176 | case UINT: |
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| 177 | delete [] ((unsigned int *)data); |
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| 178 | break; |
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[3503] | 179 | default: |
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| 180 | ; |
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| 181 | } |
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| 182 | } |
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| 183 | |
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| 184 | Volume * |
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[4063] | 185 | nv::load_vtk_volume_stream(const char *tag, std::iostream& fin) |
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[3503] | 186 | { |
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| 187 | TRACE("Enter tag:%s", tag); |
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| 188 | |
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| 189 | int nx, ny, nz, npts; |
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| 190 | // origin |
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| 191 | double x0, y0, z0; |
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| 192 | // deltas (cell dimensions) |
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| 193 | double dx, dy, dz; |
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| 194 | // length of volume edges |
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| 195 | double lx, ly, lz; |
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| 196 | char line[128], str[128], type[128], *start; |
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| 197 | int isBinary = -1; |
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| 198 | int isRect = -1; |
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| 199 | FieldType ftype = DOUBLE; |
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| 200 | void *fieldData = NULL; |
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| 201 | int numRead = 0; |
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| 202 | |
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| 203 | dx = dy = dz = 0.0; |
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| 204 | x0 = y0 = z0 = 0.0; |
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| 205 | nx = ny = nz = npts = 0; |
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| 206 | while (!fin.eof()) { |
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| 207 | fin.getline(line, sizeof(line) - 1); |
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| 208 | if (fin.fail()) { |
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[4063] | 209 | ERROR("Error in data stream"); |
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[3503] | 210 | return NULL; |
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| 211 | } |
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| 212 | for (start = line; *start == ' ' || *start == '\t'; start++) |
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| 213 | ; // skip leading blanks |
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| 214 | |
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| 215 | if (*start != '#') { // skip comment lines |
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| 216 | if (strncmp(start, "BINARY", 6) == 0) { |
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| 217 | isBinary = 1; |
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| 218 | } else if (strncmp(start, "ASCII", 5) == 0) { |
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| 219 | isBinary = 0; |
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| 220 | } else if (sscanf(start, "DATASET %s", str) == 1) { |
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| 221 | if (strncmp(str, "STRUCTURED_POINTS", 17) == 0) { |
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| 222 | isRect = 1; |
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| 223 | } else { |
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[4063] | 224 | ERROR("Unsupported DataSet type '%s'", str); |
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[3503] | 225 | return NULL; |
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| 226 | } |
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| 227 | } else if (sscanf(start, "DIMENSIONS %d %d %d", &nx, &ny, &nz) == 3) { |
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[3569] | 228 | if (nx <= 0 || ny <= 0 || nz <= 0) { |
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[4063] | 229 | ERROR("Found non-positive dimensions"); |
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[3569] | 230 | return NULL; |
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| 231 | } |
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[3503] | 232 | // found dimensions |
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| 233 | } else if (sscanf(start, "ORIGIN %lg %lg %lg", &x0, &y0, &z0) == 3) { |
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| 234 | // found origin |
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| 235 | } else if (sscanf(start, "SPACING %lg %lg %lg", &dx, &dy, &dz) == 3) { |
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[3569] | 236 | if ((nx > 1 && dx == 0.0) || (ny > 1 && dy == 0.0) || (nz > 1 && dz == 0.0)) { |
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[4063] | 237 | ERROR("Found zero spacing for dimension"); |
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[3569] | 238 | return NULL; |
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| 239 | } |
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[3503] | 240 | // found cell spacing |
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| 241 | } else if (sscanf(start, "POINT_DATA %d", &npts) == 1) { |
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[3569] | 242 | if (npts < 1 || npts != nx * ny * nz) { |
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[4063] | 243 | ERROR("Error in data stream: unexpected number of point data: %d", npts); |
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[3503] | 244 | return NULL; |
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| 245 | } |
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| 246 | if (isBinary < 0 || fin.eof()) { |
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| 247 | // Should know if ASCII or BINARY by now |
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[4063] | 248 | ERROR("Error in data stream"); |
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[3503] | 249 | return NULL; |
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| 250 | } |
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| 251 | fin.getline(line, sizeof(line) - 1); |
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| 252 | if (fin.fail()) { |
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[4063] | 253 | ERROR("Error in data stream"); |
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[3503] | 254 | return NULL; |
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| 255 | } |
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[3504] | 256 | for (start = line; *start == ' ' || *start == '\t'; start++) |
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| 257 | ; // skip leading blanks |
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[3503] | 258 | if (sscanf(start, "SCALARS %s %s", str, type) != 2) { |
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[4063] | 259 | ERROR("Error in data stream"); |
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[3503] | 260 | return NULL; |
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| 261 | } |
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| 262 | if (strncmp(type, "double", 6) == 0) { |
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| 263 | ftype = DOUBLE; |
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| 264 | } else if (strncmp(type, "float", 5) == 0) { |
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| 265 | ftype = FLOAT; |
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| 266 | } else if (strncmp(type, "unsigned_char", 13) == 0) { |
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| 267 | ftype = UCHAR; |
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[3506] | 268 | if (!isBinary) { |
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[4063] | 269 | ERROR("unsigned char only supported in binary VTK files"); |
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[3506] | 270 | return NULL; |
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| 271 | } |
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| 272 | } else if (strncmp(type, "short", 5) == 0) { |
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| 273 | ftype = SHORT; |
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| 274 | } else if (strncmp(type, "unsigned_short", 14) == 0) { |
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| 275 | ftype = USHORT; |
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| 276 | } else if (strncmp(type, "int", 3) == 0) { |
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| 277 | ftype = INT; |
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| 278 | } else if (strncmp(type, "unsigned_int", 12) == 0) { |
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| 279 | ftype = UINT; |
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[3503] | 280 | } else { |
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[4063] | 281 | ERROR("Unsupported scalar type: '%s'", type); |
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[3503] | 282 | return NULL; |
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| 283 | } |
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| 284 | if (fin.eof()) { |
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[4063] | 285 | ERROR("Error in data stream"); |
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[3503] | 286 | return NULL; |
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| 287 | } |
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| 288 | fin.getline(line, sizeof(line) - 1); |
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| 289 | if (fin.fail()) { |
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[4063] | 290 | ERROR("Error in data stream"); |
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[3503] | 291 | return NULL; |
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| 292 | } |
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[3504] | 293 | for (start = line; *start == ' ' || *start == '\t'; start++) |
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| 294 | ; // skip leading blanks |
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| 295 | if (sscanf(start, "LOOKUP_TABLE %s", str) == 1) { |
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| 296 | // skip lookup table, but don't read ahead |
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[3503] | 297 | if (fin.eof()) { |
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[4063] | 298 | ERROR("Error in data stream"); |
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[3503] | 299 | return NULL; |
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| 300 | } |
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[3504] | 301 | } else { |
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| 302 | // Lookup table line is required |
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[4063] | 303 | ERROR("Missing LOOKUP_TABLE"); |
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[3504] | 304 | return NULL; |
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[3503] | 305 | } |
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| 306 | // found start of field data |
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| 307 | allocFieldData(&fieldData, npts, ftype); |
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| 308 | if (isBinary) { |
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| 309 | fin.read((char *)fieldData, npts * typeSize(ftype)); |
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| 310 | if (fin.fail()) { |
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| 311 | deleteFieldData(fieldData, ftype); |
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[4063] | 312 | ERROR("Error in data stream"); |
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[3503] | 313 | return NULL; |
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| 314 | } |
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| 315 | numRead = npts; |
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| 316 | } else { |
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| 317 | numRead = 0; |
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| 318 | while (!fin.eof() && numRead < npts) { |
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| 319 | readFieldValue(fieldData, numRead++, ftype, fin); |
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| 320 | if (fin.fail()) { |
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| 321 | deleteFieldData(fieldData, ftype); |
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[4063] | 322 | ERROR("Error in data stream"); |
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[3503] | 323 | return NULL; |
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| 324 | } |
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| 325 | } |
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| 326 | } |
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| 327 | |
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| 328 | break; |
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| 329 | } |
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| 330 | } |
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| 331 | } |
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| 332 | |
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[3569] | 333 | if (isRect < 0 || numRead != npts || npts < 1) { |
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[3503] | 334 | deleteFieldData(fieldData, ftype); |
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[4063] | 335 | ERROR("Error in data stream"); |
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[3503] | 336 | return NULL; |
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| 337 | } |
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| 338 | |
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| 339 | TRACE("found nx=%d ny=%d nz=%d\ndx=%f dy=%f dz=%f\nx0=%f y0=%f z0=%f", |
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| 340 | nx, ny, nz, dx, dy, dz, x0, y0, z0); |
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| 341 | |
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| 342 | lx = (nx - 1) * dx; |
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| 343 | ly = (ny - 1) * dy; |
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| 344 | lz = (nz - 1) * dz; |
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| 345 | |
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[3597] | 346 | Volume *volume = NULL; |
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[3503] | 347 | double vmin = DBL_MAX; |
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| 348 | double nzero_min = DBL_MAX; |
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| 349 | double vmax = -DBL_MAX; |
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| 350 | float *data = NULL; |
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| 351 | |
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| 352 | if (isRect) { |
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| 353 | #ifdef DOWNSAMPLE_DATA |
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| 354 | Rappture::Mesh1D xgrid(x0, x0 + lx, nx); |
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| 355 | Rappture::Mesh1D ygrid(y0, y0 + ly, ny); |
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| 356 | Rappture::Mesh1D zgrid(z0, z0 + lz, nz); |
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| 357 | Rappture::FieldRect3D field(xgrid, ygrid, zgrid); |
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| 358 | #else // !DOWNSAMPLE_DATA |
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[3521] | 359 | data = new float[npts * 4]; |
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| 360 | memset(data, 0, npts * 4); |
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[3503] | 361 | #endif // DOWNSAMPLE_DATA |
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| 362 | for (int p = 0; p < npts; p++) { |
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| 363 | #ifdef DOWNSAMPLE_DATA |
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[3521] | 364 | field.define(p, getFieldData(fieldData, p, ftype)); |
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[3503] | 365 | #else // !DOWNSAMPLE_DATA |
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[3521] | 366 | int nindex = p * 4; |
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[3503] | 367 | data[nindex] = getFieldData(fieldData, p, ftype); |
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| 368 | if (data[nindex] < vmin) { |
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| 369 | vmin = data[nindex]; |
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| 370 | } else if (data[nindex] > vmax) { |
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| 371 | vmax = data[nindex]; |
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| 372 | } |
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| 373 | if (data[nindex] != 0.0 && data[nindex] < nzero_min) { |
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| 374 | nzero_min = data[nindex]; |
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| 375 | } |
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| 376 | #endif // DOWNSAMPLE_DATA |
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| 377 | } |
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| 378 | |
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| 379 | deleteFieldData(fieldData, ftype); |
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| 380 | |
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| 381 | #ifndef DOWNSAMPLE_DATA |
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| 382 | |
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[3574] | 383 | // scale all values [0-1], -1 => out of bounds |
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| 384 | normalizeScalar(data, npts, 4, vmin, vmax); |
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[3503] | 385 | computeSimpleGradient(data, nx, ny, nz, |
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| 386 | dx, dy, dz); |
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| 387 | #else // DOWNSAMPLE_DATA |
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| 388 | // figure out a good mesh spacing |
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[3576] | 389 | int nsample = 64; |
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[3503] | 390 | double dmin = pow((lx*ly*lz)/((nsample-1)*(nsample-1)*(nsample-1)), 0.333); |
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| 391 | |
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| 392 | nx = (int)ceil(lx/dmin) + 1; |
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| 393 | ny = (int)ceil(ly/dmin) + 1; |
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| 394 | nz = (int)ceil(lz/dmin) + 1; |
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| 395 | |
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| 396 | #ifndef HAVE_NPOT_TEXTURES |
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| 397 | // must be an even power of 2 for older cards |
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| 398 | nx = (int)pow(2.0, ceil(log10((double)nx)/log10(2.0))); |
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| 399 | ny = (int)pow(2.0, ceil(log10((double)ny)/log10(2.0))); |
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| 400 | nz = (int)pow(2.0, ceil(log10((double)nz)/log10(2.0))); |
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| 401 | #endif |
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| 402 | |
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| 403 | dx = lx /(double)(nx - 1); |
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| 404 | dy = ly /(double)(ny - 1); |
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| 405 | dz = lz /(double)(nz - 1); |
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| 406 | |
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| 407 | vmin = field.valueMin(); |
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| 408 | vmax = field.valueMax(); |
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| 409 | nzero_min = DBL_MAX; |
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| 410 | double dv = vmax - vmin; |
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| 411 | if (dv == 0.0) { |
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| 412 | dv = 1.0; |
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| 413 | } |
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| 414 | |
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| 415 | int ngen = 0; |
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| 416 | #ifdef FILTER_GRADIENTS |
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| 417 | // Sobel filter expects a single float at |
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| 418 | // each node |
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| 419 | const int step = 1; |
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[3521] | 420 | float *cdata = new float[npts * step]; |
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[3503] | 421 | #else // !FILTER_GRADIENTS |
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| 422 | // Leave 3 floats of space for gradients |
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| 423 | // to be filled in by computeSimpleGradient() |
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| 424 | const int step = 4; |
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[3521] | 425 | data = new float[npts * step]; |
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[3503] | 426 | #endif // FILTER_GRADIENTS |
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| 427 | |
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| 428 | for (int iz = 0; iz < nz; iz++) { |
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| 429 | double zval = z0 + iz*dz; |
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| 430 | for (int iy = 0; iy < ny; iy++) { |
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| 431 | double yval = y0 + iy*dy; |
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| 432 | for (int ix = 0; ix < nx; ix++) { |
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| 433 | double xval = x0 + ix*dx; |
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| 434 | double v = field.value(xval, yval, zval); |
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| 435 | #ifdef notdef |
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| 436 | if (isnan(v)) { |
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| 437 | TRACE("NAN at %d,%d,%d: (%g, %g, %g)", ix, iy, iz, xval, yval, zval); |
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| 438 | } |
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| 439 | #endif |
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| 440 | if (v != 0.0 && v < nzero_min) { |
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| 441 | nzero_min = v; |
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| 442 | } |
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| 443 | #ifdef FILTER_GRADIENTS |
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[3574] | 444 | // NOT normalized, may have NaNs (FIXME: how does gradient filter handle NaN?) |
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[3503] | 445 | cdata[ngen] = v; |
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| 446 | #else // !FILTER_GRADIENTS |
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| 447 | // scale all values [0-1], -1 => out of bounds |
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| 448 | v = (isnan(v)) ? -1.0 : (v - vmin)/dv; |
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| 449 | data[ngen] = v; |
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| 450 | #endif // FILTER_GRADIENTS |
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| 451 | ngen += step; |
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| 452 | } |
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| 453 | } |
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| 454 | } |
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| 455 | #ifdef FILTER_GRADIENTS |
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| 456 | // computeGradient returns a new array with gradients |
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| 457 | // filled in, so data is now 4 floats per node |
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| 458 | data = computeGradient(cdata, nx, ny, nz, |
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| 459 | dx, dy, dz, |
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| 460 | vmin, vmax); |
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| 461 | delete [] cdata; |
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| 462 | #else // !FILTER_GRADIENTS |
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| 463 | computeSimpleGradient(data, nx, ny, nz, |
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| 464 | dx, dy, dz); |
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| 465 | #endif // FILTER_GRADIENTS |
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| 466 | |
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| 467 | #endif // DOWNSAMPLE_DATA |
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| 468 | } else { |
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| 469 | deleteFieldData(fieldData, ftype); |
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[4063] | 470 | ERROR("Unsupported DataSet"); |
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[3503] | 471 | return NULL; |
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| 472 | } |
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| 473 | |
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| 474 | TRACE("nx = %i ny = %i nz = %i", nx, ny, nz); |
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[5549] | 475 | TRACE("x0 = %g y0 = %g z0 = %g", x0, y0, z0); |
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| 476 | TRACE("lx = %g ly = %g lz = %g", lx, ly, lz); |
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| 477 | TRACE("dx = %g dy = %g dz = %g", dx, dy, dz); |
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| 478 | TRACE("dataMin = %g dataMax = %g nzero_min = %g", |
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[3503] | 479 | vmin, vmax, nzero_min); |
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| 480 | |
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[3597] | 481 | volume = NanoVis::loadVolume(tag, nx, ny, nz, 4, data, |
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[3503] | 482 | vmin, vmax, nzero_min); |
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[3597] | 483 | volume->xAxis.setRange(x0, x0 + lx); |
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| 484 | volume->yAxis.setRange(y0, y0 + ly); |
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| 485 | volume->zAxis.setRange(z0, z0 + lz); |
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| 486 | volume->updatePending = true; |
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[3503] | 487 | |
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| 488 | delete [] data; |
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| 489 | |
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[3597] | 490 | return volume; |
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[3503] | 491 | } |
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