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 <RpOutcome.h> |
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11 | #include <RpField1D.h> |
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12 | #include <RpFieldRect3D.h> |
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13 | |
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14 | #include <vrmath/Vector3f.h> |
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15 | |
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16 | #include "ReaderCommon.h" |
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17 | |
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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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23 | enum FieldType { |
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24 | FLOAT, |
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25 | DOUBLE, |
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26 | UCHAR, |
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27 | SHORT, |
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28 | USHORT, |
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29 | INT, |
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30 | UINT |
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31 | }; |
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32 | |
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33 | static inline int typeSize(FieldType type) |
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34 | { |
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35 | switch (type) { |
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36 | case FLOAT: |
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37 | return sizeof(float); |
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38 | case DOUBLE: |
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39 | return sizeof(double); |
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40 | case UCHAR: |
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41 | return sizeof(unsigned char); |
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42 | case SHORT: |
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43 | return sizeof(short); |
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44 | case USHORT: |
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45 | return sizeof(unsigned short); |
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46 | case INT: |
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47 | return sizeof(int); |
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48 | case UINT: |
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49 | return sizeof(unsigned int); |
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50 | default: |
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51 | return 0; |
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52 | } |
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53 | } |
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54 | |
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55 | static inline void allocFieldData(void **data, int npts, FieldType type) |
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56 | { |
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57 | switch (type) { |
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58 | case FLOAT: |
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59 | *data = (float *)(new float[npts]); |
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60 | break; |
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61 | case DOUBLE: |
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62 | *data = (double *)(new double[npts]); |
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63 | break; |
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64 | case UCHAR: |
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65 | *data = (unsigned char *)(new unsigned char[npts]); |
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66 | break; |
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67 | case SHORT: |
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68 | *data = (short *)(new short[npts]); |
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69 | break; |
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70 | case USHORT: |
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71 | *data = (unsigned short *)(new unsigned short[npts]); |
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72 | break; |
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73 | case INT: |
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74 | *data = (int *)(new int[npts]); |
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75 | break; |
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76 | case UINT: |
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77 | *data = (unsigned int *)(new unsigned int[npts]); |
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78 | break; |
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79 | default: |
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80 | ; |
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81 | } |
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82 | } |
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83 | |
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84 | static inline void readFieldValue(void *data, int idx, FieldType type, std::iostream& fin) |
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85 | { |
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86 | switch (type) { |
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87 | case FLOAT: { |
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88 | float val; |
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89 | fin >> val; |
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90 | ((float *)data)[idx] = val; |
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91 | } |
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92 | break; |
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93 | case DOUBLE: { |
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94 | double val; |
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95 | fin >> val; |
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96 | ((double *)data)[idx] = val; |
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97 | } |
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98 | break; |
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99 | case SHORT: { |
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100 | short val; |
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101 | fin >> val; |
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102 | ((short *)data)[idx] = val; |
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103 | } |
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104 | break; |
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105 | case USHORT: { |
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106 | unsigned short val; |
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107 | fin >> val; |
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108 | ((unsigned short *)data)[idx] = val; |
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109 | } |
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110 | break; |
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111 | case INT: { |
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112 | int val; |
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113 | fin >> val; |
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114 | ((int *)data)[idx] = val; |
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115 | } |
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116 | break; |
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117 | case UINT: { |
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118 | unsigned int val; |
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119 | fin >> val; |
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120 | ((unsigned int *)data)[idx] = val; |
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121 | } |
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122 | break; |
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123 | default: |
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124 | break; |
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125 | } |
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126 | |
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127 | } |
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128 | |
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129 | static inline float getFieldData(void *data, int i, FieldType type) |
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130 | { |
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131 | switch (type) { |
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132 | case FLOAT: |
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133 | return ((float *)data)[i]; |
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134 | case DOUBLE: |
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135 | return (float)((double *)data)[i]; |
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136 | case UCHAR: |
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137 | return ((float)((unsigned char *)data)[i]); |
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138 | case SHORT: |
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139 | return (float)((short *)data)[i]; |
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140 | case USHORT: |
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141 | return (float)((unsigned short *)data)[i]; |
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142 | case INT: |
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143 | return (float)((int *)data)[i]; |
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144 | case UINT: |
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145 | return (float)((unsigned int *)data)[i]; |
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146 | default: |
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147 | return 0.0f; |
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148 | } |
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149 | } |
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150 | |
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151 | static inline void deleteFieldData(void *data, FieldType type) |
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152 | { |
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153 | if (data == NULL) |
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154 | return; |
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155 | switch (type) { |
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156 | case FLOAT: |
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157 | delete [] ((float *)data); |
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158 | break; |
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159 | case DOUBLE: |
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160 | delete [] ((double *)data); |
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161 | break; |
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162 | case UCHAR: |
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163 | delete [] ((unsigned char *)data); |
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164 | break; |
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165 | case SHORT: |
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166 | delete [] ((short *)data); |
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167 | break; |
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168 | case USHORT: |
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169 | delete [] ((unsigned short *)data); |
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170 | break; |
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171 | case INT: |
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172 | delete [] ((int *)data); |
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173 | break; |
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174 | case UINT: |
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175 | delete [] ((unsigned int *)data); |
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176 | break; |
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177 | default: |
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178 | ; |
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179 | } |
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180 | } |
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181 | |
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182 | Volume * |
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183 | load_vtk_volume_stream(Rappture::Outcome& result, const char *tag, std::iostream& fin) |
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184 | { |
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185 | TRACE("Enter tag:%s", tag); |
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186 | |
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187 | int nx, ny, nz, npts; |
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188 | // origin |
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189 | double x0, y0, z0; |
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190 | // deltas (cell dimensions) |
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191 | double dx, dy, dz; |
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192 | // length of volume edges |
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193 | double lx, ly, lz; |
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194 | char line[128], str[128], type[128], *start; |
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195 | int isBinary = -1; |
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196 | int isRect = -1; |
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197 | FieldType ftype = DOUBLE; |
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198 | void *fieldData = NULL; |
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199 | int numRead = 0; |
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200 | |
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201 | dx = dy = dz = 0.0; |
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202 | x0 = y0 = z0 = 0.0; |
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203 | nx = ny = nz = npts = 0; |
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204 | while (!fin.eof()) { |
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205 | fin.getline(line, sizeof(line) - 1); |
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206 | if (fin.fail()) { |
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207 | result.error("Error in data stream"); |
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208 | return NULL; |
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209 | } |
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210 | for (start = line; *start == ' ' || *start == '\t'; start++) |
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211 | ; // skip leading blanks |
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212 | |
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213 | if (*start != '#') { // skip comment lines |
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214 | if (strncmp(start, "BINARY", 6) == 0) { |
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215 | isBinary = 1; |
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216 | } else if (strncmp(start, "ASCII", 5) == 0) { |
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217 | isBinary = 0; |
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218 | } else if (sscanf(start, "DATASET %s", str) == 1) { |
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219 | if (strncmp(str, "STRUCTURED_POINTS", 17) == 0) { |
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220 | isRect = 1; |
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221 | } else { |
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222 | result.addError("Unsupported DataSet type '%s'", str); |
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223 | return NULL; |
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224 | } |
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225 | } else if (sscanf(start, "DIMENSIONS %d %d %d", &nx, &ny, &nz) == 3) { |
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226 | if (nx <= 0 || ny <= 0 || nz <= 0) { |
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227 | result.error("Found non-positive dimensions"); |
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228 | return NULL; |
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229 | } |
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230 | // found dimensions |
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231 | } else if (sscanf(start, "ORIGIN %lg %lg %lg", &x0, &y0, &z0) == 3) { |
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232 | // found origin |
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233 | } else if (sscanf(start, "SPACING %lg %lg %lg", &dx, &dy, &dz) == 3) { |
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234 | if ((nx > 1 && dx == 0.0) || (ny > 1 && dy == 0.0) || (nz > 1 && dz == 0.0)) { |
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235 | result.error("Found zero spacing for dimension"); |
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236 | return NULL; |
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237 | } |
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238 | // found cell spacing |
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239 | } else if (sscanf(start, "POINT_DATA %d", &npts) == 1) { |
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240 | if (npts < 1 || npts != nx * ny * nz) { |
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241 | result.addError("Error in data stream: unexpected number of point data: %d", npts); |
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242 | return NULL; |
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243 | } |
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244 | if (isBinary < 0 || fin.eof()) { |
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245 | // Should know if ASCII or BINARY by now |
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246 | result.error("Error in data stream"); |
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247 | return NULL; |
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248 | } |
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249 | fin.getline(line, sizeof(line) - 1); |
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250 | if (fin.fail()) { |
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251 | result.error("Error in data stream"); |
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252 | return NULL; |
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253 | } |
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254 | for (start = line; *start == ' ' || *start == '\t'; start++) |
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255 | ; // skip leading blanks |
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256 | if (sscanf(start, "SCALARS %s %s", str, type) != 2) { |
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257 | result.error("Error in data stream"); |
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258 | return NULL; |
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259 | } |
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260 | if (strncmp(type, "double", 6) == 0) { |
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261 | ftype = DOUBLE; |
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262 | } else if (strncmp(type, "float", 5) == 0) { |
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263 | ftype = FLOAT; |
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264 | } else if (strncmp(type, "unsigned_char", 13) == 0) { |
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265 | ftype = UCHAR; |
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266 | if (!isBinary) { |
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267 | result.addError("unsigned char only supported in binary VTK files"); |
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268 | return NULL; |
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269 | } |
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270 | } else if (strncmp(type, "short", 5) == 0) { |
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271 | ftype = SHORT; |
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272 | } else if (strncmp(type, "unsigned_short", 14) == 0) { |
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273 | ftype = USHORT; |
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274 | } else if (strncmp(type, "int", 3) == 0) { |
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275 | ftype = INT; |
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276 | } else if (strncmp(type, "unsigned_int", 12) == 0) { |
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277 | ftype = UINT; |
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278 | } else { |
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279 | result.addError("Unsupported scalar type: '%s'", type); |
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280 | return NULL; |
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281 | } |
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282 | if (fin.eof()) { |
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283 | result.error("Error in data stream"); |
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284 | return NULL; |
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285 | } |
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286 | fin.getline(line, sizeof(line) - 1); |
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287 | if (fin.fail()) { |
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288 | result.error("Error in data stream"); |
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289 | return NULL; |
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290 | } |
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291 | for (start = line; *start == ' ' || *start == '\t'; start++) |
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292 | ; // skip leading blanks |
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293 | if (sscanf(start, "LOOKUP_TABLE %s", str) == 1) { |
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294 | // skip lookup table, but don't read ahead |
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295 | if (fin.eof()) { |
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296 | result.error("Error in data stream"); |
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297 | return NULL; |
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298 | } |
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299 | } else { |
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300 | // Lookup table line is required |
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301 | result.error("Missing LOOKUP_TABLE"); |
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302 | return NULL; |
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303 | } |
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304 | // found start of field data |
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305 | allocFieldData(&fieldData, npts, ftype); |
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306 | if (isBinary) { |
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307 | fin.read((char *)fieldData, npts * typeSize(ftype)); |
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308 | if (fin.fail()) { |
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309 | deleteFieldData(fieldData, ftype); |
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310 | result.error("Error in data stream"); |
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311 | return NULL; |
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312 | } |
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313 | numRead = npts; |
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314 | } else { |
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315 | numRead = 0; |
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316 | while (!fin.eof() && numRead < npts) { |
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317 | readFieldValue(fieldData, numRead++, ftype, fin); |
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318 | if (fin.fail()) { |
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319 | deleteFieldData(fieldData, ftype); |
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320 | result.error("Error in data stream"); |
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321 | return NULL; |
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322 | } |
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323 | } |
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324 | } |
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325 | |
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326 | break; |
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327 | } |
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328 | } |
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329 | } |
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330 | |
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331 | if (isRect < 0 || numRead != npts || npts < 1) { |
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332 | deleteFieldData(fieldData, ftype); |
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333 | result.error("Error in data stream"); |
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334 | return NULL; |
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335 | } |
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336 | |
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337 | TRACE("found nx=%d ny=%d nz=%d\ndx=%f dy=%f dz=%f\nx0=%f y0=%f z0=%f", |
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338 | nx, ny, nz, dx, dy, dz, x0, y0, z0); |
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339 | |
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340 | lx = (nx - 1) * dx; |
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341 | ly = (ny - 1) * dy; |
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342 | lz = (nz - 1) * dz; |
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343 | |
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344 | Volume *volume = NULL; |
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345 | double vmin = DBL_MAX; |
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346 | double nzero_min = DBL_MAX; |
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347 | double vmax = -DBL_MAX; |
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348 | float *data = NULL; |
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349 | |
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350 | if (isRect) { |
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351 | #ifdef DOWNSAMPLE_DATA |
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352 | Rappture::Mesh1D xgrid(x0, x0 + lx, nx); |
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353 | Rappture::Mesh1D ygrid(y0, y0 + ly, ny); |
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354 | Rappture::Mesh1D zgrid(z0, z0 + lz, nz); |
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355 | Rappture::FieldRect3D field(xgrid, ygrid, zgrid); |
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356 | #else // !DOWNSAMPLE_DATA |
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357 | data = new float[npts * 4]; |
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358 | memset(data, 0, npts * 4); |
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359 | #endif // DOWNSAMPLE_DATA |
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360 | for (int p = 0; p < npts; p++) { |
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361 | #ifdef DOWNSAMPLE_DATA |
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362 | field.define(p, getFieldData(fieldData, p, ftype)); |
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363 | #else // !DOWNSAMPLE_DATA |
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364 | int nindex = p * 4; |
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365 | data[nindex] = getFieldData(fieldData, p, ftype); |
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366 | if (data[nindex] < vmin) { |
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367 | vmin = data[nindex]; |
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368 | } else if (data[nindex] > vmax) { |
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369 | vmax = data[nindex]; |
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370 | } |
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371 | if (data[nindex] != 0.0 && data[nindex] < nzero_min) { |
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372 | nzero_min = data[nindex]; |
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373 | } |
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374 | #endif // DOWNSAMPLE_DATA |
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375 | } |
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376 | |
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377 | deleteFieldData(fieldData, ftype); |
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378 | |
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379 | #ifndef DOWNSAMPLE_DATA |
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380 | |
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381 | // scale all values [0-1], -1 => out of bounds |
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382 | normalizeScalar(data, npts, 4, vmin, vmax); |
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383 | computeSimpleGradient(data, nx, ny, nz, |
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384 | dx, dy, dz); |
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385 | #else // DOWNSAMPLE_DATA |
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386 | // figure out a good mesh spacing |
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387 | int nsample = 64; |
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388 | double dmin = pow((lx*ly*lz)/((nsample-1)*(nsample-1)*(nsample-1)), 0.333); |
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389 | |
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390 | nx = (int)ceil(lx/dmin) + 1; |
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391 | ny = (int)ceil(ly/dmin) + 1; |
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392 | nz = (int)ceil(lz/dmin) + 1; |
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393 | |
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394 | #ifndef HAVE_NPOT_TEXTURES |
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395 | // must be an even power of 2 for older cards |
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396 | nx = (int)pow(2.0, ceil(log10((double)nx)/log10(2.0))); |
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397 | ny = (int)pow(2.0, ceil(log10((double)ny)/log10(2.0))); |
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398 | nz = (int)pow(2.0, ceil(log10((double)nz)/log10(2.0))); |
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399 | #endif |
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400 | |
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401 | dx = lx /(double)(nx - 1); |
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402 | dy = ly /(double)(ny - 1); |
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403 | dz = lz /(double)(nz - 1); |
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404 | |
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405 | vmin = field.valueMin(); |
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406 | vmax = field.valueMax(); |
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407 | nzero_min = DBL_MAX; |
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408 | double dv = vmax - vmin; |
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409 | if (dv == 0.0) { |
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410 | dv = 1.0; |
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411 | } |
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412 | |
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413 | int ngen = 0; |
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414 | #ifdef FILTER_GRADIENTS |
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415 | // Sobel filter expects a single float at |
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416 | // each node |
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417 | const int step = 1; |
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418 | float *cdata = new float[npts * step]; |
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419 | #else // !FILTER_GRADIENTS |
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420 | // Leave 3 floats of space for gradients |
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421 | // to be filled in by computeSimpleGradient() |
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422 | const int step = 4; |
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423 | data = new float[npts * step]; |
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424 | #endif // FILTER_GRADIENTS |
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425 | |
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426 | for (int iz = 0; iz < nz; iz++) { |
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427 | double zval = z0 + iz*dz; |
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428 | for (int iy = 0; iy < ny; iy++) { |
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429 | double yval = y0 + iy*dy; |
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430 | for (int ix = 0; ix < nx; ix++) { |
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431 | double xval = x0 + ix*dx; |
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432 | double v = field.value(xval, yval, zval); |
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433 | #ifdef notdef |
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434 | if (isnan(v)) { |
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435 | TRACE("NAN at %d,%d,%d: (%g, %g, %g)", ix, iy, iz, xval, yval, zval); |
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436 | } |
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437 | #endif |
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438 | if (v != 0.0 && v < nzero_min) { |
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439 | nzero_min = v; |
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440 | } |
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441 | #ifdef FILTER_GRADIENTS |
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442 | // NOT normalized, may have NaNs (FIXME: how does gradient filter handle NaN?) |
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443 | cdata[ngen] = v; |
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444 | #else // !FILTER_GRADIENTS |
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445 | // scale all values [0-1], -1 => out of bounds |
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446 | v = (isnan(v)) ? -1.0 : (v - vmin)/dv; |
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447 | data[ngen] = v; |
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448 | #endif // FILTER_GRADIENTS |
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449 | ngen += step; |
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450 | } |
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451 | } |
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452 | } |
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453 | #ifdef FILTER_GRADIENTS |
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454 | // computeGradient returns a new array with gradients |
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455 | // filled in, so data is now 4 floats per node |
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456 | data = computeGradient(cdata, nx, ny, nz, |
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457 | dx, dy, dz, |
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458 | vmin, vmax); |
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459 | delete [] cdata; |
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460 | #else // !FILTER_GRADIENTS |
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461 | computeSimpleGradient(data, nx, ny, nz, |
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462 | dx, dy, dz); |
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463 | #endif // FILTER_GRADIENTS |
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464 | |
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465 | #endif // DOWNSAMPLE_DATA |
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466 | } else { |
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467 | deleteFieldData(fieldData, ftype); |
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468 | result.error("Unsupported DataSet"); |
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469 | return NULL; |
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470 | } |
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471 | |
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472 | TRACE("nx = %i ny = %i nz = %i", nx, ny, nz); |
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473 | TRACE("x0 = %lg y0 = %lg z0 = %lg", x0, y0, z0); |
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474 | TRACE("lx = %lg ly = %lg lz = %lg", lx, ly, lz); |
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475 | TRACE("dx = %lg dy = %lg dz = %lg", dx, dy, dz); |
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476 | TRACE("dataMin = %lg dataMax = %lg nzero_min = %lg", |
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477 | vmin, vmax, nzero_min); |
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478 | |
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479 | volume = NanoVis::loadVolume(tag, nx, ny, nz, 4, data, |
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480 | vmin, vmax, nzero_min); |
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481 | volume->xAxis.setRange(x0, x0 + lx); |
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482 | volume->yAxis.setRange(y0, y0 + ly); |
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483 | volume->zAxis.setRange(z0, z0 + lz); |
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484 | volume->updatePending = true; |
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485 | |
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486 | delete [] data; |
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487 | |
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488 | // |
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489 | // Center this new volume on the origin. |
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490 | // |
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491 | float dx0 = -0.5; |
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492 | float dy0 = -0.5*ly/lx; |
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493 | float dz0 = -0.5*lz/lx; |
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494 | if (volume) { |
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495 | volume->location(vrmath::Vector3f(dx0, dy0, dz0)); |
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496 | TRACE("Set volume location to %g %g %g", dx0, dy0, dz0); |
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497 | } |
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498 | return volume; |
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499 | } |
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