1 | |
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2 | /* |
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3 | * ---------------------------------------------------------------------- |
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4 | * RpDxToVtk - |
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5 | * |
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6 | * ====================================================================== |
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7 | * AUTHOR: Michael McLennan, Purdue University |
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8 | * Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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9 | * |
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10 | * See the file "license.terms" for information on usage and |
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11 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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12 | * ====================================================================== |
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13 | */ |
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14 | #include <string.h> |
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15 | #include <stdlib.h> |
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16 | #include <ctype.h> |
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17 | #include <math.h> |
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18 | #include <limits.h> |
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19 | #include <float.h> |
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20 | #include "tcl.h" |
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21 | |
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22 | static INLINE char * |
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23 | SkipSpaces(char *string) |
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24 | { |
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25 | while (isspace(*string)) { |
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26 | string++; |
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27 | } |
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28 | return string; |
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29 | } |
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30 | |
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31 | static INLINE char * |
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32 | GetLine(char **stringPtr, const char *endPtr) |
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33 | { |
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34 | char *line, *p; |
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35 | |
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36 | line = SkipSpaces(*stringPtr); |
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37 | for (p = line; p < endPtr; p++) { |
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38 | if (*p == '\n') { |
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39 | *stringPtr = p + 1; |
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40 | return line; |
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41 | } |
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42 | } |
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43 | *stringPtr = p; |
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44 | return line; |
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45 | } |
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46 | |
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47 | static int |
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48 | GetUniformFieldValues(Tcl_Interp *interp, int nPoints, int *counts, char **stringPtr, |
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49 | const char *endPtr, Tcl_Obj *objPtr) |
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50 | { |
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51 | int i; |
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52 | const char *p; |
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53 | char mesg[2000]; |
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54 | double *array, scale, vmin, vmax; |
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55 | int iX, iY, iZ; |
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56 | |
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57 | p = *stringPtr; |
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58 | array = malloc(sizeof(double) * nPoints); |
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59 | if (array == NULL) { |
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60 | return TCL_ERROR; |
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61 | } |
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62 | vmin = DBL_MAX, vmax = -DBL_MAX; |
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63 | iX = iY = iZ = 0; |
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64 | for (i = 0; i < nPoints; i++) { |
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65 | double value; |
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66 | char *nextPtr; |
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67 | int loc; |
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68 | |
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69 | if (p >= endPtr) { |
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70 | Tcl_AppendResult(interp, "unexpected EOF in reading points", |
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71 | (char *)NULL); |
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72 | return TCL_ERROR; |
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73 | } |
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74 | value = strtod(p, &nextPtr); |
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75 | if (nextPtr == p) { |
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76 | Tcl_AppendResult(interp, "bad value found in reading points", |
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77 | (char *)NULL); |
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78 | return TCL_ERROR; |
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79 | } |
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80 | p = nextPtr; |
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81 | loc = iZ*counts[0]*counts[1] + iY*counts[0] + iX; |
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82 | if (++iZ >= counts[2]) { |
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83 | iZ = 0; |
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84 | if (++iY >= counts[1]) { |
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85 | iY = 0; |
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86 | ++iX; |
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87 | } |
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88 | } |
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89 | array[loc] = value; |
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90 | if (value < vmin) { |
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91 | vmin = value; |
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92 | } |
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93 | if (value > vmax) { |
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94 | vmax = value; |
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95 | } |
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96 | } |
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97 | scale = 1.0 / (vmax - vmin); |
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98 | for (i = 0; i < nPoints; i++) { |
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99 | #ifdef notdef |
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100 | sprintf(mesg, "%g\n", (array[i] - vmin) * scale); |
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101 | #endif |
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102 | sprintf(mesg, "%g\n", array[i]); |
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103 | Tcl_AppendToObj(objPtr, mesg, -1); |
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104 | } |
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105 | free(array); |
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106 | *stringPtr = (char *)p; |
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107 | return TCL_OK; |
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108 | } |
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109 | |
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110 | static int |
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111 | GetCloudFieldValues(Tcl_Interp *interp, int nXYPoints, int nZPoints, char **stringPtr, |
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112 | const char *endPtr, Tcl_Obj *objPtr) |
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113 | { |
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114 | int i; |
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115 | const char *p; |
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116 | char mesg[2000]; |
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117 | double *array, scale, vmin, vmax; |
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118 | int iXY, iZ; |
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119 | int nPoints; |
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120 | |
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121 | nPoints = nXYPoints * nZPoints; |
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122 | |
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123 | p = *stringPtr; |
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124 | array = malloc(sizeof(double) * nPoints); |
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125 | if (array == NULL) { |
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126 | return TCL_ERROR; |
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127 | } |
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128 | vmin = DBL_MAX, vmax = -DBL_MAX; |
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129 | iXY = iZ = 0; |
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130 | for (i = 0; i < nPoints; i++) { |
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131 | double value; |
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132 | char *nextPtr; |
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133 | int loc; |
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134 | |
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135 | if (p >= endPtr) { |
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136 | Tcl_AppendResult(interp, "unexpected EOF in reading points", |
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137 | (char *)NULL); |
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138 | return TCL_ERROR; |
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139 | } |
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140 | value = strtod(p, &nextPtr); |
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141 | if (nextPtr == p) { |
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142 | Tcl_AppendResult(interp, "bad value found in reading points", |
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143 | (char *)NULL); |
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144 | return TCL_ERROR; |
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145 | } |
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146 | p = nextPtr; |
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147 | loc = nXYPoints * iZ + iXY; |
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148 | if (++iZ >= nZPoints) { |
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149 | iZ = 0; |
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150 | ++iXY; |
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151 | } |
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152 | array[loc] = value; |
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153 | if (value < vmin) { |
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154 | vmin = value; |
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155 | } |
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156 | if (value > vmax) { |
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157 | vmax = value; |
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158 | } |
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159 | } |
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160 | scale = 1.0 / (vmax - vmin); |
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161 | for (i = 0; i < nPoints; i++) { |
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162 | #ifdef notdef |
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163 | sprintf(mesg, "%g\n", (array[i] - vmin) * scale); |
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164 | #endif |
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165 | sprintf(mesg, "%g\n", array[i]); |
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166 | Tcl_AppendToObj(objPtr, mesg, -1); |
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167 | } |
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168 | free(array); |
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169 | *stringPtr = (char *)p; |
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170 | return TCL_OK; |
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171 | } |
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172 | |
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173 | static int |
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174 | GetPoints(Tcl_Interp *interp, double *array, int nXYPoints, |
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175 | char **stringPtr, const char *endPtr) |
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176 | { |
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177 | int i; |
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178 | const char *p; |
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179 | |
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180 | p = *stringPtr; |
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181 | if (array == NULL) { |
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182 | return TCL_ERROR; |
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183 | } |
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184 | for (i = 0; i < nXYPoints; i++) { |
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185 | double x, y, z; |
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186 | char *nextPtr; |
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187 | |
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188 | if (p >= endPtr) { |
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189 | Tcl_AppendResult(interp, "unexpected EOF in reading points", |
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190 | (char *)NULL); |
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191 | return TCL_ERROR; |
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192 | } |
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193 | x = strtod(p, &nextPtr); |
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194 | if (nextPtr == p) { |
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195 | Tcl_AppendResult(interp, "bad value found in reading points", |
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196 | (char *)NULL); |
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197 | return TCL_ERROR; |
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198 | } |
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199 | p = nextPtr; |
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200 | y = strtod(p, &nextPtr); |
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201 | if (nextPtr == p) { |
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202 | Tcl_AppendResult(interp, "bad value found in reading points", |
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203 | (char *)NULL); |
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204 | return TCL_ERROR; |
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205 | } |
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206 | p = nextPtr; |
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207 | z = strtod(p, &nextPtr); |
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208 | if (nextPtr == p) { |
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209 | Tcl_AppendResult(interp, "bad value found in reading points", |
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210 | (char *)NULL); |
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211 | return TCL_ERROR; |
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212 | } |
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213 | p = nextPtr; |
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214 | |
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215 | array[i*2 ] = x; |
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216 | array[i*2+1] = y; |
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217 | } |
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218 | |
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219 | *stringPtr = (char *)p; |
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220 | return TCL_OK; |
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221 | } |
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222 | |
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223 | /* |
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224 | * DxToVtk string |
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225 | * |
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226 | * In DX format: |
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227 | * rank 0 means scalars, |
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228 | * rank 1 means vectors, |
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229 | * rank 2 means matrices, |
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230 | * rank 3 means tensors |
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231 | * |
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232 | * For rank 1, shape is a single number equal to the number of dimensions. |
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233 | * e.g. rank 1 shape 3 means a 3-component vector field |
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234 | * |
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235 | */ |
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236 | |
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237 | static int |
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238 | DxToVtkCmd(ClientData clientData, Tcl_Interp *interp, int objc, |
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239 | Tcl_Obj *const *objv) |
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240 | { |
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241 | double *points; |
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242 | Tcl_Obj *objPtr, *pointsObjPtr, *fieldObjPtr; |
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243 | char *p, *pend; |
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244 | char *string; |
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245 | char mesg[2000]; |
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246 | double dx, dy, dz; |
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247 | double origin[3]; |
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248 | int count[3]; |
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249 | int length, nAxes, nPoints, nXYPoints; |
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250 | char *name; |
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251 | int isUniform; |
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252 | int i, iz; |
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253 | |
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254 | name = "myScalars"; |
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255 | nAxes = nPoints = nXYPoints = 0; |
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256 | dx = dy = dz = 0.0; /* Suppress compiler warning. */ |
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257 | origin[0] = origin[1] = origin[2] = 0.0; /* May not have an origin line. */ |
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258 | count[0] = count[1] = count[2] = 0; /* Suppress compiler warning. */ |
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259 | isUniform = 1; /* Default to expecting uniform grid */ |
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260 | |
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261 | if (objc != 2) { |
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262 | Tcl_AppendResult(interp, "wrong # arguments: should be \"", |
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263 | Tcl_GetString(objv[0]), " string\"", (char *)NULL); |
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264 | return TCL_ERROR; |
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265 | } |
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266 | string = Tcl_GetStringFromObj(objv[1], &length); |
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267 | if (strncmp("<ODX>", string, 5) == 0) { |
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268 | string += 5; |
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269 | length -= 5; |
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270 | } |
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271 | pointsObjPtr = Tcl_NewStringObj("", -1); |
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272 | fieldObjPtr = Tcl_NewStringObj("", -1); |
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273 | for (p = string, pend = p + length; p < pend; /*empty*/) { |
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274 | char *line; |
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275 | double ddx, ddy, ddz; |
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276 | |
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277 | line = GetLine(&p, pend); |
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278 | if (line >= pend) { |
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279 | break; /* EOF */ |
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280 | } |
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281 | if ((line[0] == '#') || (line[0] == '\n')) { |
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282 | continue; /* Skip blank or comment lines. */ |
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283 | } |
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284 | if (sscanf(line, "object %*d class gridpositions counts %d %d %d", |
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285 | count, count + 1, count + 2) == 3) { |
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286 | isUniform = 1; |
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287 | if ((count[0] < 0) || (count[1] < 0) || (count[2] < 0)) { |
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288 | sprintf(mesg, "invalid grid size: x=%d, y=%d, z=%d", |
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289 | count[0], count[1], count[2]); |
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290 | Tcl_AppendResult(interp, mesg, (char *)NULL); |
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291 | return TCL_ERROR; |
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292 | } |
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293 | #ifdef notdef |
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294 | fprintf(stderr, "found gridpositions counts %d %d %d\n", |
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295 | count[0], count[1], count[2]); |
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296 | #endif |
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297 | } else if (sscanf(line, "origin %lg %lg %lg", origin, origin + 1, |
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298 | origin + 2) == 3) { |
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299 | /* Found origin. */ |
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300 | #ifdef notdef |
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301 | fprintf(stderr, "found origin %g %g %g\n", |
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302 | origin[0], origin[1], origin[2]); |
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303 | #endif |
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304 | } else if (sscanf(line, "delta %lg %lg %lg", &ddx, &ddy, &ddz) == 3) { |
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305 | if (nAxes == 3) { |
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306 | Tcl_AppendResult(interp, "too many delta statements", |
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307 | (char *)NULL); |
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308 | return TCL_ERROR; |
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309 | } |
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310 | if (ddx != 0.0) { |
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311 | if (ddy != 0.0 || ddz != 0.0) { |
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312 | Tcl_AppendResult(interp, "invalid delta statement", |
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313 | (char *)NULL); |
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314 | return TCL_ERROR; |
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315 | } |
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316 | dx = ddx; |
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317 | } else if (ddy != 0.0) { |
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318 | if (ddx != 0.0 || ddz != 0.0) { |
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319 | Tcl_AppendResult(interp, "invalid delta statement", |
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320 | (char *)NULL); |
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321 | return TCL_ERROR; |
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322 | } |
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323 | dy = ddy; |
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324 | } else if (ddz != 0.0) { |
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325 | if (ddx != 0.0 || ddy != 0.0) { |
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326 | Tcl_AppendResult(interp, "invalid delta statement", |
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327 | (char *)NULL); |
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328 | return TCL_ERROR; |
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329 | } |
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330 | dz = ddz; |
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331 | } |
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332 | nAxes++; |
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333 | #ifdef notdef |
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334 | fprintf(stderr, "found delta %g %g %g\n", ddx, ddy, ddx); |
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335 | #endif |
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336 | } else if (sscanf(line, "object %*d class regulararray count %d", |
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337 | &count[2]) == 1) { |
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338 | // Z grid |
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339 | } else if (sscanf(line, "object %*d class array type %*s rank 1 shape 3" |
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340 | " items %d data follows", &nXYPoints) == 1) { |
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341 | // This is a 2D point cloud in xy with a uniform zgrid |
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342 | isUniform = 0; |
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343 | #ifdef notdef |
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344 | fprintf(stderr, "found class array type shape 3 nPoints=%d\n", |
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345 | nPoints); |
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346 | #endif |
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347 | if (nXYPoints < 0) { |
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348 | sprintf(mesg, "bad # points %d", nXYPoints); |
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349 | Tcl_AppendResult(interp, mesg, (char *)NULL); |
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350 | return TCL_ERROR; |
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351 | } |
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352 | points = malloc(sizeof(double) * nXYPoints * 2); |
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353 | if (GetPoints(interp, points, nXYPoints, &p, pend) != TCL_OK) { |
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354 | return TCL_ERROR; |
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355 | } |
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356 | } else if (sscanf(line, "object %*d class array type %*s rank 0" |
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357 | " %*s %d data follows", &nPoints) == 1) { |
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358 | #ifdef notdef |
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359 | fprintf(stderr, "found class array type rank 0 nPoints=%d\n", |
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360 | nPoints); |
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361 | #endif |
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362 | if (isUniform && nPoints != count[0]*count[1]*count[2]) { |
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363 | sprintf(mesg, "inconsistent data: expected %d points" |
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364 | " but found %d points", count[0]*count[1]*count[2], |
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365 | nPoints); |
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366 | Tcl_AppendResult(interp, mesg, (char *)NULL); |
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367 | return TCL_ERROR; |
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368 | } else if (!isUniform && nPoints != nXYPoints * count[2]) { |
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369 | sprintf(mesg, "inconsistent data: expected %d points" |
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370 | " but found %d points", nXYPoints * count[2], |
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371 | nPoints); |
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372 | Tcl_AppendResult(interp, mesg, (char *)NULL); |
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373 | return TCL_ERROR; |
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374 | } |
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375 | if (isUniform) { |
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376 | if (GetUniformFieldValues(interp, nPoints, count, &p, pend, fieldObjPtr) |
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377 | != TCL_OK) { |
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378 | return TCL_ERROR; |
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379 | } |
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380 | } else { |
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381 | if (GetCloudFieldValues(interp, nXYPoints, count[2], &p, pend, fieldObjPtr) |
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382 | != TCL_OK) { |
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383 | return TCL_ERROR; |
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384 | } |
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385 | } |
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386 | #ifdef notdef |
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387 | } else { |
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388 | fprintf(stderr, "unknown line (%.80s)\n", line); |
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389 | #endif |
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390 | } |
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391 | } |
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392 | |
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393 | if (isUniform) { |
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394 | objPtr = Tcl_NewStringObj("# vtk DataFile Version 2.0\n", -1); |
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395 | Tcl_AppendToObj(objPtr, "Converted from DX file\n", -1); |
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396 | Tcl_AppendToObj(objPtr, "ASCII\n", -1); |
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397 | Tcl_AppendToObj(objPtr, "DATASET STRUCTURED_POINTS\n", -1); |
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398 | sprintf(mesg, "DIMENSIONS %d %d %d\n", count[0], count[1], count[2]); |
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399 | Tcl_AppendToObj(objPtr, mesg, -1); |
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400 | sprintf(mesg, "ORIGIN %g %g %g\n", origin[0], origin[1], origin[2]); |
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401 | Tcl_AppendToObj(objPtr, mesg, -1); |
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402 | sprintf(mesg, "SPACING %g %g %g\n", dx, dy, dz); |
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403 | Tcl_AppendToObj(objPtr, mesg, -1); |
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404 | sprintf(mesg, "POINT_DATA %d\n", nPoints); |
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405 | Tcl_AppendToObj(objPtr, mesg, -1); |
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406 | sprintf(mesg, "SCALARS %s double 1\n", name); |
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407 | Tcl_AppendToObj(objPtr, mesg, -1); |
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408 | sprintf(mesg, "LOOKUP_TABLE default\n"); |
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409 | Tcl_AppendToObj(objPtr, mesg, -1); |
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410 | Tcl_AppendObjToObj(objPtr, fieldObjPtr); |
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411 | } else { |
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412 | /* Fill points. Have to wait to do this since origin, delta can come after |
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413 | * the point list in the file. |
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414 | */ |
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415 | for (iz = 0; iz < count[2]; iz++) { |
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416 | for (i = 0; i < nXYPoints; i++) { |
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417 | sprintf(mesg, "%g %g %g\n", points[i*2], points[i*2+1], origin[2] + dz * iz); |
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418 | Tcl_AppendToObj(pointsObjPtr, mesg, -1); |
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419 | } |
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420 | } |
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421 | free(points); |
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422 | |
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423 | objPtr = Tcl_NewStringObj("# vtk DataFile Version 2.0\n", -1); |
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424 | Tcl_AppendToObj(objPtr, "Converted from DX file\n", -1); |
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425 | Tcl_AppendToObj(objPtr, "ASCII\n", -1); |
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426 | Tcl_AppendToObj(objPtr, "DATASET UNSTRUCTURED_GRID\n", -1); |
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427 | sprintf(mesg, "POINTS %d double\n", nPoints); |
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428 | Tcl_AppendToObj(objPtr, mesg, -1); |
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429 | Tcl_AppendObjToObj(objPtr, pointsObjPtr); |
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430 | sprintf(mesg, "POINT_DATA %d\n", nPoints); |
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431 | Tcl_AppendToObj(objPtr, mesg, -1); |
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432 | sprintf(mesg, "SCALARS %s double 1\n", name); |
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433 | Tcl_AppendToObj(objPtr, mesg, -1); |
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434 | sprintf(mesg, "LOOKUP_TABLE default\n"); |
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435 | Tcl_AppendToObj(objPtr, mesg, -1); |
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436 | Tcl_AppendObjToObj(objPtr, fieldObjPtr); |
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437 | } |
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438 | |
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439 | Tcl_DecrRefCount(pointsObjPtr); |
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440 | Tcl_DecrRefCount(fieldObjPtr); |
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441 | Tcl_SetObjResult(interp, objPtr); |
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442 | return TCL_OK; |
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443 | } |
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444 | |
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445 | /* |
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446 | * ------------------------------------------------------------------------ |
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447 | * RpDxToVtk_Init -- |
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448 | * |
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449 | * Invoked when the Rappture GUI library is being initialized |
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450 | * to install the "DxToVtk" command into the interpreter. |
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451 | * |
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452 | * Returns TCL_OK if successful, or TCL_ERROR (along with an error |
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453 | * message in the interp) if anything goes wrong. |
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454 | * ------------------------------------------------------------------------ |
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455 | */ |
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456 | int |
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457 | RpDxToVtk_Init(Tcl_Interp *interp) |
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458 | { |
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459 | /* install the widget command */ |
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460 | Tcl_CreateObjCommand(interp, "Rappture::DxToVtk", DxToVtkCmd, |
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461 | NULL, NULL); |
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462 | return TCL_OK; |
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463 | } |
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