1 | /* |
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2 | |
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3 | Brian Curless |
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4 | |
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5 | Computer Graphics Laboratory |
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6 | Stanford University |
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7 | |
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8 | --------------------------------------------------------------------- |
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9 | |
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10 | Copyright (1997) The Board of Trustees of the Leland Stanford Junior |
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11 | University. Except for commercial resale, lease, license or other |
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12 | commercial transactions, permission is hereby given to use, copy, |
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13 | modify this software for academic purposes only. No part of this |
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14 | software or any derivatives thereof may be used in the production of |
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15 | computer models for resale or for use in a commercial |
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16 | product. STANFORD MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND |
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17 | CONCERNING THIS SOFTWARE. No support is implied or provided. |
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18 | |
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19 | */ |
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20 | |
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21 | |
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22 | #include <limits.h> |
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23 | #include <stdio.h> |
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24 | #include <unistd.h> |
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25 | #include <assert.h> |
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26 | |
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27 | #include "OccGridNormRLE.h" |
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28 | |
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29 | OccGridNormRLE::OccGridNormRLE() |
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30 | { |
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31 | this->xdim = this->ydim = this->zdim = 0; |
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32 | this->axis = Z_AXIS; |
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33 | this->flip = FALSE; |
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34 | this->origin[0] = 0; |
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35 | this->origin[1] = 0; |
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36 | this->origin[2] = 0; |
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37 | |
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38 | this->lengthChunker = NULL; |
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39 | this->elementChunker = NULL; |
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40 | |
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41 | this->rleScanline = new OccScanlineNormRLE; |
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42 | |
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43 | this->defaultElement = new OccNormElement; |
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44 | this->defaultElement->value = 0; |
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45 | this->defaultElement->totalWeight = 0; |
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46 | this->defaultElement->nx = 0; |
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47 | this->defaultElement->ny = 0; |
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48 | this->defaultElement->nz = 0; |
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49 | //this->defaultElement->more = FALSE; |
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50 | } |
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51 | |
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52 | |
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53 | OccGridNormRLE::OccGridNormRLE(int xd, int yd, int zd, int num) |
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54 | { |
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55 | this->xdim = this->ydim = this->zdim = 0; |
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56 | this->axis = Z_AXIS; |
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57 | this->flip = FALSE; |
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58 | this->origin[0] = 0; |
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59 | this->origin[1] = 0; |
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60 | this->origin[2] = 0; |
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61 | |
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62 | this->rleScanline = new OccScanlineNormRLE; |
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63 | |
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64 | this->defaultElement = new OccNormElement; |
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65 | this->defaultElement->value = 0; |
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66 | this->defaultElement->totalWeight = 0; |
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67 | this->defaultElement->nx = 0; |
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68 | this->defaultElement->ny = 0; |
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69 | this->defaultElement->nz = 0; |
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70 | //this->defaultElement->more = FALSE; |
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71 | |
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72 | this->lengthChunker = NULL; |
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73 | this->elementChunker = NULL; |
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74 | |
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75 | this->init(xd, yd, zd, num); |
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76 | } |
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77 | |
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78 | |
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79 | void |
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80 | OccGridNormRLE::init(int xd, int yd, int zd, int num) |
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81 | { |
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82 | int size1, size2, size3, sliceSize; |
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83 | |
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84 | this->xdim = xd; |
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85 | this->ydim = yd; |
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86 | this->zdim = zd; |
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87 | |
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88 | int maxdim = MAX(this->xdim, MAX(this->ydim, this->zdim)); |
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89 | this->sliceOrigins = new vec3f[maxdim]; |
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90 | this->scanline = new OccNormElement[maxdim]; |
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91 | |
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92 | this->axis = Z_AXIS; |
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93 | this->flip = FALSE; |
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94 | this->origin[0] = 0; |
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95 | this->origin[1] = 0; |
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96 | this->origin[2] = 0; |
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97 | |
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98 | size1 = xd*yd; |
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99 | size2 = xd*zd; |
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100 | size3 = yd*zd; |
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101 | |
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102 | sliceSize = MAX(MAX(size1, size2), size3); |
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103 | this->slice = new OccNormElement[sliceSize]; |
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104 | |
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105 | this->rleScanline = new OccScanlineNormRLE; |
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106 | |
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107 | this->defaultElement = new OccNormElement; |
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108 | this->defaultElement->value = 0; |
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109 | this->defaultElement->totalWeight = 0; |
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110 | this->defaultElement->nx = 0; |
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111 | this->defaultElement->ny = 0; |
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112 | this->defaultElement->nz = 0; |
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113 | //this->defaultElement->more = FALSE; |
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114 | |
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115 | this->lengthAddr = new RunLength*[sliceSize]; |
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116 | this->elementAddr = new OccNormElement*[sliceSize]; |
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117 | |
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118 | if (this->lengthChunker == NULL) |
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119 | this->lengthChunker = new ChunkAllocator(num); |
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120 | else if (this->lengthChunker->chunkSize != num) { |
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121 | delete this->lengthChunker; |
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122 | this->lengthChunker = new ChunkAllocator(num); |
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123 | } else { |
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124 | this->lengthChunker->reset(); |
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125 | } |
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126 | |
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127 | if (this->elementChunker == NULL) |
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128 | this->elementChunker = new ChunkAllocator(num); |
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129 | else if (this->elementChunker->chunkSize != num) { |
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130 | delete this->elementChunker; |
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131 | this->elementChunker = new ChunkAllocator(num); |
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132 | } else { |
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133 | this->elementChunker->reset(); |
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134 | } |
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135 | |
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136 | |
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137 | // Compute the maximum bytes needed for a scanline |
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138 | // Fix this!! |
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139 | if (sizeof(OccNormElement) >= 2*sizeof(ushort)) { |
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140 | this->transpXZbytesPerScanline = |
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141 | this->xdim*sizeof(OccNormElement)+3*sizeof(ushort); |
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142 | } |
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143 | else { |
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144 | this->transpXZbytesPerScanline = |
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145 | this->xdim/2* |
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146 | (sizeof(OccNormElement)+2*sizeof(ushort)) + sizeof(ushort); |
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147 | } |
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148 | |
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149 | this->transpXZslice = new uchar[this->zdim*this->transpXZbytesPerScanline]; |
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150 | |
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151 | this->clear(); |
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152 | } |
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153 | |
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154 | |
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155 | OccGridNormRLE::~OccGridNormRLE() |
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156 | { |
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157 | this->freeSpace(); |
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158 | } |
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159 | |
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160 | |
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161 | void |
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162 | OccGridNormRLE::freeSpace() |
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163 | { |
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164 | if (this->sliceOrigins != NULL) { |
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165 | delete [] this->sliceOrigins; |
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166 | } |
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167 | if (this->lengthAddr != NULL) { |
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168 | delete [] this->lengthAddr; |
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169 | } |
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170 | if (this->elementAddr != NULL) { |
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171 | delete [] this->elementAddr; |
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172 | } |
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173 | if (this->slice != NULL) { |
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174 | delete [] this->slice; |
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175 | } |
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176 | if (this->scanline != NULL) { |
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177 | delete [] this->scanline; |
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178 | } |
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179 | if (this->rleScanline != NULL) { |
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180 | delete this->rleScanline; |
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181 | } |
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182 | if (this->defaultElement != NULL) { |
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183 | delete this->defaultElement; |
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184 | } |
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185 | if (this->elementChunker != NULL) { |
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186 | delete this->elementChunker; |
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187 | } |
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188 | if (this->lengthChunker != NULL) { |
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189 | delete this->lengthChunker; |
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190 | } |
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191 | if (this->transpXZslice != NULL) { |
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192 | delete [] this->transpXZslice; |
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193 | } |
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194 | } |
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195 | |
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196 | |
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197 | void |
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198 | OccGridNormRLE::copyParams(OccGridNormRLE *other) |
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199 | { |
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200 | this->xdim = other->xdim; |
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201 | this->ydim = other->ydim; |
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202 | this->zdim = other->zdim; |
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203 | this->axis = other->axis; |
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204 | this->flip = other->flip; |
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205 | this->origin[0] = other->origin[0]; |
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206 | this->origin[1] = other->origin[1]; |
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207 | this->origin[2] = other->origin[2]; |
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208 | } |
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209 | |
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210 | |
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211 | void |
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212 | OccGridNormRLE::allocNewRun(int y, int z) |
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213 | { |
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214 | // Make room for contiguous runs and point the length and data |
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215 | // pointers to the next place that length and data will be put |
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216 | |
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217 | this->elementChunker->newChunkIfNeeded(sizeof(OccNormElement)*(this->xdim+1)); |
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218 | this->elementAddr[y + z*this->ydim] = |
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219 | (OccNormElement *)this->elementChunker->currentAddr; |
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220 | |
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221 | this->lengthChunker->newChunkIfNeeded(sizeof(RunLength)*(this->xdim+1)); |
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222 | this->lengthAddr[y + z*this->ydim] = |
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223 | (RunLength *)this->lengthChunker->currentAddr; |
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224 | |
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225 | setScanline(y, z); |
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226 | } |
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227 | |
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228 | |
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229 | void |
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230 | OccGridNormRLE::setScanline(int y, int z) |
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231 | { |
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232 | currentLength = this->lengthAddr[y + z*this->ydim]; |
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233 | currentElem = this->elementAddr[y + z*this->ydim]; |
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234 | } |
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235 | |
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236 | |
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237 | int |
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238 | OccGridNormRLE::write(const char *filename) |
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239 | { |
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240 | FILE *fp = fopen(filename, "wb"); |
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241 | |
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242 | if (fp == NULL) |
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243 | return FALSE; |
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244 | |
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245 | fwrite(&this->xdim, sizeof(int), 1, fp); |
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246 | fwrite(&this->ydim, sizeof(int), 1, fp); |
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247 | fwrite(&this->zdim, sizeof(int), 1, fp); |
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248 | fwrite(&this->axis, sizeof(int), 1, fp); |
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249 | fwrite(&this->flip, sizeof(int), 1, fp); |
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250 | fwrite(&this->origin, sizeof(float), 3, fp); |
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251 | fwrite(&this->resolution, sizeof(float), 1, fp); |
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252 | |
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253 | int yy, zz, numRuns, numElems; |
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254 | |
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255 | |
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256 | |
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257 | // I will write out the file as though it hos no normal |
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258 | // information for now. |
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259 | |
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260 | |
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261 | // First count bytes |
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262 | int lengthByteCount = 0; |
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263 | int elementByteCount = 0; |
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264 | for (zz = 0; zz < this->zdim; zz++) { |
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265 | for (yy = 0; yy < this->ydim; yy++) { |
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266 | runStats(yy, zz, &numRuns, &numElems); |
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267 | // Don't forget the END_OF_RUN |
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268 | lengthByteCount = lengthByteCount + |
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269 | (numRuns + 1)*sizeof(RunLength); |
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270 | elementByteCount = elementByteCount + |
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271 | (numElems)*sizeof(OccElement); |
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272 | } |
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273 | } |
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274 | |
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275 | fwrite(&lengthByteCount, sizeof(int), 1, fp); |
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276 | fwrite(&elementByteCount, sizeof(int), 1, fp); |
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277 | |
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278 | int i; |
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279 | RunLength length; |
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280 | int runType; |
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281 | OccNormElement *element; |
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282 | |
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283 | for (zz = 0; zz < this->zdim; zz++) { |
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284 | for (yy = 0; yy < this->ydim; yy++) { |
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285 | setScanline(yy, zz); |
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286 | while (TRUE) { |
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287 | length = getNextLength(); |
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288 | fwrite(&length, sizeof(RunLength), 1, fp); |
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289 | |
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290 | runType = getRunType(&length); |
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291 | |
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292 | if (runType == OccGridNormRLE::END_OF_RUN) |
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293 | break; |
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294 | |
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295 | if (runType == OccGridNormRLE::CONSTANT_DATA) { |
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296 | element = getNextElement(); |
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297 | fwrite(element, sizeof(OccElement), 1, fp); |
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298 | } |
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299 | else { |
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300 | for (i=0; i<length; i++) { |
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301 | element = getNextElement(); |
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302 | fwrite(element, sizeof(OccElement), 1, fp); |
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303 | } |
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304 | } |
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305 | } |
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306 | } |
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307 | } |
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308 | |
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309 | fclose(fp); |
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310 | |
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311 | return TRUE; |
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312 | } |
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313 | |
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314 | |
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315 | int |
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316 | OccGridNormRLE::read(const char *filename) |
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317 | { |
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318 | int size1, size2, size3, xd, yd, zd, sliceSize; |
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319 | |
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320 | FILE *fp = fopen(filename, "rb"); |
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321 | |
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322 | if (fp == NULL) |
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323 | return FALSE; |
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324 | |
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325 | fread(&xd, sizeof(int), 1, fp); |
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326 | fread(&yd, sizeof(int), 1, fp); |
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327 | fread(&zd, sizeof(int), 1, fp); |
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328 | |
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329 | if (xd != this->xdim || yd != this->ydim || zd != this->zdim) { |
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330 | size1 = xd*yd; |
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331 | size2 = xd*zd; |
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332 | size3 = yd*zd; |
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333 | |
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334 | sliceSize = MAX(MAX(size1, size2), size3); |
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335 | |
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336 | if (this->slice != NULL) |
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337 | delete [] this->slice; |
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338 | this->slice = new OccNormElement[sliceSize]; |
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339 | |
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340 | if (this->lengthAddr != NULL) |
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341 | delete [] this->lengthAddr; |
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342 | this->lengthAddr = new RunLength*[sliceSize]; |
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343 | |
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344 | if (this->elementAddr != NULL) |
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345 | delete [] this->elementAddr; |
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346 | this->elementAddr = new OccNormElement*[sliceSize]; |
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347 | |
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348 | int maxdim = MAX(xd, MAX(yd, zd)); |
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349 | |
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350 | if (this->sliceOrigins != NULL) |
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351 | delete [] this->sliceOrigins; |
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352 | this->sliceOrigins = new vec3f[maxdim]; |
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353 | |
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354 | if (this->scanline != NULL) |
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355 | delete [] this->scanline; |
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356 | this->scanline = new OccNormElement[maxdim]; |
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357 | |
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358 | this->xdim = xd; |
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359 | this->ydim = yd; |
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360 | this->zdim = zd; |
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361 | |
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362 | if (sizeof(OccNormElement) > 2*sizeof(ushort)) { |
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363 | this->transpXZbytesPerScanline = |
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364 | this->xdim*sizeof(OccNormElement)+3*sizeof(ushort); |
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365 | } |
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366 | else { |
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367 | this->transpXZbytesPerScanline = |
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368 | this->xdim/2* |
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369 | (sizeof(OccNormElement)+2*sizeof(ushort)) + sizeof(ushort); |
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370 | } |
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371 | |
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372 | if (this->transpXZslice != NULL) |
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373 | delete [] this->transpXZslice; |
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374 | this->transpXZslice = new uchar |
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375 | [this->zdim*this->transpXZbytesPerScanline]; |
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376 | } |
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377 | |
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378 | fread(&this->axis, sizeof(int), 1, fp); |
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379 | fread(&this->flip, sizeof(int), 1, fp); |
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380 | fread(&this->origin, sizeof(float), 3, fp); |
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381 | fread(&this->resolution, sizeof(float), 1, fp); |
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382 | |
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383 | int lengthByteCount, elementByteCount; |
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384 | fread(&lengthByteCount, sizeof(int), 1, fp); |
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385 | fread(&elementByteCount, sizeof(int), 1, fp); |
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386 | |
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387 | reset(); |
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388 | |
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389 | int i, yy, zz; |
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390 | RunLength length; |
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391 | int runType; |
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392 | OccNormElement element; |
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393 | |
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394 | for (zz = 0; zz < this->zdim; zz++) { |
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395 | for (yy = 0; yy < this->ydim; yy++) { |
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396 | allocNewRun(yy, zz); |
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397 | while (TRUE) { |
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398 | fread(&length, sizeof(RunLength), 1, fp); |
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399 | putNextLength(length); |
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400 | |
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401 | runType = getRunType(&length); |
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402 | |
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403 | if (runType == OccGridNormRLE::END_OF_RUN) |
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404 | break; |
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405 | |
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406 | if (runType == OccGridNormRLE::CONSTANT_DATA) { |
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407 | fread(&element, sizeof(OccNormElement), 1, fp); |
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408 | putNextElement(&element); |
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409 | } |
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410 | else { |
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411 | for (i=0; i<length; i++) { |
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412 | fread(&element, sizeof(OccNormElement), 1, fp); |
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413 | putNextElement(&element); |
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414 | } |
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415 | } |
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416 | } |
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417 | } |
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418 | } |
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419 | |
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420 | fclose(fp); |
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421 | |
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422 | return TRUE; |
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423 | } |
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424 | |
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425 | |
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426 | int |
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427 | OccGridNormRLE::writeDen(const char *) |
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428 | { |
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429 | |
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430 | /* |
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431 | orig_min[0] = extr_min[0] = map_min[0] = 0; |
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432 | orig_min[1] = extr_min[1] = map_min[1] = 0; |
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433 | orig_min[2] = extr_min[2] = map_min[2] = 0; |
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434 | |
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435 | orig_max[0] = extr_max[0] = map_max[0] = this->xdim - 1; |
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436 | orig_max[1] = extr_max[1] = map_max[1] = this->ydim - 1; |
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437 | orig_max[2] = extr_max[2] = map_max[2] = this->zdim - 1; |
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438 | |
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439 | orig_len[0] = extr_len[0] = map_len[0] = this->xdim; |
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440 | orig_len[1] = extr_len[1] = map_len[1] = this->ydim; |
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441 | orig_len[2] = extr_len[2] = map_len[2] = this->zdim; |
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442 | |
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443 | map_warps = 0; |
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444 | |
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445 | map_length = (long)map_len[X] * (long)map_len[Y] * (long)map_len[Z]; |
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446 | |
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447 | map_address = (uchar *)(this->elems); |
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448 | |
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449 | Store_Indexed_DEN_File(filename, sizeof(OccNormElement)); |
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450 | */ |
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451 | |
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452 | // So much for error checking... |
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453 | return TRUE; |
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454 | } |
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455 | |
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456 | |
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457 | void |
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458 | OccGridNormRLE::copy(OccGridNormRLE *other) |
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459 | { |
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460 | OccScanlineNormRLE *rleScanline; |
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461 | |
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462 | this->reset(); |
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463 | this->copyParams(other); |
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464 | |
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465 | for (int zz = 0; zz < this->zdim; zz++) { |
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466 | for (int yy = 0; yy < this->ydim; yy++) { |
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467 | rleScanline = other->getRLEScanline(yy, zz); |
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468 | this->copyScanline(rleScanline, yy, zz); |
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469 | } |
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470 | } |
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471 | |
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472 | } |
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473 | |
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474 | |
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475 | int |
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476 | OccGridNormRLE::transposeXZ(OccGridNormRLE *outGrid) |
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477 | { |
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478 | int zz, yy; |
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479 | OccScanlineNormRLE *rleScanlines; |
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480 | OccNormElement *elementData; |
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481 | RunLength *lengthData; |
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482 | int *runTypes; |
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483 | |
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484 | outGrid->reset(); |
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485 | outGrid->copyParams(this); |
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486 | |
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487 | SWAP_INT(outGrid->xdim, outGrid->zdim); |
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488 | SWAP_FLOAT(outGrid->origin[0], outGrid->origin[2]); |
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489 | |
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490 | // Set up the new scanlines |
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491 | rleScanlines = new OccScanlineNormRLE[outGrid->zdim]; |
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492 | lengthData = new RunLength[(outGrid->xdim+1)*outGrid->zdim]; |
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493 | elementData = new OccNormElement[(outGrid->xdim)*outGrid->zdim]; |
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494 | for (zz = 0; zz < outGrid->zdim; zz++) { |
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495 | rleScanlines[zz].lengths = lengthData + zz*(outGrid->xdim + 1); |
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496 | rleScanlines[zz].elements = elementData + zz*(outGrid->xdim); |
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497 | } |
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498 | |
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499 | // For bookeeping |
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500 | runTypes = new int[outGrid->zdim]; |
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501 | |
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502 | // Rename the bookeeping |
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503 | int *runOffset = runTypes; |
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504 | |
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505 | // Loop over slices |
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506 | for (yy = 0; yy < this->ydim; yy++) { |
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507 | |
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508 | // Initialize scanlines and bookkeeping |
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509 | for (zz = 0; zz < outGrid->zdim; zz++) { |
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510 | rleScanlines[zz].reset(); |
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511 | runOffset[zz] = 0; |
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512 | } |
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513 | |
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514 | int xx; |
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515 | RunLength length; |
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516 | int runType, i; |
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517 | OccNormElement *element; |
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518 | |
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519 | |
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520 | // Lay down first scanline |
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521 | |
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522 | xx = 0; |
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523 | setScanline(yy, 0); |
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524 | while (TRUE) { |
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525 | length = getNextLength(); |
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526 | |
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527 | runType = getRunType(&length); |
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528 | |
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529 | if (runType == OccGridNormRLE::END_OF_RUN) |
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530 | break; |
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531 | |
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532 | if (runType == OccGridNormRLE::CONSTANT_DATA) { |
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533 | element = getNextElement(); |
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534 | for (i=0; i < length; i++, xx++) { |
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535 | rleScanlines[xx].putNextElement(element); |
---|
536 | } |
---|
537 | } |
---|
538 | else { |
---|
539 | for (i=0; i<length; i++, xx++) { |
---|
540 | element = getNextElement(); |
---|
541 | rleScanlines[xx].putNextElement(element); |
---|
542 | } |
---|
543 | } |
---|
544 | } |
---|
545 | assert(xx == this->xdim); |
---|
546 | |
---|
547 | |
---|
548 | // Process the current and previous scanlines concurrently |
---|
549 | |
---|
550 | int end1, end2, type1, type2; |
---|
551 | RunLength length1, length2; |
---|
552 | OccNormElement *elem1, *elem2; |
---|
553 | OccScanlineNormRLE *lastScanline; |
---|
554 | |
---|
555 | // Loop over scanlines |
---|
556 | |
---|
557 | for (zz = 1; zz < this->zdim; zz++) { |
---|
558 | |
---|
559 | // Load up previous scanline |
---|
560 | lastScanline = getRLEScanline(yy, zz-1); |
---|
561 | lastScanline->reset(); |
---|
562 | |
---|
563 | // Load up current scanline |
---|
564 | setScanline(yy, zz); |
---|
565 | |
---|
566 | // Initialize |
---|
567 | xx = 0; |
---|
568 | end1 = 0; |
---|
569 | end2 = 0; |
---|
570 | |
---|
571 | while (xx < this->xdim) { |
---|
572 | // Load up new lengths and/or new element from prior scanline |
---|
573 | if (xx == end1) { |
---|
574 | length1 = lastScanline->getNextLength(); |
---|
575 | type1 = getRunType(&length1); |
---|
576 | end1 += length1; |
---|
577 | elem1 = lastScanline->getNextElement(); |
---|
578 | } else if (type1 == OccGridNormRLE::VARYING_DATA) { |
---|
579 | elem1 = lastScanline->getNextElement(); |
---|
580 | } |
---|
581 | |
---|
582 | // Load up new lengths and/or new element from current scanline |
---|
583 | if (xx == end2) { |
---|
584 | length2 = getNextLength(); |
---|
585 | type2 = getRunType(&length2); |
---|
586 | end2 += length2; |
---|
587 | elem2 = getNextElement(); |
---|
588 | } else if (type2 == OccGridNormRLE::VARYING_DATA) { |
---|
589 | elem2 = getNextElement(); |
---|
590 | } |
---|
591 | |
---|
592 | if (type1 == OccGridNormRLE::CONSTANT_DATA && |
---|
593 | type2 == OccGridNormRLE::CONSTANT_DATA && |
---|
594 | elem1->value == elem2->value && |
---|
595 | elem2->totalWeight == elem2->totalWeight) { |
---|
596 | |
---|
597 | // If both are the same constant value, then skip to end |
---|
598 | // of one of them, whichever comes first |
---|
599 | xx = MIN(end1, end2); |
---|
600 | |
---|
601 | } |
---|
602 | else if (type1 == OccGridNormRLE::VARYING_DATA && |
---|
603 | type2 == OccGridNormRLE::VARYING_DATA) { |
---|
604 | |
---|
605 | // If both are varying values, then write the new value |
---|
606 | rleScanlines[xx].putNextElement(elem2); |
---|
607 | xx++; |
---|
608 | |
---|
609 | } else { |
---|
610 | // Else, clean up old run by updating length |
---|
611 | length = zz - runOffset[xx]; |
---|
612 | setRunType(&length, type1); |
---|
613 | rleScanlines[xx].putNextLength(length); |
---|
614 | |
---|
615 | // Prepare for new run |
---|
616 | runOffset[xx] = zz; |
---|
617 | rleScanlines[xx].putNextElement(elem2); |
---|
618 | xx++; |
---|
619 | } |
---|
620 | } |
---|
621 | } |
---|
622 | |
---|
623 | |
---|
624 | // One last run through to finish up lengths |
---|
625 | zz = this->zdim; |
---|
626 | lastScanline = getRLEScanline(yy, zz-1); |
---|
627 | lastScanline->reset(); |
---|
628 | xx = 0; |
---|
629 | end1 = 0; |
---|
630 | while (xx < this->xdim) { |
---|
631 | if (xx == end1) { |
---|
632 | length1 = lastScanline->getNextLength(); |
---|
633 | type1 = getRunType(&length1); |
---|
634 | end1 += length1; |
---|
635 | elem1 = lastScanline->getNextElement(); |
---|
636 | } else if (type1 == OccGridNormRLE::VARYING_DATA) { |
---|
637 | elem1 = lastScanline->getNextElement(); |
---|
638 | } |
---|
639 | length = zz - runOffset[xx]; |
---|
640 | setRunType(&length, type1); |
---|
641 | rleScanlines[xx].putNextLength(length); |
---|
642 | xx++; |
---|
643 | } |
---|
644 | |
---|
645 | |
---|
646 | // Write out the end-of-run flags and copy runs to output grid |
---|
647 | for (zz = 0; zz < outGrid->zdim; zz++) { |
---|
648 | rleScanlines[zz].putNextLength(OccGridNormRLE::END_OF_RUN); |
---|
649 | outGrid->allocNewRun(yy, zz); |
---|
650 | outGrid->copyScanline(&rleScanlines[zz], yy, zz); |
---|
651 | } |
---|
652 | } |
---|
653 | |
---|
654 | // Re-compactify |
---|
655 | this->copy(outGrid); |
---|
656 | |
---|
657 | // Put into output |
---|
658 | outGrid->copy(this); |
---|
659 | |
---|
660 | delete [] rleScanlines; |
---|
661 | delete [] lengthData; |
---|
662 | delete [] elementData; |
---|
663 | delete [] runTypes; |
---|
664 | |
---|
665 | return TRUE; |
---|
666 | } |
---|
667 | |
---|
668 | |
---|
669 | int |
---|
670 | OccGridNormRLE::transposeXY(OccGridNormRLE *outGrid) |
---|
671 | { |
---|
672 | int zz, yy; |
---|
673 | OccScanlineNormRLE *rleScanlines; |
---|
674 | OccNormElement *elementData; |
---|
675 | RunLength *lengthData; |
---|
676 | int *runTypes; |
---|
677 | |
---|
678 | outGrid->reset(); |
---|
679 | outGrid->copyParams(this); |
---|
680 | |
---|
681 | SWAP_INT(outGrid->xdim, outGrid->ydim); |
---|
682 | SWAP_FLOAT(outGrid->origin[0], outGrid->origin[1]); |
---|
683 | |
---|
684 | rleScanlines = new OccScanlineNormRLE[outGrid->ydim]; |
---|
685 | lengthData = new RunLength[(outGrid->xdim+1)*outGrid->ydim]; |
---|
686 | elementData = new OccNormElement[(outGrid->xdim)*outGrid->ydim]; |
---|
687 | for (yy = 0; yy < outGrid->ydim; yy++) { |
---|
688 | rleScanlines[yy].lengths = lengthData + yy*(outGrid->xdim + 1); |
---|
689 | rleScanlines[yy].elements = elementData + yy*(outGrid->xdim); |
---|
690 | } |
---|
691 | runTypes = new int[outGrid->ydim]; |
---|
692 | |
---|
693 | // Rename the bookeeping |
---|
694 | int *runOffset = runTypes; |
---|
695 | |
---|
696 | // Loop over slices |
---|
697 | for (zz = 0; zz < this->zdim; zz++) { |
---|
698 | |
---|
699 | // Initialize scanlines and bookkeeping |
---|
700 | for (yy = 0; yy < outGrid->ydim; yy++) { |
---|
701 | rleScanlines[yy].reset(); |
---|
702 | runOffset[yy] = 0; |
---|
703 | } |
---|
704 | |
---|
705 | int xx; |
---|
706 | RunLength length; |
---|
707 | int runType, i; |
---|
708 | OccNormElement *element; |
---|
709 | |
---|
710 | |
---|
711 | // Lay down first scanline |
---|
712 | |
---|
713 | xx = 0; |
---|
714 | setScanline(0, zz); |
---|
715 | while (TRUE) { |
---|
716 | length = getNextLength(); |
---|
717 | |
---|
718 | runType = getRunType(&length); |
---|
719 | |
---|
720 | if (runType == OccGridNormRLE::END_OF_RUN) |
---|
721 | break; |
---|
722 | |
---|
723 | if (runType == OccGridNormRLE::CONSTANT_DATA) { |
---|
724 | element = getNextElement(); |
---|
725 | for (i=0; i < length; i++, xx++) { |
---|
726 | rleScanlines[xx].putNextElement(element); |
---|
727 | } |
---|
728 | } |
---|
729 | else { |
---|
730 | for (i=0; i<length; i++, xx++) { |
---|
731 | element = getNextElement(); |
---|
732 | rleScanlines[xx].putNextElement(element); |
---|
733 | } |
---|
734 | } |
---|
735 | } |
---|
736 | assert(xx == this->xdim); |
---|
737 | |
---|
738 | |
---|
739 | // Process the current and previous scanlines concurrently |
---|
740 | |
---|
741 | int end1, end2, type1, type2; |
---|
742 | RunLength length1, length2; |
---|
743 | OccNormElement *elem1, *elem2; |
---|
744 | OccScanlineNormRLE *lastScanline; |
---|
745 | |
---|
746 | // Loop over scanlines |
---|
747 | |
---|
748 | for (yy = 1; yy < this->ydim; yy++) { |
---|
749 | |
---|
750 | // Load up previous scanline |
---|
751 | lastScanline = getRLEScanline(yy-1, zz); |
---|
752 | lastScanline->reset(); |
---|
753 | |
---|
754 | // Load up current scanline |
---|
755 | setScanline(yy, zz); |
---|
756 | |
---|
757 | // Initialize |
---|
758 | xx = 0; |
---|
759 | end1 = 0; |
---|
760 | end2 = 0; |
---|
761 | |
---|
762 | while (xx < this->xdim) { |
---|
763 | // Load up new lengths and/or new element from prior scanline |
---|
764 | if (xx == end1) { |
---|
765 | length1 = lastScanline->getNextLength(); |
---|
766 | type1 = getRunType(&length1); |
---|
767 | end1 += length1; |
---|
768 | elem1 = lastScanline->getNextElement(); |
---|
769 | } else if (type1 == OccGridNormRLE::VARYING_DATA) { |
---|
770 | elem1 = lastScanline->getNextElement(); |
---|
771 | } |
---|
772 | |
---|
773 | // Load up new lengths and/or new element from current scanline |
---|
774 | if (xx == end2) { |
---|
775 | length2 = getNextLength(); |
---|
776 | type2 = getRunType(&length2); |
---|
777 | end2 += length2; |
---|
778 | elem2 = getNextElement(); |
---|
779 | } else if (type2 == OccGridNormRLE::VARYING_DATA) { |
---|
780 | elem2 = getNextElement(); |
---|
781 | } |
---|
782 | |
---|
783 | if (type1 == OccGridNormRLE::CONSTANT_DATA && |
---|
784 | type2 == OccGridNormRLE::CONSTANT_DATA && |
---|
785 | elem1->value == elem2->value && |
---|
786 | elem2->totalWeight == elem2->totalWeight) { |
---|
787 | |
---|
788 | // If both are the same constant value, then skip to end |
---|
789 | // of one of them, whichever comes first |
---|
790 | xx = MIN(end1, end2); |
---|
791 | |
---|
792 | } |
---|
793 | else if (type1 == OccGridNormRLE::VARYING_DATA && |
---|
794 | type2 == OccGridNormRLE::VARYING_DATA) { |
---|
795 | |
---|
796 | // If both are varying values, then write the new value |
---|
797 | rleScanlines[xx].putNextElement(elem2); |
---|
798 | xx++; |
---|
799 | |
---|
800 | } else { |
---|
801 | // Else, clean up old run by updating length |
---|
802 | length = yy - runOffset[xx]; |
---|
803 | setRunType(&length, type1); |
---|
804 | rleScanlines[xx].putNextLength(length); |
---|
805 | |
---|
806 | // Prepare for new run |
---|
807 | runOffset[xx] = yy; |
---|
808 | rleScanlines[xx].putNextElement(elem2); |
---|
809 | xx++; |
---|
810 | } |
---|
811 | } |
---|
812 | } |
---|
813 | |
---|
814 | |
---|
815 | // One last run through to finish up lengths |
---|
816 | yy = this->ydim; |
---|
817 | lastScanline = getRLEScanline(yy-1, zz); |
---|
818 | lastScanline->reset(); |
---|
819 | xx = 0; |
---|
820 | end1 = 0; |
---|
821 | while (xx < this->xdim) { |
---|
822 | if (xx == end1) { |
---|
823 | length1 = lastScanline->getNextLength(); |
---|
824 | type1 = getRunType(&length1); |
---|
825 | end1 += length1; |
---|
826 | elem1 = lastScanline->getNextElement(); |
---|
827 | } else if (type1 == OccGridNormRLE::VARYING_DATA) { |
---|
828 | elem1 = lastScanline->getNextElement(); |
---|
829 | } |
---|
830 | length = yy - runOffset[xx]; |
---|
831 | setRunType(&length, type1); |
---|
832 | rleScanlines[xx].putNextLength(length); |
---|
833 | xx++; |
---|
834 | } |
---|
835 | |
---|
836 | |
---|
837 | // Write out the end-of-run flags and copy runs to output grid |
---|
838 | for (yy = 0; yy < outGrid->ydim; yy++) { |
---|
839 | rleScanlines[yy].putNextLength(OccGridNormRLE::END_OF_RUN); |
---|
840 | outGrid->allocNewRun(yy, zz); |
---|
841 | outGrid->copyScanline(&rleScanlines[yy], yy, zz); |
---|
842 | } |
---|
843 | } |
---|
844 | |
---|
845 | // Re-compactify |
---|
846 | this->copy(outGrid); |
---|
847 | |
---|
848 | // Put into output |
---|
849 | outGrid->copy(this); |
---|
850 | |
---|
851 | delete [] rleScanlines; |
---|
852 | delete [] lengthData; |
---|
853 | delete [] elementData; |
---|
854 | delete [] runTypes; |
---|
855 | |
---|
856 | return TRUE; |
---|
857 | } |
---|
858 | |
---|
859 | |
---|
860 | int |
---|
861 | OccGridNormRLE::transposeYZ(OccGridNormRLE *outGrid) |
---|
862 | { |
---|
863 | int yy,zz; |
---|
864 | OccScanlineNormRLE *rleScanline; |
---|
865 | |
---|
866 | outGrid->reset(); |
---|
867 | outGrid->copyParams(this); |
---|
868 | SWAP_INT(outGrid->ydim, outGrid->zdim); |
---|
869 | SWAP_FLOAT(outGrid->origin[1], outGrid->origin[2]); |
---|
870 | |
---|
871 | for (zz = 0; zz < outGrid->zdim; zz++) { |
---|
872 | for (yy = 0; yy < outGrid->ydim; yy++) { |
---|
873 | rleScanline = this->getRLEScanline(zz, yy); |
---|
874 | outGrid->copyScanline(rleScanline, yy, zz); |
---|
875 | } |
---|
876 | } |
---|
877 | |
---|
878 | if (outGrid->axis == Y_AXIS) |
---|
879 | outGrid->axis = Z_AXIS; |
---|
880 | else if (outGrid->axis == Z_AXIS) |
---|
881 | outGrid->axis = Y_AXIS; |
---|
882 | |
---|
883 | return TRUE; |
---|
884 | } |
---|
885 | |
---|
886 | |
---|
887 | OccScanlineNormRLE * |
---|
888 | OccGridNormRLE::getRLEScanline(int y, int z) |
---|
889 | { |
---|
890 | setScanline(y, z); |
---|
891 | rleScanline->lengths = currentLength; |
---|
892 | rleScanline->elements = currentElem; |
---|
893 | rleScanline->reset(); |
---|
894 | return rleScanline; |
---|
895 | } |
---|
896 | |
---|
897 | |
---|
898 | OccNormElement * |
---|
899 | OccGridNormRLE::getScanline(int y, int z) |
---|
900 | { |
---|
901 | int i; |
---|
902 | |
---|
903 | setScanline(y, z); |
---|
904 | |
---|
905 | OccNormElement *scanPtr = this->scanline; |
---|
906 | |
---|
907 | RunLength length; |
---|
908 | int runType; |
---|
909 | OccNormElement *element; |
---|
910 | |
---|
911 | int xx = 0; |
---|
912 | while (TRUE) { |
---|
913 | length = getNextLength(); |
---|
914 | runType = getRunType(&length); |
---|
915 | |
---|
916 | if (runType == OccGridNormRLE::END_OF_RUN) |
---|
917 | break; |
---|
918 | |
---|
919 | if (runType == OccGridNormRLE::CONSTANT_DATA) { |
---|
920 | element = getNextElement(); |
---|
921 | for (i=0; i<length; i++, scanPtr++, xx++) { |
---|
922 | *scanPtr = *element; |
---|
923 | /* |
---|
924 | scanPtr->value = element->value; |
---|
925 | scanPtr->totalWeight = element->totalWeight; |
---|
926 | */ |
---|
927 | } |
---|
928 | } |
---|
929 | else { |
---|
930 | for (i=0; i<length; i++, scanPtr++, xx++) { |
---|
931 | element = getNextElement(); |
---|
932 | *scanPtr = *element; |
---|
933 | |
---|
934 | /* |
---|
935 | scanPtr->value = element->value; |
---|
936 | scanPtr->totalWeight = element->totalWeight; |
---|
937 | */ |
---|
938 | } |
---|
939 | } |
---|
940 | } |
---|
941 | |
---|
942 | assert(xx == this->xdim); |
---|
943 | |
---|
944 | return this->scanline; |
---|
945 | } |
---|
946 | |
---|
947 | |
---|
948 | void |
---|
949 | OccGridNormRLE::copyScanline(OccScanlineNormRLE *rleScanline, int y, int z) |
---|
950 | { |
---|
951 | int i; |
---|
952 | RunLength length; |
---|
953 | int runType; |
---|
954 | OccNormElement *element; |
---|
955 | |
---|
956 | rleScanline->reset(); |
---|
957 | allocNewRun(y,z); |
---|
958 | |
---|
959 | while (TRUE) { |
---|
960 | length = rleScanline->getNextLength(); |
---|
961 | putNextLength(length); |
---|
962 | |
---|
963 | runType = getRunType(&length); |
---|
964 | |
---|
965 | if (runType == OccGridNormRLE::END_OF_RUN) |
---|
966 | break; |
---|
967 | |
---|
968 | if (runType == OccGridNormRLE::CONSTANT_DATA) { |
---|
969 | element = rleScanline->getNextElement(); |
---|
970 | putNextElement(element); |
---|
971 | } |
---|
972 | else { |
---|
973 | for (i=0; i<length; i++) { |
---|
974 | element = rleScanline->getNextElement(); |
---|
975 | putNextElement(element); |
---|
976 | } |
---|
977 | } |
---|
978 | } |
---|
979 | } |
---|
980 | |
---|
981 | |
---|
982 | void |
---|
983 | OccGridNormRLE::putScanline(OccNormElement *line, int y, int z) |
---|
984 | { |
---|
985 | OccNormElement *scan = line; |
---|
986 | ushort count; |
---|
987 | |
---|
988 | int xoff = 0; |
---|
989 | |
---|
990 | allocNewRun(y, z); |
---|
991 | |
---|
992 | OccNormElement emptyNoWeight, fullNoWeight; |
---|
993 | |
---|
994 | emptyNoWeight.value = 0; |
---|
995 | emptyNoWeight.totalWeight = 0; |
---|
996 | emptyNoWeight.nx = 0; |
---|
997 | emptyNoWeight.ny = 0; |
---|
998 | emptyNoWeight.nz = 0; |
---|
999 | //emptyNoWeight.more = FALSE; |
---|
1000 | |
---|
1001 | fullNoWeight.value = USHRT_MAX; |
---|
1002 | fullNoWeight.totalWeight = 0; |
---|
1003 | fullNoWeight.nx = 0; |
---|
1004 | fullNoWeight.ny = 0; |
---|
1005 | fullNoWeight.nz = 0; |
---|
1006 | //fullNoWeight.more = FALSE; |
---|
1007 | |
---|
1008 | while (TRUE) { |
---|
1009 | if (scan->totalWeight == emptyNoWeight.totalWeight |
---|
1010 | && scan->value == emptyNoWeight.value) { |
---|
1011 | count = 0; |
---|
1012 | while(scan->totalWeight == emptyNoWeight.totalWeight |
---|
1013 | && scan->value == emptyNoWeight.value |
---|
1014 | && xoff < this->xdim) { |
---|
1015 | scan++; |
---|
1016 | count++; |
---|
1017 | xoff++; |
---|
1018 | } |
---|
1019 | |
---|
1020 | |
---|
1021 | |
---|
1022 | setRunType(&count, OccGridNormRLE::CONSTANT_DATA); |
---|
1023 | putNextLength(count); |
---|
1024 | putNextElement(&emptyNoWeight); |
---|
1025 | } |
---|
1026 | else if (scan->totalWeight == fullNoWeight.totalWeight |
---|
1027 | && scan->value == fullNoWeight.value) { |
---|
1028 | count = 0; |
---|
1029 | while(scan->totalWeight == fullNoWeight.totalWeight |
---|
1030 | && scan->value == fullNoWeight.value |
---|
1031 | && xoff < this->xdim) { |
---|
1032 | scan++; |
---|
1033 | count++; |
---|
1034 | xoff++; |
---|
1035 | } |
---|
1036 | setRunType(&count, OccGridNormRLE::CONSTANT_DATA); |
---|
1037 | putNextLength(count); |
---|
1038 | putNextElement(&fullNoWeight); |
---|
1039 | } |
---|
1040 | else { |
---|
1041 | count = 0; |
---|
1042 | while (!(scan->totalWeight == emptyNoWeight.totalWeight |
---|
1043 | && scan->value == emptyNoWeight.value) && |
---|
1044 | !(scan->totalWeight == fullNoWeight.totalWeight |
---|
1045 | && scan->value == fullNoWeight.value) && |
---|
1046 | xoff < this->xdim) { |
---|
1047 | |
---|
1048 | putNextElement(scan); |
---|
1049 | scan++; |
---|
1050 | count++; |
---|
1051 | xoff++; |
---|
1052 | } |
---|
1053 | setRunType(&count, OccGridNormRLE::VARYING_DATA); |
---|
1054 | putNextLength(count); |
---|
1055 | } |
---|
1056 | |
---|
1057 | if (xoff == this->xdim) { |
---|
1058 | count = 0; |
---|
1059 | setRunType(&count, OccGridNormRLE::END_OF_RUN); |
---|
1060 | putNextLength(count); |
---|
1061 | break; |
---|
1062 | } |
---|
1063 | } |
---|
1064 | } |
---|
1065 | |
---|
1066 | |
---|
1067 | OccNormElement * |
---|
1068 | OccGridNormRLE::getSlice(const char *axis, int sliceNum, int *pxdim, int *pydim) |
---|
1069 | { |
---|
1070 | OccNormElement *buf1, *buf2; |
---|
1071 | int xx, yy, zz; |
---|
1072 | |
---|
1073 | buf1 = slice; |
---|
1074 | if (EQSTR(axis, "x")) { |
---|
1075 | if (sliceNum < this->xdim) { |
---|
1076 | for (yy = 0; yy < this->ydim; yy++) { |
---|
1077 | for (zz = 0; zz <this->zdim; zz++, buf1++) { |
---|
1078 | buf2 = this->getElement(sliceNum, yy, zz); |
---|
1079 | buf1->value = buf2->value; |
---|
1080 | buf1->totalWeight = buf2->totalWeight; |
---|
1081 | buf1->nx = buf2->nx; |
---|
1082 | buf1->ny = buf2->ny; |
---|
1083 | buf1->nz = buf2->nz; |
---|
1084 | } |
---|
1085 | } |
---|
1086 | } |
---|
1087 | *pxdim = this->zdim; |
---|
1088 | *pydim = this->ydim; |
---|
1089 | } |
---|
1090 | else if (EQSTR(axis, "y")) { |
---|
1091 | if (sliceNum < this->ydim) { |
---|
1092 | for (zz = 0; zz < this->zdim; zz++) { |
---|
1093 | buf2 = this->getScanline(sliceNum,zz); |
---|
1094 | for (xx = 0; xx < this->xdim; xx++, buf1++, buf2++) { |
---|
1095 | buf1->value = buf2->value; |
---|
1096 | buf1->totalWeight = buf2->totalWeight; |
---|
1097 | buf1->nx = buf2->nx; |
---|
1098 | buf1->ny = buf2->ny; |
---|
1099 | buf1->nz = buf2->nz; |
---|
1100 | } |
---|
1101 | } |
---|
1102 | } |
---|
1103 | *pxdim = this->xdim; |
---|
1104 | *pydim = this->zdim; |
---|
1105 | } |
---|
1106 | else if (EQSTR(axis, "z")) { |
---|
1107 | if (sliceNum < this->zdim) { |
---|
1108 | for (yy = 0; yy < this->ydim; yy++) { |
---|
1109 | buf2 = this->getScanline(yy, sliceNum); |
---|
1110 | for (xx = 0; xx < this->xdim; xx++, buf1++, buf2++) { |
---|
1111 | buf1->value = buf2->value; |
---|
1112 | buf1->totalWeight = buf2->totalWeight; |
---|
1113 | buf1->nx = buf2->nx; |
---|
1114 | buf1->ny = buf2->ny; |
---|
1115 | buf1->nz = buf2->nz; |
---|
1116 | } |
---|
1117 | } |
---|
1118 | } |
---|
1119 | *pxdim = this->xdim; |
---|
1120 | *pydim = this->ydim; |
---|
1121 | } |
---|
1122 | |
---|
1123 | /* |
---|
1124 | printf("Checking all scanlines\n"); |
---|
1125 | for (zz = 0; zz < this->zdim; zz++) { |
---|
1126 | for (yy = 0; yy < this->ydim; yy++) { |
---|
1127 | buf2 = this->getScanline(yy, zz); |
---|
1128 | for (xx = 0; xx < this->xdim; xx++) { |
---|
1129 | if (buf2->ny > 70) { |
---|
1130 | printf("Bug"); |
---|
1131 | } |
---|
1132 | buf2++; |
---|
1133 | } |
---|
1134 | } |
---|
1135 | } |
---|
1136 | */ |
---|
1137 | |
---|
1138 | return this->slice; |
---|
1139 | } |
---|
1140 | |
---|
1141 | |
---|
1142 | void |
---|
1143 | OccGridNormRLE::clear() |
---|
1144 | { |
---|
1145 | RunLength length, end; |
---|
1146 | |
---|
1147 | this->reset(); |
---|
1148 | |
---|
1149 | setRunType(&end, OccGridNormRLE::END_OF_RUN); |
---|
1150 | |
---|
1151 | length = this->xdim; |
---|
1152 | setRunType(&length, OccGridNormRLE::CONSTANT_DATA); |
---|
1153 | |
---|
1154 | for (int zz = 0; zz < this->zdim; zz++) { |
---|
1155 | for (int yy = 0; yy < this->ydim; yy++) { |
---|
1156 | allocNewRun(yy, zz); |
---|
1157 | putNextLength(length); |
---|
1158 | putNextElement(defaultElement); |
---|
1159 | putNextLength(end); |
---|
1160 | } |
---|
1161 | } |
---|
1162 | } |
---|
1163 | |
---|
1164 | |
---|
1165 | void |
---|
1166 | OccGridNormRLE::reset() |
---|
1167 | { |
---|
1168 | this->lengthChunker->reset(); |
---|
1169 | this->elementChunker->reset(); |
---|
1170 | } |
---|
1171 | |
---|
1172 | |
---|
1173 | void |
---|
1174 | OccGridNormRLE::runStats(int yy, int zz, int *numRuns, int *numElems) |
---|
1175 | { |
---|
1176 | int runType, runCount, elemCount; |
---|
1177 | RunLength length; |
---|
1178 | |
---|
1179 | setScanline(yy,zz); |
---|
1180 | |
---|
1181 | runCount = 0; |
---|
1182 | elemCount = 0; |
---|
1183 | while (TRUE) { |
---|
1184 | length = getNextLength(); |
---|
1185 | runType = getRunType(&length); |
---|
1186 | |
---|
1187 | if (runType == OccGridNormRLE::END_OF_RUN) |
---|
1188 | break; |
---|
1189 | |
---|
1190 | elemCount += length; |
---|
1191 | runCount++; |
---|
1192 | } |
---|
1193 | |
---|
1194 | *numRuns = runCount; |
---|
1195 | *numElems = elemCount; |
---|
1196 | } |
---|
1197 | |
---|
1198 | |
---|
1199 | OccNormElement * |
---|
1200 | OccGridNormRLE::getElement(int xx, int yy, int zz) |
---|
1201 | { |
---|
1202 | OccNormElement *element; |
---|
1203 | RunLength length; |
---|
1204 | int runType; |
---|
1205 | |
---|
1206 | setScanline(yy, zz); |
---|
1207 | |
---|
1208 | int currentX = 0; |
---|
1209 | while (TRUE) { |
---|
1210 | length = getNextLength(); |
---|
1211 | runType = getRunType(&length); |
---|
1212 | |
---|
1213 | assert(runType != OccGridNormRLE::END_OF_RUN); |
---|
1214 | |
---|
1215 | if (runType == OccGridNormRLE::CONSTANT_DATA) { |
---|
1216 | element = getNextElement(); |
---|
1217 | currentX += length; |
---|
1218 | if (xx < currentX) |
---|
1219 | break; |
---|
1220 | } |
---|
1221 | else { |
---|
1222 | // Really inefficient!! |
---|
1223 | /* |
---|
1224 | for (int i = 0; i < length; i++, currentX++) { |
---|
1225 | element = getNextElement(); |
---|
1226 | if (xx == currentX) |
---|
1227 | break; |
---|
1228 | } |
---|
1229 | */ |
---|
1230 | |
---|
1231 | if (xx < currentX+length) { |
---|
1232 | currentElem += (xx - currentX); |
---|
1233 | element = getNextElement(); |
---|
1234 | break; |
---|
1235 | } else { |
---|
1236 | currentX += length; |
---|
1237 | currentElem += length; |
---|
1238 | } |
---|
1239 | } |
---|
1240 | } |
---|
1241 | return element; |
---|
1242 | } |
---|
1243 | |
---|