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 "vripAux.h" |
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23 | #include "vripGlobals.h" |
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24 | |
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25 | |
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26 | void |
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27 | expandVaryingFromConstant(OccGridRLE *inGrid, OccGridRLE *outGrid) |
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28 | { |
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29 | int i; |
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30 | RunLength length, len; |
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31 | int runType; |
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32 | OccElement *element; |
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33 | |
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34 | outGrid->copyParams(inGrid); |
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35 | outGrid->reset(); |
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36 | for (int zz = 0; zz < inGrid->zdim; zz++) { |
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37 | for (int yy = 0; yy < inGrid->ydim; yy++) { |
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38 | inGrid->setScanline(yy,zz); |
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39 | outGrid->allocNewRun(yy,zz); |
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40 | |
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41 | while (TRUE) { |
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42 | length = inGrid->getNextLength(); |
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43 | runType = inGrid->getRunType(&length); |
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44 | |
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45 | if (runType == OccGridRLE::END_OF_RUN) { |
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46 | inGrid->setRunType(&length, OccGridRLE::END_OF_RUN); |
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47 | outGrid->putNextLength(length); |
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48 | break; |
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49 | } |
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50 | |
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51 | if (runType == OccGridRLE::CONSTANT_DATA) { |
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52 | element = inGrid->getNextElement(); |
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53 | len = 1; |
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54 | inGrid->setRunType(&len, OccGridRLE::VARYING_DATA); |
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55 | outGrid->putNextLength(len); |
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56 | outGrid->putNextElement(element); |
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57 | |
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58 | if (length > 2) { |
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59 | len = length - 2; |
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60 | inGrid->setRunType(&len, OccGridRLE::CONSTANT_DATA); |
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61 | outGrid->putNextLength(len); |
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62 | outGrid->putNextElement(element); |
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63 | } |
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64 | |
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65 | if (length >= 2) { |
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66 | len = 1; |
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67 | inGrid->setRunType(&len, OccGridRLE::VARYING_DATA); |
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68 | outGrid->putNextLength(len); |
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69 | outGrid->putNextElement(element); |
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70 | } |
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71 | } |
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72 | else { |
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73 | len = length; |
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74 | inGrid->setRunType(&len, OccGridRLE::VARYING_DATA); |
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75 | outGrid->putNextLength(len); |
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76 | for (i=0; i<length; i++) { |
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77 | element = inGrid->getNextElement(); |
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78 | outGrid->putNextElement(element); |
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79 | } |
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80 | } |
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81 | } |
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82 | } |
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83 | } |
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84 | } |
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85 | |
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86 | |
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87 | void |
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88 | swapgrids() |
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89 | { |
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90 | OccGridRLE *tempRLE; |
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91 | tempRLE = backRLEGrid; |
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92 | backRLEGrid = frontRLEGrid; |
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93 | frontRLEGrid = tempRLE; |
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94 | |
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95 | OccGridNormRLE *tempNormRLE; |
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96 | tempNormRLE = backRLEGridNorm; |
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97 | backRLEGridNorm = frontRLEGridNorm; |
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98 | frontRLEGridNorm = tempNormRLE; |
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99 | } |
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100 | |
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