1 | /* |
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2 | * Name : mcfile.c |
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3 | * |
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4 | * Coded : Paul Ning 9/18/89 |
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5 | * |
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6 | * Comment : Library routines for Marching Cubes File Package |
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7 | */ |
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8 | |
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9 | #include <stdlib.h> |
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10 | #include <stdio.h> |
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11 | #include "mcfile.h" |
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12 | |
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13 | |
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14 | /* |
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15 | * GENERAL |
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16 | */ |
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17 | |
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18 | static void Fatal(message) |
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19 | char *message; |
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20 | { |
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21 | printf("MCFILE : %s\n",message); |
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22 | fflush(stdout); |
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23 | exit(-1); |
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24 | } /* Fatal */ |
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25 | |
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26 | |
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27 | /* |
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28 | * HEADER STUFF |
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29 | */ |
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30 | |
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31 | Boolean IsMCFile(fp) |
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32 | FILE *fp; |
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33 | { |
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34 | int magic; |
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35 | |
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36 | rewind(fp); |
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37 | if ((fread(&magic,sizeof(int),1,fp) != 1) || (magic != MC_MAGIC)) |
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38 | return(FALSE); |
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39 | else |
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40 | return(TRUE); |
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41 | } /* IsMCFile */ |
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42 | |
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43 | void MC_InitHeader(fp) |
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44 | FILE *fp; |
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45 | { |
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46 | mcfile header; |
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47 | |
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48 | /* These lines inserted so that this compiles. |
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49 | I don't understand what this function really does, other than |
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50 | write out an unitialized header. (Brian Curless, June 5, 2006) */ |
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51 | |
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52 | header.mc_length = 0; |
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53 | header.mc_tmaptype = 0; |
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54 | header.mc_type = 0; |
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55 | header.mc_magic = 0; |
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56 | |
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57 | MC_WriteHeader(fp,header); |
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58 | } /* MC_InitHeader */ |
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59 | |
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60 | void MC_WriteHeader(fp,header) |
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61 | FILE *fp; |
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62 | mcfile header; |
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63 | { |
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64 | rewind(fp); |
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65 | if (fwrite(&header,sizeof(mcfile),1,fp) != 1) |
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66 | Fatal("Error in writing MC header"); |
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67 | } /* MC_WriteHeader */ |
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68 | |
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69 | mcfile MC_ReadHeader(fp) |
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70 | FILE *fp; |
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71 | { |
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72 | mcfile header; |
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73 | |
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74 | rewind(fp); |
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75 | if (fread(&header,sizeof(mcfile),1,fp) != 1) |
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76 | Fatal("Error in reading MC header"); |
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77 | return(header); |
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78 | } /* MC_ReadHeader */ |
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79 | |
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80 | |
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81 | /* |
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82 | * SURFACE DATA STUFF |
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83 | */ |
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84 | |
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85 | void MC_WriteTriangleVertex(fp,vertex) |
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86 | FILE *fp; |
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87 | TriangleVertex vertex; |
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88 | { |
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89 | if (fwrite(&vertex,sizeof(TriangleVertex),1,fp) != 1) |
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90 | Fatal("Error in writing vertex data"); |
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91 | } /* MC_WriteTriangleVertex */ |
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92 | |
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93 | TriangleVertex MC_ReadTriangleVertex(fp) |
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94 | FILE *fp; |
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95 | { |
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96 | TriangleVertex vertex; |
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97 | |
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98 | if (fread(&vertex,sizeof(TriangleVertex),1,fp) != 1) |
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99 | Fatal("Error in reading vertex data"); |
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100 | return(vertex); |
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101 | } /* MC_ReadTriangleVertex */ |
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102 | |
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103 | |
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