gLib/shape_file.c File Reference

SHAPE FILE TOOL. More...

#include "shape_file.h"
#include "jbxl_state.h"
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Functions

ShapeIndex * read_shape_index_file (FILE *fp)
BSGraph * read_shape_main_file (ShapeIndex *idx, BSGraph *mp, vector og, vector dd, FILE *fp)
void draw_shape_polygon (ShapeIndex *idx, BSGraph *mp, vector og, vector dd, int cc, FILE *fp)

Detailed Description

Author:
Fumi.Iseki (C)

Definition in file shape_file.c.

Function Documentation

void draw_shape_polygon ( ShapeIndex *  idx,
BSGraph *  mp,
vector  og,
vector  dd,
int  cc,
FILE *  fp 
)

Definition at line 141 of file shape_file.c.

References bline3d(), double_from_little_endian(), int_from_little_endian(), ShapeIndex::maxnum, ShapeIndex::offset, SHAPE_TYPE_POLYGON, UNUSED, vector::x, vector::y, vector::z, and BSGraph::zs.

Referenced by read_shape_main_file().

00142 {
00143     size_t rs;
00144     UNUSED(rs);
00145 
00146     int i, j, k, rdint;
00147     int kk = (int)(og.z + 0.5);     // color
00148     if (kk<0 || kk>mp->zs-1) kk = 0;
00149 
00150     ShapeIndex* sx = idx;
00151 
00152     for (i=0; i<idx->maxnum; i++) {
00153         fseek(fp, sx->offset*2+8, SEEK_SET);
00154         rs = fread(&rdint, 4, 1, fp);
00155         int type = int_from_little_endian((void*)&rdint);
00156         if (type!=SHAPE_TYPE_POLYGON) return;
00157 
00158         fseek(fp, 32L, SEEK_CUR);
00159         rs = fread(&rdint, 4, 1, fp);
00160         int parts  = int_from_little_endian((void*)&rdint);
00161         rs = fread(&rdint, 4, 1, fp);
00162         int points = int_from_little_endian((void*)&rdint);
00163     
00164         for (j=0; j<parts; j++) {
00165             fseek(fp, sx->offset*2+52+j*4, SEEK_SET);       // offset*2 + 8 + 44 + j*4
00166             rs = fread(&rdint, 4, 1, fp);
00167             int sttidx = int_from_little_endian((void*)&rdint);
00168             int endidx = points - 1;
00169     
00170             if (j<parts-1) {
00171                 rs = fread(&rdint, 4, 1, fp);
00172                 endidx = int_from_little_endian((void*)&rdint) - 1;
00173             }
00174 
00175             double xx, yy, ox, oy;
00176             fseek(fp, sx->offset*2+52+parts*4+sttidx*16, SEEK_SET); // offset*2 + 8 + 44 + parts*4 + sttidx*16
00177 
00178             for (k=sttidx; k<=endidx; k++) {
00179                 rs = fread(&xx, 8, 1, fp);
00180                 rs = fread(&yy, 8, 1, fp);
00181                 xx = double_from_little_endian((void*)&xx);
00182                 yy = double_from_little_endian((void*)&yy);
00183 
00184                 if (k!=sttidx) {
00185                     int oi = (int)((ox-og.x)/dd.x + 0.5);
00186                     int oj = (int)((og.y-oy)/dd.y + 0.5);
00187                     int ii = (int)((xx-og.x)/dd.x + 0.5);
00188                     int jj = (int)((og.y-yy)/dd.y + 0.5);
00189                     bline3d(*mp, oi, oj, kk, ii, jj, kk, cc);
00190                 }
00191                 ox = xx;
00192                 oy = yy;
00193             }
00194         }
00195         sx++;
00196     }
00197 }

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ShapeIndex* read_shape_index_file ( FILE *  fp  ) 

Definition at line 13 of file shape_file.c.

References ShapeIndex::datanum, DEBUG_MODE, int_from_big_endian(), int_from_little_endian(), ShapeIndex::maxnum, ShapeIndex::offset, PRINT_MESG, ShapeIndex::size, ShapeIndex::type, and UNUSED.

00014 {
00015     int magic, type, rdint;
00016     size_t rs;
00017     UNUSED(rs);
00018 
00019     // Magic Number
00020     fseek(fp, 0L, SEEK_SET);
00021     rs = fread(&rdint, 4, 1, fp);
00022     magic = int_from_big_endian((void*)&rdint);
00023     if (magic!=9994) {
00024         DEBUG_MODE PRINT_MESG("READ_SHAPE_INDEX_FILE: But Mafic Number = %d\n", magic);
00025         return NULL;
00026     }
00027     
00028     // Shape Type
00029     fseek(fp, 32L, SEEK_SET);
00030     rs = fread(&rdint, 4, 1, fp);
00031     type = int_from_little_endian((void*)&rdint);
00032 
00033     //
00034     int i, count = 0;
00035 
00036     fseek(fp, 100L, SEEK_SET);
00037     rs = fread(&rdint, 4, 1, fp);
00038     rs = fread(&rdint, 4, 1, fp);
00039     while(!feof(fp)) {
00040         count++;
00041         rs = fread(&rdint, 4, 1, fp);    // next record
00042         rs = fread(&rdint, 4, 1, fp);    // next record
00043     }
00044 
00045     ShapeIndex* shpidx = (ShapeIndex*)malloc(count*sizeof(ShapeIndex));
00046     if (shpidx==NULL) return NULL;
00047     
00048     fseek(fp, 100L, SEEK_SET);
00049     for (i=0; i<count; i++) {
00050         shpidx[i].datanum = i;
00051         shpidx[i].type    = type;
00052         shpidx[i].maxnum  = count;
00053         rs = fread(&rdint, 4, 1, fp);
00054         shpidx[i].offset  = int_from_big_endian((void*)&rdint);
00055         rs = fread(&rdint, 4, 1, fp);
00056         shpidx[i].size    = int_from_big_endian((void*)&rdint);
00057     }
00058     
00059     return shpidx;
00060 }

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BSGraph* read_shape_main_file ( ShapeIndex *  idx,
BSGraph *  mp,
vector  og,
vector  dd,
FILE *  fp 
)

Definition at line 64 of file shape_file.c.

References DEBUG_MODE, double_from_little_endian(), draw_shape_polygon(), BSGraph::gp, int_from_big_endian(), int_from_little_endian(), JBXL_NORMAL, make_BSGraph(), PRINT_MESG, set_vector(), SHAPE_TYPE_POLYGON, BSGraph::state, ShapeIndex::type, UNUSED, vector::x, vector::y, and vector::z.

00065 {
00066     int magic, type, rdint;
00067     unsigned char rdbyte[8];
00068     double xmin, ymin, zmin, xmax, ymax, zmax;
00069     size_t rs;
00070     UNUSED(rs);
00071 
00072     // Magic Number
00073     fseek(fp, 0L, SEEK_SET);
00074     rs = fread(&rdint, 4, 1, fp);
00075     magic = int_from_big_endian((void*)&rdint);
00076     if (magic!=9994) {
00077         DEBUG_MODE PRINT_MESG("READ_SHAPE_MAIN_FILE: But Mafic Number = %d\n", magic);
00078         return NULL;
00079     }
00080     
00081     // Shape Type
00082     fseek(fp, 32L, SEEK_SET);
00083     rs = fread(&rdint, 4, 1, fp);
00084     type = int_from_little_endian((void*)&rdint);
00085 
00086     if (idx->type!=type) {
00087         DEBUG_MODE PRINT_MESG("READ_SHAPE_MAIN_FILE: Type mismatch with index file %d != %d\n", type, idx->type);
00088         return NULL;
00089     }
00090 
00091     if (idx->type!=SHAPE_TYPE_POLYGON) {
00092         DEBUG_MODE PRINT_MESG("READ_SHAPE_MAIN_FILE: Unsupported Shape Type = %d\n", idx->type);
00093         return NULL;
00094     }
00095 
00096     // Bounding Box
00097     fseek(fp, 36L, SEEK_SET);
00098     rs = fread(rdbyte, 8, 1, fp);
00099     xmin = double_from_little_endian((void*)rdbyte);
00100     rs = fread(rdbyte, 8, 1, fp);
00101     ymin = double_from_little_endian((void*)rdbyte);
00102     rs = fread(rdbyte, 8, 1, fp);
00103     xmax = double_from_little_endian((void*)rdbyte);
00104     rs = fread(rdbyte, 8, 1, fp);
00105     ymax = double_from_little_endian((void*)rdbyte);
00106     rs = fread(rdbyte, 8, 1, fp);
00107     zmin = double_from_little_endian((void*)rdbyte);
00108     rs = fread(rdbyte, 8, 1, fp);
00109     zmax = double_from_little_endian((void*)rdbyte);
00110 
00111     //
00112     if (mp==NULL) {
00113         mp = (BSGraph*)malloc(sizeof(BSGraph));
00114         memset(mp, 0, sizeof(BSGraph));
00115     }
00116     if (mp->gp==NULL) {
00117         if (dd.x<=0.0) dd.x = 1.0;
00118         if (dd.y<=0.0) dd.y = 1.0;
00119         if (dd.z<=0.0) dd.z = 1.0;
00120         int xsize = (int)((xmax - xmin)/dd.x) + 1;
00121         int ysize = (int)((ymax - ymin)/dd.y) + 1;
00122         int zsize = (int)((zmax - zmin)/dd.z) + 1;
00123         *mp = make_BSGraph(xsize, ysize, zsize);
00124         og  = set_vector(xmin, ymax, zmin);
00125     }
00126 
00127     //
00128     switch(idx->type) {
00129 
00130       case SHAPE_TYPE_POLYGON :
00131         draw_shape_polygon(idx, mp, og, dd, 255, fp);
00132         break;
00133     }
00134 
00135     mp->state = JBXL_NORMAL;
00136     return mp;
00137 }

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