Subversion Repositories gelsvn

Rev

Go to most recent revision | Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
39 bj 1 
#include <sys/types.h>
2 
#include <sys/stat.h>
3 
#include <fcntl.h>
4 
#include <iostream>
5 
 
6 
#if defined(_MSC_VER)
7 
#include <io.h>
8 
 
9 
#pragma message("Note: including lib: expat.lib\n")
10 
#pragma comment(lib, "expat.lib")
11 
 
12 
#else
13 
#include <unistd.h>
14 
#endif
15 
#include <expat.h>
16 
 
17 
#include "CGLA/CGLA.h"
18 
#include "Util/Timer.h"
19 
#include "Util/Parse.h"
20 
#include "x3d_load.h"
21 
 
22 
using namespace std;
23 
using namespace CGLA;
24 
using namespace Util;
25 
using namespace IMesh;
26 
 
27 
namespace IMeshUtil
28 
{
29 
  namespace
30 
  {
31 
		TriMeshBuilder* bldr;
32 
  }
33 
 
34 
  void startElement(void *userData, const char *name, const char **atts)
35 
  {
36 
    if (strcmp(name,"IndexedFaceSet")==0)
37 
      {
38 
				int j=0;
39 
				for(j=0; atts[j]!=0; ++j)
40 
					{
41 
						if (strcmp(atts[j],"coordIndex")==0)
42 
							{
43 
								vector<int> coord_index;
44 
								parse(atts[++j],coord_index);
45 
 
46 
								int tri=0;
47 
								Vec3i face;
48 
								for(int i=0;i<coord_index.size();i++)
49 
									{
50 
										if (coord_index[i]==-1)
51 
											{
52 
												tri=0;
53 
												continue;
54 
											}
55 
										switch(tri)
56 
											{
57 
											case 0:
58 
												face[tri] = coord_index[i];
59 
												tri++;
60 
												break;
61 
											case 1:
62 
												face[tri] = coord_index[i];
63 
												tri++;
64 
												break;
65 
											case 2:
66 
												face[tri] = coord_index[i];
67 
												tri++;
68 
												bldr->add_face(face);
69 
												break;
70 
											default:
71 
												/* This is not a triangle.
72 
													 We perform a super-naive triangulation. */
73 
												face[0] = coord_index[i-1];
74 
												face[1] = coord_index[i];
75 
												face[2] = coord_index[i-tri];
76 
												bldr->add_face(face);
77 
												tri++;
78 
												break;
79 
											}
80 
									}
81 
							}
82 
				}
83 
			}
84 
		else if (strcmp(name,"Shape")==0)
85 
      {
86 
				cout << "Found shape" << endl;
87 
      }
88 
    else if (strcmp(name,"Coordinate")==0)
89 
      {
90 
				int j=0;
91 
				for (j=0; atts[j]!=0; ++j)
92 
					{
93 
						if (strcmp(atts[j],"point")==0)
94 
							{
95 
								vector<Vec3f> vertices;
96 
								parse(atts[++j],vertices);
97 
								for(int i=0;i<vertices.size();++i)
98 
									bldr->add_vpos(vertices[i]);
99 
							}
100 
					}
101 
			}
102 
	}
103 
 
104 
  void endElement(void *userData, const char *name)
105 
  {
106 
    if (strcmp(name,"Shape")==0)
107 
      {
108 
				cout << "Shape ends" << endl;
109 
      }
110 
  }
111 
 
112 
  bool x3d_load(const std::string& filename, TriMeshBuilder& builder)
113 
  {
114 
		bldr = &builder;
115 
		builder.clear();
116 
 
117 
    Util::Timer tim;
118 
    tim.start();
119 
 
120 
    std::string baseurl;
121 
#define FIND_LAST_OF(F,C) (int)(F.find_last_of(C) == string::npos ? -1 : F.find_last_of(C))
122 
    int idx = max(FIND_LAST_OF(filename, "\\"), FIND_LAST_OF(filename, "/"));
123 
#undef FIND_LAST_OF
124 
 
125 
    if(idx != -1)
126 
      baseurl = std::string(filename.substr(0, idx+1));
127 
 
128 
 
129 
    XML_Parser parser = XML_ParserCreate(NULL);
130 
    int done=0;
131 
    XML_SetElementHandler(parser, startElement, endElement);
132 
 
133 
    int in;
134 
    if ((in=open(filename.data(),O_RDONLY)) == -1) {
135 
      cout << "Error. "<<  filename << " not found" << endl;
136 
      assert(0);
137 
      return false;
138 
    }
139 
 
140 
    struct stat stat_buf;
141 
    fstat(in, &stat_buf);
142 
 
143 
    const int BUF_SIZE = CGLA::s_min(50000000, static_cast<int>(stat_buf.st_size));
144 
		cout << "buffer size : " << BUF_SIZE << endl;
145 
    char* buf2 = new char[BUF_SIZE];
146 
    size_t len;
147 
    do {
148 
      len = read(in, buf2, BUF_SIZE);
149 
      if (len!=BUF_SIZE)
150 
				done=1;
151 
      if (!XML_Parse(parser, buf2, len, done)) {
152 
				cerr << "%s at line %d\n"
153 
						 << XML_ErrorString(XML_GetErrorCode(parser))
154 
						 << XML_GetCurrentLineNumber(parser);
155 
				assert(0);
156 
				return false;
157 
      }
158 
    } while (!done);
159 
    close(in);
160 
    XML_ParserFree(parser);
161 
    delete buf2;
162 
 
163 
    cout << " Loading took " << tim.get_secs() << endl;
164 
    return true;
165 
  }
166 
}