source: GTP/trunk/Lib/Vis/Preprocessing/src/ply.h @ 749

Revision 749, 8.2 KB checked in by bittner, 19 years ago (diff)

ply parser support
  • Property svn:executable set to *
RevLine 
[749]1/*
2
3Header for PLY polygon files.
4
5- Greg Turk, March 1994
6
7A PLY file contains a single polygonal _object_.
8
9An object is composed of lists of _elements_.  Typical elements are
10vertices, faces, edges and materials.
11
12Each type of element for a given object has one or more _properties_
13associated with the element type.  For instance, a vertex element may
14have as properties three floating-point values x,y,z and three unsigned
15chars for red, green and blue.
16
17---------------------------------------------------------------
18
19Copyright (c) 1994 The Board of Trustees of The Leland Stanford
20Junior University.  All rights reserved.   
21 
22Permission to use, copy, modify and distribute this software and its   
23documentation for any purpose is hereby granted without fee, provided   
24that the above copyright notice and this permission notice appear in   
25all copies of this software and that you do not sell the software.   
26 
27THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,   
28EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY   
29WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.   
30
31*/
32
33#ifndef __PLY_H__
34#define __PLY_H__
35
36#ifdef __cplusplus
37extern "C" {
38#endif
39
40#include <stdlib.h>
41#include <stdio.h>
42#include <stddef.h>
43#include <string.h>
44   
45#define PLY_ASCII         1      /* ascii PLY file */
46#define PLY_BINARY_BE     2      /* binary PLY file, big endian */
47#define PLY_BINARY_LE     3      /* binary PLY file, little endian */
48#define PLY_BINARY_NATIVE 4      /* binary PLY file, same endianness as
49                                    current architecture */
50   
51#define PLY_OKAY    0           /* ply routine worked okay */
52#define PLY_ERROR  -1           /* error in ply routine */
53
54/* scalar data types supported by PLY format */
55
56#define PLY_START_TYPE 0
57#define PLY_CHAR       1
58#define PLY_SHORT      2
59#define PLY_INT        3
60#define PLY_UCHAR      4
61#define PLY_USHORT     5
62#define PLY_UINT       6
63#define PLY_FLOAT      7
64#define PLY_DOUBLE     8
65#define PLY_END_TYPE   9
66
67#define  PLY_SCALAR  0
68#define  PLY_LIST    1
69
70
71typedef struct PlyProperty {    /* description of a property */
72
73  char *name;                           /* property name */
74  int external_type;                    /* file's data type */
75  int internal_type;                    /* program's data type */
76  int offset;                           /* offset bytes of prop in a struct */
77
78  int is_list;                          /* 1 = list, 0 = scalar */
79  int count_external;                   /* file's count type */
80  int count_internal;                   /* program's count type */
81  int count_offset;                     /* offset byte for list count */
82
83} PlyProperty;
84
85typedef struct PlyElement {     /* description of an element */
86  char *name;                   /* element name */
87  int num;                      /* number of elements in this object */
88  int size;                     /* size of element (bytes) or -1 if variable */
89  int nprops;                   /* number of properties for this element */
90  PlyProperty **props;          /* list of properties in the file */
91  char *store_prop;             /* flags: property wanted by user? */
92  int other_offset;             /* offset to un-asked-for props, or -1 if none*/
93  int other_size;               /* size of other_props structure */
94} PlyElement;
95
96typedef struct PlyOtherProp {   /* describes other properties in an element */
97  char *name;                   /* element name */
98  int size;                     /* size of other_props */
99  int nprops;                   /* number of properties in other_props */
100  PlyProperty **props;          /* list of properties in other_props */
101} PlyOtherProp;
102
103typedef struct OtherData { /* for storing other_props for an other element */
104  void *other_props;
105} OtherData;
106
107typedef struct OtherElem {     /* data for one "other" element */
108  char *elem_name;             /* names of other elements */
109  int elem_count;              /* count of instances of each element */
110  OtherData **other_data;      /* actual property data for the elements */
111  PlyOtherProp *other_props;   /* description of the property data */
112} OtherElem;
113
114typedef struct PlyOtherElems {  /* "other" elements, not interpreted by user */
115  int num_elems;                /* number of other elements */
116  OtherElem *other_list;        /* list of data for other elements */
117} PlyOtherElems;
118
119typedef struct PlyFile {        /* description of PLY file */
120  FILE *fp;                     /* file pointer */
121  int file_type;                /* ascii or binary */
122  float version;                /* version number of file */
123  int nelems;                   /* number of elements of object */
124  PlyElement **elems;           /* list of elements */
125  int num_comments;             /* number of comments */
126  char **comments;              /* list of comments */
127  int num_obj_info;             /* number of items of object information */
128  char **obj_info;              /* list of object info items */
129  PlyElement *which_elem;       /* which element we're currently writing */
130  PlyOtherElems *other_elems;   /* "other" elements from a PLY file */
131} PlyFile;
132
133/* memory allocation */
134extern char *my_alloc();
135#define myalloc(mem_size) my_alloc((mem_size), __LINE__, __FILE__)
136
137#ifndef ALLOCN
138#define REALLOCN(PTR,TYPE,OLD_N,NEW_N)                                                  \
139        {                                                                               \
140            if ((OLD_N) == 0)                                                           \
141            {   ALLOCN((PTR),TYPE,(NEW_N));}                                            \
142            else                                                                        \
143            {                                                                           \
144               (PTR) = (TYPE *)realloc((PTR),(NEW_N)*sizeof(TYPE));                     \
145               if (((PTR) == NULL) && ((NEW_N) != 0))                                   \
146               {                                                                        \
147                   fprintf(stderr, "Memory reallocation failed on line %d in %s\n",     \
148                           __LINE__, __FILE__);                                         \
149                   fprintf(stderr, "  tried to reallocate %d->%d\n",                    \
150                           (OLD_N), (NEW_N));                                           \
151                   exit(-1);                                                            \
152               }                                                                        \
153               if ((NEW_N)>(OLD_N))                                                     \
154                   memset((char *)(PTR)+(OLD_N)*sizeof(TYPE), 0,                        \
155                          ((NEW_N)-(OLD_N))*sizeof(TYPE));                              \
156            }                                                                           \
157        }
158
159#define  ALLOCN(PTR,TYPE,N)                                     \
160        { (PTR) = (TYPE *) calloc(((unsigned)(N)),sizeof(TYPE));\
161          if ((PTR) == NULL) {                                  \
162          fprintf(stderr, "Memory allocation failed on line %d in %s\n", \
163                 __LINE__, __FILE__);                           \
164          exit(-1);                                             \
165          }                                                     \
166        }
167
168
169#define FREE(PTR)  { free((PTR)); (PTR) = NULL; }
170#endif
171   
172
173/*** delcaration of routines ***/
174
175extern PlyFile *ply_write(FILE *, int, char **, int);
176extern PlyFile *ply_open_for_writing(char *, int, char **, int, float *);
177extern void ply_describe_element(PlyFile *, char *, int, int, PlyProperty *);
178extern void ply_describe_property(PlyFile *, char *, PlyProperty *);
179extern void ply_element_count(PlyFile *, char *, int);
180extern void ply_header_complete(PlyFile *);
181extern void ply_put_element_setup(PlyFile *, char *);
182extern void ply_put_element(PlyFile *, void *);
183extern void ply_put_comment(PlyFile *, char *);
184extern void ply_put_obj_info(PlyFile *, char *);
185extern PlyFile *ply_read(FILE *, int *, char ***);
186extern PlyFile *ply_open_for_reading( char *, int *, char ***, int *, float *);
187extern PlyProperty **ply_get_element_description(PlyFile *, char *, int*, int*);
188extern void ply_get_element_setup( PlyFile *, char *, int, PlyProperty *);
189extern void ply_get_property(PlyFile *, char *, PlyProperty *);
190extern PlyOtherProp *ply_get_other_properties(PlyFile *, char *, int);
191extern void ply_get_element(PlyFile *, void *);
192extern char **ply_get_comments(PlyFile *, int *);
193extern char **ply_get_obj_info(PlyFile *, int *);
194extern void ply_close(PlyFile *);
195extern void ply_get_info(PlyFile *, float *, int *);
196extern PlyOtherElems *ply_get_other_element (PlyFile *, char *, int);
197extern void ply_describe_other_elements ( PlyFile *, PlyOtherElems *);
198extern void ply_put_other_elements (PlyFile *);
199extern void ply_free_other_elements (PlyOtherElems *);
200extern void ply_describe_other_properties(PlyFile *, PlyOtherProp *, int);
201
202extern int equal_strings(char *, char *);
203
204
205#ifdef __cplusplus
206}
207#endif
208#endif /* !__PLY_H__ */
209
210
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