/* Header for PLY polygon files. - Greg Turk, March 1994 A PLY file contains a single polygonal _object_. An object is composed of lists of _elements_. Typical elements are vertices, faces, edges and materials. Each type of element for a given object has one or more _properties_ associated with the element type. For instance, a vertex element may have as properties three floating-point values x,y,z and three unsigned chars for red, green and blue. --------------------------------------------------------------- Copyright (c) 1994 The Board of Trustees of The Leland Stanford Junior University. All rights reserved. Permission to use, copy, modify and distribute this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice and this permission notice appear in all copies of this software and that you do not sell the software. THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. */ /* -------------------------------------------------------------------------------- Joao Fradinho Oliveira, July 2005 Copyright (c) 2005 University College London copyright conditions as above update for ply reading of multi OS ply files, in any OS (Unix, Macintosh, PC) -------------------------------------------------------------------------------- ply_open_for_reading * was changed to always open files in binary mode, files written in ascii can also be read with this binary mode. * allows opening of filenames that are alias files in macintosh * code tested on pc and mac get_words * was changed to handle line breaks in UNIX, MACINTOSH, PC, it resets the file pointer accordingly for the next read. NOTES: The ply file, has always an ascii part for the header, and a binary or ascii part for the data. The header part in ascii, dictates that linebreaks are used, this make models operating system dependent, as a line break in unix is indicated with the escape character \n, on a macintosh, with \r, and on a pc with \r\n <--2 unsigned chars, 2 bytes, instead of 1 byte. get_words allows reading of any OS, text editors such as BBEdit do not save the linebreaks properly to target OSs with binary files. */ #ifndef __PLY_H__ #define __PLY_H__ #ifdef __cplusplus extern "C" { #endif #include #include #include #include #define PLY_ASCII 1 /* ascii PLY file */ #define PLY_BINARY_BE 2 /* binary PLY file, big endian */ #define PLY_BINARY_LE 3 /* binary PLY file, little endian */ #define PLY_BINARY_NATIVE 4 /* binary PLY file, same endianness as current architecture */ #define PLY_OKAY 0 /* ply routine worked okay */ #define PLY_ERROR -1 /* error in ply routine */ /* scalar data types supported by PLY format */ #define PLY_START_TYPE 0 #define PLY_CHAR 1 #define PLY_SHORT 2 #define PLY_INT 3 #define PLY_UCHAR 4 #define PLY_USHORT 5 #define PLY_UINT 6 #define PLY_FLOAT 7 #define PLY_DOUBLE 8 #define PLY_END_TYPE 9 #define PLY_SCALAR 0 #define PLY_LIST 1 typedef struct PlyProperty { /* description of a property */ char *name; /* property name */ int external_type; /* file's data type */ int internal_type; /* program's data type */ int offset; /* offset bytes of prop in a struct */ int is_list; /* 1 = list, 0 = scalar */ int count_external; /* file's count type */ int count_internal; /* program's count type */ int count_offset; /* offset byte for list count */ } PlyProperty; typedef struct PlyElement { /* description of an element */ char *name; /* element name */ int num; /* number of elements in this object */ int size; /* size of element (bytes) or -1 if variable */ int nprops; /* number of properties for this element */ PlyProperty **props; /* list of properties in the file */ char *store_prop; /* flags: property wanted by user? */ int other_offset; /* offset to un-asked-for props, or -1 if none*/ int other_size; /* size of other_props structure */ } PlyElement; typedef struct PlyOtherProp { /* describes other properties in an element */ char *name; /* element name */ int size; /* size of other_props */ int nprops; /* number of properties in other_props */ PlyProperty **props; /* list of properties in other_props */ } PlyOtherProp; typedef struct OtherData { /* for storing other_props for an other element */ void *other_props; } OtherData; typedef struct OtherElem { /* data for one "other" element */ char *elem_name; /* names of other elements */ int elem_count; /* count of instances of each element */ OtherData **other_data; /* actual property data for the elements */ PlyOtherProp *other_props; /* description of the property data */ } OtherElem; typedef struct PlyOtherElems { /* "other" elements, not interpreted by user */ int num_elems; /* number of other elements */ OtherElem *other_list; /* list of data for other elements */ } PlyOtherElems; typedef struct PlyFile { /* description of PLY file */ FILE *fp; /* file pointer */ int file_type; /* ascii or binary */ float version; /* version number of file */ int nelems; /* number of elements of object */ PlyElement **elems; /* list of elements */ int num_comments; /* number of comments */ char **comments; /* list of comments */ int num_obj_info; /* number of items of object information */ char **obj_info; /* list of object info items */ PlyElement *which_elem; /* which element we're currently writing */ PlyOtherElems *other_elems; /* "other" elements from a PLY file */ } PlyFile; /* memory allocation */ extern char *my_alloc(); #define myalloc(mem_size) my_alloc((mem_size), __LINE__, __FILE__) #ifndef ALLOCN #define REALLOCN(PTR,TYPE,OLD_N,NEW_N) \ { \ if ((OLD_N) == 0) \ { ALLOCN((PTR),TYPE,(NEW_N));} \ else \ { \ (PTR) = (TYPE *)realloc((PTR),(NEW_N)*sizeof(TYPE)); \ if (((PTR) == NULL) && ((NEW_N) != 0)) \ { \ fprintf(stderr, "Memory reallocation failed on line %d in %s\n", \ __LINE__, __FILE__); \ fprintf(stderr, " tried to reallocate %d->%d\n", \ (OLD_N), (NEW_N)); \ exit(-1); \ } \ if ((NEW_N)>(OLD_N)) \ memset((char *)(PTR)+(OLD_N)*sizeof(TYPE), 0, \ ((NEW_N)-(OLD_N))*sizeof(TYPE)); \ } \ } #define ALLOCN(PTR,TYPE,N) \ { (PTR) = (TYPE *) calloc(((unsigned)(N)),sizeof(TYPE));\ if ((PTR) == NULL) { \ fprintf(stderr, "Memory allocation failed on line %d in %s\n", \ __LINE__, __FILE__); \ exit(-1); \ } \ } #define FREE(PTR) { free((PTR)); (PTR) = NULL; } #endif /*** delcaration of routines ***/ int get_native_binary_type2(); extern PlyFile *ply_write(FILE *, int, char **, int); extern PlyFile *ply_open_for_writing(char *, int, char **, int, float *); extern void ply_describe_element(PlyFile *, char *, int, int, PlyProperty *); extern void ply_describe_property(PlyFile *, char *, PlyProperty *); extern void ply_element_count(PlyFile *, char *, int); extern void ply_header_complete(PlyFile *); extern void ply_put_element_setup(PlyFile *, char *); extern void ply_put_element(PlyFile *, void *); extern void ply_put_comment(PlyFile *, char *); extern void ply_put_obj_info(PlyFile *, char *); extern PlyFile *ply_read(FILE *, int *, char ***); extern PlyFile *ply_open_for_reading( char *, int *, char ***, int *, float *); extern PlyProperty **ply_get_element_description(PlyFile *, char *, int*, int*); extern void ply_get_element_setup( PlyFile *, char *, int, PlyProperty *); extern void ply_get_property(PlyFile *, char *, PlyProperty *); extern PlyOtherProp *ply_get_other_properties(PlyFile *, char *, int); extern void ply_get_element(PlyFile *, void *); extern char **ply_get_comments(PlyFile *, int *); extern char **ply_get_obj_info(PlyFile *, int *); extern void ply_close(PlyFile *); extern void ply_get_info(PlyFile *, float *, int *); extern PlyOtherElems *ply_get_other_element (PlyFile *, char *, int); extern void ply_describe_other_elements ( PlyFile *, PlyOtherElems *); extern void ply_put_other_elements (PlyFile *); extern void ply_free_other_elements (PlyOtherElems *); extern void ply_describe_other_properties(PlyFile *, PlyOtherProp *, int); extern int equal_strings(char *, char *); #ifdef __cplusplus } #endif #endif /* !__PLY_H__ */