/*

Sample?code?showing?how?to?read?and?write?PLY?polygon?files.

Greg?Turk?March?1994

*/
#include
#include?
#include?
#include?“ply.h“

/*?user‘s?vertex?and?face?definitions?for?a?polygonal?object?*/

typedef?struct?Vertex?{
??float?xyz;?????????????/*?the?usual?3-space?position?of?a?vertex?*/
}?Vertex;

typedef?struct?Face?{
??unsigned?char?intensity;?/*?this?user?attaches?intensity?to?faces?*/
??unsigned?char?nverts;????/*?number?of?vertex?indices?in?list?*/
??int?*verts;??????????????/*?vertex?index?list?*/
}?Face;

/*?polygon?description?of?an?object?（a?cube）?*/

Vertex?verts[]?=?{??/*?vertices?*/
??{?0.0?0.0?0.0}
??{?1.0?0.0?0.0}
??{?1.0?1.0?0.0}
??{?0.0?1.0?0.0}
??{?0.0?0.0?1.0}
??{?1.0?0.0?1.0}
??{?1.0?1.0?1.0}
??{?0.0?1.0?1.0}
};

Face?faces[]?=?{??/*?faces?*/
??{?‘\001‘?4?NULL?}??/*?intensity?vertex?list?count?vertex?list?（empty）?*/
??{?‘\004‘?4?NULL?}
??{?‘\010‘?4?NULL?}
??{?‘\020‘?4?NULL?}
??{?‘\144‘?4?NULL?}
??{?‘\377‘?4?NULL?}
};

/*?list?of?vertices?for?each?face?*/
/*?（notice?that?indices?begin?at?zero）?*/

typedef?int?Vertex_Indices[4];
Vertex_Indices?vert_ptrs[]?=?{
??{?0?1?2?3?}
??{?7?6?5?4?}
??{?0?4?5?1?}
??{?1?5?6?2?}
??{?2?6?7?3?}
??{?3?7?4?0?}
};

/*?information?needed?to?describe?the?user‘s?data?to?the?PLY?routines?*/

char?*elem_names[]?=?{?/*?list?of?the?kinds?of?elements?in?the?user‘s?object?*/
??“vertex“?“face“
};

PlyProperty?vert_props[]?=?{?/*?list?of?property?information?for?a?vertex?*/
??{“x“?PLY_FLOAT?PLY_FLOAT?offsetof（Vertexx）?0?0?0?0}
??{“y“?PLY_FLOAT?PLY_FLOAT?offsetof（Vertexy）?0?0?0?0}
??{“z“?PLY_FLOAT?PLY_FLOAT?offsetof（Vertexz）?0?0?0?0}
};

PlyProperty?face_props[]?=?{?/*?list?of?property?information?for?a?vertex?*/
??{“intensity“?PLY_UCHAR?PLY_UCHAR?offsetof（Faceintensity）?0?0?0?0}
??{“vertex_indices“?PLY_INT?PLY_INT?offsetof（Faceverts）
???1?PLY_UCHAR?PLY_UCHAR?offsetof（Facenverts）}
};

write_test（）;
read_test（）;

/******************************************************************************
The?main?routine?just?creates?and?then?reads?a?PLY?file.
******************************************************************************/

main（）
{

#if?1
??/*?write?a?PLY?file?*/
??write_test（）;
#endif

#if?1
??/*?read?a?PLY?file?*/
??read_test（）;
#endif

}


/******************************************************************************
Write?out?a?PLY?file.
******************************************************************************/

write_test（）
{
??int?ij;
??PlyFile?*ply;
??int?nelems;
??char?**elist;
??int?file_type;
??float?version;
??int?nverts?=?sizeof?（verts）?/?sizeof?（Vertex）;
??int?nfaces?=?sizeof?（faces）?/?sizeof?（Face）;

??/*?create?the?vertex?index?lists?for?the?faces?*/
??for?（i?=?0;?i?????faces[i].verts?=?vert_ptrs[i];

??

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????6882??2008-10-11?21:58??PLYtest\ply.h

?????文件???????7944??2008-10-11?22:33??PLYtest\plytest.cpp

?????文件???????4417??2011-02-13?17:41??PLYtest\PLYtest.dsp

?????文件????????522??2008-10-11?23:14??PLYtest\PLYtest.dsw

?????文件??????66560??2011-02-13?17:41??PLYtest\PLYtest.ncb

?????文件??????49664??2011-02-13?17:41??PLYtest\PLYtest.opt

?????文件???????6709??2011-02-13?15:40??PLYtest\PLYtest.plg

?????文件????????398??2011-02-13?15:40??PLYtest\test.ply

?????文件??????70744??2008-10-11?22:12??PLYtest\testfile.cpp

?????目錄??????????0??2011-02-15?20:10??PLYtest

-----------?---------??----------?-----??----

???????????????213840????????????????????10