/
wavefront.cpp
827 lines (661 loc) · 17.2 KB
/
wavefront.cpp
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#ifndef __PPCGEKKO__
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <vector>
#include "wavefront.h"
#ifdef _WIN32
# define strcasecmp _stricmp
#endif
#pragma warning(disable:4996)
typedef std::vector< int > IntVector;
typedef std::vector< float > FloatVector;
namespace WAVEFRONT
{
/*******************************************************************/
/******************** InParser.h ********************************/
/*******************************************************************/
class InPlaceParserInterface
{
public:
virtual int ParseLine(int lineno,int argc,const char **argv) =0; // return TRUE to continue parsing, return FALSE to abort parsing process
};
enum SeparatorType
{
ST_DATA, // is data
ST_HARD, // is a hard separator
ST_SOFT, // is a soft separator
ST_EOS // is a comment symbol, and everything past this character should be ignored
};
class InPlaceParser
{
public:
InPlaceParser(void)
{
Init();
}
InPlaceParser(char *data,int len)
{
Init();
SetSourceData(data,len);
}
InPlaceParser(const char *fname)
{
Init();
SetFile(fname);
}
~InPlaceParser(void);
void Init(void)
{
mQuoteChar = 34;
mData = 0;
mLen = 0;
mMyAlloc = false;
for (int i=0; i<256; i++)
{
mHard[i] = ST_DATA;
mHardString[i*2] = (char)i;
mHardString[i*2+1] = 0;
}
mHard[0] = ST_EOS;
mHard[32] = ST_SOFT;
mHard[9] = ST_SOFT;
mHard[13] = ST_SOFT;
mHard[10] = ST_SOFT;
}
void SetFile(const char *fname); // use this file as source data to parse.
void SetSourceData(char *data,int len)
{
mData = data;
mLen = len;
mMyAlloc = false;
};
int Parse(InPlaceParserInterface *callback); // returns true if entire file was parsed, false if it aborted for some reason
int ProcessLine(int lineno,char *line,InPlaceParserInterface *callback);
const char ** GetArglist(char *source,int &count); // convert source string into an arg list, this is a destructive parse.
void SetHardSeparator(char c) // add a hard separator
{
mHard[c] = ST_HARD;
}
void SetHard(char c) // add a hard separator
{
mHard[c] = ST_HARD;
}
void SetCommentSymbol(char c) // comment character, treated as 'end of string'
{
mHard[c] = ST_EOS;
}
void ClearHardSeparator(char c)
{
mHard[c] = ST_DATA;
}
void DefaultSymbols(void); // set up default symbols for hard seperator and comment symbol of the '#' character.
bool EOS(char c)
{
if ( mHard[c] == ST_EOS )
{
return true;
}
return false;
}
void SetQuoteChar(char c)
{
mQuoteChar = c;
}
private:
inline char * AddHard(int &argc,const char **argv,char *foo);
inline bool IsHard(char c);
inline char * SkipSpaces(char *foo);
inline bool IsWhiteSpace(char c);
inline bool IsNonSeparator(char c); // non seperator,neither hard nor soft
bool mMyAlloc; // whether or not *I* allocated the buffer and am responsible for deleting it.
char *mData; // ascii data to parse.
int mLen; // length of data
SeparatorType mHard[256];
char mHardString[256*2];
char mQuoteChar;
};
/*******************************************************************/
/******************** InParser.cpp ********************************/
/*******************************************************************/
void InPlaceParser::SetFile(const char *fname)
{
if ( mMyAlloc )
{
free(mData);
}
mData = 0;
mLen = 0;
mMyAlloc = false;
FILE *fph = fopen(fname,"rb");
if ( fph )
{
fseek(fph,0L,SEEK_END);
mLen = ftell(fph);
fseek(fph,0L,SEEK_SET);
if ( mLen )
{
mData = (char *) malloc(sizeof(char)*(mLen+1));
size_t ok = fread(mData, mLen, 1, fph);
if ( !ok )
{
free(mData);
mData = 0;
}
else
{
mData[mLen] = 0; // zero byte terminate end of file marker.
mMyAlloc = true;
}
}
fclose(fph);
}
}
InPlaceParser::~InPlaceParser(void)
{
if ( mMyAlloc )
{
free(mData);
}
}
#define MAXARGS 512
bool InPlaceParser::IsHard(char c)
{
return mHard[c] == ST_HARD;
}
char * InPlaceParser::AddHard(int &argc,const char **argv,char *foo)
{
while ( IsHard(*foo) )
{
const char *hard = &mHardString[*foo*2];
if ( argc < MAXARGS )
{
argv[argc++] = hard;
}
foo++;
}
return foo;
}
bool InPlaceParser::IsWhiteSpace(char c)
{
return mHard[c] == ST_SOFT;
}
char * InPlaceParser::SkipSpaces(char *foo)
{
while ( !EOS(*foo) && IsWhiteSpace(*foo) ) foo++;
return foo;
}
bool InPlaceParser::IsNonSeparator(char c)
{
if ( !IsHard(c) && !IsWhiteSpace(c) && c != 0 ) return true;
return false;
}
int InPlaceParser::ProcessLine(int lineno,char *line,InPlaceParserInterface *callback)
{
int ret = 0;
const char *argv[MAXARGS];
int argc = 0;
char *foo = line;
while ( !EOS(*foo) && argc < MAXARGS )
{
foo = SkipSpaces(foo); // skip any leading spaces
if ( EOS(*foo) ) break;
if ( *foo == mQuoteChar ) // if it is an open quote
{
foo++;
if ( argc < MAXARGS )
{
argv[argc++] = foo;
}
while ( !EOS(*foo) && *foo != mQuoteChar ) foo++;
if ( !EOS(*foo) )
{
*foo = 0; // replace close quote with zero byte EOS
foo++;
}
}
else
{
foo = AddHard(argc,argv,foo); // add any hard separators, skip any spaces
if ( IsNonSeparator(*foo) ) // add non-hard argument.
{
bool quote = false;
if ( *foo == mQuoteChar )
{
foo++;
quote = true;
}
if ( argc < MAXARGS )
{
argv[argc++] = foo;
}
if ( quote )
{
while (*foo && *foo != mQuoteChar ) foo++;
if ( *foo ) *foo = 32;
}
// continue..until we hit an eos ..
while ( !EOS(*foo) ) // until we hit EOS
{
if ( IsWhiteSpace(*foo) ) // if we hit a space, stomp a zero byte, and exit
{
*foo = 0;
foo++;
break;
}
else if ( IsHard(*foo) ) // if we hit a hard separator, stomp a zero byte and store the hard separator argument
{
const char *hard = &mHardString[*foo*2];
*foo = 0;
if ( argc < MAXARGS )
{
argv[argc++] = hard;
}
foo++;
break;
}
foo++;
} // end of while loop...
}
}
}
if ( argc )
{
ret = callback->ParseLine(lineno, argc, argv );
}
return ret;
}
int InPlaceParser::Parse(InPlaceParserInterface *callback) // returns true if entire file was parsed, false if it aborted for some reason
{
assert( callback );
if ( !mData ) return 0;
int ret = 0;
int lineno = 0;
char *foo = mData;
char *begin = foo;
while ( *foo )
{
if ( *foo == 10 || *foo == 13 )
{
lineno++;
*foo = 0;
if ( *begin ) // if there is any data to parse at all...
{
int v = ProcessLine(lineno,begin,callback);
if ( v ) ret = v;
}
foo++;
if ( *foo == 10 ) foo++; // skip line feed, if it is in the carraige-return line-feed format...
begin = foo;
}
else
{
foo++;
}
}
lineno++; // lasst line.
int v = ProcessLine(lineno,begin,callback);
if ( v ) ret = v;
return ret;
}
void InPlaceParser::DefaultSymbols(void)
{
SetHardSeparator(',');
SetHardSeparator('(');
SetHardSeparator(')');
SetHardSeparator('=');
SetHardSeparator('[');
SetHardSeparator(']');
SetHardSeparator('{');
SetHardSeparator('}');
SetCommentSymbol('#');
}
const char ** InPlaceParser::GetArglist(char *line,int &count) // convert source string into an arg list, this is a destructive parse.
{
const char **ret = 0;
static const char *argv[MAXARGS];
int argc = 0;
char *foo = line;
while ( !EOS(*foo) && argc < MAXARGS )
{
foo = SkipSpaces(foo); // skip any leading spaces
if ( EOS(*foo) ) break;
if ( *foo == mQuoteChar ) // if it is an open quote
{
foo++;
if ( argc < MAXARGS )
{
argv[argc++] = foo;
}
while ( !EOS(*foo) && *foo != mQuoteChar ) foo++;
if ( !EOS(*foo) )
{
*foo = 0; // replace close quote with zero byte EOS
foo++;
}
}
else
{
foo = AddHard(argc,argv,foo); // add any hard separators, skip any spaces
if ( IsNonSeparator(*foo) ) // add non-hard argument.
{
bool quote = false;
if ( *foo == mQuoteChar )
{
foo++;
quote = true;
}
if ( argc < MAXARGS )
{
argv[argc++] = foo;
}
if ( quote )
{
while (*foo && *foo != mQuoteChar ) foo++;
if ( *foo ) *foo = 32;
}
// continue..until we hit an eos ..
while ( !EOS(*foo) ) // until we hit EOS
{
if ( IsWhiteSpace(*foo) ) // if we hit a space, stomp a zero byte, and exit
{
*foo = 0;
foo++;
break;
}
else if ( IsHard(*foo) ) // if we hit a hard separator, stomp a zero byte and store the hard separator argument
{
const char *hard = &mHardString[*foo*2];
*foo = 0;
if ( argc < MAXARGS )
{
argv[argc++] = hard;
}
foo++;
break;
}
foo++;
} // end of while loop...
}
}
}
count = argc;
if ( argc )
{
ret = argv;
}
return ret;
}
/*******************************************************************/
/******************** Geometry.h ********************************/
/*******************************************************************/
class GeometryVertex
{
public:
float mPos[3];
float mNormal[3];
float mTexel[2];
};
class GeometryInterface
{
public:
virtual void NodeTriangle(const GeometryVertex * /*v1*/,const GeometryVertex * /*v2*/,const GeometryVertex * /*v3*/, bool /*textured*/)
{
}
};
/*******************************************************************/
/******************** Obj.h ********************************/
/*******************************************************************/
class OBJ : public InPlaceParserInterface
{
public:
int LoadMesh(const char *fname,GeometryInterface *callback, bool textured);
int ParseLine(int lineno,int argc,const char **argv); // return TRUE to continue parsing, return FALSE to abort parsing process
private:
void GetVertex(GeometryVertex &v,const char *face) const;
FloatVector mVerts;
FloatVector mTexels;
FloatVector mNormals;
bool mTextured;
GeometryInterface *mCallback;
};
/*******************************************************************/
/******************** Obj.cpp ********************************/
/*******************************************************************/
int OBJ::LoadMesh(const char *fname,GeometryInterface *iface, bool textured)
{
mTextured = textured;
int ret = 0;
mVerts.clear();
mTexels.clear();
mNormals.clear();
mCallback = iface;
InPlaceParser ipp(fname);
ipp.Parse(this);
return ret;
}
/***
static const char * GetArg(const char **argv,int i,int argc)
{
const char * ret = 0;
if ( i < argc ) ret = argv[i];
return ret;
}
****/
void OBJ::GetVertex(GeometryVertex &v,const char *face) const
{
v.mPos[0] = 0;
v.mPos[1] = 0;
v.mPos[2] = 0;
v.mTexel[0] = 0;
v.mTexel[1] = 0;
v.mNormal[0] = 0;
v.mNormal[1] = 1;
v.mNormal[2] = 0;
int index = atoi( face )-1;
const char *texel = strstr(face,"/");
if ( texel )
{
int tindex = atoi( texel+1) - 1;
if ( tindex >=0 && tindex < (int)(mTexels.size()/2) )
{
const float *t = &mTexels[tindex*2];
v.mTexel[0] = t[0];
v.mTexel[1] = t[1];
}
const char *normal = strstr(texel+1,"/");
if ( normal )
{
int nindex = atoi( normal+1 ) - 1;
if (nindex >= 0 && nindex < (int)(mNormals.size()/3) )
{
const float *n = &mNormals[nindex*3];
v.mNormal[0] = n[0];
v.mNormal[1] = n[1];
v.mNormal[2] = n[2];
}
}
}
if ( index >= 0 && index < (int)(mVerts.size()/3) )
{
const float *p = &mVerts[index*3];
v.mPos[0] = p[0];
v.mPos[1] = p[1];
v.mPos[2] = p[2];
}
}
int OBJ::ParseLine(int /*lineno*/,int argc,const char **argv) // return TRUE to continue parsing, return FALSE to abort parsing process
{
int ret = 0;
if ( argc >= 1 )
{
const char *foo = argv[0];
if ( *foo != '#' )
{
if ( strcasecmp(argv[0],"v") == 0 && argc == 4 )
{
float vx = (float) atof( argv[1] );
float vy = (float) atof( argv[2] );
float vz = (float) atof( argv[3] );
mVerts.push_back(vx);
mVerts.push_back(vy);
mVerts.push_back(vz);
}
else if ( strcasecmp(argv[0],"vt") == 0 && (argc == 3 || argc == 4))
{
// ignore 4rd component if present
float tx = (float) atof( argv[1] );
float ty = (float) atof( argv[2] );
mTexels.push_back(tx);
mTexels.push_back(ty);
}
else if ( strcasecmp(argv[0],"vn") == 0 && argc == 4 )
{
float normalx = (float) atof(argv[1]);
float normaly = (float) atof(argv[2]);
float normalz = (float) atof(argv[3]);
mNormals.push_back(normalx);
mNormals.push_back(normaly);
mNormals.push_back(normalz);
}
else if ( strcasecmp(argv[0],"f") == 0 && argc >= 4 )
{
GeometryVertex v[32];
int vcount = argc-1;
for (int i=1; i<argc; i++)
{
GetVertex(v[i-1],argv[i] );
}
mCallback->NodeTriangle(&v[0],&v[1],&v[2], mTextured);
if ( vcount >=3 ) // do the fan
{
for (int i=2; i<(vcount-1); i++)
{
mCallback->NodeTriangle(&v[0],&v[i],&v[i+1], mTextured);
}
}
}
}
}
return ret;
}
class BuildMesh : public GeometryInterface
{
public:
int GetIndex(const float *p, const float *texCoord)
{
int vcount = (int)mVertices.size()/3;
if(vcount>0)
{
//New MS STL library checks indices in debug build, so zero causes an assert if it is empty.
const float *v = &mVertices[0];
const float *t = texCoord != NULL ? &mTexCoords[0] : NULL;
for (int i=0; i<vcount; i++)
{
if ( v[0] == p[0] && v[1] == p[1] && v[2] == p[2] )
{
if (texCoord == NULL || (t[0] == texCoord[0] && t[1] == texCoord[1]))
{
return i;
}
}
v+=3;
if (t != NULL)
t += 2;
}
}
mVertices.push_back( p[0] );
mVertices.push_back( p[1] );
mVertices.push_back( p[2] );
if (texCoord != NULL)
{
mTexCoords.push_back( texCoord[0] );
mTexCoords.push_back( texCoord[1] );
}
return vcount;
}
virtual void NodeTriangle(const GeometryVertex *v1,const GeometryVertex *v2,const GeometryVertex *v3, bool textured)
{
mIndices.push_back( GetIndex(v1->mPos, textured ? v1->mTexel : NULL) );
mIndices.push_back( GetIndex(v2->mPos, textured ? v2->mTexel : NULL) );
mIndices.push_back( GetIndex(v3->mPos, textured ? v3->mTexel : NULL) );
}
const FloatVector& GetVertices(void) const { return mVertices; };
const FloatVector& GetTexCoords(void) const { return mTexCoords; };
const IntVector& GetIndices(void) const { return mIndices; };
private:
FloatVector mVertices;
FloatVector mTexCoords;
IntVector mIndices;
};
};
using namespace WAVEFRONT;
WavefrontObj::WavefrontObj(void)
{
mVertexCount = 0;
mTriCount = 0;
mIndices = 0;
mVertices = NULL;
mTexCoords = NULL;
}
WavefrontObj::~WavefrontObj(void)
{
delete mIndices;
delete mVertices;
}
unsigned int WavefrontObj::loadObj(const char *fname, bool textured) // load a wavefront obj returns number of triangles that were loaded. Data is persists until the class is destructed.
{
unsigned int ret = 0;
delete mVertices;
mVertices = 0;
delete mIndices;
mIndices = 0;
mVertexCount = 0;
mTriCount = 0;
BuildMesh bm;
OBJ obj;
obj.LoadMesh(fname,&bm, textured);
const FloatVector &vlist = bm.GetVertices();
const IntVector &indices = bm.GetIndices();
if ( vlist.size() )
{
mVertexCount = (int)vlist.size()/3;
mVertices = new float[mVertexCount*3];
memcpy( mVertices, &vlist[0], sizeof(float)*mVertexCount*3 );
if (textured)
{
mTexCoords = new float[mVertexCount * 2];
const FloatVector& tList = bm.GetTexCoords();
memcpy( mTexCoords, &tList[0], sizeof(float) * mVertexCount * 2);
}
mTriCount = (int)indices.size()/3;
mIndices = new int[mTriCount*3*sizeof(int)];
memcpy(mIndices, &indices[0], sizeof(int)*mTriCount*3);
ret = mTriCount;
}
return ret;
}
bool WavefrontObj::saveObj(const char *fname,int vcount,const float *vertices,int tcount,const int *indices)
{
bool ret = false;
FILE *fph = fopen(fname,"wb");
if ( fph )
{
for (int i=0; i<vcount; i++)
{
fprintf(fph,"v %0.9f %0.9f %0.9f\r\n", vertices[0], vertices[1], vertices[2] );
vertices+=3;
}
for (int i=0; i<tcount; i++)
{
fprintf(fph,"f %d %d %d\r\n", indices[0]+1, indices[1]+1, indices[2]+1 );
indices+=3;
}
fclose(fph);
ret = true;
}
return ret;
}
#endif