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merged WFMtl code into WFObj files, added loadTexture callback

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git-svn-id: svn://anubis/misc/wfobj@24 bd8a9e45-a331-0410-811e-c64571078777
This commit is contained in:
josh 2008-01-29 03:04:22 +00:00
parent 0ba39b3669
commit 26e2833f82
6 changed files with 328 additions and 322 deletions
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6
Makefile
View File

@ -1,7 +1,7 @@
CXX := g++
CXXFLAGS := -O2
SOURCE := WFObj.cc WFMtl.cc driver.cc
SOURCE := WFObj.cc driver.cc
OBJS := $(SOURCE:.cc=.o)
LDFLAGS := -lGL
TARGET := driver
@ -11,8 +11,8 @@ all: $(TARGET)
$(TARGET): $(OBJS)
$(CXX) -o $@ $^ $(LDFLAGS)
%.o: %.cc
$(CXX) -c -o $@ $^ $(CXXFLAGS)
%.o: %.cc %.hh
$(CXX) -c -o $@ $< $(CXXFLAGS)
clean:
-rm -f *~ *.o $(TARGET)

251
WFMtl.cc
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@ -1,251 +0,0 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h> // isspace()
#include <string.h> // strlen()
#include <GL/gl.h>
#include <vector>
#include <string>
#include <map>
#include <iostream>
#include <fstream>
#include "WFMtl.hh"
using namespace std;
#define WHITESPACE " \n\r\t\v"
#define DEBUGGL
void WFMtl::clear()
{
m_data = map< string, vector< vector<string> > >();
m_currentMaterialName = "";
m_attributesPushed = false;
}
int WFMtl::filesize(const char * filename)
{
struct stat st;
if (stat(filename, &st))
return -1;
return st.st_size;
}
bool WFMtl::load(const string & filename)
{
clear();
int size = filesize(filename.c_str());
if (size < 1)
return false;
ifstream ifs(filename.c_str());
if (!ifs.is_open())
return false;
char buf[size+1];
string buildup;
while (ifs.good())
{
ifs.getline(buf, size+1);
string input = trim(buf);
int sz = input.size();
if (sz == 0 || input[0] == '#')
continue;
if (input[sz-1] == '\\')
{
input[sz-1] = ' ';
buildup = input;
continue;
}
if (buildup != "")
input = buildup + input;
buildup = "";
processInputLine(input);
}
/* DEBUG */
map<string, vector< vector<string> > >::iterator it = m_data.begin();
while (it != m_data.end())
{
cout << "Material '" << it->first << "':" << endl;
for (int i = 0; i < it->second.size(); i++)
{
cout << " ";
for (int j = 0; j < it->second[i].size(); j++)
{
cout << '\'' << it->second[i][j] << "' ";
}
cout << endl;
}
it++;
}
/* END DEBUG */
ifs.close();
return true;
}
string WFMtl::trim(string s)
{
size_t lastpos = s.find_last_not_of(WHITESPACE);
if (lastpos == string::npos)
return "";
s.erase(lastpos + 1);
s.erase(0, s.find_first_not_of(WHITESPACE));
return s;
}
void WFMtl::processInputLine(const std::string & input)
{
string line = input;
vector<string> lineParts;
for (;;)
{
string token = stripFirstToken(line);
if (token == "")
break;
lineParts.push_back(token);
}
if (lineParts.size() > 0)
{
if ( (lineParts.size() >= 2) && (lineParts[0] == "newmtl") )
{
m_currentMaterialName = lineParts[1];
}
else if (m_currentMaterialName != "")
{
m_data[m_currentMaterialName].push_back(lineParts);
}
}
}
string WFMtl::stripFirstToken(string & input)
{
size_t firstnonspace = input.find_first_not_of(WHITESPACE);
if (firstnonspace == string::npos)
return "";
size_t spaceafter = input.find_first_of(WHITESPACE, firstnonspace);
string token = input.substr(firstnonspace, spaceafter - firstnonspace);
input.erase(0, spaceafter);
return token;
}
void WFMtl::renderBegin(const string & mtlname)
{
map< string, vector< vector<string> > >::iterator it = m_data.find(mtlname);
if (it == m_data.end())
return;
vector< vector<string> > & stmts = it->second;
int num_stmts = stmts.size();
bool foundTexture = false;
bool didSomething = false;
for (int i = 0; i < num_stmts; i++)
{
string & type = stmts[i][0];
if (type == "Ka") /* set ambient color */
{
if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
{
pushAttributes();
float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
for (int j = 0; j < 3; j++)
sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
#ifdef DEBUGGL
cout << " glMaterialfv(GL_FRONT, GL_AMBIENT, {";
for (int j = 0; j < 4; j++)
cout << mat[j] << (j < 3 ? ", " : "})");
cout << endl;
#endif
glMaterialfv(GL_FRONT, GL_AMBIENT, mat);
didSomething = true;
}
}
else if (type == "Kd") /* set diffuse color */
{
if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
{
pushAttributes();
float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
for (int j = 0; j < 3; j++)
sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
#ifdef DEBUGGL
cout << " glMaterialfv(GL_FRONT, GL_DIFFUSE, {";
for (int j = 0; j < 4; j++)
cout << mat[j] << (j < 3 ? ", " : "})");
cout << endl;
#endif
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat);
didSomething = true;
}
}
else if (type == "Ks") /* set specular color */
{
if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
{
pushAttributes();
float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
for (int j = 0; j < 3; j++)
sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
#ifdef DEBUGGL
cout << " glMaterialfv(GL_FRONT, GL_SPECULAR, {";
for (int j = 0; j < 4; j++)
cout << mat[j] << (j < 3 ? ", " : "})");
cout << endl;
#endif
glMaterialfv(GL_FRONT, GL_SPECULAR, mat);
didSomething = true;
}
}
else if (type == "map_Kd") /* load a diffuse texture */
{
/* TODO: figure out how i want to load the texture */
foundTexture = true;
didSomething = true;
}
}
if (didSomething)
{
pushAttributes();
if (foundTexture)
{
#ifdef DEBUGGL
cout << " glEnable(GL_TEXTURE_2D)" << endl;
#endif
glEnable(GL_TEXTURE_2D);
}
else
{
#ifdef DEBUGGL
cout << " glDisable(GL_TEXTURE_2D)" << endl;
#endif
glDisable(GL_TEXTURE_2D);
}
}
}
void WFMtl::pushAttributes()
{
if (m_attributesPushed)
return;
m_attributesPushed = true;
#ifdef DEBUGGL
cout << " glPushAttrib(GL_LIGHTING_BIT | GL_TEXTURE_BIT)" << endl;
#endif
glPushAttrib(GL_LIGHTING_BIT | GL_TEXTURE_BIT);
}
void WFMtl::renderEnd(const string & mtlname)
{
map< string, vector< vector<string> > >::iterator it = m_data.find(mtlname);
if (it == m_data.end())
return;
if (m_attributesPushed)
{
#ifdef DEBUGGL
cout << " glPopAttrib()" << endl;
#endif
glPopAttrib();
}
}

27
WFMtl.hh
View File

@ -1,27 +0,0 @@
#include <GL/gl.h>
#include <vector>
#include <string>
#include <map>
class WFMtl
{
public:
bool load(const std::string & filename);
void renderBegin(const std::string & mtlname);
void renderEnd(const std::string & mtlname);
private:
/* methods */
void clear();
std::string trim(std::string s);
int filesize(const char * filename);
void processInputLine(const std::string & input);
std::string stripFirstToken(std::string & input);
void pushAttributes();
/* variables */
std::map< std::string, std::vector< std::vector<std::string> > > m_data;
std::string m_currentMaterialName;
bool m_attributesPushed;
};

325
WFObj.cc
View File

@ -7,15 +7,68 @@
#include <GL/gl.h>
#include <vector>
#include <string>
#include <map>
#include <iostream>
#include <fstream>
#include "WFObj.hh"
#include "WFMtl.hh"
using namespace std;
#define WHITESPACE " \n\r\t\v"
#define DEBUGGL
/****** static functions ******/
static string trimString(string s)
{
size_t lastpos = s.find_last_not_of(WHITESPACE);
if (lastpos == string::npos)
return "";
s.erase(lastpos + 1);
s.erase(0, s.find_first_not_of(WHITESPACE));
return s;
}
static string stripFirstToken(string & input)
{
size_t firstnonspace = input.find_first_not_of(WHITESPACE);
if (firstnonspace == string::npos)
return "";
size_t spaceafter = input.find_first_of(WHITESPACE, firstnonspace);
string token = input.substr(firstnonspace, spaceafter - firstnonspace);
input.erase(0, spaceafter);
return token;
}
static vector<string> splitString(const string & str, char delim)
{
vector<string> ret;
string s = str;
size_t pos;
while ( (pos = s.find(delim)) != string::npos )
{
string t = s.substr(0, pos);
ret.push_back(t);
s.erase(0, pos + 1);
}
if (s != "")
ret.push_back(s);
return ret;
}
static string basePath(const string & str)
{
string path = str;
size_t pos;
if ( (pos = path.find_last_of("/\\")) != string::npos )
{
path.erase(pos + 1);
return path;
}
return "";
}
/****** WFObj functions ******/
void WFObj::clear()
{
m_data = std::vector< std::vector<std::string> >();
@ -29,7 +82,7 @@ int WFObj::filesize(const char * filename)
return st.st_size;
}
bool WFObj::load(const string & filename)
bool WFObj::load(const string & filename, loadTextureFunc_t loadTexture)
{
clear();
@ -46,7 +99,7 @@ bool WFObj::load(const string & filename)
while (ifs.good())
{
ifs.getline(buf, size+1);
string input = trim(buf);
string input = trimString(buf);
int sz = input.size();
if (sz == 0 || input[0] == '#')
continue;
@ -63,18 +116,11 @@ bool WFObj::load(const string & filename)
}
ifs.close();
m_loadTexture = loadTexture;
m_fileName = filename;
return true;
}
string WFObj::trim(string s)
{
size_t lastpos = s.find_last_not_of(WHITESPACE);
if (lastpos == string::npos)
return "";
s.erase(lastpos + 1);
s.erase(0, s.find_first_not_of(WHITESPACE));
return s;
}
void WFObj::processInputLine(const std::string & input)
{
@ -91,16 +137,6 @@ void WFObj::processInputLine(const std::string & input)
m_data.push_back(lineParts);
}
string WFObj::stripFirstToken(string & input)
{
size_t firstnonspace = input.find_first_not_of(WHITESPACE);
if (firstnonspace == string::npos)
return "";
size_t spaceafter = input.find_first_of(WHITESPACE, firstnonspace);
string token = input.substr(firstnonspace, spaceafter - firstnonspace);
input.erase(0, spaceafter);
return token;
}
GLuint WFObj::render()
{
@ -247,7 +283,7 @@ GLuint WFObj::render()
{
if (m_data[i].size() >= 2)
{
material.load(m_data[i][1]);
material.load(basePath(m_fileName) + m_data[i][1], m_loadTexture);
}
}
}
@ -287,18 +323,235 @@ void WFObj::parseVertexIndices(const string & vtxref, int * ret)
sscanf(parts[i].c_str(), "%d", ret + i);
}
vector<string> WFObj::splitString(const string & str, char delim)
/****** WFMtl functions ******/
void WFMtl::clear()
{
vector<string> ret;
string s = str;
size_t pos;
while ( (pos = s.find(delim)) != string::npos )
{
string t = s.substr(0, pos);
ret.push_back(t);
s.erase(0, pos + 1);
}
if (s != "")
ret.push_back(s);
return ret;
m_data = map< string, vector< vector<string> > >();
m_currentMaterialName = "";
m_attributesPushed = false;
}
int WFMtl::filesize(const char * filename)
{
struct stat st;
if (stat(filename, &st))
return -1;
return st.st_size;
}
bool WFMtl::load(const string & filename, WFObj::loadTextureFunc_t loadTexture)
{
clear();
int size = filesize(filename.c_str());
if (size < 1)
return false;
ifstream ifs(filename.c_str());
if (!ifs.is_open())
return false;
char buf[size+1];
string buildup;
while (ifs.good())
{
ifs.getline(buf, size+1);
string input = trimString(buf);
int sz = input.size();
if (sz == 0 || input[0] == '#')
continue;
if (input[sz-1] == '\\')
{
input[sz-1] = ' ';
buildup = input;
continue;
}
if (buildup != "")
input = buildup + input;
buildup = "";
processInputLine(input);
}
/* DEBUG */
map<string, vector< vector<string> > >::iterator it = m_data.begin();
while (it != m_data.end())
{
cout << "Material '" << it->first << "':" << endl;
for (int i = 0; i < it->second.size(); i++)
{
cout << " ";
for (int j = 0; j < it->second[i].size(); j++)
{
cout << '\'' << it->second[i][j] << "' ";
}
cout << endl;
}
it++;
}
/* END DEBUG */
ifs.close();
m_loadTexture = loadTexture;
m_fileName = filename;
return true;
}
void WFMtl::processInputLine(const std::string & input)
{
string line = input;
vector<string> lineParts;
for (;;)
{
string token = stripFirstToken(line);
if (token == "")
break;
lineParts.push_back(token);
}
if (lineParts.size() > 0)
{
if ( (lineParts.size() >= 2) && (lineParts[0] == "newmtl") )
{
m_currentMaterialName = lineParts[1];
}
else if (m_currentMaterialName != "")
{
m_data[m_currentMaterialName].push_back(lineParts);
}
}
}
void WFMtl::renderBegin(const string & mtlname)
{
map< string, vector< vector<string> > >::iterator it = m_data.find(mtlname);
if (it == m_data.end())
return;
vector< vector<string> > & stmts = it->second;
int num_stmts = stmts.size();
bool foundTexture = false;
bool didSomething = false;
for (int i = 0; i < num_stmts; i++)
{
string & type = stmts[i][0];
if (type == "Ka") /* set ambient color */
{
if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
{
pushAttributes();
float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
for (int j = 0; j < 3; j++)
sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
#ifdef DEBUGGL
cout << " glMaterialfv(GL_FRONT, GL_AMBIENT, {";
for (int j = 0; j < 4; j++)
cout << mat[j] << (j < 3 ? ", " : "})");
cout << endl;
#endif
glMaterialfv(GL_FRONT, GL_AMBIENT, mat);
didSomething = true;
}
}
else if (type == "Kd") /* set diffuse color */
{
if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
{
pushAttributes();
float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
for (int j = 0; j < 3; j++)
sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
#ifdef DEBUGGL
cout << " glMaterialfv(GL_FRONT, GL_DIFFUSE, {";
for (int j = 0; j < 4; j++)
cout << mat[j] << (j < 3 ? ", " : "})");
cout << endl;
#endif
glMaterialfv(GL_FRONT, GL_DIFFUSE, mat);
didSomething = true;
}
}
else if (type == "Ks") /* set specular color */
{
if ( (stmts[i].size() == 4) && (stmts[i][1] != "spectral") )
{
pushAttributes();
float mat[4] = {0.0f, 0.0f, 0.0f, 1.0f};
for (int j = 0; j < 3; j++)
sscanf(stmts[i][j+1].c_str(), "%f", &mat[j]);
#ifdef DEBUGGL
cout << " glMaterialfv(GL_FRONT, GL_SPECULAR, {";
for (int j = 0; j < 4; j++)
cout << mat[j] << (j < 3 ? ", " : "})");
cout << endl;
#endif
glMaterialfv(GL_FRONT, GL_SPECULAR, mat);
didSomething = true;
}
}
else if (type == "map_Kd") /* load a diffuse texture */
{
/* TODO: figure out how i want to load the texture */
if (stmts[i].size() == 2)
{
GLuint tex = m_loadTexture( (basePath(m_fileName) +
stmts[i][1]).c_str() );
if (tex > 0)
{
#ifdef DEBUGGL
cout << " glBindTexture(GL_TEXTURE_2D, " << tex << ")" << endl;
#endif
glBindTexture(GL_TEXTURE_2D, tex);
foundTexture = true;
didSomething = true;
}
}
}
}
if (didSomething)
{
pushAttributes();
if (foundTexture)
{
#ifdef DEBUGGL
cout << " glEnable(GL_TEXTURE_2D)" << endl;
#endif
glEnable(GL_TEXTURE_2D);
}
else
{
#ifdef DEBUGGL
cout << " glDisable(GL_TEXTURE_2D)" << endl;
#endif
glDisable(GL_TEXTURE_2D);
}
}
}
void WFMtl::pushAttributes()
{
if (m_attributesPushed)
return;
m_attributesPushed = true;
#ifdef DEBUGGL
cout << " glPushAttrib(GL_LIGHTING_BIT | GL_TEXTURE_BIT)" << endl;
#endif
glPushAttrib(GL_LIGHTING_BIT | GL_TEXTURE_BIT);
}
void WFMtl::renderEnd(const string & mtlname)
{
map< string, vector< vector<string> > >::iterator it = m_data.find(mtlname);
if (it == m_data.end())
return;
if (m_attributesPushed)
{
#ifdef DEBUGGL
cout << " glPopAttrib()" << endl;
#endif
glPopAttrib();
}
}

32
WFObj.hh
View File

@ -2,11 +2,13 @@
#include <GL/gl.h>
#include <vector>
#include <string>
#include <map>
class WFObj
{
public:
bool load(const std::string & filename);
typedef GLuint (*loadTextureFunc_t)(const char * texture);
bool load(const std::string & filename, loadTextureFunc_t loadTexture);
GLuint render();
private:
@ -23,14 +25,36 @@ private:
/* methods */
void clear();
std::string trim(std::string s);
int filesize(const char * filename);
void processInputLine(const std::string & input);
std::string stripFirstToken(std::string & input);
Vertex readVertex(const std::vector<std::string> & parts);
void parseVertexIndices(const std::string & vtxref, int * ret);
std::vector<std::string> splitString(const std::string & str, char delim);
/* variables */
std::vector< std::vector<std::string> > m_data;
loadTextureFunc_t m_loadTexture;
std::string m_fileName;
};
class WFMtl
{
public:
bool load(const std::string & filename, WFObj::loadTextureFunc_t loadTexture);
void renderBegin(const std::string & mtlname);
void renderEnd(const std::string & mtlname);
private:
/* methods */
void clear();
int filesize(const char * filename);
void processInputLine(const std::string & input);
void pushAttributes();
/* variables */
std::map< std::string, std::vector< std::vector<std::string> > > m_data;
std::string m_currentMaterialName;
bool m_attributesPushed;
WFObj::loadTextureFunc_t m_loadTexture;
std::string m_fileName;
};

9
driver.cc
View File

@ -1,8 +1,15 @@
#include <GL/gl.h>
#include <iostream>
#include "WFObj.hh"
using namespace std;
GLuint loadTexture(const char * texture)
{
cout << "got texture request: '" << texture << "'" << endl;
return 33;
}
int main(int argc, char * argv[])
{
WFObj w;
@ -11,7 +18,7 @@ int main(int argc, char * argv[])
cout << "Usage: " << argv[0] << " <filename>" << endl;
return -2;
}
if (!w.load(argv[1]))
if (!w.load(argv[1], &loadTexture))
{
cout << "Couldn't open '" << argv[1] << "'!" << endl;
return -1;