initial import
git-svn-id: svn://anubis/misc/wfobj@19 bd8a9e45-a331-0410-811e-c64571078777
This commit is contained in:
josh
parent
877696c605
commit
14aca0a2e8
17
Makefile
Normal file
17
Makefile
Normal file
@ -0,0 +1,17 @@
|
||||
|
||||
CXX := g++
|
||||
CXXFLAGS := -O2
|
||||
TARGET := WFObj.o
|
||||
SOURCE := WFObj.cc
|
||||
LIBS := -lGL
|
||||
|
||||
all: $(TARGET) driver
|
||||
|
||||
$(TARGET): $(SOURCE) $(SOURCE:.cc=.hh)
|
||||
$(CXX) -c -o $@ $< $(CXXFLAGS)
|
||||
|
||||
driver: driver.cc $(TARGET)
|
||||
$(CXX) -o $@ $< $(TARGET) $(CXXFLAGS) $(LIBS)
|
||||
|
||||
clean:
|
||||
-rm -f *~ *.o
|
||||
273
WFObj.cc
Normal file
273
WFObj.cc
Normal file
@ -0,0 +1,273 @@
|
||||
|
||||
#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 <iostream>
|
||||
#include <fstream>
|
||||
#include "WFObj.hh"
|
||||
using namespace std;
|
||||
|
||||
#define WHITESPACE " \n\r\t\v"
|
||||
#define DEBUGGL
|
||||
|
||||
int WFObj::filesize(const char * filename)
|
||||
{
|
||||
struct stat st;
|
||||
if (stat(filename, &st))
|
||||
return -1;
|
||||
return st.st_size;
|
||||
}
|
||||
|
||||
bool WFObj::load(const string & filename)
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
ifs.close();
|
||||
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)
|
||||
{
|
||||
string line = input;
|
||||
vector<string> lineParts;
|
||||
for (;;)
|
||||
{
|
||||
string token = stripFirstToken(line);
|
||||
if (token == "")
|
||||
break;
|
||||
lineParts.push_back(token);
|
||||
}
|
||||
if (lineParts.size() > 0)
|
||||
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()
|
||||
{
|
||||
GLuint list = glGenLists(1);
|
||||
glNewList(list, GL_COMPILE);
|
||||
int len = m_data.size();
|
||||
enum { VERTEX, VERTEX_TEXTURE, VERTEX_NORMAL, VERTEX_TYPES };
|
||||
vector<Vertex> vertices[VERTEX_TYPES];
|
||||
int numVertsLast = 0;
|
||||
bool inFace = false;
|
||||
for (int i = 0; i < len; i++)
|
||||
{
|
||||
string type = m_data[i][0];
|
||||
if (type == "v")
|
||||
vertices[VERTEX].push_back(readVertex(m_data[i]));
|
||||
else if (type == "vt")
|
||||
vertices[VERTEX_TEXTURE].push_back(readVertex(m_data[i]));
|
||||
else if (type == "vn")
|
||||
vertices[VERTEX_NORMAL].push_back(readVertex(m_data[i]));
|
||||
else if (type == "f")
|
||||
{
|
||||
int numVerts = m_data[i].size() - 1;
|
||||
if (inFace && (numVerts != numVertsLast || numVertsLast > 4))
|
||||
{
|
||||
#ifdef DEBUGGL
|
||||
cout << "glEnd()" << endl;
|
||||
#endif
|
||||
glEnd();
|
||||
inFace = false;
|
||||
}
|
||||
if (!inFace)
|
||||
{
|
||||
if (numVerts == 3)
|
||||
{
|
||||
#ifdef DEBUGGL
|
||||
cout << "glBegin(GL_TRIANGLES)" << endl;
|
||||
#endif
|
||||
glBegin(GL_TRIANGLES);
|
||||
}
|
||||
else if (numVerts == 4)
|
||||
{
|
||||
#ifdef DEBUGGL
|
||||
cout << "glBegin(GL_QUADS)" << endl;
|
||||
#endif
|
||||
glBegin(GL_QUADS);
|
||||
}
|
||||
else
|
||||
{
|
||||
#ifdef DEBUGGL
|
||||
cout << "glBegin(GL_POLYGON)" << endl;
|
||||
#endif
|
||||
glBegin(GL_POLYGON);
|
||||
}
|
||||
inFace = true;
|
||||
}
|
||||
for (int v = 1; v <= numVerts; v++)
|
||||
{
|
||||
int vertexIndices[3] = {0, 0, 0};
|
||||
parseVertexIndices(m_data[i][v], vertexIndices);
|
||||
for (int j = 0; j < 3; j++)
|
||||
{
|
||||
if (vertexIndices[j] < 0)
|
||||
vertexIndices[j] += vertices[j].size() + 1;
|
||||
}
|
||||
bool valid = true;
|
||||
for (int j = 0; j < 3; j++)
|
||||
{
|
||||
if (vertexIndices[j] > vertices[j].size())
|
||||
{
|
||||
valid = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (vertexIndices[VERTEX] <= 0)
|
||||
valid = false;
|
||||
if (!valid)
|
||||
continue;
|
||||
if (vertexIndices[VERTEX_NORMAL] != 0)
|
||||
{
|
||||
/* a normal is present */
|
||||
#ifdef DEBUGGL
|
||||
cout << " glNormal3f(" <<
|
||||
vertices[VERTEX_NORMAL][vertexIndices[VERTEX_NORMAL]-1]
|
||||
[0] << ", " <<
|
||||
vertices[VERTEX_NORMAL][vertexIndices[VERTEX_NORMAL]-1]
|
||||
[1] << ", " <<
|
||||
vertices[VERTEX_NORMAL][vertexIndices[VERTEX_NORMAL]-1]
|
||||
[2] << ")" << endl;
|
||||
#endif
|
||||
glNormal3fv(vertices[VERTEX_NORMAL]
|
||||
[vertexIndices[VERTEX_NORMAL]-1].getData());
|
||||
}
|
||||
if (vertexIndices[VERTEX_TEXTURE] != 0)
|
||||
{
|
||||
/* a texture coordinate is present */
|
||||
#ifdef DEBUGGL
|
||||
cout << " glTexCoord2f(" <<
|
||||
vertices[VERTEX_TEXTURE][vertexIndices[VERTEX_TEXTURE]-1]
|
||||
[0] << ", " <<
|
||||
vertices[VERTEX_TEXTURE][vertexIndices[VERTEX_TEXTURE]-1]
|
||||
[1] << ')' << endl;
|
||||
#endif
|
||||
glTexCoord2fv(vertices[VERTEX_TEXTURE]
|
||||
[vertexIndices[VERTEX_TEXTURE]-1].getData());
|
||||
}
|
||||
#ifdef DEBUGGL
|
||||
cout << " glVertex3f(" <<
|
||||
vertices[VERTEX][vertexIndices[VERTEX]-1][0] << ", " <<
|
||||
vertices[VERTEX][vertexIndices[VERTEX]-1][1] << ", " <<
|
||||
vertices[VERTEX][vertexIndices[VERTEX]-1][2] << ")" <<
|
||||
" [" << vertexIndices[VERTEX] << "]" << endl;
|
||||
#endif
|
||||
glVertex3fv(vertices[VERTEX][vertexIndices[VERTEX]-1].getData());
|
||||
}
|
||||
|
||||
numVertsLast = numVerts;
|
||||
}
|
||||
else if (type == "usemtl")
|
||||
{
|
||||
if (inFace)
|
||||
{
|
||||
#ifdef DEBUGGL
|
||||
cout << "glEnd()" << endl;
|
||||
#endif
|
||||
glEnd();
|
||||
inFace = false;
|
||||
}
|
||||
}
|
||||
else if (type == "mtllib")
|
||||
{
|
||||
}
|
||||
}
|
||||
if (inFace)
|
||||
{
|
||||
#ifdef DEBUGGL
|
||||
cout << "glEnd()" << endl;
|
||||
#endif
|
||||
glEnd();
|
||||
inFace = false;
|
||||
}
|
||||
glEndList();
|
||||
return list;
|
||||
}
|
||||
|
||||
WFObj::Vertex WFObj::readVertex(const vector<string> & parts)
|
||||
{
|
||||
int partslen = parts.size();
|
||||
Vertex v;
|
||||
for (int i = 1; i < partslen; i++)
|
||||
{
|
||||
sscanf(parts[i].c_str(), "%f", &v[i - 1]);
|
||||
}
|
||||
return v;
|
||||
}
|
||||
|
||||
void WFObj::parseVertexIndices(const string & vtxref, int * ret)
|
||||
{
|
||||
vector<string> parts = splitString(vtxref, '/');
|
||||
int num = parts.size();
|
||||
for (int i = 0; i < num && i < 3; i++)
|
||||
sscanf(parts[i].c_str(), "%d", ret + i);
|
||||
}
|
||||
|
||||
vector<string> WFObj::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;
|
||||
}
|
||||
35
WFObj.hh
Normal file
35
WFObj.hh
Normal file
@ -0,0 +1,35 @@
|
||||
|
||||
#include <GL/gl.h>
|
||||
#include <vector>
|
||||
#include <string>
|
||||
|
||||
class WFObj
|
||||
{
|
||||
public:
|
||||
bool load(const std::string & filename);
|
||||
GLuint render();
|
||||
|
||||
private:
|
||||
/* types */
|
||||
class Vertex
|
||||
{
|
||||
public:
|
||||
float operator[](int idx) const { return data[idx]; }
|
||||
const float & operator[](int idx) { return data[idx]; }
|
||||
float * getData() { return data; }
|
||||
private:
|
||||
float data[4];
|
||||
};
|
||||
|
||||
/* methods */
|
||||
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;
|
||||
};
|
||||
21
driver.cc
Normal file
21
driver.cc
Normal file
@ -0,0 +1,21 @@
|
||||
|
||||
#include <iostream>
|
||||
#include "WFObj.hh"
|
||||
using namespace std;
|
||||
|
||||
int main(int argc, char * argv[])
|
||||
{
|
||||
WFObj w;
|
||||
if (argc < 2)
|
||||
{
|
||||
cout << "Usage: " << argv[0] << " <filename>" << endl;
|
||||
return -2;
|
||||
}
|
||||
if (!w.load(argv[1]))
|
||||
{
|
||||
cout << "Couldn't open '" << argv[1] << "'!" << endl;
|
||||
return -1;
|
||||
}
|
||||
w.render();
|
||||
return 0;
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user