Hi, I have been working on a class that handles loading, building and then rendering a 3d model that is exported from 3dstudio max in an ase format. Now for the last couple of day I have been banging my head against a wall because there still is some small drawing issues, and I've narrowed it down to the building function.
Heres the class:
#ifndef _OBJECT_HG_
#define _OBJECT_HG_
#include <windows.h>
#include <GL/glut.h>
#include <vector>
#include <stdio.h>
#include <string>
#include <fstream>
#include "Vector.h"
using std::vector;
using std::string;
using std::ifstream;
class Object
{
private:
vector< CVector* > lstVertices;
vector< int > lstIndicies;
vector< bool > lstDrawLine;
Vector* Vertex;
int Indicie;
bool DrawLine;
int Scale;
int DisplayList;
bool IsAlive;
float Location;
float Orientation;
Object( bool UsingModel, bool IsAlive, int Scale ):
UsingModel( UsingModel ), IsAlive( IsAlive ), Scale( Scale )
{
}
~Object()
{
if( glIsList( DisplayList ) )
{
glDeleteLists( DisplayList, 1 );
}
DisplayList = NULL;
}
void getModelInfo()
{
vector< Vector* >::iterator itVertices = lstVertices.begin();
vector< int >::iterator itIndicies = lstIndicies.begin();
vector< bool >::iterator itDrawLine = lstDrawLine.begin();
cout << "Vertex: " << endl;
while( itVertices != lstVertices.end() )
{
cout << "Index: " << (*itVertices)->Index << " x: " << (*itVertices)->x << " y: " << (*itVertices)->y << " z: " << (*itVertices)->z << endl;
++itVertices;
}
cout << endl << endl;
cout << "Index: " << endl;
while( itIndicies != lstIndicies.end() )
{
for( int i = 0; i < 3; ++i )
{
cout << (*itIndicies) << " ";
++itIndicies;
}
cout << endl;
}
cout << endl << endl;
cout << "Connections: " << endl;
while( itDrawLine != lstDrawLine.end() )
{
for( int i = 0; i < 3; ++i )
{
cout << (*itDrawLine) << " ";
++itDrawLine;
}
cout << endl;
}
}
void loadModel( string fileName )
{
ifstream fileReader( fileName.c_str() );
string keyWord;
while( !fileReader.eof() )
{
fileReader >> keyWord;
if( keyWord == "*MESH_VERTEX" )
{
Vertex = new CVector();
fileReader >> Vertex->nIndex;
fileReader >> Vertex->fx;
fileReader >> Vertex->fy;
fileReader >> Vertex->fz;
lstVertices.push_back( Vertex );
}
if( keyWord == "*MESH_FACE" )
{
int Index = 0;
string Point;
fileReader >> Index;
fileReader >> Point;
for( int i = 0; i < 3; ++i )
{
fileReader >> Point;
fileReader >> Indicie;
lstIndicies.push_back( Indicie );
}
for( int i = 0; i < 3; ++i )
{
fileReader >> Point;
fileReader >> DrawLine;
lstDrawLine.push_back( DrawLine );
}
}
}
}
void Render()
{
vector< CVector* >::iterator itVertices = lstVertices.begin();
vector< int >::iterator itIndicies = lstIndicies.begin();
glPushMatrix();
float Angle = Orientation.y * 180.0f / 3.14159f;
Angle += 90;
glTranslatef( Location.x, Location.y, Location.z );
glRotatef( Angle, 0.0f, 1.0f, 0.0f );
glCallList( DisplayList );
glPopMatrix();
}
void buildModel()
{
vector< int >::iterator itIndicies = lstIndicies.begin();
vector< bool >::iterator itDrawLine = lstDrawLine.begin();
DisplayList = glGenLists( 1 );
glNewList( DisplayList, GL_COMPILE );
{
while( itIndicies != lstIndicies.end() )
{
glBegin( GL_TRIANGLE_STRIP );
glVertex3f( getVertex( (*itIndicies) ).x*Scale, getVertex( (*itIndicies) ).yScale, getVertex( (*itIndicies) ).z*Scale );
if( (*itDrawLine) == 0 )
{
glEnd();
}
++itIndicies;
++itDrawLine;
}
}
glEndList();
{
CVector getVertex( const int& Index )
{
vector< CVector* >::iterator itVertices = lstVertices.begin();
while( itVertices != lstVertices.end() )
{
if( (*itVertices)->Index == Index )
{
Vector Vec( (*itVertices)->x, (*itVertices)->y, (*itVertices)->z );
return Vec;
}
else
{
++itVertices;
}
}
delete (*itVertices);
return 0;
}
};
#endif
So how this works is that in your main game loop in the init function I create the object so Player = new Object( true, true, 5); (the constructor is true - am I using my own model, true - is the object alive, and 5 for the scale of the model) then I load my model in the init function like so Player->loadModel( sub ); and then I do Player->buildModel(); so it would make it and store it in the class's display list.
Now when I load in simple files from the ase file like a cube or a triangle there are no problems but as soon as I have a little more of a complex item there are issues and I'm pretty sure that it has to do with how I'm building the model into the displaylist.
heres an image with the problems and how it looks like inside 3dstudio max:
Note: I have highlighted the problem areas with red arrows
Heres another model that I tried loading in with similar problems (thats suppos to be a sub =P
and heres a sextion of the ase file
*MESH_FACE_LIST {
*MESH_FACE 0: A: 363 B: 0 C: 360 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 1: A: 360 B: 359 C: 363 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 2: A: 2 B: 362 C: 364 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 3: A: 364 B: 368 C: 2 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 4: A: 46 B: 45 C: 47 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 5: A: 47 B: 48 C: 46 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 6: A: 373 B: 6 C: 370 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 7: A: 370 B: 369 C: 373 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 8: A: 382 B: 17 C: 375 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 9: A: 375 B: 374 C: 382 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 10: A: 391 B: 20 C: 384 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 11: A: 384 B: 383 C: 391 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 12: A: 396 B: 1 C: 372 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 13: A: 372 B: 392 C: 396 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 14: A: 393 B: 7 C: 26 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 15: A: 32 B: 393 C: 26 AB: 1 BC: 0 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 16: A: 32 B: 26 C: 29 AB: 0 BC: 1 CA: 1 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 17: A: 5 B: 365 C: 397 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 18: A: 397 B: 404 C: 5 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 19: A: 3 B: 361 C: 405 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 20: A: 405 B: 398 C: 3 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 21: A: 6 B: 373 C: 407 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 22: A: 407 B: 411 C: 6 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 23: A: 0 B: 363 C: 412 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 24: A: 412 B: 408 C: 0 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
*MESH_FACE 25: A: 413 B: 2 C: 368 AB: 1 BC: 1 CA: 0 *MESH_SMOOTHING 1 *MESH_MTLID 0
I'm thinking that I'm either not taking in the area that tells me what indicie is connected to what indicie or again building it wrong with the buildModel function (above).
Thanks.
[Edited by - kubapl on June 7, 2008 7:51:44 PM]
