I wrote my own obj loader codes and printed values of vertex,texture,normal and face to screen.The values in console screen was correct values but i cant draw the model properly.It looked distorted.
These are my codes about to load obj model:
#include <stdio.h>
#include <math.h>
int i,a,b,isaret,bb;
int chartoint(char chr)
{
if(chr=='0') return 0;
else if(chr=='1') return 1;
else if(chr=='2') return 2;
else if(chr=='3') return 3;
else if(chr=='4') return 4;
else if(chr=='5') return 5;
else if(chr=='6') return 6;
else if(chr=='7') return 7;
else if(chr=='8') return 8;
else if(chr=='9') return 9;
else return 0;
}
char satir_atla(FILE * dosya_gostergesi)
{
char ww;
while(! feof(dosya_gostergesi))
{
ww=getc(dosya_gostergesi);
if(ww=='\n')
break;
}
ww=getc(dosya_gostergesi);
return ww;
}
mtn_kopyala(char ydizi[],char hdizi[])
{
for(i=0; ydizi!='\0'; i++)
{
ydizi[i+1];
hdizi=ydizi;
}
hdizi='\0';
}
char satir_kopyala(FILE * dosya_gostergesi,char hdizi[])
{
char ww;
i=0;
while(1)
{
ww=getc(dosya_gostergesi);
hdizi[i+1];
hdizi=ww;
if(ww=='\n')
{
hdizi='\0'; break;
}
i++;
}
ww=getc(dosya_gostergesi);
return ww;
}
main()
{
FILE * gosterge;
int yedek,sayiin,xxx,yyy,tip,atla,asama,nokta[3],j,ucgen_sayisi=0,vrtx=0,textu=0,nrml=0,ucgennn[10000][9];
char aaaa,satir[100],deneme[]="Aptal",deneme2[]="akilli";
double sayiif=0,texture[10000][3],vertex[10000][3],normal[10000][3];
gosterge=fopen("ucgen2.obj","r");
aaaa=getc(gosterge);
while(! feof(gosterge))
{
if(aaaa=='#')
{
aaaa=satir_atla(gosterge);
}
else if(aaaa=='v')
{
aaaa=getc(gosterge);
if(aaaa==' ') {tip=0;}
else if(aaaa=='t') {tip=1;}
else if(aaaa=='n') {tip=2;}
//sat?r? çözümlemeye ba?la
{
atla=1;
asama=0;
aaaa=satir_kopyala(gosterge,satir);
for(i=0; 1; i++)
{
if((satir=='0' ||
satir=='1' ||
satir=='2' ||
satir=='3' ||
satir=='4' ||
satir=='5' ||
satir=='6' ||
satir=='7' ||
satir=='8' ||
satir=='9' ||
satir=='.') &&
asama%2==0)
{
nokta[asama%2]=i;
asama++;
}
else if ((satir!='0' &&
satir!='1' &&
satir!='2' &&
satir!='3' &&
satir!='4' &&
satir!='5' &&
satir!='6' &&
satir!='7' &&
satir!='8' &&
satir!='9' &&
satir!='.')&&
asama%2==1 )
{
nokta[asama%2]=i-1;
asama++;
atla=0;
}
if(!atla)
{
if((asama%2)==0)
{
sayiif=0;
if(satir[nokta[0]-1]=='-') isaret=-1; else isaret=1;
for(yyy=0, j=nokta[1]; j>=nokta[0]; j--)
{
sayiif+=(chartoint(satir[j])*pow(10,(double)yyy));
if(satir[j]=='.')
nokta[2]=j;
else yyy++;
}
sayiif/=pow(10,(double)(nokta[1]-nokta[2]));
sayiif*=isaret;
//printf("%f\n",sayiif);//sayiif/=1;//(float)pow(10,(double)(nokta[2]-j));
switch(tip)
{
case 0:
vertex[vrtx][asama/2-1]=sayiif;
atla=1;
case 1:
texture[textu][asama/2-1]=sayiif;
atla=1;
default:
normal[nrml][asama/2-1]=sayiif;
atla=1;
break;
}
}
}
if(tip==2)
{
if(asama==6)
{
nrml++;
break;
}
}
else if(tip==1)
{
if(asama==4)
{
textu++;
break;
}
}
else if(tip==0)
{
if(asama==6)
{
vrtx++;
break;
}
}
}
}
}
else if(aaaa=='f')
{
//sat?r? çözümlemeye ba?la
{
atla=1;
asama=0;
aaaa=satir_kopyala(gosterge,satir);
for(i=0; 1; i++)
{
if((satir=='0' ||
satir=='1' ||
satir=='2' ||
satir=='3' ||
satir=='4' ||
satir=='5' ||
satir=='6' ||
satir=='7' ||
satir=='8' ||
satir=='9' ||
satir=='.') &&
asama%2==0)
{
nokta[asama%2]=i;
asama++;
}
else if ((satir!='0' &&
satir!='1' &&
satir!='2' &&
satir!='3' &&
satir!='4' &&
satir!='5' &&
satir!='6' &&
satir!='7' &&
satir!='8' &&
satir!='9' &&
satir!='.')&&
asama%2==1 )
{
nokta[asama%2]=i-1;
asama++;
atla=0;
}
if(!atla)
{
if((asama%2)==0)
{
sayiin=0;
yedek=0;
for(yyy=0, j=nokta[1]; j>=nokta[0]; j--,yyy++)
{
yedek=(int)(chartoint(satir[j]));
for(b=0; b<yyy; b++)
{
yedek*=10;
}
sayiin+=yedek;
}
ucgennn[ucgen_sayisi][asama/2-1]=(int)sayiin;
atla=1;
}
}
if(asama==18)
{
ucgen_sayisi++;
break;
}
}
}
}
else
{
aaaa=getc(gosterge);
}
}
fclose(gosterge);
//printf("%d %d %d %f\n",nokta[0],nokta[1],t, sayiif);
for(i=0; i<vrtx; i++)
{
printf("v ");
for(j=0; j<3; j++)
{
printf("%f ",vertex[j]);
if(j==2) printf("\n");
}
}
printf("\n");
for(i=0; i<textu; i++)
{
printf("vt ");
for(j=0; j<2; j++)
{
printf("%f ",texture[j]);
if(j==1) printf("\n");
}
}
printf("\n");
for(i=0; i<nrml; i++)
{
printf("vn ");
for(j=0; j<3; j++)
{
printf("%f ",normal[j]);
if(j==2) printf("\n");
}
}
printf("\n");
for(i=0; i<ucgen_sayisi; i++)
{
printf("f ");
for(j=0; j<9; j++)
{
if((j%3)!=0) printf("/");
else
printf(" ");
printf("%i",ucgennn[j]);
if(j==8) printf("\n");
}
}
while(1)
{
}
}
I tried the codes in Dev C++.
You can try it to see values.For now, no problem but i couldnt draw properly when i tried these codes in Visual C++ with fist codes.
glPushMatrix();
glScaled(1,1,1);
glRotated(0,0,0,0);
glTranslated(0,0,0);
glBegin(GL_TRIANGLES);
for(i=0; i<ucgen_sayisi; i++)
{
for(j=0; j<3; j++)
{
glNormal3d(normal[ucgennn[j*3+2]][0],normal[ucgennn[j*3+2]][1],normal[ucgennn[j*3+2]][2]);
glVertex3d(vertex[ucgennn[j*3]][0],vertex[ucgennn[j*3]][1],vertex[ucgennn[j*3]][2]);
}
}
glEnd();
glPopMatrix();
Thanks.
