obj file problem
Welp, show us a little more of your code ''n I may post mine when I get back to work Monday. My OBJ loader is certainly not perfect, but I think it should suffice for your purposes. Could compare code...
quote:Original post by neonoblivion
nope I''m using milkshape all models are triangulated(sp)
see
the problem list :
1. When reading in the normals and uv''s, you were incrementing the vertex_index rather than normal_index & uv_index respectively.
2. When reading in the vertices,normals & uv co-ords, the index accessing str_b & str_c was never reset causing the second and third values to be written somewhere in the middle of str_b & str_c respectively. When atof() was then called, the value returned was 0.000000 for all values.
3. You never terminated any of the strings causing a few funny glitches in the data.
4. I changed around the way that you were reading in the index values so that they were a little easier to place in the drawing function.
5. Variables were left unitialised which caused a couple of errors.
As a general tip, when trying to pull some values from a string, you''ll probably find sscanf a lot easier to use
float x,y,z;char *str = "0.1 0.2 0.3";sscanf(str,"%f%f%f",&x,&y,&z); With the case of the face indices, you can use sscanf by placing the characters you want to ignore in there, ie
int x,y,z;char *str = "1/2/3";sscanf(str,"%d/%d/%d",&x,&y,&z); Anyhow, I sent you a few resources, and here''s the working version :
int displaymodel(float x,float y,float z,model* obj){ glPushMatrix(); // use the translate command cos it''s a bit better!!!! // glTranslatef(x,y,z); // can place the begin and end around the for loop glBegin(GL_TRIANGLES); for(int i=0,j=0;i<obj->nump*3;i++,j+=3) { glNormal3f (obj->normals [ 3*obj->polys[j ] ], obj->normals [ 3*obj->polys[j ] + 1 ], obj->normals [ 3*obj->polys[j ] + 2 ]); glTexCoord2f(obj->texcords[ 2*obj->polys[j+1] ], obj->texcords[ 2*obj->polys[j+1] + 1 ]); glVertex3f (obj->vers [ 3*obj->polys[j+2] ], obj->vers [ 3*obj->polys[j+2] + 1 ], obj->vers [ 3*obj->polys[j+2] + 2 ]); } glEnd(); glPopMatrix(); return(1);}int loadmodel(int texindex,model* obj,char* str){ int vers = 0, texs = 0, nors = 0, poly = 0, index = 0, index2 = 0, vertex_index=0, texture_index=0, normal_index=0, poly_index = 0; float *pver = NULL, *ptex = NULL, *pnor = NULL; int *ppoly = NULL; char str2[100], str3[100], str_a[100], str_b[100], str_c[100]; FILE *file; if((file=fopen(str,"r"))==NULL) { return(2); } while(!feof(file)) { fgets(str2,100,file); if(str2[0]==''v'' && str2[1]=='' '') { vers++; } if(str2[0]==''v'' && str2[1]==''t'') { texs++; } if(str2[0]==''v'' && str2[1]==''n'') { nors++; } if(str2[0]==''f'' && str2[1]=='' '') { poly++; } } pver=(float *)malloc(sizeof(float)*vers*3); if(pver==NULL) { return(3); } ptex=(float *)malloc(sizeof(float)*texs*2); if(ptex==NULL) { return(4); } pnor=(float *)malloc(sizeof(float)*nors*3); if(pnor==NULL) { return(5); } ppoly=(int *)malloc(sizeof(int)*poly*9); if(ppoly==NULL) { return(6); } rewind(file); while(!feof(file)) { fgets(str2,100,file); if(str2[0]==''v'' && str2[1]=='' '') { //load vertecies index=2; index2=0; while(str2[index]!='' '') { str_a[index2]=str2[index]; index++; index2++; } str_a[index2] = NULL; index2=0; index++; while(str2[index]!='' '') { str_b[index2]=str2[index]; index++; index2++; } str_b[index2] = NULL; index2=0; index++; while(str2[index]!=0) { str_c[index2]=str2[index]; index++; index2++; } str_c[index2] = NULL; pver[vertex_index ]=(float)atof(str_a); pver[vertex_index+1]=(float)atof(str_b); pver[vertex_index+2]=(float)atof(str_c); vertex_index+=3; } if(str2[0]==''v'' && str2[1]==''t'') { //load texture cords index=2; index2=0; while(str2[index]!='' '') { str_a[index2]=str2[index]; index++; index2++; } str_a[index2] = NULL; index2=0; index++; while(str2[index]!=0) { str_b[index2]=str2[index]; index++; index2++; } str_b[index2] = NULL; ptex[texture_index ]=(float)atof(str_a); ptex[texture_index+1]=(float)atof(str_b); texture_index+=2; } if(str2[0]==''v'' && str2[1]==''n'') { //load normals index=2; index2=0; while(str2[index]!='' '') { str_a[index2]=str2[index]; index++; index2++; } str_a[index2] = NULL; index2=0; index++; while(str2[index]!='' '') { str_b[index2]=str2[index]; index++; index2++; } str_b[index2] = NULL; index2=0; index++; while(str2[index]!=0) { str_c[index2]=str2[index]; index++; index2++; } str_c[index2] = NULL; pnor[normal_index ]=(float)atof(str_a); pnor[normal_index+1]=(float)atof(str_b); pnor[normal_index+2]=(float)atof(str_c); normal_index+=3; } if(str2[0]==''f'' && str2[1]=='' '') { /* //load polys index=2; index2=0; for(int x2=0;x2<9;x2++) { while(isdigit(str2[index])) { str3[index2]=str2[index]; index++; index2++; }//end while index++; ppoly[poly_index] = atoi(str3); --ppoly[poly_index++]; index2=0; }//end for */ //sorry, didn''t like the above sscanf(&str2[2],"%d/%d/%d %d/%d/%d %d/%d/%d", &ppoly[poly_index+2],&ppoly[poly_index+1],&ppoly[poly_index ], &ppoly[poly_index+5],&ppoly[poly_index+4],&ppoly[poly_index+3], &ppoly[poly_index+8],&ppoly[poly_index+7],&ppoly[poly_index+6]); for(int i=0;i<9;i++) { --ppoly[poly_index++]; } }//end if }//end while !feof fclose(file); obj->tex=texindex; obj->nump=poly; obj->vers=pver; obj->texcords=ptex; obj->normals=pnor; obj->polys=ppoly; return(0);} This topic is closed to new replies.
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