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struct obj;
struct obj : vertmodel, vertloader<obj>
{
obj(const char *name) : vertmodel(name) {}
static const char *formatname() { return "obj"; }
static bool animated() { return false; }
int type() const { return MDL_OBJ; }
struct objmeshgroup : vertmeshgroup
{
void parsevert(char *s, vector<vec> &out)
{
vec &v = out.add(vec(0, 0, 0));
while(isalpha(*s)) s++;
loopi(3)
{
v[i] = strtod(s, &s);
while(isspace(*s)) s++;
if(!*s) break;
}
}
bool load(const char *filename, float smooth)
{
int len = strlen(filename);
if(len < 4 || strcasecmp(&filename[len-4], ".obj")) return false;
stream *file = openfile(filename, "rb");
if(!file) return false;
name = newstring(filename);
numframes = 1;
vector<vec> attrib[3];
char buf[512];
hashtable<ivec, int> verthash;
vector<vert> verts;
vector<tcvert> tcverts;
vector<tri> tris;
#define STARTMESH do { \
vertmesh &m = *new vertmesh; \
m.group = this; \
m.name = meshname[0] ? newstring(meshname) : NULL; \
meshes.add(&m); \
curmesh = &m; \
verthash.clear(); \
verts.setsize(0); \
tcverts.setsize(0); \
tris.setsize(0); \
} while(0)
#define FLUSHMESH do { \
curmesh->numverts = verts.length(); \
if(verts.length()) \
{ \
curmesh->verts = new vert[verts.length()]; \
memcpy(curmesh->verts, verts.getbuf(), verts.length()*sizeof(vert)); \
curmesh->tcverts = new tcvert[verts.length()]; \
memcpy(curmesh->tcverts, tcverts.getbuf(), tcverts.length()*sizeof(tcvert)); \
} \
curmesh->numtris = tris.length(); \
if(tris.length()) \
{ \
curmesh->tris = new tri[tris.length()]; \
memcpy(curmesh->tris, tris.getbuf(), tris.length()*sizeof(tri)); \
} \
if(attrib[2].empty()) \
{ \
if(smooth <= 1) curmesh->smoothnorms(smooth); \
else curmesh->buildnorms(); \
} \
} while(0)
string meshname = "";
vertmesh *curmesh = NULL;
while(file->getline(buf, sizeof(buf)))
{
char *c = buf;
while(isspace(*c)) c++;
switch(*c)
{
case '#': continue;
case 'v':
if(isspace(c[1])) parsevert(c, attrib[0]);
else if(c[1]=='t') parsevert(c, attrib[1]);
else if(c[1]=='n') parsevert(c, attrib[2]);
break;
case 'g':
{
while(isalpha(*c)) c++;
while(isspace(*c)) c++;
char *name = c;
size_t namelen = strlen(name);
while(namelen > 0 && isspace(name[namelen-1])) namelen--;
copystring(meshname, name, min(namelen+1, sizeof(meshname)));
if(curmesh) FLUSHMESH;
curmesh = NULL;
break;
}
case 'f':
{
if(!curmesh) STARTMESH;
int v0 = -1, v1 = -1;
while(isalpha(*c)) c++;
for(;;)
{
while(isspace(*c)) c++;
if(!*c) break;
ivec vkey(-1, -1, -1);
loopi(3)
{
vkey[i] = strtol(c, &c, 10);
if(vkey[i] < 0) vkey[i] = attrib[i].length() + vkey[i];
else vkey[i]--;
if(!attrib[i].inrange(vkey[i])) vkey[i] = -1;
if(*c!='/') break;
c++;
}
int *index = verthash.access(vkey);
if(!index)
{
index = &verthash[vkey];
*index = verts.length();
vert &v = verts.add();
v.pos = vkey.x < 0 ? vec(0, 0, 0) : attrib[0][vkey.x];
v.pos = vec(v.pos.z, -v.pos.x, v.pos.y);
v.norm = vkey.z < 0 ? vec(0, 0, 0) : attrib[2][vkey.z];
v.norm = vec(v.norm.z, -v.norm.x, v.norm.y);
tcvert &tcv = tcverts.add();
if(vkey.y < 0) tcv.u = tcv.v = 0;
else { tcv.u = attrib[1][vkey.y].x; tcv.v = 1-attrib[1][vkey.y].y; }
}
if(v0 < 0) v0 = *index;
else if(v1 < 0) v1 = *index;
else
{
tri &t = tris.add();
t.vert[0] = ushort(*index);
t.vert[1] = ushort(v1);
t.vert[2] = ushort(v0);
v1 = *index;
}
}
break;
}
}
}
if(curmesh) FLUSHMESH;
delete file;
return true;
}
};
meshgroup *loadmeshes(const char *name, va_list args)
{
objmeshgroup *group = new objmeshgroup;
if(!group->load(name, va_arg(args, double))) { delete group; return NULL; }
return group;
}
bool loaddefaultparts()
{
part &mdl = *new part;
parts.add(&mdl);
mdl.model = this;
mdl.index = 0;
const char *pname = parentdir(loadname);
defformatstring(name1)("packages/models/%s/tris.obj", loadname);
mdl.meshes = sharemeshes(path(name1), 2.0);
if(!mdl.meshes)
{
defformatstring(name2)("packages/models/%s/tris.obj", pname); // try obj in parent folder (vert sharing)
mdl.meshes = sharemeshes(path(name2), 2.0);
if(!mdl.meshes) return false;
}
Texture *tex, *masks;
loadskin(loadname, pname, tex, masks);
mdl.initskins(tex, masks);
if(tex==notexture) conoutf("could not load model skin for %s", name1);
return true;
}
bool load()
{
if(loaded) return true;
formatstring(dir)("packages/models/%s", loadname);
defformatstring(cfgname)("packages/models/%s/obj.cfg", loadname);
loading = this;
identflags &= ~IDF_PERSIST;
if(execfile(cfgname, false) && parts.length()) // configured obj, will call the obj* commands below
{
identflags |= IDF_PERSIST;
loading = NULL;
loopv(parts) if(!parts[i]->meshes) return false;
}
else // obj without configuration, try default tris and skin
{
identflags |= IDF_PERSIST;
loading = NULL;
if(!loaddefaultparts()) return false;
}
scale /= 4;
translate.y = -translate.y;
parts[0]->translate = translate;
loopv(parts) parts[i]->meshes->shared++;
return loaded = true;
}
};
vertcommands<obj> objcommands;
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