Wow! Most impressive. I think an AC3D plugin that exports the format you want would probably be less complicated.
Here is the main code for a simple exporter.It would be easy to transform coordinates, add texture info, etc.
Code:
static void sv_output_triangle(FILE *f, List *vertices, Surface *s)
{
SVertex *p1, *p2, *p3;
int col;
int id1, id2, id3;
// get SVertexes for this triangle
// SVertex contains vertex pointer, texture cordinates and the normal
p1 = (SVertex *)(s->vertlist->data);
p2 = (SVertex *)(s->vertlist->next->data);
p3 = (SVertex *)(s->vertlist->next->next->data);
// get int positions of each vertex within the main object list
id1 = list_index(vertices, p1->v);
id2 = list_index(vertices, p2->v);
id3 = list_index(vertices, p3->v);
fprintf(f, "%d %d %d ", id1, id2, id3);
sv_output_col(f, s->col);
}
static void sv_output_surfaces(FILE *f, List *vertices, List *triangs)
{
/** go through the triangle list and output each **/
for (List *p = triangs; p != NULL; p = p->next)
{
Surface *s = (Surface *)p->data;
sv_output_triangle(f, vertices, s);
}
}
static void sv_output_object(FILE *f, ACObject *ob)
{
int numvert, numsurf, numkids;
List *vertices, *surfaces, *kids;
List *p;
printf("outputing %s\n", ac_object_get_name(ob));
ac_object_get_contents(ob, &numvert, &numsurf, &numkids,
&vertices, &surfaces, &kids);
// we are only interested in triangles, so we a list of triangulated surfaces
List *triangs = ac_object_get_triangle_surfaces(ob); // get list of triangles (ignores lines/polyline surfaces)
int numtri = list_count(triangs);
if (numtri > 0)
{
fprintf(f, "%d\n", numvert); // output number of vertices
for (p = vertices; p != NULL; p = p->next) // output each vertex
{
Vertex *v = (Vertex *)p->data;
fprintf(f, "%f %f %f\n", v->x, v->y, v->z);
}
fprintf(f, "%d\n", numtri); /** output the number of triangles **/
sv_output_surfaces(f, vertices, triangs); // output number of surfaces and each surface
}
ac_surfacelist_free(&triangs); // important - free the surfaces (and list) created from ac_object_get_triangle_surfaces
for (p = kids; p != NULL; p = p->next) // output any children objects
sv_output_object(f, (ACObject *)p->data);
}