Hi all
These few fixes adds custom smoothing angle to normal calculation. The extra
line of code checks if the touching face normal is less than 'smooth angle'
away from face normal in question.
- Jesper Knudsen
void
//--> (1) new smooth angle argument
lib3ds_mesh_calculate_normals(Lib3dsMesh *mesh, Lib3dsVector *normalL ,
Lib3dsFloat smoothangle_deg )
{
//--> (2) treshold for smoothing
Lib3dsFloat alimit = (float)cos(smoothangle_deg*1.74532925199432958e-2 );
Lib3dsFaces **fl;
Lib3dsFaces *fa;
unsigned i,j,k;
if (!mesh->faces) {
return;
}
//...
//...
//...
ASSERT(f->points[j]<mesh->points);
if (f->smoothing) {
lib3ds_vector_zero(n);
k=0;
for (p=fl[f->points[j]]; p; p=p->next) {
found=0;
for (l=0; l<k; ++l) {
if (fabs(lib3ds_vector_dot(N[l], p->face->normal)-1.0)<1e-5) {
found=1;
break;
}
}
if (!found) {
//--> (3) 'f->smoothing' removed, wouldn't be here if false
if (p->face->smoothing) {
//--> (4) dot this face and neighbor face
Lib3dsFloat dot = lib3ds_vector_dot(f->normal,p->face->normal
);
//--> (5) only consider this neighbor face, if angle is close enough
if( dot > alimit )
{
lib3ds_vector_add(n,n, p->face->normal);
lib3ds_vector_copy(N[k], p->face->normal);
++k;
}
}
}
}
}
//...
//...
//...
}
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