static bool MakeNormalMesh(plMaxNode *node, plMaxMeshExtractor::NeutralMesh& mesh, Matrix3* w2l)
{
TriObject *pDeleteMe = nil;
Mesh *pMesh = ExtractMesh(node, &pDeleteMe); // allocates *sometimes*; check pDeleteMe
if (!pMesh)
return false;
Matrix3 fullTM = node->GetObjectTM(0);
int parity = fullTM.Parity();
mesh.fNumVerts = pMesh->numVerts;
mesh.fVerts = new hsPoint3[mesh.fNumVerts];
for (int i = 0; i < mesh.fNumVerts; i++)
{
// convert the vertex to global coordinates
Point3 newVert = fullTM * pMesh->verts[i];
// convert the vertex to the new (requested) coordinate system
if (w2l)
newVert = (*w2l) * newVert;
mesh.fVerts[i].Set(newVert.x, newVert.y, newVert.z);
}
mesh.fNumFaces = pMesh->numFaces;
mesh.fFaces = new uint16_t[mesh.fNumFaces*3];
for (int i = 0; i < mesh.fNumFaces; i++)
{
Face* pFace = &pMesh->faces[i];
uint16_t* pNFace = &mesh.fFaces[i * 3];
pNFace[0] = pFace->v[ parity ? 2 : 0 ]; // reverse winding if parity backwards
pNFace[1] = pFace->v[1];
pNFace[2] = pFace->v[ parity ? 0 : 2 ]; // ''
}
if (pDeleteMe)
delete pDeleteMe;
return true;
}
void LightMesh::AddMesh(Mesh *m, Matrix3 basetm, ViewExp *vpt, BOOL buildVNorms)
{
//copy over the vert and face data
vertsViewSpace.SetCount(m->numVerts);
for (int i =0; i < m->numVerts; i++)
vertsViewSpace[i] = m->verts[i];
vertsWorldSpace = vertsViewSpace;
BOOL flip = basetm.Parity();//check to see if the mesh has been mirrored if so flip stuff;
faces.SetCount(m->numFaces);
for (i =0; i < m->numFaces; i++)
{
faces[i] = m->faces[i];
if (flip)
{
int a = faces[i].v[0];
int b = faces[i].v[1];
int c = faces[i].v[2];
faces[i].v[0] = c;
faces[i].v[1] = b;
faces[i].v[2] = a;
}
}
toWorldSpace = basetm;
toLocalSpace = Inverse(basetm);
for (i =0; i < m->numVerts; i++)
vertsWorldSpace[i] = vertsWorldSpace[i]*basetm;
bb.Init();
//build vnorms and fnorms
Mesh *mesh;
mesh = m;
Face *face;
Point3 v0, v1, v2;
// face = m->faces;
face = faces.Addr(0);
// fnorms.SetCount(m->getNumFaces());
GraphicsWindow *gw = vpt->getGW();
Matrix3 tm;
vpt->GetAffineTM(tm);
gw->setTransform(Matrix3(1));
Point3 *verts = vertsViewSpace.Addr(0);
int vertCount = vertsViewSpace.Count();
for (i =0; i < vertCount; i++)
{
Point3 inPoint,outPoint;
inPoint = *verts * basetm;
DWORD flag = gw->transPoint(&inPoint, &outPoint);
inPoint = inPoint * tm;
*verts = outPoint ;
(*verts).z = inPoint.z;
bb += *verts;
verts++;
}
// Compute face and vertex surface normals
faceVisible.SetSize(m->getNumFaces());
faceVisible.ClearAll();
for (i = 0; i < m->getNumFaces(); i++, face++)
{
// Calculate the surface normal
Point3 norm;
v0 = vertsViewSpace[face->v[0]];
v1 = vertsViewSpace[face->v[1]];
v2 = vertsViewSpace[face->v[2]];
norm = (v1-v0)^(v2-v1);
if (norm.z < 0.0f)
{
if (face->Hidden())
faceVisible.Set(i,FALSE);
else faceVisible.Set(i,TRUE);
}
else faceVisible.Set(i,FALSE);
}
if (buildVNorms)
{
face = faces.Addr(0);
Tab<int> normCount;
normCount.SetCount(m->numVerts);
vnorms.SetCount(m->numVerts);
for (i = 0; i < m->numVerts; i++)
{
vnorms[i] = Point3(0.0f,0.0f,0.0f);
normCount[i] = 0;
}
for (i = 0; i < mesh->getNumFaces(); i++, face++)
{
// Calculate the surface normal
v0 = vertsWorldSpace[face->v[0]];
v1 = vertsWorldSpace[face->v[1]];
v2 = vertsWorldSpace[face->v[2]];
for (int j=0; j<3; j++)
{
vnorms[face->v[j]]+=Normalize((v1-v0)^(v2-v1));
normCount[face->v[j]]++;
}
}
for (i = 0; i < m->numVerts; i++)
{
if (normCount[i]!=0)
vnorms[i] = Normalize(vnorms[i]/(float)normCount[i]);
}
}
else
{
vnorms.ZeroCount();
vnorms.Resize(0);
}
}