void CTmpBrush::Refresh() {
CUtlVector<TTmpFaceHelper> oldhelpers;
oldhelpers = m_helpers;
m_numFaces = m_polyhedron->iPolygonCount;
if(m_visible)
m_tmpTriangles.SetCountNonDestructively(m_numFaces);
m_helpers.SetCountNonDestructively(m_numFaces);
for(int i = 0; i < m_numFaces; i++) {
const Polyhedron_IndexedPolygon_t& polygon = m_polyhedron->pPolygons[i];
Assert(polygon.iIndexCount == 3);
const Vector * triPts[3];
for(int j = 0; j < 3; j++) {
triPts[j] = &GetPolygonVertex(m_polyhedron, polygon, j);
}
if(m_visible)
m_tmpTriangles[i].SetPoints(triPts);
//todo - we should modify helpers when rotating/scaling to avoid errors
ComputeTriangleNormal(*triPts[0], *triPts[1], *triPts[2], m_helpers[i].normal);
m_helpers[i].normal = -m_helpers[i].normal;
float bestdot = -1.0;
m_helpers[i].index = -1;
FOR_EACH_VEC(oldhelpers, it) {
float dot = DotProduct(oldhelpers[it].normal, m_helpers[i].normal);
if(dot > bestdot) {
bestdot = dot;
m_helpers[i].index = oldhelpers[it].index;
}
}
}
void CTriangleObj::ComputePolygonNormals(void)
{
int f;
if (m_pPolyNorm==NULL){
//this is modified for deformable surface
const int NSIZE = DETERMINE_DEFORMABLE_POLYSIZE(m_nPolygonCount);
m_pPolyNorm = new Vector3f[NSIZE];
assert(m_pPolyNorm!=NULL);
}
for (f=0; f<m_nPolygonCount; f++){
m_pPolyNorm[f]=ComputeTriangleNormal(f);
}
}
void CTriangleObj::ComputeVertexNormals(void)
{
int i;
Vector3f zero(0,0,0);
Vector3i* m_pTriangle = (Vector3i*)m_pPolygon;
if (m_pVertexNorm==NULL){
m_pVertexNorm = new Vector3f[m_nVertexCount];
assert(m_pVertexNorm!=NULL);
}
for (i=0; i<m_nVertexCount; i++) m_pVertexNorm[i]=zero;
//need the polygon normals
{
if (m_pPolyNorm==NULL){
//this is modified for deformable surface
const int NSIZE = DETERMINE_DEFORMABLE_POLYSIZE(m_nPolygonCount);
m_pPolyNorm = new Vector3f[NSIZE];
assert(m_pPolyNorm!=NULL);
}
for (int f=0; f<m_nPolygonCount; f++){
m_pPolyNorm[f]=ComputeTriangleNormal(f, true);
}
}
//==sum up
for (i=0; i<m_nPolygonCount; i++){
const Vector3i& t = m_pTriangle[i];
m_pVertexNorm[t.x]+= m_pPolyNorm[i];
m_pVertexNorm[t.y]+= m_pPolyNorm[i];
m_pVertexNorm[t.z]+= m_pPolyNorm[i];
}
for (i=0; i<m_nVertexCount; i++) m_pVertexNorm[i].normalize();
for (i=0; i<m_nPolygonCount; i++) m_pPolyNorm[i].normalize();
}
