void NvStripifier::Stripify(const WordVec &in_indices, const int in_cacheSize,
const int in_minStripLength, const unsigned short maxIndex,
NvStripInfoVec &outStrips, NvFaceInfoVec& outFaceList)
{
meshJump = 0.0f;
bFirstTimeResetPoint = true; //used in FindGoodResetPoint()
//the number of times to run the experiments
int numSamples = 10;
int i;
//the cache size, clamped to one
cacheSize = max(1, in_cacheSize - CACHE_INEFFICIENCY);
minStripLength = in_minStripLength; //this is the strip size threshold below which we dump the strip into a list
indices = in_indices;
// build the stripification info
NvFaceInfoVec allFaceInfos;
NvEdgeInfoVec allEdgeInfos;
BuildStripifyInfo(allFaceInfos, allEdgeInfos, maxIndex);
NvStripInfoVec allStrips;
// stripify
FindAllStrips(allStrips, allFaceInfos, allEdgeInfos, numSamples);
//split up the strips into cache friendly pieces, optimize them, then dump these into outStrips
SplitUpStripsAndOptimize(allStrips, outStrips, allEdgeInfos, outFaceList);
//clean up
for(i = 0; i < allStrips.size(); i++)
{
delete allStrips[i];
}
for (i = 0; i < allEdgeInfos.size(); i++)
{
NvEdgeInfo *info = allEdgeInfos[i];
while (info != NULL)
{
NvEdgeInfo *next = (info->m_v0 == i ? info->m_nextV0 : info->m_nextV1);
info->Unref();
info = next;
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////
// BuildStripifyInfo()
//
// Builds the list of all face and edge infos
//
void NvStripifier::BuildStripifyInfo(NvFaceInfoVec &faceInfos, NvEdgeInfoVec &edgeInfos,
const unsigned short maxIndex)
{
// reserve space for the face infos, but do not resize them.
int numIndices = indices.size();
faceInfos.reserve(numIndices / 3);
// we actually resize the edge infos, so we must initialize to NULL
edgeInfos.resize(maxIndex + 1);
for (unsigned short i = 0; i < maxIndex + 1; i++)
edgeInfos[i] = NULL;
// iterate through the triangles of the triangle list
int numTriangles = numIndices / 3;
int index = 0;
bool bFaceUpdated[3];
for (int i = 0; i < numTriangles; i++)
{
bool bMightAlreadyExist = true;
bFaceUpdated[0] = false;
bFaceUpdated[1] = false;
bFaceUpdated[2] = false;
// grab the indices
int v0 = indices[index++];
int v1 = indices[index++];
int v2 = indices[index++];
//we disregard degenerates
if(IsDegenerate(v0, v1, v2))
continue;
// create the face info and add it to the list of faces, but only if this exact face doesn't already
// exist in the list
NvFaceInfo *faceInfo = new NvFaceInfo(v0, v1, v2);
// grab the edge infos, creating them if they do not already exist
NvEdgeInfo *edgeInfo01 = FindEdgeInfo(edgeInfos, v0, v1);
if (edgeInfo01 == NULL)
{
//since one of it's edges isn't in the edge data structure, it can't already exist in the face structure
bMightAlreadyExist = false;
// create the info
edgeInfo01 = new NvEdgeInfo(v0, v1);
// update the linked list on both
edgeInfo01->m_nextV0 = edgeInfos[v0];
edgeInfo01->m_nextV1 = edgeInfos[v1];
edgeInfos[v0] = edgeInfo01;
edgeInfos[v1] = edgeInfo01;
// set face 0
edgeInfo01->m_face0 = faceInfo;
}
else
{
if (edgeInfo01->m_face1 != NULL)
{
printf("BuildStripifyInfo: > 2 triangles on an edge... uncertain consequences\n");
}
else
{
edgeInfo01->m_face1 = faceInfo;
bFaceUpdated[0] = true;
}
}
// grab the edge infos, creating them if they do not already exist
NvEdgeInfo *edgeInfo12 = FindEdgeInfo(edgeInfos, v1, v2);
if (edgeInfo12 == NULL)
{
bMightAlreadyExist = false;
// create the info
edgeInfo12 = new NvEdgeInfo(v1, v2);
// update the linked list on both
edgeInfo12->m_nextV0 = edgeInfos[v1];
edgeInfo12->m_nextV1 = edgeInfos[v2];
edgeInfos[v1] = edgeInfo12;
edgeInfos[v2] = edgeInfo12;
// set face 0
edgeInfo12->m_face0 = faceInfo;
}
else
{
if (edgeInfo12->m_face1 != NULL)
{
printf("BuildStripifyInfo: > 2 triangles on an edge... uncertain consequences\n");
}
else
{
edgeInfo12->m_face1 = faceInfo;
bFaceUpdated[1] = true;
}
}
// grab the edge infos, creating them if they do not already exist
NvEdgeInfo *edgeInfo20 = FindEdgeInfo(edgeInfos, v2, v0);
if (edgeInfo20 == NULL)
{
bMightAlreadyExist = false;
// create the info
edgeInfo20 = new NvEdgeInfo(v2, v0);
// update the linked list on both
edgeInfo20->m_nextV0 = edgeInfos[v2];
edgeInfo20->m_nextV1 = edgeInfos[v0];
edgeInfos[v2] = edgeInfo20;
edgeInfos[v0] = edgeInfo20;
// set face 0
edgeInfo20->m_face0 = faceInfo;
}
else
{
if (edgeInfo20->m_face1 != NULL)
{
printf("BuildStripifyInfo: > 2 triangles on an edge... uncertain consequences\n");
}
else
{
edgeInfo20->m_face1 = faceInfo;
bFaceUpdated[2] = true;
}
}
if(bMightAlreadyExist)
{
if(!AlreadyExists(faceInfo, faceInfos))
faceInfos.push_back(faceInfo);
else
{
delete faceInfo;
//cleanup pointers that point to this deleted face
if(bFaceUpdated[0])
edgeInfo01->m_face1 = NULL;
if(bFaceUpdated[1])
edgeInfo12->m_face1 = NULL;
if(bFaceUpdated[2])
edgeInfo20->m_face1 = NULL;
}
}
else
{
faceInfos.push_back(faceInfo);
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////
// BuildStripifyInfo()
//
// Builds the list of all face and edge infos
//
void NvStripifier::BuildStripifyInfo(NvFaceInfoVec &faceInfos, NvEdgeInfoVec &edgeInfos){
// reserve space for the face infos, but do not resize them.
int numIndices = indices.size();
faceInfos.reserve(numIndices);
// we actually resize the edge infos, so we must initialize to NULL
edgeInfos.resize (numIndices);
for (int i = 0; i < numIndices; i++)
edgeInfos[i] = NULL;
// iterate through the triangles of the triangle list
int numTriangles = numIndices / 3;
int index = 0;
for (u32 i = 0; i < numTriangles; i++)
{
// grab the indices
int v0 = indices[index++];
int v1 = indices[index++];
int v2 = indices[index++];
// create the face info and add it to the list of faces, but only if this exact face doesn't already
// exist in the list
NvFaceInfo *faceInfo = xr_new<NvFaceInfo>(v0, v1, v2);
if(!AlreadyExists(faceInfo, faceInfos))
{
faceInfos.push_back(faceInfo);
// grab the edge infos, creating them if they do not already exist
NvEdgeInfo *edgeInfo01 = FindEdgeInfo(edgeInfos, v0, v1);
if (edgeInfo01 == NULL){
// create the info
edgeInfo01 = xr_new<NvEdgeInfo>(v0, v1);
// update the linked list on both
edgeInfo01->m_nextV0 = edgeInfos[v0];
edgeInfo01->m_nextV1 = edgeInfos[v1];
edgeInfos[v0] = edgeInfo01;
edgeInfos[v1] = edgeInfo01;
// set face 0
edgeInfo01->m_face0 = faceInfo;
}
else {
if (edgeInfo01->m_face1 != NULL) ;
//Msg("! WARNING: BuildStripifyInfo: > 2 triangles on an edge... uncertain consequences");
else
edgeInfo01->m_face1 = faceInfo;
}
// grab the edge infos, creating them if they do not already exist
NvEdgeInfo *edgeInfo12 = FindEdgeInfo(edgeInfos, v1, v2);
if (edgeInfo12 == NULL){
// create the info
edgeInfo12 = xr_new<NvEdgeInfo> (v1, v2);
// update the linked list on both
edgeInfo12->m_nextV0 = edgeInfos[v1];
edgeInfo12->m_nextV1 = edgeInfos[v2];
edgeInfos[v1] = edgeInfo12;
edgeInfos[v2] = edgeInfo12;
// set face 0
edgeInfo12->m_face0 = faceInfo;
}
else {
if (edgeInfo12->m_face1 != NULL) ;
//Msg("! WARNING: BuildStripifyInfo: > 2 triangles on an edge... uncertain consequences");
else
edgeInfo12->m_face1 = faceInfo;
}
// grab the edge infos, creating them if they do not already exist
NvEdgeInfo *edgeInfo20 = FindEdgeInfo(edgeInfos, v2, v0);
if (edgeInfo20 == NULL){
// create the info
edgeInfo20 = xr_new<NvEdgeInfo>(v2, v0);
// update the linked list on both
edgeInfo20->m_nextV0 = edgeInfos[v2];
edgeInfo20->m_nextV1 = edgeInfos[v0];
edgeInfos[v2] = edgeInfo20;
edgeInfos[v0] = edgeInfo20;
// set face 0
edgeInfo20->m_face0 = faceInfo;
}
else {
if (edgeInfo20->m_face1 != NULL) ;
//Msg("! WARNING: BuildStripifyInfo: > 2 triangles on an edge... uncertain consequences");
else
edgeInfo20->m_face1 = faceInfo;
}
}
}
}