fix
iamAdrianIusca
parent
871f3fd337
commit
e5f69d55bb
|
|
@ -44,6 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|||
|
||||
|
||||
#include "LimitBoneWeightsProcess.h"
|
||||
#include <assimp/SmallVector.h>
|
||||
#include <assimp/StringUtils.h>
|
||||
#include <assimp/postprocess.h>
|
||||
#include <assimp/DefaultLogger.hpp>
|
||||
|
|
@ -52,150 +53,140 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|||
|
||||
using namespace Assimp;
|
||||
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
// Constructor to be privately used by Importer
|
||||
LimitBoneWeightsProcess::LimitBoneWeightsProcess()
|
||||
{
|
||||
mMaxWeights = AI_LMW_MAX_WEIGHTS;
|
||||
mMaxWeights = AI_LMW_MAX_WEIGHTS;
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
// Destructor, private as well
|
||||
LimitBoneWeightsProcess::~LimitBoneWeightsProcess()
|
||||
{
|
||||
// nothing to do here
|
||||
// nothing to do here
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
// Returns whether the processing step is present in the given flag field.
|
||||
bool LimitBoneWeightsProcess::IsActive( unsigned int pFlags) const
|
||||
{
|
||||
return (pFlags & aiProcess_LimitBoneWeights) != 0;
|
||||
return (pFlags & aiProcess_LimitBoneWeights) != 0;
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
// Executes the post processing step on the given imported data.
|
||||
void LimitBoneWeightsProcess::Execute( aiScene* pScene) {
|
||||
ASSIMP_LOG_DEBUG("LimitBoneWeightsProcess begin");
|
||||
for (unsigned int a = 0; a < pScene->mNumMeshes; ++a ) {
|
||||
ProcessMesh(pScene->mMeshes[a]);
|
||||
}
|
||||
void LimitBoneWeightsProcess::Execute( aiScene* pScene)
|
||||
{
|
||||
ASSIMP_LOG_DEBUG("LimitBoneWeightsProcess begin");
|
||||
|
||||
ASSIMP_LOG_DEBUG("LimitBoneWeightsProcess end");
|
||||
for (unsigned int m = 0; m < pScene->mNumMeshes; ++m) {
|
||||
ProcessMesh(pScene->mMeshes[m]);
|
||||
}
|
||||
|
||||
ASSIMP_LOG_DEBUG("LimitBoneWeightsProcess end");
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
// Executes the post processing step on the given imported data.
|
||||
void LimitBoneWeightsProcess::SetupProperties(const Importer* pImp)
|
||||
{
|
||||
// get the current value of the property
|
||||
this->mMaxWeights = pImp->GetPropertyInteger(AI_CONFIG_PP_LBW_MAX_WEIGHTS,AI_LMW_MAX_WEIGHTS);
|
||||
// get the current value of the property
|
||||
this->mMaxWeights = pImp->GetPropertyInteger(AI_CONFIG_PP_LBW_MAX_WEIGHTS,AI_LMW_MAX_WEIGHTS);
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
// Unites identical vertices in the given mesh
|
||||
void LimitBoneWeightsProcess::ProcessMesh( aiMesh* pMesh)
|
||||
void LimitBoneWeightsProcess::ProcessMesh(aiMesh* pMesh)
|
||||
{
|
||||
if( !pMesh->HasBones())
|
||||
return;
|
||||
if (!pMesh->HasBones())
|
||||
return;
|
||||
|
||||
// collect all bone weights per vertex
|
||||
typedef std::vector< std::vector< Weight > > WeightsPerVertex;
|
||||
WeightsPerVertex vertexWeights( pMesh->mNumVertices);
|
||||
// collect all bone weights per vertex
|
||||
typedef SmallVector<Weight,8> VertexWeightArray;
|
||||
typedef std::vector<VertexWeightArray> WeightsPerVertex;
|
||||
WeightsPerVertex vertexWeights(pMesh->mNumVertices);
|
||||
size_t maxVertexWeights = 0;
|
||||
|
||||
// collect all weights per vertex
|
||||
for( unsigned int a = 0; a < pMesh->mNumBones; a++)
|
||||
{
|
||||
const aiBone* bone = pMesh->mBones[a];
|
||||
for( unsigned int b = 0; b < bone->mNumWeights; b++)
|
||||
{
|
||||
const aiVertexWeight& w = bone->mWeights[b];
|
||||
vertexWeights[w.mVertexId].emplace_back( a, w.mWeight);
|
||||
}
|
||||
}
|
||||
for (unsigned int b = 0; b < pMesh->mNumBones; ++b)
|
||||
{
|
||||
const aiBone* bone = pMesh->mBones[b];
|
||||
for (unsigned int w = 0; w < bone->mNumWeights; ++w)
|
||||
{
|
||||
const aiVertexWeight& vw = bone->mWeights[w];
|
||||
vertexWeights[vw.mVertexId].push_back(Weight(b, vw.mWeight));
|
||||
maxVertexWeights = std::max(maxVertexWeights, vertexWeights[vw.mVertexId].size());
|
||||
}
|
||||
}
|
||||
|
||||
unsigned int removed = 0, old_bones = pMesh->mNumBones;
|
||||
if (maxVertexWeights <= mMaxWeights)
|
||||
return;
|
||||
|
||||
// now cut the weight count if it exceeds the maximum
|
||||
bool bChanged = false;
|
||||
for( WeightsPerVertex::iterator vit = vertexWeights.begin(); vit != vertexWeights.end(); ++vit)
|
||||
{
|
||||
if( vit->size() <= mMaxWeights)
|
||||
continue;
|
||||
unsigned int removed = 0, old_bones = pMesh->mNumBones;
|
||||
|
||||
bChanged = true;
|
||||
// now cut the weight count if it exceeds the maximum
|
||||
for (WeightsPerVertex::iterator vit = vertexWeights.begin(); vit != vertexWeights.end(); ++vit)
|
||||
{
|
||||
if (vit->size() <= mMaxWeights)
|
||||
continue;
|
||||
|
||||
// more than the defined maximum -> first sort by weight in descending order. That's
|
||||
// why we defined the < operator in such a weird way.
|
||||
std::sort( vit->begin(), vit->end());
|
||||
// more than the defined maximum -> first sort by weight in descending order. That's
|
||||
// why we defined the < operator in such a weird way.
|
||||
std::sort(vit->begin(), vit->end());
|
||||
|
||||
// now kill everything beyond the maximum count
|
||||
unsigned int m = static_cast<unsigned int>(vit->size());
|
||||
vit->erase( vit->begin() + mMaxWeights, vit->end());
|
||||
removed += static_cast<unsigned int>(m-vit->size());
|
||||
// now kill everything beyond the maximum count
|
||||
unsigned int m = static_cast<unsigned int>(vit->size());
|
||||
vit->resize(mMaxWeights);
|
||||
removed += static_cast<unsigned int>(m - vit->size());
|
||||
|
||||
// and renormalize the weights
|
||||
float sum = 0.0f;
|
||||
for( std::vector<Weight>::const_iterator it = vit->begin(); it != vit->end(); ++it ) {
|
||||
sum += it->mWeight;
|
||||
}
|
||||
if( 0.0f != sum ) {
|
||||
const float invSum = 1.0f / sum;
|
||||
for( std::vector<Weight>::iterator it = vit->begin(); it != vit->end(); ++it ) {
|
||||
it->mWeight *= invSum;
|
||||
}
|
||||
}
|
||||
}
|
||||
// and renormalize the weights
|
||||
float sum = 0.0f;
|
||||
for(const Weight* it = vit->begin(); it != vit->end(); ++it) {
|
||||
sum += it->mWeight;
|
||||
}
|
||||
if (0.0f != sum) {
|
||||
const float invSum = 1.0f / sum;
|
||||
for(Weight* it = vit->begin(); it != vit->end(); ++it) {
|
||||
it->mWeight *= invSum;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (bChanged) {
|
||||
// rebuild the vertex weight array for all bones
|
||||
typedef std::vector< std::vector< aiVertexWeight > > WeightsPerBone;
|
||||
WeightsPerBone boneWeights( pMesh->mNumBones);
|
||||
for( unsigned int a = 0; a < vertexWeights.size(); a++)
|
||||
{
|
||||
const std::vector<Weight>& vw = vertexWeights[a];
|
||||
for( std::vector<Weight>::const_iterator it = vw.begin(); it != vw.end(); ++it)
|
||||
boneWeights[it->mBone].emplace_back( a, it->mWeight);
|
||||
}
|
||||
// clear weight count for all bone
|
||||
for (unsigned int a = 0; a < pMesh->mNumBones; ++a)
|
||||
{
|
||||
pMesh->mBones[a]->mNumWeights = 0;
|
||||
}
|
||||
|
||||
// and finally copy the vertex weight list over to the mesh's bones
|
||||
std::vector<bool> abNoNeed(pMesh->mNumBones,false);
|
||||
bChanged = false;
|
||||
// rebuild the vertex weight array for all bones
|
||||
for (unsigned int a = 0; a < vertexWeights.size(); ++a)
|
||||
{
|
||||
const VertexWeightArray& vw = vertexWeights[a];
|
||||
for (const Weight* it = vw.begin(); it != vw.end(); ++it)
|
||||
{
|
||||
aiBone* bone = pMesh->mBones[it->mBone];
|
||||
bone->mWeights[bone->mNumWeights++] = aiVertexWeight(a, it->mWeight);
|
||||
}
|
||||
}
|
||||
|
||||
for( unsigned int a = 0; a < pMesh->mNumBones; a++)
|
||||
{
|
||||
const std::vector<aiVertexWeight>& bw = boneWeights[a];
|
||||
aiBone* bone = pMesh->mBones[a];
|
||||
// remove empty bones
|
||||
unsigned int writeBone = 0;
|
||||
|
||||
if ( bw.empty() )
|
||||
{
|
||||
abNoNeed[a] = bChanged = true;
|
||||
continue;
|
||||
}
|
||||
for (unsigned int readBone = 0; readBone< pMesh->mNumBones; ++readBone)
|
||||
{
|
||||
aiBone* bone = pMesh->mBones[readBone];
|
||||
if (bone->mNumWeights > 0)
|
||||
{
|
||||
pMesh->mBones[writeBone++] = bone;
|
||||
}
|
||||
else
|
||||
{
|
||||
delete bone;
|
||||
}
|
||||
}
|
||||
pMesh->mNumBones = writeBone;
|
||||
|
||||
// copy the weight list. should always be less weights than before, so we don't need a new allocation
|
||||
ai_assert( bw.size() <= bone->mNumWeights);
|
||||
bone->mNumWeights = static_cast<unsigned int>( bw.size() );
|
||||
::memcpy( bone->mWeights, &bw[0], bw.size() * sizeof( aiVertexWeight));
|
||||
}
|
||||
|
||||
if (bChanged) {
|
||||
// the number of new bones is smaller than before, so we can reuse the old array
|
||||
aiBone** ppcCur = pMesh->mBones;aiBone** ppcSrc = ppcCur;
|
||||
|
||||
for (std::vector<bool>::const_iterator iter = abNoNeed.begin();iter != abNoNeed.end() ;++iter) {
|
||||
if (*iter) {
|
||||
delete *ppcSrc;
|
||||
--pMesh->mNumBones;
|
||||
}
|
||||
else *ppcCur++ = *ppcSrc;
|
||||
++ppcSrc;
|
||||
}
|
||||
}
|
||||
|
||||
if (!DefaultLogger::isNullLogger()) {
|
||||
ASSIMP_LOG_INFO_F("Removed ", removed, " weights. Input bones: ", old_bones, ". Output bones: ", pMesh->mNumBones );
|
||||
}
|
||||
}
|
||||
if (!DefaultLogger::isNullLogger()) {
|
||||
ASSIMP_LOG_INFO_F("Removed ", removed, " weights. Input bones: ", old_bones, ". Output bones: ", pMesh->mNumBones);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue