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/**
* @file llskinningutil.cpp
* @brief Functions for mesh object skinning
* @author vir@lindenlab.com
*
* $LicenseInfo:firstyear=2015&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2015, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "llviewerprecompiledheaders.h"
#include "llskinningutil.h"
#include "llvoavatar.h"
#include "llviewercontrol.h"
#include "llmeshrepository.h"
#include "llvolume.h"
#include "llrigginginfo.h"
void LLSkinningUtil::initClass()
{
}
U32 LLSkinningUtil::getMaxJointCount()
{
U32 result = LL_MAX_JOINTS_PER_MESH_OBJECT;
return result;
}
U32 LLSkinningUtil::getMeshJointCount(const LLMeshSkinInfo *skin)
{
return llmin((U32)getMaxJointCount(), (U32)skin->mJointNames.size());
}
void LLSkinningUtil::scrubInvalidJoints(LLVOAvatar *avatar, LLMeshSkinInfo* skin)
{
if (skin->mInvalidJointsScrubbed)
{
return;
}
for (U32 j = 0; j < skin->mJointNames.size(); ++j)
{
// Fix invalid names to "mPelvis". Currently meshes with
// invalid names will be blocked on upload, so this is just
// needed for handling of any legacy bad data.
if (!avatar->getJoint(skin->mJointNames[j]))
{
LL_DEBUGS("Avatar") << "Mesh rigged to invalid joint" << skin->mJointNames[j] << LL_ENDL;
LL_WARNS_ONCE("Avatar") << "Mesh rigged to invalid joint" << skin->mJointNames[j] << LL_ENDL;
skin->mJointNames[j] = "mPelvis";
}
}
skin->mInvalidJointsScrubbed = true;
}
void LLSkinningUtil::initSkinningMatrixPalette(
LLMatrix4* mat,
S32 count,
const LLMeshSkinInfo* skin,
LLVOAvatar *avatar)
{
initJointNums(const_cast<LLMeshSkinInfo*>(skin), avatar);
for (U32 j = 0; j < count; ++j)
{
LLJoint *joint = avatar->getJoint(skin->mJointNums[j]);
if (joint)
{
#define MAT_USE_SSE
#ifdef MAT_USE_SSE
LLMatrix4a bind, world, res;
bind.loadu(skin->mInvBindMatrix[j]);
world.loadu(joint->getWorldMatrix());
matMul(bind,world,res);
memcpy(mat[j].mMatrix,res.mMatrix,16*sizeof(float));
#else
mat[j] = skin->mInvBindMatrix[j];
mat[j] *= joint->getWorldMatrix();
#endif
}
else
{
mat[j] = skin->mInvBindMatrix[j];
// This shouldn't happen - in mesh upload, skinned
// rendering should be disabled unless all joints are
// valid. In other cases of skinned rendering, invalid
// joints should already have been removed during scrubInvalidJoints().
LL_WARNS_ONCE("Avatar") << "Rigged to invalid joint name " << skin->mJointNames[j] << LL_ENDL;
LL_WARNS_ONCE() << "avatar build state: isBuilt() " << avatar->isBuilt() << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
}
}
}
void LLSkinningUtil::checkSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin)
{
#ifdef SHOW_ASSERT // same condition that controls llassert()
const S32 max_joints = skin->mJointNames.size();
for (U32 j=0; j<num_vertices; j++)
{
F32 *w = weights[j].getF32ptr();
F32 wsum = 0.0;
for (U32 k=0; k<4; ++k)
{
S32 i = llfloor(w[k]);
llassert(i>=0);
llassert(i<max_joints);
wsum += w[k]-i;
}
llassert(wsum > 0.0f);
}
#endif
}
void LLSkinningUtil::scrubSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin)
{
const S32 max_joints = skin->mJointNames.size();
for (U32 j=0; j<num_vertices; j++)
{
F32 *w = weights[j].getF32ptr();
for (U32 k=0; k<4; ++k)
{
S32 i = llfloor(w[k]);
F32 f = w[k]-i;
i = llclamp(i,0,max_joints-1);
w[k] = i + f;
}
}
checkSkinWeights(weights, num_vertices, skin);
}
void LLSkinningUtil::getPerVertexSkinMatrix(
F32* weights,
LLMatrix4a* mat,
bool handle_bad_scale,
LLMatrix4a& final_mat,
U32 max_joints)
{
bool valid_weights = true;
final_mat.clear();
S32 idx[4];
LLVector4 wght;
F32 scale = 0.f;
for (U32 k = 0; k < 4; k++)
{
F32 w = weights[k];
// BENTO potential optimizations
// - Do clamping in unpackVolumeFaces() (once instead of every time)
// - int vs floor: if we know w is
// >= 0.0, we can use int instead of floorf; the latter
// allegedly has a lot of overhead due to ieeefp error
// checking which we should not need.
idx[k] = llclamp((S32) floorf(w), (S32)0, (S32)max_joints-1);
wght[k] = w - floorf(w);
scale += wght[k];
}
if (handle_bad_scale && scale <= 0.f)
{
wght = LLVector4(1.0f, 0.0f, 0.0f, 0.0f);
valid_weights = false;
}
else
{
// This is enforced in unpackVolumeFaces()
llassert(scale>0.f);
wght *= 1.f/scale;
}
for (U32 k = 0; k < 4; k++)
{
F32 w = wght[k];
LLMatrix4a src;
src.setMul(mat[idx[k]], w);
final_mat.add(src);
}
// SL-366 - with weight validation/cleanup code, it should no longer be
// possible to hit the bad scale case.
llassert(valid_weights);
}
void LLSkinningUtil::initJointNums(LLMeshSkinInfo* skin, LLVOAvatar *avatar)
{
if (!skin->mJointNumsInitialized)
{
for (U32 j = 0; j < skin->mJointNames.size(); ++j)
{
LLJoint *joint = NULL;
if (skin->mJointNums[j] == -1)
{
joint = avatar->getJoint(skin->mJointNames[j]);
if (joint)
{
skin->mJointNums[j] = joint->getJointNum();
if (skin->mJointNums[j] < 0)
{
LL_WARNS_ONCE() << "joint has unusual number " << skin->mJointNames[j] << ": " << skin->mJointNums[j] << LL_ENDL;
LL_WARNS_ONCE() << "avatar build state: isBuilt() " << avatar->isBuilt() << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
}
}
else
{
LL_WARNS_ONCE() << "unable to find joint " << skin->mJointNames[j] << LL_ENDL;
LL_WARNS_ONCE() << "avatar build state: isBuilt() " << avatar->isBuilt() << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
}
}
}
skin->mJointNumsInitialized = true;
}
}
static LLTrace::BlockTimerStatHandle FTM_FACE_RIGGING_INFO("Face Rigging Info");
void LLSkinningUtil::updateRiggingInfo(const LLMeshSkinInfo* skin, LLVOAvatar *avatar, LLVolumeFace& vol_face)
{
LL_RECORD_BLOCK_TIME(FTM_FACE_RIGGING_INFO);
if (vol_face.mJointRiggingInfoTab.needsUpdate())
{
S32 num_verts = vol_face.mNumVertices;
if (num_verts>0 && vol_face.mWeights && (skin->mJointNames.size()>0))
{
initJointNums(const_cast<LLMeshSkinInfo*>(skin), avatar);
if (vol_face.mJointRiggingInfoTab.size()==0)
{
//std::set<S32> active_joints;
//S32 active_verts = 0;
vol_face.mJointRiggingInfoTab.resize(LL_CHARACTER_MAX_ANIMATED_JOINTS);
LLJointRiggingInfoTab &rig_info_tab = vol_face.mJointRiggingInfoTab;
for (S32 i=0; i<vol_face.mNumVertices; i++)
{
LLVector4a& pos = vol_face.mPositions[i];
F32 *weights = vol_face.mWeights[i].getF32ptr();
LLVector4 wght;
S32 idx[4];
F32 scale = 0.0f;
// AXON unpacking of weights should be pulled into a common function and optimized if possible.
for (U32 k = 0; k < 4; k++)
{
F32 w = weights[k];
idx[k] = llclamp((S32) floorf(w), (S32)0, (S32)LL_CHARACTER_MAX_ANIMATED_JOINTS-1);
wght[k] = w - idx[k];
scale += wght[k];
}
if (scale > 0.0f)
{
for (U32 k=0; k<4; ++k)
{
wght[k] /= scale;
}
}
for (U32 k=0; k<4; ++k)
{
S32 joint_index = idx[k];
if (wght[k] > 0.0f)
{
S32 joint_num = skin->mJointNums[joint_index];
if (joint_num >= 0 && joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS)
{
rig_info_tab[joint_num].setIsRiggedTo(true);
// AXON can precompute these matMuls.
LLMatrix4a bind_shape;
bind_shape.loadu(skin->mBindShapeMatrix);
LLMatrix4a inv_bind;
inv_bind.loadu(skin->mInvBindMatrix[joint_index]);
LLMatrix4a mat;
matMul(bind_shape, inv_bind, mat);
LLVector4a pos_joint_space;
mat.affineTransform(pos, pos_joint_space);
pos_joint_space.mul(wght[k]);
LLVector4a *extents = rig_info_tab[joint_num].getRiggedExtents();
update_min_max(extents[0], extents[1], pos_joint_space);
}
}
}
}
//LL_DEBUGS("RigSpammish") << "built rigging info for vf " << &vol_face
// << " num_verts " << vol_face.mNumVertices
// << " active joints " << active_joints.size()
// << " active verts " << active_verts
// << LL_ENDL;
vol_face.mJointRiggingInfoTab.setNeedsUpdate(false);
}
}
if (vol_face.mJointRiggingInfoTab.size()!=0)
{
LL_DEBUGS("RigSpammish") << "we have rigging info for vf " << &vol_face
<< " num_verts " << vol_face.mNumVertices << LL_ENDL;
}
else
{
LL_DEBUGS("RigSpammish") << "no rigging info for vf " << &vol_face
<< " num_verts " << vol_face.mNumVertices << LL_ENDL;
}
}
}
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