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Diffstat (limited to 'indra/newview/llskinningutil.cpp')
| -rw-r--r-- | indra/newview/llskinningutil.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/indra/newview/llskinningutil.cpp b/indra/newview/llskinningutil.cpp new file mode 100644 index 0000000000..b2fd1744bc --- /dev/null +++ b/indra/newview/llskinningutil.cpp @@ -0,0 +1,199 @@ +/** +* @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" + +// static +void LLSkinningUtil::initClass() +{ +} + +// static +U32 LLSkinningUtil::getMaxJointCount() +{ + U32 result = LL_MAX_JOINTS_PER_MESH_OBJECT; + return result; +} + +// static +U32 LLSkinningUtil::getMeshJointCount(const LLMeshSkinInfo *skin) +{ + return llmin((U32)getMaxJointCount(), (U32)skin->mJointNames.size()); +} + +// static +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])) + { + skin->mJointNames[j] = "mPelvis"; + } + } + skin->mInvalidJointsScrubbed = true; +} + +// static +void LLSkinningUtil::initSkinningMatrixPalette( + LLMatrix4* mat, + S32 count, + const LLMeshSkinInfo* skin, + LLVOAvatar *avatar) +{ + for (U32 j = 0; j < count; ++j) + { + LLJoint *joint = NULL; + if (skin->mJointNums[j] == -1) + { + joint = avatar->getJoint(skin->mJointNames[j]); + if (joint) + { + skin->mJointNums[j] = joint->getJointNum(); + } + } + else + { + 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; + } + } +} + +// static +void LLSkinningUtil::checkSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin) +{ +#ifndef LL_RELEASE_FOR_DOWNLOAD + 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 +} + +// static +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); +} + |