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Fix for importing animated skinned meshes.

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Scale is negated in inverse bind matrices.
Vertex weights are normalized (glTF importer is limited to 4 weights per vert).
Fixed interpolation for animations where the first frame is not at 0.0.
Allows cached.dts version of assimp imported shapes to be loaded.
This commit is contained in:
OTHGMars 2019-04-25 16:02:22 -04:00
parent 6be2989bbc
commit 6660f253b5
4 changed files with 35 additions and 14 deletions
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27
Engine/source/ts/assimp/assimpAppMesh.cpp
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@ -202,6 +202,15 @@ void AssimpAppMesh::lockMesh(F32 t, const MatrixF& objOffset)
MatrixF boneTransform;
AssimpAppNode::assimpToTorqueMat(mMeshData->mBones[b]->mOffsetMatrix, boneTransform);
Point3F boneScale = boneTransform.getScale();
if (boneScale != Point3F::One)
{
Point3F scaleMult = Point3F::One / boneScale;
Point3F scalePos = boneTransform.getPosition();
boneTransform.scale(scaleMult);
scalePos /= scaleMult;
boneTransform.setPosition(scalePos);
}
initialTransforms.push_back(boneTransform);
//Weights
@ -225,20 +234,32 @@ void AssimpAppMesh::lockMesh(F32 t, const MatrixF& objOffset)
vertexIndex.setSize(nonZeroWeights);
boneIndex.setSize(nonZeroWeights);
// Copy the weights to our vectors in vertex order
// Copy the weights to our vectors in vertex order and
// normalize vertex weights (force weights for each vert to sum to 1)
U32 nextWeight = 0;
for (U32 i = 0; i < mMeshData->mNumVertices; i++)
for (U32 i = 0; i < mMeshData->mNumVertices; ++i)
{
for (U32 ind = 0; ind < nonZeroWeights; ind++)
U32 vertStart = nextWeight;
F32 invTotalWeight = 0;
for (U32 ind = 0; ind < nonZeroWeights; ++ind)
{
if (tmpVertexIndex[ind] == i)
{
weight[nextWeight] = tmpWeight[ind];
invTotalWeight += tmpWeight[ind];
vertexIndex[nextWeight] = tmpVertexIndex[ind];
boneIndex[nextWeight] = tmpBoneIndex[ind];
nextWeight++;
}
}
// Now normalize the vertex weights
if (invTotalWeight > 0.0)
{
invTotalWeight = 1.0f / invTotalWeight;
for (U32 ind = vertStart; ind < nextWeight; ++ind)
weight[ind] *= invTotalWeight;
}
}
if ( noUVFound )