I'm trying to import an fbx file into my managed DirectX application. The problem I'm having is importing a skinned mesh.
The transformation of my mesh during animation is incorrect. The mesh appears to rotate around the wrong axis. The mesh in question is a simple mesh containing 3 cubes. Each of these cubes should rotate around the 'Up' axis. Instead they are rotating around the 'Look' axis. Here is screenshot:
I am converting the fbx transform data like so:
// skin info
SkinInfo si = new SkinInfo(ncVertices, vertexElements.ToArray(), ncBones);
// inst. bone offsets array
Matrix[] boneOffsets = new Matrix[ncBones];
// inst. bone matrices lookup array
GDEFrame[] boneMatricesLookup = new GDEFrame[ncBones];
foreach(FBXDeformer child in model.Deformer.Children)
{
// set bone name
si.SetBoneName(nc, child.Frame.Name);
// compute inverse bind pose transform( inverse transform link * bone transform * geometry transform )
Matrix m = Matrix.Transpose(Matrix.Invert(child.TransformLink) * child.Transform) * model.Frame.TransformationMatrix;
// set offset matrix( used to transform vertices
si.SetBoneOffsetMatrix(nc, boneOffsets[nc] = m);
// set bone influences
si.SetBoneInfluence(nc, child.Indices.ToArray(), child.Weights.ToArray());
// set bone matrices lookup frame
boneMatricesLookup[nc] = child.Frame;
// inc. counter
nc++;
}
// set skin info
smc.SetSkinInfo(si)
.SetMaxVertexInfluences(si.MaximumVertexInfluences)
.SetBoneOffsets(boneOffsets)
.SetMatrixPalette(boneMatricesLookup);How do I correctly convert the fbx transforms?