void NxMeshManager::SetPivotTransform( Ogre::MeshPtr mesh, const Nx::Vector3 & Position, const Nx::Quaternion & Rotation, const Nx::Vector3 & Scale )
{
//from mesh magick / mit licence
Nx::Matrix4 transform = Nx::Matrix4::IDENTITY;
Nx::Vector3 translate = Nx::Vector3::ZERO;
// Apply current transform to the mesh, to get the bounding box to
// base te translation on.
AxisAlignedBox aabb = getMeshAabb( mesh, transform);
//if (alignment == "left")
//{
// translate = Vector3(-aabb.getMinimum().x, 0, 0);
//}
//else if (alignment == "center")
//{
// translate = Vector3(-aabb.getCenter().x, 0, 0);
//}
//else if (alignment == "right")
//{
// translate = Vector3(-aabb.getMaximum().x, 0, 0);
//}
//Position .. only support pivot down / centered
//translate = Vector3(0, -aabb.getMinimum().y, 0);// pivot down
translate = Position;
transform = Nx::Matrix4::getTrans(translate) * transform;
//rotation
transform = Nx::Matrix4(Rotation) * transform;
//scale
transform = Nx::Matrix4::getScale(Scale) * transform;
// Check whether we have to flip vertex winding.
// We do have to, if we changed our right hand base.
// We can test it by using the cross product from X and Y and see, if it is a non-negative
// projection on Z. Actually it should be exactly Z, as we don't do non-uniform scaling yet,
// but the test is cheap either way.
Nx::Matrix3 m3;
transform.extract3x3Matrix(m3);
if (m3.GetColumn(0).crossProduct(m3.GetColumn(1)).dotProduct(m3.GetColumn(2)) < 0)
{
LogMsg("SetPivotPosition : Flipping vertex winding ... " );
mFlipVertexWinding = true;
}
//mTransform = transform;
NxMat4toOgre( mTransform, transform ) ;
mBoundingBox.setNull();
if( mesh->sharedVertexData != NULL)
{
processVertexData( mesh->sharedVertexData);
}else
{
LogMsg("mesh->sharedVertexData NULL");
}
for( int i = 0; i < mesh->getNumSubMeshes(); i++ )
{
SubMesh* submesh = mesh->getSubMesh(i);
if( submesh->vertexData != NULL )
{
LogMsg("SetPivotPosition : Processing vertex data ... " );
processVertexData(submesh->vertexData);
}else
{
LogMsg("submesh->vertexData NULL");
}
if (submesh->indexData != NULL)
{
LogMsg("SetPivotPosition : Processing Index data .." );
processIndexData(submesh->indexData);
}else
{
LogMsg("submesh->indexData NULL");
}
}
//process pose
for( unsigned short i = 0; i < mesh->getPoseCount(); ++i )
{
Ogre::Pose * pose = mesh->getPose(i);
Ogre::Matrix3 m3x3;
mTransform.extract3x3Matrix(m3x3);
Pose::VertexOffsetIterator it = pose->getVertexOffsetIterator();
while (it.hasMoreElements()) {
Ogre::Vector3 offset = it.peekNextValue();
Ogre::Vector3 newOffset = m3x3 * offset;
*it.peekNextValuePtr() = newOffset;
it.moveNext();
}
}
mesh->_setBounds( mBoundingBox, false );
}
