I've been looking at this code so long I can't even see it anymore. Something's wrong, and I'll be jiggered if I know where it is. Any thoughts? It's some pretty basic code for creating the matrices for skeletal animation (exported from Milkshape).
The inverse base matrices are created...
void Bone::BuildInvBaseMat()
{
if ( m_bDone == *m_bDoneVal )
return;
D3DXMatrixRotationQuaternion( &m_RelativeMat, &m_BaseRot );
m_RelativeMat._41 = m_BasePos.x; m_RelativeMat._42 = m_BasePos.y; m_RelativeMat._43 = m_BasePos.z;
if ( m_pParent )
{
m_pParent->BuildInvBaseMat();
D3DXMatrixMultiply( &m_FinalMat, &m_pParent->m_FinalMat, &m_RelativeMat );
}
else
memcpy( &m_FinalMat, &m_RelativeMat, sizeof( D3DXMATRIX ) );
memcpy( &m_InvBaseMat, &m_FinalMat, sizeof( D3DXMATRIX ) );
D3DXMatrixInverse( &m_InvBaseMat, NULL, &m_InvBaseMat );
m_bDone = *m_bDoneVal;
}
The other bone matrices are created (without keyframe info (yet)...
void Bone::AnimateBone( int iFrame, int iAnimID )
{
// Has this bone already been calculated?
if ( m_bDone == *m_bDoneVal )
return;
/* D3DXVECTOR3 Pos;
D3DXQUATERNION Rot;
D3DXMATRIX KeyMat, Mat;
m_Anims.GetAt( iAnimID )->LerpPos( iFrame, &Pos );
m_Anims.GetAt( iAnimID )->SlerpRot( iFrame, &Rot );
D3DXMatrixRotationQuaternion( &KeyMat, &Rot );
KeyMat._41 = Pos.x; KeyMat._42 = Pos.y; KeyMat._43 = Pos.z;*/
if ( m_pParent )
{
m_pParent->AnimateBone( iFrame, iAnimID );
D3DXMatrixMultiply( &m_WorldMat, &m_pParent->m_WorldMat, &m_RelativeMat );
}
else
memcpy( &m_WorldMat, &m_RelativeMat, sizeof( D3DXMATRIX ) );
D3DXMatrixMultiply( &m_FinalMat, &m_InvBaseMat, &m_WorldMat );
m_bDone = *m_bDoneVal;
}
And the skeleton is drawn using this method to grab the bone positions...
void Bone::GetPos_World( D3DXVECTOR3 *pVec )
{
pVec->x = 0.0f;
pVec->y = 0.0f;
pVec->z = 0.0f;
D3DXVec3TransformCoord( pVec, pVec, &m_WorldMat );
}
HELP! The first person to save my weary butt gets to go straight to heaven.
[edited by - Jo on April 21, 2004 6:10:12 PM]
-----------------------------Mice are an excellent source of mice.
