I am working on an MD3 loader in DirectX. Right now it loads all the data and animates it. The problem is the orientation of the different parts. I can get the lower, upper , and head parts attached by adding their positions (located in the tags) The problem comes when I try to apply the rotations stored in the tags. If Im correct, when I find a link to draw I have to pass it the corresponding tag so i can apply the rotations within? I have

tempv.position = RotatePbM(v.position, tag);
 // (tag was passed by previous node)

tempv.position += pos;
 // this just translates

tempv.position = RotateP(v.position, 0.0f, -(PI/2.0f), 0.0f);
 // this rotates it to be up and down cuz of how MD3s are stored



D3DXVECTOR3 RotateP(D3DXVECTOR3 v, float r, float p, float y)
{
	D3DXMATRIX R, Rx, Ry, Rz;
	D3DXVECTOR3 NewV;

	D3DXMatrixRotationZ(&Rz, r);
	D3DXMatrixRotationX(&Rx, p);
	D3DXMatrixRotationY(&Ry, y);

	R = Rz * Rx * Ry;

	NewV.x = (v.x*R._11)+(v.y*R._21)+(v.z*R._31);
	NewV.y = (v.x*R._12)+(v.y*R._22)+(v.z*R._32);
	NewV.z = (v.x*R._13)+(v.y*R._23)+(v.z*R._33);

	return NewV;
}

D3DXVECTOR3 RotatePbM(D3DXVECTOR3 v, MD3Tag *tag)
{
	D3DXVECTOR3 NewV;

	NewV.x = (v.x*tag->rotation[0][0])+(v.y*tag->rotation[0][1])+(v.z*tag->rotation[0][2]);
	NewV.y = (v.x*tag->rotation[1][0])+(v.y*tag->rotation[1][1])+(v.z*tag->rotation[1][2]);
	NewV.z = (v.x*tag->rotation[2][0])+(v.y*tag->rotation[2][1])+(v.z*tag->rotation[2][2]);

	return NewV;
}

Are those functions right, and is the order of operations performed on the vector correct?

Ok, so now what i''m wondering is what''s the best way to handle doing all these rotations? Do I want to save the world matrix, then change it for each piece that I have to rotate to draw? Or do I want to pre-rotate the vertices mathematically and store them how I want them?

Anyone at all farmiliar with MD3s?