Matrix3 plMaxNodeBase::GetWorldToParent(TimeValue t)
{
// This may look back-ass-ward, but that's only because it
// is. If we've got inheritance filtering on, then our localtoworld
// is no longer parentl2w * l2p, because we'll be ignoring
// some of our parent's transform. More precisely, we'll be
// clobbering parts of the product of our parent's current transform
// and our current local to parent. So we're going to calculate
// a parent to world transform here that would get us to the
// right point and orientation in space, even though it has
// little or nothing to do with our parent's real transform.
// Note that we only go through this charade if we've got
// filtering of inheritance active for this node.
plMaxNodeBase* parent = (plMaxNodeBase*)GetParentNode();
if( !GetFilterInherit() )
return parent->GetWorldToLocal(t);
// l2w = l2p * parentL2W
// l2w * parentW2L = l2p
// parentW2L = w2l * l2p
Point3 pos;
float rot[4];
ScaleValue scl;
Interval posInv;
Interval rotInv;
Interval sclInv;
Matrix3Indirect parentMatrix(parent->GetNodeTM(t));
TMComponentsArg cmpts(&pos, &posInv, rot, &rotInv, &scl, &sclInv);
GetTMController()->GetLocalTMComponents(t, cmpts, parentMatrix);
Quat q;
if( cmpts.rotRep == TMComponentsArg::RotationRep::kQuat )
q = Quat(rot);
else
EulerToQuat(rot, q, cmpts.rotRep);
Matrix3 l2p(true);
l2p.PreTranslate(pos);
PreRotateMatrix(l2p, q);
l2p.PreScale(scl.s);
PreRotateMatrix(l2p, scl.q);
Matrix3 w2l = GetWorldToLocal(t);
return w2l * l2p;
}
void plAnimPath::MakeDrawList(hsTArray<uint16_t>& idx, hsTArray<hsPoint3>& pos)
{
hsMatrix44 resetL2W = GetLocalToWorld();
hsMatrix44 resetW2L = GetWorldToLocal();
hsMatrix44 ident;
ident.Reset();
SetTransform(ident, ident);
float numSegs = fRadius; // crude estimate of arclength
if (numSegs>100)
numSegs=100;
float animLen = GetLength();
float timeInc = animLen/numSegs;
float time=0;
hsPoint3 p1, p2;
SetCurTime(0, kCalcPosOnly);
GetPosition(&p1);
time += timeInc;
bool quit=false;
while(! quit && time < animLen+timeInc)
{
if (time > animLen)
{
time = animLen;
quit=true;
}
SetCurTime(time, kCalcPosOnly);
GetPosition(&p2);
IMakeSegment(idx, pos, p1, p2);
time += timeInc;
p1 = p2;
}
SetTransform(resetL2W, resetW2L);
}
hsMatrix44 plMaxNodeBase::GetWorldToLocal44(TimeValue t)
{
Matrix3 m3 = GetWorldToLocal(t);
hsMatrix44 m44 = Matrix3ToMatrix44(m3);
return m44;
}
