void CSoundSystem::setListenerMatrix(const NLMISC::CMatrix &m)
{
if (_AudioMixer)
{
static CMatrix oldMatrix;
if(m.getPos() != oldMatrix.getPos() || m.getJ() != oldMatrix.getJ() || m.getK() != oldMatrix.getK())
{
UListener *l = _AudioMixer->getListener();
l->setPos(m.getPos());
l->setOrientation(m.getJ(), m.getK());
oldMatrix = m;
}
}
}
// ***************************************************************************
void CMaterial::decompUserTexMat(uint stage, float &uTrans, float &vTrans, float &wRot, float &uScale, float &vScale)
{
nlassert(stage < IDRV_MAT_MAXTEXTURES);
nlassert(isUserTexMatEnabled(stage)); // must activate animated texture matrix for this stage
CMatrix convMat; // exported v are already inverted (todo: optim this...)
convMat.setRot(CVector::I, -CVector::J, CVector::K);
convMat.setPos(CVector::J);
const NLMISC::CMatrix texMat = convMat * _TexUserMat->TexMat[stage] * convMat;
/// find the rotation around w
NLMISC::CVector i = texMat.getI();
NLMISC::CVector j = texMat.getJ();
uScale = sqrtf(i.x * i.x + j.x * j.x);
vScale = sqrtf(i.y * i.y + j.y * j.y);
//
i.normalize();
//
float angle = acosf(i.x / i.norm());
if (i.y < 0)
{
angle = 2.f * (float) NLMISC::Pi - angle;
}
wRot = angle;
// compute position
CMatrix InvSR;
InvSR.setRot(texMat.getI(), texMat.getJ(), texMat.getK());
InvSR.invert();
CVector half(0.5f, 0.5f, 0.f);
CVector offset = half + InvSR * (texMat.getPos() -half);
uTrans = - offset.x;
vTrans = - offset.y;
}