// ***************************************************************************
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;
}
void CDirectionEdit::selectNewVect(const CPoint &point)
{
const float epsilon = 10E-3f;
NLMISC::CVector v = _Wrapper->get();
if (point.x > CornerDist && point.y > CornerDist && point.x < (CornerDist + BasisSize) && point.y < (CornerDist + BasisSize))
{
ScreenToVect(v.x, v.z, point.x, point.y, CornerDist, CornerDist, BasisSize);
float d = v.x * v.x + v.z * v.z;
float f;
if (fabsf(d > epsilon))
{
f = sqrtf((1.f - v.y * v.y) / d);
}
else
{
f = 1;
}
v.x *= f;
v.z *= f;
}
if (point.x > CornerDist && point.y > (BasisGap + BasisSize + CornerDist) && point.x < (CornerDist + BasisSize) && point.y < (CornerDist + BasisGap + 2 * BasisSize))
{
ScreenToVect(v.y, v.z, point.x, point.y, CornerDist, CornerDist + BasisGap + BasisSize, BasisSize);
float d = v.y * v.y + v.z * v.z;
float f;
if (fabsf(d > epsilon))
{
f = sqrtf((1.f - v.x * v.x) / d);
}
else
{
f = 1;
}
v.y *= f;
v.z *= f;
}
v.normalize();
_Wrapper->setAndUpdateModifiedFlag(v);
Invalidate();
}
void CDirectionWidget::setNewVecYZ(float x, float y)
{
const float epsilon = 10E-3f;
NLMISC::CVector v = _value;
v.y = x;
v.z = y;
float d = v.y * v.y + v.z * v.z;
float f;
if (fabs(d) > epsilon)
f = sqrt((1.f - v.x * v.x) / d);
else
f = 1;
v.y *= f;
v.z *= f;
v.normalize();
setValue(v);
}
void CDirectionWidget::setNewVecYZ(float x, float y)
{
const float epsilon = 10E-3f;
NLMISC::CVector v = _Wrapper->get();
v.y = x;
v.z = y;
float d = v.y * v.y + v.z * v.z;
float f;
if (fabs(d) > epsilon)
f = sqrt((1.f - v.x * v.x) / d);
else
f = 1;
v.y *= f;
v.z *= f;
v.normalize();
_Wrapper->setAndUpdateModifiedFlag(v);
_ui.xzWidget->setVector(_Wrapper->get().x, _Wrapper->get().z);
_ui.yzWidget->setVector(_Wrapper->get().y, _Wrapper->get().z);
}