void init_patch() const {
if (bilinear_patch_) { return; }
bilinear_patch_.reset(
BilinearPatch<VertexType>(
bottom_(static_cast<ScalarType>(0.0)), bottom_(static_cast<ScalarType>(1.0)),
top_(static_cast<ScalarType>(0.0)), top_(static_cast<ScalarType>(1.0))
)
);
}
VertexType operator () (ScalarType u, ScalarType v) const {
VertexType a = interpolate(u, left_(v), right_(v)),
b = interpolate(v, bottom_(u), top_(u)),
c = get_patch_value(u, v);
return interpolate(.5,
interpolate(-1, a, c),
interpolate(-1, b, c)
);
}
void Element::
long_pre (Type const&)
{
push_ (::XSCRT::XML::Element< wchar_t > (L"long", top_ ()));
}
void Element::
el_pre (Type const&)
{
push_ (::XSCRT::XML::Element< wchar_t > (L"el", top_ ()));
}
void Element::
value_pre (Type const&)
{
push_ (::XSCRT::XML::Element< wchar_t > (L"value", top_ ()));
}
