static void execN(TF&& mFn, const std::tuple<Ts...>& mXs)
{
// `TNBase` is the base index of the tuple elements
// we're going to get.
// `Cs...` gets expanded from 0 to the number of arguments
// per function call (`N`).
mFn
(
std::get<TNBase + TNArity>(mXs)...
);
// Example expansion of `execN` for the previous
// binary function example called with 4 arguments:
/*
auto fn([](auto x, auto y){ return x + y; });
forNArgs<2>
(
fn,
0,
10,
20,
30
);
(execN<0 * 2>(fn, TUPLE{0, 10, 20, 30}), true)
// ...expands to...
fn
(
std::get<0 + 0>(TUPLE{0, 10, 20, 30}),
std::get<0 + 1>(TUPLE{0, 10, 20, 30})
);
// ...expands to...
fn
(
0,
10
);
(execN<1 * 2>(fn, TUPLE{0, 10, 20, 30}), true)
// ...expands to...
fn
(
std::get<2 + 0>(TUPLE{0, 10, 20, 30}),
std::get<2 + 1>(TUPLE{0, 10, 20, 30})
);
// ...expands to...
fn
(
20,
30
);
*/
}
void forArgs(TF&& mFn, Ts&&... mArgs)
{
return (void) std::initializer_list<int>
{
(
mFn(std::forward<Ts>(mArgs)),
0
)...
};
}
void chain(TF&& mFn, TArgs&&... mArgs)
{
forArgs(
[mFn](auto& mCont)
{
for(auto& x : mCont) mFn(x);
},
std::forward<TArgs>(mArgs)...);
}
bool util::isIntermediate(const MObject & object)
{
MStatus stat;
MFnDagNode mFn(object);
MPlug plug = mFn.findPlug("intermediateObject", false, &stat);
if (stat == MS::kSuccess && plug.asBool())
return true;
else
return false;
}
MStatus getPlugByName(const MString & objName, const MString & attrName,
MPlug & plug)
{
MObject object = MObject::kNullObj;
MStatus status = getObjectByName(objName, object);
if (status == MS::kSuccess)
{
MFnDependencyNode mFn(object, &status);
if (status == MS::kSuccess)
plug = mFn.findPlug(attrName, &status);
}
return status;
}
bool util::isRenderable(const MObject & object)
{
MStatus stat;
MFnDagNode mFn(object);
// templated turned on? return false
MPlug plug = mFn.findPlug("template", false, &stat);
if (stat == MS::kSuccess && plug.asBool())
return false;
// visibility or lodVisibility off? return false
plug = mFn.findPlug("visibility", false, &stat);
if (stat == MS::kSuccess && !plug.asBool())
{
// the value is off. let's check if it has any in-connection,
// otherwise, it means it is not animated.
MPlugArray arrayIn;
plug.connectedTo(arrayIn, true, false, &stat);
if (stat == MS::kSuccess && arrayIn.length() == 0)
{
return false;
}
}
plug = mFn.findPlug("lodVisibility", false, &stat);
if (stat == MS::kSuccess && !plug.asBool())
{
MPlugArray arrayIn;
plug.connectedTo(arrayIn, true, false, &stat);
if (stat == MS::kSuccess && arrayIn.length() == 0)
{
return false;
}
}
// this shape is renderable
return true;
}
inline void forTypes(TF&& mFn) noexcept
{
if(mFn(TypeWrapper<T>{}) == ForAction::Continue)
forTypes<Ts...>(mFn);
}
void Command::execute(const Entity& e, float dt) const
{
mFn(e, dt);
}