TSdlQuaternion.h

Go to the documentation of this file.

#pragma once
 
#include "SDL/Introspect/TSdlValue.h"
#include "SDL/Introspect/TSdlOptionalValue.h"
#include "Math/TQuaternion.h"
#include "SDL/sdl_helpers.h"
 
#include <Common/assertion.h>
#include <Common/primitive_type.h>
 
#include <type_traits>
#include <string>
 
namespace ph
{
 
template<typename Owner, typename Element = real, typename SdlValueType = TSdlValue<math::TQuaternion<Element>, Owner>>
class TSdlQuaternion : public SdlValueType
{
    static_assert(std::is_base_of_v<TSdlAbstractValue<math::TQuaternion<Element>, Owner>, SdlValueType>,
        "SdlValueType should be a subclass of TSdlAbstractValue.");
 
    static_assert(std::is_same_v<Element, real>,
        "Currently supports only ph::real");
 
public:
    template<typename ValueType>
    TSdlQuaternion(std::string valueName, ValueType Owner::* const valuePtr) :
        SdlValueType("quaternion", std::move(valueName), valuePtr)
    {
        if constexpr(std::is_same_v<SdlValueType, TSdlValue<math::TQuaternion<Element>, Owner>>)
        {
            this->defaultTo(math::TQuaternion<Element>::makeNoRotation());
        }
    }
    
    std::string valueAsString(const math::TQuaternion<Element>& quat) const override
    {
        return quat.toString();
    }
 
    SdlNativeData ownedNativeData(Owner& owner) const override
    {
        math::TQuaternion<Element>* const quat = this->getValue(owner);
        if constexpr(std::is_base_of_v<TSdlOptionalValue<math::TQuaternion<Element>, Owner>, SdlValueType>)
        {
            auto data = SdlNativeData(
                [&optQuat = this->valueRef(owner)](std::size_t elementIdx) -> SdlGetterVariant
                {
                    return optQuat
                        ? SdlNativeData::permissiveElementGetter(&((*optQuat)[elementIdx]))
                        : std::monostate{};
                },
                [&optQuat = this->valueRef(owner)](std::size_t elementIdx, SdlSetterVariant input) -> bool
                {
                    if(input.isEmpty())
                    {
                        optQuat = std::nullopt;
                        return true;
                    }
                    else
                    {
                        if(!optQuat)
                        {
                            optQuat = math::TQuaternion<Element>{};
                        }
 
                        return SdlNativeData::permissiveElementSetter(input, &((*optQuat)[elementIdx]));
                    }
                },
                AnyNonConstPtr(quat));
 
            data.elementContainer = ESdlDataFormat::Quaternion;
            data.elementType = sdl::number_type_of<Element>();
            data.numElements = quat ? 4 : 0;
            data.tupleSize = 4;
            data.isNullClearable = true;
            return data;
        }
        else
        {
            SdlNativeData data;
            if(quat)
            {
                data = SdlNativeData(
                    [quat](std::size_t elementIdx) -> SdlGetterVariant
                    {
                        return SdlNativeData::permissiveElementGetter(&((*quat)[elementIdx]));
                    },
                    [quat](std::size_t elementIdx, SdlSetterVariant input) -> bool
                    {
                        return SdlNativeData::permissiveElementSetter(input, &((*quat)[elementIdx]));
                    },
                    AnyNonConstPtr(quat));
            }
            data.elementContainer = ESdlDataFormat::Quaternion;
            data.elementType = sdl::number_type_of<Element>();
            data.numElements = quat ? 4 : 0;
            data.tupleSize = 4;
            return data;
        }
    }
 
protected:
    void loadFromSdl(
        Owner&                 owner,
        const SdlInputClause&  clause,
        const SdlInputContext& ctx) const override
    {
        this->setValue(owner, sdl::load_quaternion<Element>(clause.value));
    }
 
    void saveToSdl(
        const Owner&            owner,
        SdlOutputClause&        out_clause,
        const SdlOutputContext& ctx) const override
    {
        if(const math::TQuaternion<Element>* quat = this->getConstValue(owner); quat)
        {
            sdl::save_quaternion(*quat, out_clause.value);
        }
        else
        {
            out_clause.isEmpty = true;
        }
    }
};
 
template<typename Owner, typename Element = real>
using TSdlOptionalQuaternion = TSdlQuaternion<Owner, Element, TSdlOptionalValue<math::TQuaternion<Element>, Owner>>;
 
}// end namespace ph