fbxsdk/fileio/collada/fbxcolladaelement.h

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/****************************************************************************************
 
   Copyright (C) 2013 Autodesk, Inc.
   All rights reserved.
 
   Use of this software is subject to the terms of the Autodesk license agreement
   provided at the time of installation or download, or which otherwise accompanies
   this software in either electronic or hard copy form.
 
****************************************************************************************/

#ifndef _FBXSDK_FILEIO_COLLADA_ELEMENT_H_
#define _FBXSDK_FILEIO_COLLADA_ELEMENT_H_

#include <fbxsdk.h>

#include <fbxsdk/fbxsdk_nsbegin.h>

// Utility functions to convert type to array tag used in COLLADA source element
template <typename T>
inline const FbxString TypeToArrayTag()
{
    return COLLADA_FLOAT_ARRAY_STRUCTURE;
}

template <>
inline const FbxString TypeToArrayTag<bool>()
{
    return COLLADA_BOOL_ARRAY_STRUCTURE;
}

template <>
inline const FbxString TypeToArrayTag<int>()
{
    return COLLADA_INT_ARRAY_STRUCTURE;
}

template <>
inline const FbxString TypeToArrayTag<FbxString>()
{
    return COLLADA_NAME_ARRAY_STRUCTURE;
}

// Utility functions to convert type to parameter tag used in COLLADA source element
template <typename T>
inline const FbxString TypeToParameterTag()
{
    return COLLADA_FLOAT_TYPE;
}

template <>
inline const FbxString TypeToParameterTag<bool>()
{
    return COLLADA_BOOL_TYPE;
}

template <>
inline const FbxString TypeToParameterTag<int>()
{
    return COLLADA_INT_TYPE;
}

template <>
inline const FbxString TypeToParameterTag<FbxString>()
{
    return COLLADA_NAME_TYPE;
}

//----------------------------------------------------------------------------//

struct ElementContentAccessor
{
    ElementContentAccessor();
    ElementContentAccessor(xmlNode * pElement);
    virtual ~ElementContentAccessor();

    template <typename TYPE>
    bool GetNext(TYPE * pData)
    {
        return FromString(pData, mPointer, &mPointer);
    }

    template <typename TYPE>
    int GetArray(TYPE * pArray,
        int pSourceUnitOffset = 0, int pSourceUnitValidCount = 1, int pSourceUnitSize = 1,
        int pDestUnitOffset = 0, int pDestUnitValidCount = 1, int pDestUnitSize = 1,
        TYPE pDefaultValue = TYPE())
    {
        if (pArray)
        {
            return FromStringToArray(mPointer, pArray,
                pSourceUnitOffset, pSourceUnitValidCount, pSourceUnitSize,
                pDestUnitOffset, pDestUnitValidCount, pDestUnitSize, pDefaultValue);
        }
        return 0;
    }

    xmlChar * mContent;
    const char * mPointer;
};

//----------------------------------------------------------------------------//

template <typename TYPE>
struct SourceElementContentAccessor : public ElementContentAccessor
{
    SourceElementContentAccessor(xmlNode * pSourceElement)
        : mCount(0), mStride(1), mOffset(0)
    {
        bool lReadCount = true;
        xmlNode* lTechniqueElement = DAE_FindChildElementByTag(pSourceElement, COLLADA_TECHNIQUE_COMMON_ELEMENT);
        if (lTechniqueElement)
        {
            xmlNode* lAccessorElement = DAE_FindChildElementByTag(lTechniqueElement, COLLADA_ACCESSOR_STRUCTURE);
            FBX_ASSERT(lAccessorElement);
            if (!lAccessorElement)
                return;

            DAE_GetElementAttributeValue(lAccessorElement, COLLADA_COUNT_PROPERTY, mCount);
            DAE_GetElementAttributeValue(lAccessorElement, COLLADA_STRIDE_PROPERTY, mStride);
            DAE_GetElementAttributeValue(lAccessorElement, COLLADA_OFFSET_PROPERTY, mOffset);
            lReadCount = false;
        }

        xmlNode * lDataArrayElement = DAE_FindChildElementByTag(pSourceElement,
            TypeToArrayTag<TYPE>());
        // Some COLLADA exporters use IDREF_array instead of Name_array
        if (!lDataArrayElement && TypeToArrayTag<TYPE>() == COLLADA_NAME_ARRAY_STRUCTURE)
            lDataArrayElement = DAE_FindChildElementByTag(pSourceElement, COLLADA_IDREF_ARRAY_STRUCTURE);
        FBX_ASSERT(lDataArrayElement);

        if (lDataArrayElement && lReadCount)
            DAE_GetElementAttributeValue(lDataArrayElement, COLLADA_COUNT_PROPERTY, mCount);

        mContent = xmlNodeGetContent(lDataArrayElement);
        mPointer = (const char *)mContent;
    }

    int mCount;
    int mStride;
    int mOffset;
};

//----------------------------------------------------------------------------//

class ElementBase
{
public:
    enum
    {
        MATRIX_STRIDE = 16,
    };

    // The name of user property in FBX which is used to preserve the ID of COLLADA element
    static const char* smID_PROPERTY_NAME;    

    ElementBase();
    virtual ~ElementBase();

    void SetXMLElement(xmlNode * pElement) { mXMLElement = pElement; }
    xmlNode * GetXMLElement() const { return mXMLElement; }

    const FbxString & GetID() const;

    const FbxSystemUnit * GetUnit() const;

private:
    xmlNode * mXMLElement;
    mutable FbxString * mID;
    mutable FbxSystemUnit * mUnit;
};

inline const FbxString URL(const FbxString & pID)
{
    return FbxString("#") + pID;
}

template <typename T>
xmlNode * AddSourceElement(xmlNode * pParentElement, const char * pID,
                           const T * pData, int pCount, int pStride = 1)
{
    FBX_ASSERT(pParentElement && pData);
    if (!pParentElement || !pData)
        return NULL;

    xmlNode * lSourceElement = DAE_AddChildElement(pParentElement, COLLADA_SOURCE_STRUCTURE);
    DAE_AddAttribute(lSourceElement, COLLADA_ID_PROPERTY, pID);

    FbxString lContent;
    const int lDataCount = pCount * pStride;
    for (int lIndex = 0; lIndex < lDataCount; ++lIndex)
    {
        lContent += ToString(pData[lIndex]);
        if (lIndex != lDataCount - 1)
            lContent += " ";
    }
    const FbxString lArrayID = FbxString(pID) + "-array";
    xmlNode * lArrayElement = DAE_AddChildElement(lSourceElement, TypeToArrayTag<T>(), lContent);
    DAE_AddAttribute(lArrayElement, COLLADA_ID_PROPERTY, lArrayID);
    DAE_AddAttribute(lArrayElement, COLLADA_COUNT_PROPERTY, lDataCount);

    xmlNode * lTechniqueCommonElement = DAE_AddChildElement(lSourceElement,
        COLLADA_TECHNIQUE_COMMON_ELEMENT);
    xmlNode * lAccessElement = DAE_AddChildElement(lTechniqueCommonElement, 
        COLLADA_ACCESSOR_STRUCTURE);
    DAE_AddAttribute(lAccessElement, COLLADA_SOURCE_PROPERTY, URL(lArrayID));
    DAE_AddAttribute(lAccessElement, COLLADA_COUNT_PROPERTY, pCount);
    DAE_AddAttribute(lAccessElement, COLLADA_STRIDE_PROPERTY, pStride);

    for (int lStrideIndex = 0; lStrideIndex < pStride; ++lStrideIndex)
    {
        xmlNode * lParamElement = DAE_AddChildElement(lAccessElement, COLLADA_PARAMETER_STRUCTURE);
        DAE_AddAttribute(lParamElement, COLLADA_TYPE_PROPERTY, TypeToParameterTag<T>());
    }

    return lSourceElement;
}

template <typename TYPE> FbxLayerElementArray * PopulateLayerElementDirectArray(FbxLayerElement * pLayerElement, xmlNode * pSourceElement, int pSize)
{
    SourceElementContentAccessor<TYPE> lSourceElementAccessor(pSourceElement);

    FbxLayerElementTemplate<TYPE> * lLayerElement = (FbxLayerElementTemplate<TYPE> *)pLayerElement;
    lLayerElement->SetMappingMode(FbxLayerElement::eByPolygonVertex);
    lLayerElement->SetReferenceMode(FbxLayerElement::eIndexToDirect);
    lLayerElement->GetDirectArray().SetCount(lSourceElementAccessor.mCount);

    TYPE * lArray = NULL;
    lArray = lLayerElement->GetDirectArray().GetLocked(lArray);
    lSourceElementAccessor.GetArray((double *)lArray, 0, pSize,
        lSourceElementAccessor.mStride, 0, pSize, sizeof(TYPE)/sizeof(double), 1.0);
    lLayerElement->GetDirectArray().Release(&lArray, lArray);

    return &(lLayerElement->GetIndexArray());
}

#include <fbxsdk/fbxsdk_nsend.h>

#endif /* _FBXSDK_FILEIO_COLLADA_ELEMENT_H_ */