issue_1973
added support for CustomData(Layer) to support multiple (texture) UV mappings added unittest with sample model
This commit is contained in:
CwTCwT
212
code/BlenderCustomData.cpp
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212
code/BlenderCustomData.cpp
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#pragma once
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#include "BlenderCustomData.h"
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#include <array>
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namespace Assimp {
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namespace Blender
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{
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/**
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* @brief read/convert of Structure array to memory
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*/
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template<typename T>
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bool read(const Structure &s, T *p, const size_t cnt, const FileDatabase &db) {
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for (size_t i = 0; i < cnt; ++i) {
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T read;
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s.Convert(read, db);
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*p = read;
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p++;
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}
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return true;
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}
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/**
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* @brief pointer to function read memory for n CustomData types
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*/
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typedef bool(*PRead)(void *pOut, const size_t cnt, const FileDatabase &db);
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/**
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* @brief pointer to function read memory for cnt CustomData types
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*/
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typedef void *(*PAlloc)(const size_t cnt);
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/**
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* @brief helper macro to define Structure specific read function
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* for ex: when used like
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*
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* IMPL_STRUCT_READ(MLoop)
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*
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* following function is implemented
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*
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* bool readMLoop(void *v, const size_t cnt, const FileDatabase &db) {
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* return read<MLoop>(db.dna["MLoop"], static_cast<MLoop *>(v), cnt, db);
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* }
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*/
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#define IMPL_STRUCT_READ(ty) \
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bool read##ty(void *v, const size_t cnt, const FileDatabase &db) { \
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return read<ty>(db.dna[#ty], static_cast<ty *>(v), cnt, db); \
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}
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/**
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* @brief helper macro to define Structure specific alloc function
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* for ex: when used like
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*
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* IMPL_STRUCT_ALLOC(MLoop)
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*
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* following function is implemented
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*
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* void * allocMLoop(const size_t cnt) {
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* return new uint8_t[cnt * sizeof MLoop];
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* }
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*/
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#define IMPL_STRUCT_ALLOC(ty) \
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void *alloc##ty(const size_t cnt) { \
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return new uint8_t[cnt * sizeof ty]; \
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}
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/**
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* @brief helper macro to define Structure functions
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*/
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#define IMPL_STRUCT(ty) \
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IMPL_STRUCT_ALLOC(ty) \
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IMPL_STRUCT_READ(ty)
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// supported structures for CustomData
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IMPL_STRUCT(MVert)
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IMPL_STRUCT(MEdge)
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IMPL_STRUCT(MFace)
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IMPL_STRUCT(MTFace)
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IMPL_STRUCT(MTexPoly)
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IMPL_STRUCT(MLoopUV)
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IMPL_STRUCT(MLoopCol)
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IMPL_STRUCT(MPoly)
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IMPL_STRUCT(MLoop)
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/**
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* @brief describes the size of data and the read function to be used for single CustomerData.type
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*/
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struct CustomDataTypeDescription
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{
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PRead Read; ///< function to read one CustomData type element
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PAlloc Alloc; ///< function to allocate n type elements
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};
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/**
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* @brief shortcut for array of CustomDataTypeDescription
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*/
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typedef std::array<CustomDataTypeDescription, CD_NUMTYPES> CustomDataTypeDescriptions;
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/**
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* @brief helper macro to define Structure type specific CustomDataTypeDescription
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* @note IMPL_STRUCT_READ for same ty must be used earlier to implement the typespecific read function
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*/
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#define DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(ty) \
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CustomDataTypeDescription{ &read##ty, &alloc##ty }
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/**
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* @brief helper macro to define CustomDataTypeDescription for UNSUPPORTED type
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*/
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#define DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION \
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CustomDataTypeDescription{ nullptr, nullptr }
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/**
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* @brief descriptors for data pointed to from CustomDataLayer.data
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* @note some of the CustomData uses already well defined Structures
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* other (like CD_ORCO, ...) uses arrays of rawtypes or even arrays of Structures
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* use a special readfunction for that cases
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*/
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CustomDataTypeDescriptions customDataTypeDescriptions =
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{
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MVert),
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MEdge),
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MFace),
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MTFace),
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MTexPoly),
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MLoopUV),
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MLoopCol),
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MPoly),
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DECL_STRUCT_CUSTOMDATATYPEDESCRIPTION(MLoop),
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION,
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DECL_UNSUPPORTED_CUSTOMDATATYPEDESCRIPTION
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};
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bool isValidCustomDataType(const int cdtype)
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{
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return cdtype >= 0 && cdtype < CD_NUMTYPES;
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}
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bool readCustomData(std::shared_ptr<void> &out, const CustomDataType cdtype, const size_t cnt, const FileDatabase &db)
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{
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if (!isValidCustomDataType(cdtype))
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{
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throw Error((Formatter::format(), "CustomData.type ", cdtype, " out of index"));
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}
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const CustomDataTypeDescription cdtd = customDataTypeDescriptions[cdtype];
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if (cdtd.Read && cdtd.Alloc)
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{
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// allocate cnt elements and parse them from file
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out.reset(cdtd.Alloc(cnt));
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return cdtd.Read(out.get(), cnt, db);
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}
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return false;
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}
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std::shared_ptr<CustomDataLayer> getCustomDataLayer(const CustomData &customdata, const CustomDataType cdtype, const std::string &name)
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{
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for (auto it = customdata.layers.begin(); it != customdata.layers.end(); ++it)
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{
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if (it->get()->type == cdtype && name == it->get()->name)
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{
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return *it;
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}
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}
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return nullptr;
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}
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const void * getCustomDataLayerData(const CustomData &customdata, const CustomDataType cdtype, const std::string &name)
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{
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const std::shared_ptr<CustomDataLayer> pLayer = getCustomDataLayer(customdata, cdtype, name);
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if (pLayer && pLayer->data)
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{
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return pLayer->data.get();
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}
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return nullptr;
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}
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}
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}
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