assimp/code/AMFImporter_Postprocess.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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All rights reserved.
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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/// \file AMFImporter_Postprocess.cpp
/// \brief Convert built scenegraph and objects to Assimp scenegraph.
/// \date 2016
/// \author smal.root@gmail.com
#ifndef ASSIMP_BUILD_NO_AMF_IMPORTER
#include "AMFImporter.hpp"
// Header files, Assimp.
#include "SceneCombiner.h"
#include "StandardShapes.h"
#include "StringUtils.h"
// Header files, stdlib.
#include <algorithm>
#include <iterator>
namespace Assimp
{
aiColor4D AMFImporter::SPP_Material::GetColor(const float pX, const float pY, const float pZ) const
{
aiColor4D tcol;
// Check if stored data are supported.
if(Composition.size() != 0)
{
throw DeadlyImportError("IME. GetColor for composition");
}
else if(Color->Composed)
{
throw DeadlyImportError("IME. GetColor, composed color");
}
else
{
tcol = Color->Color;
}
// Check if default color must be used
if((tcol.r == 0) && (tcol.g == 0) && (tcol.b == 0) && (tcol.a == 0))
{
tcol.r = 0.5f;
tcol.g = 0.5f;
tcol.b = 0.5f;
tcol.a = 1;
}
return tcol;
}
void AMFImporter::PostprocessHelper_CreateMeshDataArray(const CAMFImporter_NodeElement_Mesh& pNodeElement, std::vector<aiVector3D>& pVertexCoordinateArray,
std::vector<CAMFImporter_NodeElement_Color*>& pVertexColorArray) const
{
CAMFImporter_NodeElement_Vertices* vn = nullptr;
size_t col_idx;
// All data stored in "vertices", search for it.
for(CAMFImporter_NodeElement* ne_child: pNodeElement.Child)
{
if(ne_child->Type == CAMFImporter_NodeElement::ENET_Vertices) vn = (CAMFImporter_NodeElement_Vertices*)ne_child;
}
// If "vertices" not found then no work for us.
if(vn == nullptr) return;
pVertexCoordinateArray.reserve(vn->Child.size());// all coordinates stored as child and we need to reserve space for future push_back's.
pVertexColorArray.resize(vn->Child.size());// colors count equal vertices count.
col_idx = 0;
// Inside vertices collect all data and place to arrays
for(CAMFImporter_NodeElement* vn_child: vn->Child)
{
// vertices, colors
if(vn_child->Type == CAMFImporter_NodeElement::ENET_Vertex)
{
// by default clear color for current vertex
pVertexColorArray[col_idx] = nullptr;
for(CAMFImporter_NodeElement* vtx: vn_child->Child)
{
if(vtx->Type == CAMFImporter_NodeElement::ENET_Coordinates)
{
pVertexCoordinateArray.push_back(((CAMFImporter_NodeElement_Coordinates*)vtx)->Coordinate);
continue;
}
if(vtx->Type == CAMFImporter_NodeElement::ENET_Color)
{
pVertexColorArray[col_idx] = (CAMFImporter_NodeElement_Color*)vtx;
continue;
}
}// for(CAMFImporter_NodeElement* vtx: vn_child->Child)
col_idx++;
}// if(vn_child->Type == CAMFImporter_NodeElement::ENET_Vertex)
}// for(CAMFImporter_NodeElement* vn_child: vn->Child)
}
size_t AMFImporter::PostprocessHelper_GetTextureID_Or_Create(const std::string& pID_R, const std::string& pID_G, const std::string& pID_B,
const std::string& pID_A)
{
size_t TextureConverted_Index;
std::string TextureConverted_ID;
// check input data
if(pID_R.empty() && pID_G.empty() && pID_B.empty() && pID_A.empty())
throw DeadlyImportError("PostprocessHelper_GetTextureID_Or_Create. At least one texture ID must be defined.");
// Create ID
TextureConverted_ID = pID_R + "_" + pID_G + "_" + pID_B + "_" + pID_A;
// Check if texture specified by set of IDs is converted already.
TextureConverted_Index = 0;
for(const SPP_Texture& tex_convd: mTexture_Converted)
{
if(tex_convd.ID == TextureConverted_ID)
return TextureConverted_Index;
else
TextureConverted_Index++;
}
//
// Converted texture not found, create it.
//
CAMFImporter_NodeElement_Texture* src_texture[4]{nullptr};
std::vector<CAMFImporter_NodeElement_Texture*> src_texture_4check;
SPP_Texture converted_texture;
{// find all specified source textures
CAMFImporter_NodeElement* t_tex;
// R
if(!pID_R.empty())
{
if(!Find_NodeElement(pID_R, CAMFImporter_NodeElement::ENET_Texture, &t_tex)) Throw_ID_NotFound(pID_R);
src_texture[0] = (CAMFImporter_NodeElement_Texture*)t_tex;
src_texture_4check.push_back((CAMFImporter_NodeElement_Texture*)t_tex);
}
else
{
src_texture[0] = nullptr;
}
// G
if(!pID_G.empty())
{
if(!Find_NodeElement(pID_G, CAMFImporter_NodeElement::ENET_Texture, &t_tex)) Throw_ID_NotFound(pID_G);
src_texture[1] = (CAMFImporter_NodeElement_Texture*)t_tex;
src_texture_4check.push_back((CAMFImporter_NodeElement_Texture*)t_tex);
}
else
{
src_texture[1] = nullptr;
}
// B
if(!pID_B.empty())
{
if(!Find_NodeElement(pID_B, CAMFImporter_NodeElement::ENET_Texture, &t_tex)) Throw_ID_NotFound(pID_B);
src_texture[2] = (CAMFImporter_NodeElement_Texture*)t_tex;
src_texture_4check.push_back((CAMFImporter_NodeElement_Texture*)t_tex);
}
else
{
src_texture[2] = nullptr;
}
// A
if(!pID_A.empty())
{
if(!Find_NodeElement(pID_A, CAMFImporter_NodeElement::ENET_Texture, &t_tex)) Throw_ID_NotFound(pID_A);
src_texture[3] = (CAMFImporter_NodeElement_Texture*)t_tex;
src_texture_4check.push_back((CAMFImporter_NodeElement_Texture*)t_tex);
}
else
{
src_texture[3] = nullptr;
}
}// END: find all specified source textures
// check that all textures has same size
if(src_texture_4check.size() > 1)
{
for (size_t i = 0, i_e = (src_texture_4check.size() - 1); i < i_e; i++)
{
if((src_texture_4check[i]->Width != src_texture_4check[i + 1]->Width) || (src_texture_4check[i]->Height != src_texture_4check[i + 1]->Height) ||
(src_texture_4check[i]->Depth != src_texture_4check[i + 1]->Depth))
{
throw DeadlyImportError("PostprocessHelper_GetTextureID_Or_Create. Source texture must has the same size.");
}
}
}// if(src_texture_4check.size() > 1)
// set texture attributes
converted_texture.Width = src_texture_4check[0]->Width;
converted_texture.Height = src_texture_4check[0]->Height;
converted_texture.Depth = src_texture_4check[0]->Depth;
// if one of source texture is tiled then converted texture is tiled too.
converted_texture.Tiled = false;
for(uint8_t i = 0; i < src_texture_4check.size(); i++) converted_texture.Tiled |= src_texture_4check[i]->Tiled;
// Create format hint.
strcpy(converted_texture.FormatHint, "rgba0000");// copy initial string.
if(!pID_R.empty()) converted_texture.FormatHint[4] = '8';
if(!pID_G.empty()) converted_texture.FormatHint[5] = '8';
if(!pID_B.empty()) converted_texture.FormatHint[6] = '8';
if(!pID_A.empty()) converted_texture.FormatHint[7] = '8';
//
// Сopy data of textures.
//
size_t tex_size = 0;
size_t step = 0;
size_t off_g = 0;
size_t off_b = 0;
// Calculate size of the target array and rule how data will be copied.
if(!pID_R.empty()) { tex_size += src_texture[0]->Data.size(); step++, off_g++, off_b++; }
if(!pID_G.empty()) { tex_size += src_texture[1]->Data.size(); step++, off_b++; }
if(!pID_B.empty()) { tex_size += src_texture[2]->Data.size(); step++; }
if(!pID_A.empty()) { tex_size += src_texture[3]->Data.size(); step++; }
// Create target array.
converted_texture.Data = new uint8_t[tex_size];
// And copy data
auto CopyTextureData = [&](const std::string& pID, const size_t pOffset, const size_t pStep, const uint8_t pSrcTexNum) -> void
{
if(!pID.empty())
{
for(size_t idx_target = pOffset, idx_src = 0; idx_target < tex_size; idx_target += pStep, idx_src++)
converted_texture.Data[idx_target] = src_texture[pSrcTexNum]->Data.at(idx_src);
}
};// auto CopyTextureData = [&](const size_t pOffset, const size_t pStep, const uint8_t pSrcTexNum) -> void
CopyTextureData(pID_R, 0, step, 0);
CopyTextureData(pID_G, off_g, step, 1);
CopyTextureData(pID_B, off_b, step, 2);
CopyTextureData(pID_A, step - 1, step, 3);
// Store new converted texture ID
converted_texture.ID = TextureConverted_ID;
// Store new converted texture
mTexture_Converted.push_back(converted_texture);
return TextureConverted_Index;
}
void AMFImporter::PostprocessHelper_SplitFacesByTextureID(std::list<SComplexFace>& pInputList, std::list<std::list<SComplexFace> >& pOutputList_Separated)
{
auto texmap_is_equal = [](const CAMFImporter_NodeElement_TexMap* pTexMap1, const CAMFImporter_NodeElement_TexMap* pTexMap2) -> bool
{
if((pTexMap1 == nullptr) && (pTexMap2 == nullptr)) return true;
if(pTexMap1 == nullptr) return false;
if(pTexMap2 == nullptr) return false;
if(pTexMap1->TextureID_R != pTexMap2->TextureID_R) return false;
if(pTexMap1->TextureID_G != pTexMap2->TextureID_G) return false;
if(pTexMap1->TextureID_B != pTexMap2->TextureID_B) return false;
if(pTexMap1->TextureID_A != pTexMap2->TextureID_A) return false;
return true;
};
pOutputList_Separated.clear();
if(pInputList.size() == 0) return;
do
{
SComplexFace face_start = pInputList.front();
std::list<SComplexFace> face_list_cur;
for(std::list<SComplexFace>::iterator it = pInputList.begin(), it_end = pInputList.end(); it != it_end;)
{
if(texmap_is_equal(face_start.TexMap, it->TexMap))
{
auto it_old = it;
it++;
face_list_cur.push_back(*it_old);
pInputList.erase(it_old);
}
else
{
it++;
}
}
if(face_list_cur.size() > 0) pOutputList_Separated.push_back(face_list_cur);
} while(pInputList.size() > 0);
}
void AMFImporter::Postprocess_AddMetadata(const std::list<CAMFImporter_NodeElement_Metadata*>& pMetadataList, aiNode& pSceneNode) const
{
if(pMetadataList.size() > 0)
{
if(pSceneNode.mMetaData != nullptr) throw DeadlyImportError("Postprocess. MetaData member in node are not nullptr. Something went wrong.");
// copy collected metadata to output node.
pSceneNode.mMetaData = new aiMetadata();
pSceneNode.mMetaData->mNumProperties = pMetadataList.size();
pSceneNode.mMetaData->mKeys = new aiString[pSceneNode.mMetaData->mNumProperties];
pSceneNode.mMetaData->mValues = new aiMetadataEntry[pSceneNode.mMetaData->mNumProperties];
size_t meta_idx = 0;
for(const CAMFImporter_NodeElement_Metadata& metadata: pMetadataList)
{
pSceneNode.mMetaData->Set(meta_idx++, metadata.Type, aiString(metadata.Value));
}
}// if(pMetadataList.size() > 0)
}
void AMFImporter::Postprocess_BuildNodeAndObject(const CAMFImporter_NodeElement_Object& pNodeElement, std::list<aiMesh*>& pMeshList, aiNode** pSceneNode)
{
CAMFImporter_NodeElement_Color* object_color = nullptr;
// create new aiNode and set name as <object> has.
*pSceneNode = new aiNode;
(*pSceneNode)->mName = pNodeElement.ID;
// read mesh and color
for(const CAMFImporter_NodeElement* ne_child: pNodeElement.Child)
{
std::vector<aiVector3D> vertex_arr;
std::vector<CAMFImporter_NodeElement_Color*> color_arr;
// color for object
if(ne_child->Type == CAMFImporter_NodeElement::ENET_Color) object_color = (CAMFImporter_NodeElement_Color*)ne_child;
if(ne_child->Type == CAMFImporter_NodeElement::ENET_Mesh)
{
// Create arrays from children of mesh: vertices.
PostprocessHelper_CreateMeshDataArray(*((CAMFImporter_NodeElement_Mesh*)ne_child), vertex_arr, color_arr);
// Use this arrays as a source when creating every aiMesh
Postprocess_BuildMeshSet(*((CAMFImporter_NodeElement_Mesh*)ne_child), vertex_arr, color_arr, object_color, pMeshList, **pSceneNode);
}
}// for(const CAMFImporter_NodeElement* ne_child: pNodeElement)
}
void AMFImporter::Postprocess_BuildMeshSet(const CAMFImporter_NodeElement_Mesh& pNodeElement, const std::vector<aiVector3D>& pVertexCoordinateArray,
const std::vector<CAMFImporter_NodeElement_Color*>& pVertexColorArray,
const CAMFImporter_NodeElement_Color* pObjectColor, std::list<aiMesh*>& pMeshList, aiNode& pSceneNode)
{
std::list<unsigned int> mesh_idx;
// all data stored in "volume", search for it.
for(const CAMFImporter_NodeElement* ne_child: pNodeElement.Child)
{
const CAMFImporter_NodeElement_Color* ne_volume_color = nullptr;
const SPP_Material* cur_mat = nullptr;
if(ne_child->Type == CAMFImporter_NodeElement::ENET_Volume)
{
/******************* Get faces *******************/
const CAMFImporter_NodeElement_Volume* ne_volume = reinterpret_cast<const CAMFImporter_NodeElement_Volume*>(ne_child);
std::list<SComplexFace> complex_faces_list;// List of the faces of the volume.
std::list<std::list<SComplexFace> > complex_faces_toplist;// List of the face list for every mesh.
// check if volume use material
if(!ne_volume->MaterialID.empty())
{
if(!Find_ConvertedMaterial(ne_volume->MaterialID, &cur_mat)) Throw_ID_NotFound(ne_volume->MaterialID);
}
// inside "volume" collect all data and place to arrays or create new objects
for(const CAMFImporter_NodeElement* ne_volume_child: ne_volume->Child)
{
// color for volume
if(ne_volume_child->Type == CAMFImporter_NodeElement::ENET_Color)
{
ne_volume_color = reinterpret_cast<const CAMFImporter_NodeElement_Color*>(ne_volume_child);
}
else if(ne_volume_child->Type == CAMFImporter_NodeElement::ENET_Triangle)// triangles, triangles colors
{
const CAMFImporter_NodeElement_Triangle& tri_al = *reinterpret_cast<const CAMFImporter_NodeElement_Triangle*>(ne_volume_child);
SComplexFace complex_face;
// initialize pointers
complex_face.Color = nullptr;
complex_face.TexMap = nullptr;
// get data from triangle children: color, texture coordinates.
if(tri_al.Child.size())
{
for(const CAMFImporter_NodeElement* ne_triangle_child: tri_al.Child)
{
if(ne_triangle_child->Type == CAMFImporter_NodeElement::ENET_Color)
complex_face.Color = reinterpret_cast<const CAMFImporter_NodeElement_Color*>(ne_triangle_child);
else if(ne_triangle_child->Type == CAMFImporter_NodeElement::ENET_TexMap)
complex_face.TexMap = reinterpret_cast<const CAMFImporter_NodeElement_TexMap*>(ne_triangle_child);
}
}// if(tri_al.Child.size())
// create new face and store it.
complex_face.Face.mNumIndices = 3;
complex_face.Face.mIndices = new unsigned int[3];
complex_face.Face.mIndices[0] = tri_al.V[0];
complex_face.Face.mIndices[1] = tri_al.V[1];
complex_face.Face.mIndices[2] = tri_al.V[2];
complex_faces_list.push_back(complex_face);
}
}// for(const CAMFImporter_NodeElement* ne_volume_child: ne_volume->Child)
/**** Split faces list: one list per mesh ****/
PostprocessHelper_SplitFacesByTextureID(complex_faces_list, complex_faces_toplist);
/***** Create mesh for every faces list ******/
for(std::list<SComplexFace>& face_list_cur: complex_faces_toplist)
{
auto VertexIndex_GetMinimal = [](const std::list<SComplexFace>& pFaceList, const size_t* pBiggerThan) -> size_t
{
size_t rv;
if(pBiggerThan != nullptr)
{
bool found = false;
for(const SComplexFace& face: pFaceList)
{
for(size_t idx_vert = 0; idx_vert < face.Face.mNumIndices; idx_vert++)
{
if(face.Face.mIndices[idx_vert] > *pBiggerThan)
{
rv = face.Face.mIndices[idx_vert];
found = true;
break;
}
}
if(found) break;
}
if(!found) return *pBiggerThan;
}
else
{
rv = pFaceList.front().Face.mIndices[0];
}// if(pBiggerThan != nullptr) else
for(const SComplexFace& face: pFaceList)
{
for(size_t vi = 0; vi < face.Face.mNumIndices; vi++)
{
if(face.Face.mIndices[vi] < rv)
{
if(pBiggerThan != nullptr)
{
if(face.Face.mIndices[vi] > *pBiggerThan) rv = face.Face.mIndices[vi];
}
else
{
rv = face.Face.mIndices[vi];
}
}
}
}// for(const SComplexFace& face: pFaceList)
return rv;
};// auto VertexIndex_GetMinimal = [](const std::list<SComplexFace>& pFaceList, const size_t* pBiggerThan) -> size_t
auto VertexIndex_Replace = [](std::list<SComplexFace>& pFaceList, const size_t pIdx_From, const size_t pIdx_To) -> void
{
for(const SComplexFace& face: pFaceList)
{
for(size_t vi = 0; vi < face.Face.mNumIndices; vi++)
{
if(face.Face.mIndices[vi] == pIdx_From) face.Face.mIndices[vi] = pIdx_To;
}
}
};// auto VertexIndex_Replace = [](std::list<SComplexFace>& pFaceList, const size_t pIdx_From, const size_t pIdx_To) -> void
auto Vertex_CalculateColor = [&](const size_t pIdx) -> aiColor4D
{
// Color priorities(In descending order):
// 1. triangle color;
// 2. vertex color;
// 3. volume color;
// 4. object color;
// 5. material;
// 6. default - invisible coat.
//
// Fill vertices colors in color priority list above that's points from 1 to 6.
if((pIdx < pVertexColorArray.size()) && (pVertexColorArray[pIdx] != nullptr))// check for vertex color
{
if(pVertexColorArray[pIdx]->Composed)
throw DeadlyImportError("IME: vertex color composed");
else
return pVertexColorArray[pIdx]->Color;
}
else if(ne_volume_color != nullptr)// check for volume color
{
if(ne_volume_color->Composed)
throw DeadlyImportError("IME: volume color composed");
else
return ne_volume_color->Color;
}
else if(pObjectColor != nullptr)// check for object color
{
if(pObjectColor->Composed)
throw DeadlyImportError("IME: object color composed");
else
return pObjectColor->Color;
}
else if(cur_mat != nullptr)// check for material
{
return cur_mat->GetColor(pVertexCoordinateArray.at(pIdx).x, pVertexCoordinateArray.at(pIdx).y, pVertexCoordinateArray.at(pIdx).z);
}
else// set default color.
{
return {0, 0, 0, 0};
}// if((vi < pVertexColorArray.size()) && (pVertexColorArray[vi] != nullptr)) else
};// auto Vertex_CalculateColor = [&](const size_t pIdx) -> aiColor4D
aiMesh* tmesh = new aiMesh;
tmesh->mPrimitiveTypes = aiPrimitiveType_TRIANGLE;// Only triangles is supported by AMF.
//
// set geometry and colors (vertices)
//
// copy faces/triangles
tmesh->mNumFaces = face_list_cur.size();
tmesh->mFaces = new aiFace[tmesh->mNumFaces];
// Create vertices list and optimize indices. Optimisation mean following.In AMF all volumes use one big list of vertices. And one volume
// can use only part of vertices list, for example: vertices list contain few thousands of vertices and volume use vertices 1, 3, 10.
// Do you need all this thousands of garbage? Of course no. So, optimisation step transformate sparse indices set to continuous.
size_t VertexCount_Max = tmesh->mNumFaces * 3;// 3 - triangles.
std::vector<aiVector3D> vert_arr, texcoord_arr;
std::vector<aiColor4D> col_arr;
vert_arr.reserve(VertexCount_Max * 2);// "* 2" - see below TODO.
col_arr.reserve(VertexCount_Max * 2);
{// fill arrays
size_t vert_idx_from, vert_idx_to;
// first iteration.
vert_idx_to = 0;
vert_idx_from = VertexIndex_GetMinimal(face_list_cur, nullptr);
vert_arr.push_back(pVertexCoordinateArray.at(vert_idx_from));
col_arr.push_back(Vertex_CalculateColor(vert_idx_from));
if(vert_idx_from != vert_idx_to) VertexIndex_Replace(face_list_cur, vert_idx_from, vert_idx_to);
// rest iterations
do
{
vert_idx_from = VertexIndex_GetMinimal(face_list_cur, &vert_idx_to);
if(vert_idx_from == vert_idx_to) break;// all indices are transfered,
vert_arr.push_back(pVertexCoordinateArray.at(vert_idx_from));
col_arr.push_back(Vertex_CalculateColor(vert_idx_from));
vert_idx_to++;
if(vert_idx_from != vert_idx_to) VertexIndex_Replace(face_list_cur, vert_idx_from, vert_idx_to);
} while(true);
}// fill arrays. END.
//
// check if triangle colors are used and create additional faces if needed.
//
for(const SComplexFace& face_cur: face_list_cur)
{
if(face_cur.Color != nullptr)
{
aiColor4D face_color;
size_t vert_idx_new = vert_arr.size();
if(face_cur.Color->Composed)
throw DeadlyImportError("IME: face color composed");
else
face_color = face_cur.Color->Color;
for(size_t idx_ind = 0; idx_ind < face_cur.Face.mNumIndices; idx_ind++)
{
vert_arr.push_back(vert_arr.at(face_cur.Face.mIndices[idx_ind]));
col_arr.push_back(face_color);
face_cur.Face.mIndices[idx_ind] = vert_idx_new++;
}
}// if(face_cur.Color != nullptr)
}// for(const SComplexFace& face_cur: face_list_cur)
//
// if texture is used then copy texture coordinates too.
//
if(face_list_cur.front().TexMap != nullptr)
{
size_t idx_vert_new = vert_arr.size();
///TODO: clean unused vertices. "* 2": in certain cases - mesh full of triangle colors - vert_arr will contain duplicated vertices for
/// colored triangles and initial vertices (for colored vertices) which in real became unused. This part need more thinking about
/// optimisation.
bool* idx_vert_used;
idx_vert_used = new bool[VertexCount_Max * 2];
for(size_t i = 0, i_e = VertexCount_Max * 2; i < i_e; i++) idx_vert_used[i] = false;
// This ID's will be used when set materials ID in scene.
tmesh->mMaterialIndex = PostprocessHelper_GetTextureID_Or_Create(face_list_cur.front().TexMap->TextureID_R,
face_list_cur.front().TexMap->TextureID_G,
face_list_cur.front().TexMap->TextureID_B,
face_list_cur.front().TexMap->TextureID_A);
texcoord_arr.resize(VertexCount_Max * 2);
for(const SComplexFace& face_cur: face_list_cur)
{
for(size_t idx_ind = 0; idx_ind < face_cur.Face.mNumIndices; idx_ind++)
{
const size_t idx_vert = face_cur.Face.mIndices[idx_ind];
if(!idx_vert_used[idx_vert])
{
texcoord_arr.at(idx_vert) = face_cur.TexMap->TextureCoordinate[idx_ind];
idx_vert_used[idx_vert] = true;
}
else if(texcoord_arr.at(idx_vert) != face_cur.TexMap->TextureCoordinate[idx_ind])
{
// in that case one vertex is shared with many texture coordinates. We need to duplicate vertex with another texture
// coordinates.
vert_arr.push_back(vert_arr.at(idx_vert));
col_arr.push_back(col_arr.at(idx_vert));
texcoord_arr.at(idx_vert_new) = face_cur.TexMap->TextureCoordinate[idx_ind];
face_cur.Face.mIndices[idx_ind] = idx_vert_new++;
}
}// for(size_t idx_ind = 0; idx_ind < face_cur.Face.mNumIndices; idx_ind++)
}// for(const SComplexFace& face_cur: face_list_cur)
delete [] idx_vert_used;
// shrink array
texcoord_arr.resize(idx_vert_new);
}// if(face_list_cur.front().TexMap != nullptr)
//
// copy collected data to mesh
//
tmesh->mNumVertices = vert_arr.size();
tmesh->mVertices = new aiVector3D[tmesh->mNumVertices];
tmesh->mColors[0] = new aiColor4D[tmesh->mNumVertices];
tmesh->mFaces = new aiFace[face_list_cur.size()];
memcpy(tmesh->mVertices, vert_arr.data(), tmesh->mNumVertices * sizeof(aiVector3D));
memcpy(tmesh->mColors[0], col_arr.data(), tmesh->mNumVertices * sizeof(aiColor4D));
if(texcoord_arr.size() > 0)
{
tmesh->mTextureCoords[0] = new aiVector3D[tmesh->mNumVertices];
memcpy(tmesh->mTextureCoords[0], texcoord_arr.data(), tmesh->mNumVertices * sizeof(aiVector3D));
tmesh->mNumUVComponents[0] = 2;// U and V stored in "x", "y" of aiVector3D.
}
size_t idx_face = 0;
for(const SComplexFace& face_cur: face_list_cur) tmesh->mFaces[idx_face++] = face_cur.Face;
// store new aiMesh
mesh_idx.push_back(pMeshList.size());
pMeshList.push_back(tmesh);
}// for(const std::list<SComplexFace>& face_list_cur: complex_faces_toplist)
}// if(ne_child->Type == CAMFImporter_NodeElement::ENET_Volume)
}// for(const CAMFImporter_NodeElement* ne_child: pNodeElement.Child)
// if meshes was created then assign new indices with current aiNode
if(mesh_idx.size() > 0)
{
std::list<unsigned int>::const_iterator mit = mesh_idx.begin();
pSceneNode.mNumMeshes = mesh_idx.size();
pSceneNode.mMeshes = new unsigned int[pSceneNode.mNumMeshes];
for(size_t i = 0; i < pSceneNode.mNumMeshes; i++) pSceneNode.mMeshes[i] = *mit++;
}// if(mesh_idx.size() > 0)
}
void AMFImporter::Postprocess_BuildMaterial(const CAMFImporter_NodeElement_Material& pMaterial)
{
SPP_Material new_mat;
new_mat.ID = pMaterial.ID;
for(const CAMFImporter_NodeElement* mat_child: pMaterial.Child)
{
if(mat_child->Type == CAMFImporter_NodeElement::ENET_Color)
{
new_mat.Color = (CAMFImporter_NodeElement_Color*)mat_child;
}
else if(mat_child->Type == CAMFImporter_NodeElement::ENET_Metadata)
{
new_mat.Metadata.push_back((CAMFImporter_NodeElement_Metadata*)mat_child);
}
}// for(const CAMFImporter_NodeElement* mat_child; pMaterial.Child)
// place converted material to special list
mMaterial_Converted.push_back(new_mat);
}
void AMFImporter::Postprocess_BuildConstellation(CAMFImporter_NodeElement_Constellation& pConstellation, std::list<aiNode*>& pNodeList) const
{
aiNode* con_node;
std::list<aiNode*> ch_node;
// We will build next hierarchy:
// aiNode as parent (<constellation>) for set of nodes as a children
// |- aiNode for transformation (<instance> -> <delta...>, <r...>) - aiNode for pointing to object ("objectid")
// ...
// \_ aiNode for transformation (<instance> -> <delta...>, <r...>) - aiNode for pointing to object ("objectid")
con_node = new aiNode;
con_node->mName = pConstellation.ID;
// Walk thru children and search for instances of another objects, constellations.
for(const CAMFImporter_NodeElement* ne: pConstellation.Child)
{
aiMatrix4x4 tmat;
aiNode* t_node;
aiNode* found_node;
if(ne->Type == CAMFImporter_NodeElement::ENET_Metadata) continue;
if(ne->Type != CAMFImporter_NodeElement::ENET_Instance) throw DeadlyImportError("Only <instance> nodes can be in <constellation>.");
// create alias for conveniance
CAMFImporter_NodeElement_Instance& als = *((CAMFImporter_NodeElement_Instance*)ne);
// find referenced object
if(!Find_ConvertedNode(als.ObjectID, pNodeList, &found_node)) Throw_ID_NotFound(als.ObjectID);
// create node for apllying transformation
t_node = new aiNode;
t_node->mParent = con_node;
// apply transformation
aiMatrix4x4::Translation(als.Delta, tmat), t_node->mTransformation *= tmat;
aiMatrix4x4::RotationX(als.Rotation.x, tmat), t_node->mTransformation *= tmat;
aiMatrix4x4::RotationY(als.Rotation.y, tmat), t_node->mTransformation *= tmat;
aiMatrix4x4::RotationZ(als.Rotation.z, tmat), t_node->mTransformation *= tmat;
// create array for one child node
t_node->mNumChildren = 1;
t_node->mChildren = new aiNode*[t_node->mNumChildren];
SceneCombiner::Copy(&t_node->mChildren[0], found_node);
t_node->mChildren[0]->mParent = t_node;
ch_node.push_back(t_node);
}// for(const CAMFImporter_NodeElement* ne: pConstellation.Child)
// copy found aiNode's as children
if(ch_node.size() == 0) throw DeadlyImportError("<constellation> must have at least one <instance>.");
size_t ch_idx = 0;
con_node->mNumChildren = ch_node.size();
con_node->mChildren = new aiNode*[con_node->mNumChildren];
for(aiNode* node: ch_node) con_node->mChildren[ch_idx++] = node;
// and place "root" of <constellation> node to node list
pNodeList.push_back(con_node);
}
void AMFImporter::Postprocess_BuildScene(aiScene* pScene)
{
std::list<aiNode*> node_list;
std::list<aiMesh*> mesh_list;
std::list<CAMFImporter_NodeElement_Metadata*> meta_list;
//
// Because for AMF "material" is just complex colors mixing so aiMaterial will not be used.
// For building aiScene we are must to do few steps:
// at first creating root node for aiScene.
pScene->mRootNode = new aiNode;
pScene->mRootNode->mParent = nullptr;
pScene->mFlags |= AI_SCENE_FLAGS_ALLOW_SHARED;
// search for root(<amf>) element
CAMFImporter_NodeElement* root_el = nullptr;
for(CAMFImporter_NodeElement* ne: mNodeElement_List)
{
if(ne->Type != CAMFImporter_NodeElement::ENET_Root) continue;
root_el = ne;
break;
}// for(const CAMFImporter_NodeElement* ne: mNodeElement_List)
// Check if root element are found.
if(root_el == nullptr) throw DeadlyImportError("Root(<amf>) element not found.");
// after that walk thru children of root and collect data. Five types of nodes can be placed at top level - in <amf>: <object>, <material>, <texture>,
// <constellation> and <metadata>. But at first we must read <material> and <texture> because they will be used in <object>. <metadata> can be read
// at any moment.
//
// 1. <material>
// 2. <texture> will be converted later when processing triangles list. \sa Postprocess_BuildMeshSet
for(const CAMFImporter_NodeElement* root_child: root_el->Child)
{
if(root_child->Type == CAMFImporter_NodeElement::ENET_Material) Postprocess_BuildMaterial(*((CAMFImporter_NodeElement_Material*)root_child));
}
// After "appearance" nodes we must read <object> because it will be used in <constellation> -> <instance>.
//
// 3. <object>
for(const CAMFImporter_NodeElement* root_child: root_el->Child)
{
if(root_child->Type == CAMFImporter_NodeElement::ENET_Object)
{
aiNode* tnode = nullptr;
// for <object> mesh and node must be built: object ID assigned to aiNode name and will be used in future for <instance>
Postprocess_BuildNodeAndObject(*((CAMFImporter_NodeElement_Object*)root_child), mesh_list, &tnode);
if(tnode != nullptr) node_list.push_back(tnode);
}
}// for(const CAMFImporter_NodeElement* root_child: root_el->Child)
// And finally read rest of nodes.
//
for(const CAMFImporter_NodeElement* root_child: root_el->Child)
{
// 4. <constellation>
if(root_child->Type == CAMFImporter_NodeElement::ENET_Constellation)
{
// <object> and <constellation> at top of self abstraction use aiNode. So we can use only aiNode list for creating new aiNode's.
Postprocess_BuildConstellation(*((CAMFImporter_NodeElement_Constellation*)root_child), node_list);
}
// 5, <metadata>
if(root_child->Type == CAMFImporter_NodeElement::ENET_Metadata) meta_list.push_back((CAMFImporter_NodeElement_Metadata*)root_child);
}// for(const CAMFImporter_NodeElement* root_child: root_el->Child)
// at now we can add collected metadata to root node
Postprocess_AddMetadata(meta_list, *pScene->mRootNode);
//
// Check constellation children
//
// As said in specification:
// "When multiple objects and constellations are defined in a single file, only the top level objects and constellations are available for printing."
// What that means? For example: if some object is used in constellation then you must show only constellation but not original object.
// And at this step we are checking that relations.
nl_clean_loop:
if(node_list.size() > 1)
{
// walk thru all nodes
for(std::list<aiNode*>::iterator nl_it = node_list.begin(); nl_it != node_list.end(); nl_it++)
{
// and try to find them in another top nodes.
std::list<aiNode*>::const_iterator next_it = nl_it;
next_it++;
for(; next_it != node_list.end(); next_it++)
{
if((*next_it)->FindNode((*nl_it)->mName) != nullptr)
{
// if current top node(nl_it) found in another top node then erase it from node_list and restart search loop.
node_list.erase(nl_it);
goto nl_clean_loop;
}
}// for(; next_it != node_list.end(); next_it++)
}// for(std::list<aiNode*>::const_iterator nl_it = node_list.begin(); nl_it != node_list.end(); nl_it++)
}
//
// move created objects to aiScene
//
//
// Nodes
if(node_list.size() > 0)
{
std::list<aiNode*>::const_iterator nl_it = node_list.begin();
pScene->mRootNode->mNumChildren = node_list.size();
pScene->mRootNode->mChildren = new aiNode*[pScene->mRootNode->mNumChildren];
for(size_t i = 0; i < pScene->mRootNode->mNumChildren; i++)
{
// Objects and constellation that must be showed placed at top of hierarchy in <amf> node. So all aiNode's in node_list must have
// mRootNode only as parent.
(*nl_it)->mParent = pScene->mRootNode;
pScene->mRootNode->mChildren[i] = *nl_it++;
}
}// if(node_list.size() > 0)
//
// Meshes
if(mesh_list.size() > 0)
{
std::list<aiMesh*>::const_iterator ml_it = mesh_list.begin();
pScene->mNumMeshes = mesh_list.size();
pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];
for(size_t i = 0; i < pScene->mNumMeshes; i++) pScene->mMeshes[i] = *ml_it++;
}// if(mesh_list.size() > 0)
//
// Textures
pScene->mNumTextures = mTexture_Converted.size();
if(pScene->mNumTextures > 0)
{
size_t idx;
idx = 0;
pScene->mTextures = new aiTexture*[pScene->mNumTextures];
for(const SPP_Texture& tex_convd: mTexture_Converted)
{
pScene->mTextures[idx] = new aiTexture;
pScene->mTextures[idx]->mWidth = tex_convd.Width;
pScene->mTextures[idx]->mHeight = tex_convd.Height;
pScene->mTextures[idx]->pcData = (aiTexel*)tex_convd.Data;
// texture format description.
strcpy(pScene->mTextures[idx]->achFormatHint, tex_convd.FormatHint);
idx++;
}// for(const SPP_Texture& tex_convd: mTexture_Converted)
// Create materials for embedded textures.
idx = 0;
pScene->mNumMaterials = mTexture_Converted.size();
pScene->mMaterials = new aiMaterial*[pScene->mNumMaterials];
for(const SPP_Texture& tex_convd: mTexture_Converted)
{
const aiString texture_id(AI_EMBEDDED_TEXNAME_PREFIX + to_string(idx));
const int mode = aiTextureOp_Multiply;
const int repeat = tex_convd.Tiled ? 1 : 0;
pScene->mMaterials[idx] = new aiMaterial;
pScene->mMaterials[idx]->AddProperty(&texture_id, AI_MATKEY_TEXTURE_DIFFUSE(0));
pScene->mMaterials[idx]->AddProperty(&mode, 1, AI_MATKEY_TEXOP_DIFFUSE(0));
pScene->mMaterials[idx]->AddProperty(&repeat, 1, AI_MATKEY_MAPPINGMODE_U_DIFFUSE(0));
pScene->mMaterials[idx]->AddProperty(&repeat, 1, AI_MATKEY_MAPPINGMODE_V_DIFFUSE(0));
idx++;
}
}// if(pScene->mNumTextures > 0)
}// END: after that walk thru children of root and collect data
}// namespace Assimp
#endif // !ASSIMP_BUILD_NO_AMF_IMPORTER