STL loader can now handle more than one mesh in a single ascii file.
Andreas Henne
parent
ee98c80654
commit
59b0819866
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@ -131,6 +131,19 @@ const aiImporterDesc* STLImporter::GetInfo () const
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return &desc;
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}
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void addFacesToMesh(aiMesh* pMesh)
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{
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pMesh->mFaces = new aiFace[pMesh->mNumFaces];
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for (unsigned int i = 0, p = 0; i < pMesh->mNumFaces;++i) {
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aiFace& face = pMesh->mFaces[i];
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face.mIndices = new unsigned int[face.mNumIndices = 3];
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for (unsigned int o = 0; o < 3;++o,++p) {
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face.mIndices[o] = p;
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}
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}
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}
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// ------------------------------------------------------------------------------------------------
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// Imports the given file into the given scene structure.
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void STLImporter::InternReadFile( const std::string& pFile,
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@ -156,17 +169,8 @@ void STLImporter::InternReadFile( const std::string& pFile,
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// the default vertex color is light gray.
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clrColorDefault.r = clrColorDefault.g = clrColorDefault.b = clrColorDefault.a = 0.6f;
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// allocate one mesh
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pScene->mNumMeshes = 1;
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pScene->mMeshes = new aiMesh*[1];
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aiMesh* pMesh = pScene->mMeshes[0] = new aiMesh();
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pMesh->mMaterialIndex = 0;
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// allocate a single node
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pScene->mRootNode = new aiNode();
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pScene->mRootNode->mNumMeshes = 1;
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pScene->mRootNode->mMeshes = new unsigned int[1];
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pScene->mRootNode->mMeshes[0] = 0;
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// allocate a single node
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pScene->mRootNode = new aiNode();
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bool bMatClr = false;
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@ -178,16 +182,12 @@ void STLImporter::InternReadFile( const std::string& pFile,
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throw DeadlyImportError( "Failed to determine STL storage representation for " + pFile + ".");
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}
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// now copy faces
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pMesh->mFaces = new aiFace[pMesh->mNumFaces];
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for (unsigned int i = 0, p = 0; i < pMesh->mNumFaces;++i) {
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aiFace& face = pMesh->mFaces[i];
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face.mIndices = new unsigned int[face.mNumIndices = 3];
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for (unsigned int o = 0; o < 3;++o,++p) {
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face.mIndices[o] = p;
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}
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}
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// add all created meshes to the single node
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pScene->mRootNode = new aiNode();
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pScene->mRootNode->mNumMeshes = pScene->mNumMeshes;
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pScene->mRootNode->mMeshes = new unsigned int[pScene->mNumMeshes];
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for (uint i = 0; i < pScene->mNumMeshes; i++)
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pScene->mRootNode->mMeshes[i] = i;
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// create a single default material, using a light gray diffuse color for consistency with
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// other geometric types (e.g., PLY).
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@ -213,140 +213,165 @@ void STLImporter::InternReadFile( const std::string& pFile,
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// Read an ASCII STL file
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void STLImporter::LoadASCIIFile()
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{
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aiMesh* pMesh = pScene->mMeshes[0];
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std::vector<aiMesh*> meshes;
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const char* sz = mBuffer;
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const char* bufferEnd = mBuffer + fileSize;
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std::vector<aiVector3D> positionBuffer;
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std::vector<aiVector3D> normalBuffer;
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const char* sz = mBuffer;
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SkipSpaces(&sz);
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ai_assert(!IsLineEnd(sz));
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// try to guess how many vertices we could have
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// assume we'll need 160 bytes for each face
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size_t sizeEstimate = std::max(1u, fileSize / 160u ) * 3;
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positionBuffer.reserve(sizeEstimate);
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normalBuffer.reserve(sizeEstimate);
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sz += 5; // skip the "solid"
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SkipSpaces(&sz);
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const char* szMe = sz;
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while (!::IsSpaceOrNewLine(*sz)) {
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sz++;
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}
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while (IsAsciiSTL(sz, bufferEnd - sz))
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{
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aiMesh* pMesh = new aiMesh();
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pMesh->mMaterialIndex = 0;
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meshes.push_back(pMesh);
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size_t temp;
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// setup the name of the node
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if ((temp = (size_t)(sz-szMe))) {
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if (temp >= MAXLEN) {
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throw DeadlyImportError( "STL: Node name too long" );
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}
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SkipSpaces(&sz);
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ai_assert(!IsLineEnd(sz));
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pScene->mRootNode->mName.length = temp;
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memcpy(pScene->mRootNode->mName.data,szMe,temp);
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pScene->mRootNode->mName.data[temp] = '\0';
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}
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else pScene->mRootNode->mName.Set("<STL_ASCII>");
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sz += 5; // skip the "solid"
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SkipSpaces(&sz);
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const char* szMe = sz;
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while (!::IsSpaceOrNewLine(*sz)) {
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sz++;
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}
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// try to guess how many vertices we could have
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// assume we'll need 160 bytes for each face
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pMesh->mNumVertices = ( pMesh->mNumFaces = std::max(1u,fileSize / 160u )) * 3;
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pMesh->mVertices = new aiVector3D[pMesh->mNumVertices];
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pMesh->mNormals = new aiVector3D[pMesh->mNumVertices];
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unsigned int curFace = 0, curVertex = 3;
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for ( ;; )
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{
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// go to the next token
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if(!SkipSpacesAndLineEnd(&sz))
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{
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// seems we're finished although there was no end marker
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DefaultLogger::get()->warn("STL: unexpected EOF. \'endsolid\' keyword was expected");
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break;
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}
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// facet normal -0.13 -0.13 -0.98
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if (!strncmp(sz,"facet",5) && IsSpaceOrNewLine(*(sz+5))) {
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size_t temp;
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// setup the name of the node
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if ((temp = (size_t)(sz-szMe))) {
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if (temp >= MAXLEN) {
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throw DeadlyImportError( "STL: Node name too long" );
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}
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if (3 != curVertex) {
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DefaultLogger::get()->warn("STL: A new facet begins but the old is not yet complete");
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}
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if (pMesh->mNumFaces == curFace) {
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ai_assert(pMesh->mNumFaces != 0);
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pScene->mRootNode->mName.length = temp;
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memcpy(pScene->mRootNode->mName.data,szMe,temp);
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pScene->mRootNode->mName.data[temp] = '\0';
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}
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else pScene->mRootNode->mName.Set("<STL_ASCII>");
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// need to resize the arrays, our size estimate was wrong
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unsigned int iNeededSize = (unsigned int)(sz-mBuffer) / pMesh->mNumFaces;
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if (iNeededSize <= 160)iNeededSize >>= 1; // prevent endless looping
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unsigned int add = (unsigned int)((mBuffer+fileSize)-sz) / iNeededSize;
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add += add >> 3; // add 12.5% as buffer
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iNeededSize = (pMesh->mNumFaces + add)*3;
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aiVector3D* pv = new aiVector3D[iNeededSize];
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memcpy(pv,pMesh->mVertices,pMesh->mNumVertices*sizeof(aiVector3D));
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delete[] pMesh->mVertices;
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pMesh->mVertices = pv;
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pv = new aiVector3D[iNeededSize];
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memcpy(pv,pMesh->mNormals,pMesh->mNumVertices*sizeof(aiVector3D));
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delete[] pMesh->mNormals;
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pMesh->mNormals = pv;
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uint faceVertexCounter = 0;
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for ( ;; )
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{
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// go to the next token
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if(!SkipSpacesAndLineEnd(&sz))
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{
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// seems we're finished although there was no end marker
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DefaultLogger::get()->warn("STL: unexpected EOF. \'endsolid\' keyword was expected");
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break;
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}
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// facet normal -0.13 -0.13 -0.98
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if (!strncmp(sz,"facet",5) && IsSpaceOrNewLine(*(sz+5))) {
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pMesh->mNumVertices = iNeededSize;
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pMesh->mNumFaces += add;
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}
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aiVector3D* vn = &pMesh->mNormals[curFace++*3];
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if (faceVertexCounter != 3) {
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DefaultLogger::get()->warn("STL: A new facet begins but the old is not yet complete");
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}
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faceVertexCounter = 0;
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normalBuffer.push_back(aiVector3D());
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aiVector3D* vn = &normalBuffer.back();
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sz += 6;
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curVertex = 0;
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SkipSpaces(&sz);
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if (strncmp(sz,"normal",6)) {
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DefaultLogger::get()->warn("STL: a facet normal vector was expected but not found");
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}
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else
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{
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sz += 7;
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->x );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->y );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->z );
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*(vn+1) = *vn;
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*(vn+2) = *vn;
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}
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}
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// vertex 1.50000 1.50000 0.00000
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else if (!strncmp(sz,"vertex",6) && ::IsSpaceOrNewLine(*(sz+6)))
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{
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if (3 == curVertex) {
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DefaultLogger::get()->error("STL: a facet with more than 3 vertices has been found");
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++sz;
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}
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else
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{
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sz += 7;
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SkipSpaces(&sz);
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aiVector3D* vn = &pMesh->mVertices[(curFace-1)*3 + curVertex++];
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sz = fast_atoreal_move<float>(sz, (float&)vn->x );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->y );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->z );
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}
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}
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else if (!::strncmp(sz,"endsolid",8)) {
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// finished!
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break;
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}
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// else skip the whole identifier
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else {
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do {
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++sz;
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} while (!::IsSpaceOrNewLine(*sz));
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}
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}
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sz += 6;
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SkipSpaces(&sz);
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if (strncmp(sz,"normal",6)) {
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DefaultLogger::get()->warn("STL: a facet normal vector was expected but not found");
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}
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else
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{
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sz += 7;
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->x );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->y );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->z );
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normalBuffer.push_back(*vn);
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normalBuffer.push_back(*vn);
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}
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}
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// vertex 1.50000 1.50000 0.00000
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else if (!strncmp(sz,"vertex",6) && ::IsSpaceOrNewLine(*(sz+6)))
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{
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if (faceVertexCounter >= 3) {
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DefaultLogger::get()->error("STL: a facet with more than 3 vertices has been found");
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++sz;
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}
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else
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{
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sz += 7;
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SkipSpaces(&sz);
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positionBuffer.push_back(aiVector3D());
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aiVector3D* vn = &positionBuffer.back();
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sz = fast_atoreal_move<float>(sz, (float&)vn->x );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->y );
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SkipSpaces(&sz);
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sz = fast_atoreal_move<float>(sz, (float&)vn->z );
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faceVertexCounter++;
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}
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}
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else if (!::strncmp(sz,"endsolid",8)) {
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do {
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++sz;
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} while (!::IsLineEnd(*sz));
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SkipSpacesAndLineEnd(&sz);
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// finished!
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break;
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}
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// else skip the whole identifier
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else {
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do {
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++sz;
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} while (!::IsSpaceOrNewLine(*sz));
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}
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}
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if (!curFace) {
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pMesh->mNumFaces = 0;
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throw DeadlyImportError("STL: ASCII file is empty or invalid; no data loaded");
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}
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pMesh->mNumFaces = curFace;
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pMesh->mNumVertices = curFace*3;
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// we are finished!
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if (positionBuffer.empty()) {
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pMesh->mNumFaces = 0;
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throw DeadlyImportError("STL: ASCII file is empty or invalid; no data loaded");
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}
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if (positionBuffer.size() % 3 != 0) {
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pMesh->mNumFaces = 0;
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throw DeadlyImportError("STL: Invalid number of vertices");
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}
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if (normalBuffer.size() != positionBuffer.size()) {
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pMesh->mNumFaces = 0;
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throw DeadlyImportError("Normal buffer size does not match position buffer size");
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}
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pMesh->mNumFaces = positionBuffer.size() / 3;
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pMesh->mNumVertices = positionBuffer.size();
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pMesh->mVertices = new aiVector3D[pMesh->mNumVertices];
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memcpy(pMesh->mVertices, &positionBuffer[0].x, pMesh->mNumVertices * sizeof(aiVector3D));
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positionBuffer.clear();
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pMesh->mNormals = new aiVector3D[pMesh->mNumVertices];
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memcpy(pMesh->mNormals, &normalBuffer[0].x, pMesh->mNumVertices * sizeof(aiVector3D));
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normalBuffer.clear();
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// now copy faces
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addFacesToMesh(pMesh);
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}
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// now add the loaded meshes
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pScene->mNumMeshes = (unsigned int)meshes.size();
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pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];
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for (size_t i = 0; i < meshes.size(); i++)
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{
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pScene->mMeshes[i] = meshes[i];
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}
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}
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// ------------------------------------------------------------------------------------------------
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// Read a binary STL file
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bool STLImporter::LoadBinaryFile()
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{
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// allocate one mesh
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pScene->mNumMeshes = 1;
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pScene->mMeshes = new aiMesh*[1];
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aiMesh* pMesh = pScene->mMeshes[0] = new aiMesh();
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pMesh->mMaterialIndex = 0;
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// skip the first 80 bytes
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if (fileSize < 84) {
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throw DeadlyImportError("STL: file is too small for the header");
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@ -374,7 +399,6 @@ bool STLImporter::LoadBinaryFile()
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const unsigned char* sz = (const unsigned char*)mBuffer + 80;
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// now read the number of facets
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aiMesh* pMesh = pScene->mMeshes[0];
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pScene->mRootNode->mName.Set("<STL_BINARY>");
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pMesh->mNumFaces = *((uint32_t*)sz);
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@ -447,6 +471,10 @@ bool STLImporter::LoadBinaryFile()
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*(clr+2) = *clr;
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}
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}
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// now copy faces
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addFacesToMesh(pMesh);
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if (bIsMaterialise && !pMesh->mColors[0])
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{
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// use the color as diffuse material color
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