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diff --git a/src/mesh/assimp-master/code/AssetLib/STL/STLLoader.cpp b/src/mesh/assimp-master/code/AssetLib/STL/STLLoader.cpp
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+++ b/src/mesh/assimp-master/code/AssetLib/STL/STLLoader.cpp
@@ -0,0 +1,575 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+ copyright notice, this list of conditions and the
+ following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the
+ following disclaimer in the documentation and/or other
+ materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+ contributors may be used to endorse or promote products
+ derived from this software without specific prior
+ written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+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,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Implementation of the STL importer class */
+
+#ifndef ASSIMP_BUILD_NO_STL_IMPORTER
+
+#include "STLLoader.h"
+#include <assimp/ParsingUtils.h>
+#include <assimp/fast_atof.h>
+#include <assimp/importerdesc.h>
+#include <assimp/scene.h>
+#include <assimp/DefaultLogger.hpp>
+#include <assimp/IOSystem.hpp>
+#include <memory>
+
+using namespace Assimp;
+
+namespace {
+
+static const aiImporterDesc desc = {
+ "Stereolithography (STL) Importer",
+ "",
+ "",
+ "",
+ aiImporterFlags_SupportTextFlavour | aiImporterFlags_SupportBinaryFlavour,
+ 0,
+ 0,
+ 0,
+ 0,
+ "stl"
+};
+
+// A valid binary STL buffer should consist of the following elements, in order:
+// 1) 80 byte header
+// 2) 4 byte face count
+// 3) 50 bytes per face
+static bool IsBinarySTL(const char *buffer, unsigned int fileSize) {
+ if (fileSize < 84) {
+ return false;
+ }
+
+ const char *facecount_pos = buffer + 80;
+ uint32_t faceCount(0);
+ ::memcpy(&faceCount, facecount_pos, sizeof(uint32_t));
+ const uint32_t expectedBinaryFileSize = faceCount * 50 + 84;
+
+ return expectedBinaryFileSize == fileSize;
+}
+
+static const size_t BufferSize = 500;
+static const char UnicodeBoundary = 127;
+
+// An ascii STL buffer will begin with "solid NAME", where NAME is optional.
+// Note: The "solid NAME" check is necessary, but not sufficient, to determine
+// if the buffer is ASCII; a binary header could also begin with "solid NAME".
+static bool IsAsciiSTL(const char *buffer, unsigned int fileSize) {
+ if (IsBinarySTL(buffer, fileSize))
+ return false;
+
+ const char *bufferEnd = buffer + fileSize;
+
+ if (!SkipSpaces(&buffer)) {
+ return false;
+ }
+
+ if (buffer + 5 >= bufferEnd) {
+ return false;
+ }
+
+ bool isASCII(strncmp(buffer, "solid", 5) == 0);
+ if (isASCII) {
+ // A lot of importers are write solid even if the file is binary. So we have to check for ASCII-characters.
+ if (fileSize >= BufferSize) {
+ isASCII = true;
+ for (unsigned int i = 0; i < BufferSize; i++) {
+ if (buffer[i] > UnicodeBoundary) {
+ isASCII = false;
+ break;
+ }
+ }
+ }
+ }
+ return isASCII;
+}
+} // namespace
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+STLImporter::STLImporter() :
+ mBuffer(),
+ mFileSize(0),
+ mScene() {
+ // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+STLImporter::~STLImporter() {
+ // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the class can handle the format of the given file.
+bool STLImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+ static const char *tokens[] = { "STL", "solid" };
+ return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
+}
+
+// ------------------------------------------------------------------------------------------------
+const aiImporterDesc *STLImporter::GetInfo() const {
+ return &desc;
+}
+
+void addFacesToMesh(aiMesh *pMesh) {
+ pMesh->mFaces = new aiFace[pMesh->mNumFaces];
+ for (unsigned int i = 0, p = 0; i < pMesh->mNumFaces; ++i) {
+
+ aiFace &face = pMesh->mFaces[i];
+ face.mIndices = new unsigned int[face.mNumIndices = 3];
+ for (unsigned int o = 0; o < 3; ++o, ++p) {
+ face.mIndices[o] = p;
+ }
+ }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Imports the given file into the given scene structure.
+void STLImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
+ std::unique_ptr<IOStream> file(pIOHandler->Open(pFile, "rb"));
+
+ // Check whether we can read from the file
+ if (file.get() == nullptr) {
+ throw DeadlyImportError("Failed to open STL file ", pFile, ".");
+ }
+
+ mFileSize = (unsigned int)file->FileSize();
+
+ // allocate storage and copy the contents of the file to a memory buffer
+ // (terminate it with zero)
+ std::vector<char> buffer2;
+ TextFileToBuffer(file.get(), buffer2);
+
+ mScene = pScene;
+ mBuffer = &buffer2[0];
+
+ // the default vertex color is light gray.
+ mClrColorDefault.r = mClrColorDefault.g = mClrColorDefault.b = mClrColorDefault.a = (ai_real)0.6;
+
+ // allocate a single node
+ mScene->mRootNode = new aiNode();
+
+ bool bMatClr = false;
+
+ if (IsBinarySTL(mBuffer, mFileSize)) {
+ bMatClr = LoadBinaryFile();
+ } else if (IsAsciiSTL(mBuffer, mFileSize)) {
+ LoadASCIIFile(mScene->mRootNode);
+ } else {
+ throw DeadlyImportError("Failed to determine STL storage representation for ", pFile, ".");
+ }
+
+ // create a single default material, using a white diffuse color for consistency with
+ // other geometric types (e.g., PLY).
+ aiMaterial *pcMat = new aiMaterial();
+ aiString s;
+ s.Set(AI_DEFAULT_MATERIAL_NAME);
+ pcMat->AddProperty(&s, AI_MATKEY_NAME);
+
+ aiColor4D clrDiffuse(ai_real(1.0), ai_real(1.0), ai_real(1.0), ai_real(1.0));
+ if (bMatClr) {
+ clrDiffuse = mClrColorDefault;
+ }
+ pcMat->AddProperty(&clrDiffuse, 1, AI_MATKEY_COLOR_DIFFUSE);
+ pcMat->AddProperty(&clrDiffuse, 1, AI_MATKEY_COLOR_SPECULAR);
+ clrDiffuse = aiColor4D(ai_real(0.05), ai_real(0.05), ai_real(0.05), ai_real(1.0));
+ pcMat->AddProperty(&clrDiffuse, 1, AI_MATKEY_COLOR_AMBIENT);
+
+ mScene->mNumMaterials = 1;
+ mScene->mMaterials = new aiMaterial *[1];
+ mScene->mMaterials[0] = pcMat;
+
+ mBuffer = nullptr;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Read an ASCII STL file
+void STLImporter::LoadASCIIFile(aiNode *root) {
+ std::vector<aiMesh *> meshes;
+ std::vector<aiNode *> nodes;
+ const char *sz = mBuffer;
+ const char *bufferEnd = mBuffer + mFileSize;
+ std::vector<aiVector3D> positionBuffer;
+ std::vector<aiVector3D> normalBuffer;
+
+ // try to guess how many vertices we could have
+ // assume we'll need 160 bytes for each face
+ size_t sizeEstimate = std::max(1u, mFileSize / 160u) * 3;
+ positionBuffer.reserve(sizeEstimate);
+ normalBuffer.reserve(sizeEstimate);
+
+ while (IsAsciiSTL(sz, static_cast<unsigned int>(bufferEnd - sz))) {
+ std::vector<unsigned int> meshIndices;
+ aiMesh *pMesh = new aiMesh();
+ pMesh->mMaterialIndex = 0;
+ meshIndices.push_back((unsigned int)meshes.size());
+ meshes.push_back(pMesh);
+ aiNode *node = new aiNode;
+ node->mParent = root;
+ nodes.push_back(node);
+ SkipSpaces(&sz);
+ ai_assert(!IsLineEnd(sz));
+
+ sz += 5; // skip the "solid"
+ SkipSpaces(&sz);
+ const char *szMe = sz;
+ while (!::IsSpaceOrNewLine(*sz)) {
+ sz++;
+ }
+
+ size_t temp = (size_t)(sz - szMe);
+ // setup the name of the node
+ if ( temp ) {
+ if (temp >= MAXLEN) {
+ throw DeadlyImportError("STL: Node name too long");
+ }
+ std::string name(szMe, temp);
+ node->mName.Set(name.c_str());
+ pMesh->mName.Set(name.c_str());
+ } else {
+ mScene->mRootNode->mName.Set("<STL_ASCII>");
+ }
+
+ unsigned int faceVertexCounter = 3;
+ for (;;) {
+ // go to the next token
+ if (!SkipSpacesAndLineEnd(&sz)) {
+ // seems we're finished although there was no end marker
+ ASSIMP_LOG_WARN("STL: unexpected EOF. \'endsolid\' keyword was expected");
+ break;
+ }
+ // facet normal -0.13 -0.13 -0.98
+ if (!strncmp(sz, "facet", 5) && IsSpaceOrNewLine(*(sz + 5)) && *(sz + 5) != '\0') {
+
+ if (faceVertexCounter != 3) {
+ ASSIMP_LOG_WARN("STL: A new facet begins but the old is not yet complete");
+ }
+ faceVertexCounter = 0;
+ normalBuffer.push_back(aiVector3D());
+ aiVector3D *vn = &normalBuffer.back();
+
+ sz += 6;
+ SkipSpaces(&sz);
+ if (strncmp(sz, "normal", 6)) {
+ ASSIMP_LOG_WARN("STL: a facet normal vector was expected but not found");
+ } else {
+ if (sz[6] == '\0') {
+ throw DeadlyImportError("STL: unexpected EOF while parsing facet");
+ }
+ sz += 7;
+ SkipSpaces(&sz);
+ sz = fast_atoreal_move<ai_real>(sz, (ai_real &)vn->x);
+ SkipSpaces(&sz);
+ sz = fast_atoreal_move<ai_real>(sz, (ai_real &)vn->y);
+ SkipSpaces(&sz);
+ sz = fast_atoreal_move<ai_real>(sz, (ai_real &)vn->z);
+ normalBuffer.push_back(*vn);
+ normalBuffer.push_back(*vn);
+ }
+ } else if (!strncmp(sz, "vertex", 6) && ::IsSpaceOrNewLine(*(sz + 6))) { // vertex 1.50000 1.50000 0.00000
+ if (faceVertexCounter >= 3) {
+ ASSIMP_LOG_ERROR("STL: a facet with more than 3 vertices has been found");
+ ++sz;
+ } else {
+ if (sz[6] == '\0') {
+ throw DeadlyImportError("STL: unexpected EOF while parsing facet");
+ }
+ sz += 7;
+ SkipSpaces(&sz);
+ positionBuffer.push_back(aiVector3D());
+ aiVector3D *vn = &positionBuffer.back();
+ sz = fast_atoreal_move<ai_real>(sz, (ai_real &)vn->x);
+ SkipSpaces(&sz);
+ sz = fast_atoreal_move<ai_real>(sz, (ai_real &)vn->y);
+ SkipSpaces(&sz);
+ sz = fast_atoreal_move<ai_real>(sz, (ai_real &)vn->z);
+ faceVertexCounter++;
+ }
+ } else if (!::strncmp(sz, "endsolid", 8)) {
+ do {
+ ++sz;
+ } while (!::IsLineEnd(*sz));
+ SkipSpacesAndLineEnd(&sz);
+ // finished!
+ break;
+ } else { // else skip the whole identifier
+ do {
+ ++sz;
+ } while (!::IsSpaceOrNewLine(*sz));
+ }
+ }
+
+ if (positionBuffer.empty()) {
+ pMesh->mNumFaces = 0;
+ ASSIMP_LOG_WARN("STL: mesh is empty or invalid; no data loaded");
+ }
+ if (positionBuffer.size() % 3 != 0) {
+ pMesh->mNumFaces = 0;
+ throw DeadlyImportError("STL: Invalid number of vertices");
+ }
+ if (normalBuffer.size() != positionBuffer.size()) {
+ pMesh->mNumFaces = 0;
+ throw DeadlyImportError("Normal buffer size does not match position buffer size");
+ }
+
+ // only process positionbuffer when filled, else exception when accessing with index operator
+ // see line 353: only warning is triggered
+ // see line 373(now): access to empty positionbuffer with index operator forced exception
+ if (!positionBuffer.empty()) {
+ pMesh->mNumFaces = static_cast<unsigned int>(positionBuffer.size() / 3);
+ pMesh->mNumVertices = static_cast<unsigned int>(positionBuffer.size());
+ pMesh->mVertices = new aiVector3D[pMesh->mNumVertices];
+ for (size_t i=0; i<pMesh->mNumVertices; ++i ) {
+ pMesh->mVertices[i].x = positionBuffer[i].x;
+ pMesh->mVertices[i].y = positionBuffer[i].y;
+ pMesh->mVertices[i].z = positionBuffer[i].z;
+ }
+ positionBuffer.clear();
+ }
+ // also only process normalBuffer when filled, else exception when accessing with index operator
+ if (!normalBuffer.empty()) {
+ pMesh->mNormals = new aiVector3D[pMesh->mNumVertices];
+ for (size_t i=0; i<pMesh->mNumVertices; ++i ) {
+ pMesh->mNormals[i].x = normalBuffer[i].x;
+ pMesh->mNormals[i].y = normalBuffer[i].y;
+ pMesh->mNormals[i].z = normalBuffer[i].z;
+ }
+ normalBuffer.clear();
+ }
+
+ // now copy faces
+ addFacesToMesh(pMesh);
+
+ // assign the meshes to the current node
+ pushMeshesToNode(meshIndices, node);
+ }
+
+ // now add the loaded meshes
+ mScene->mNumMeshes = (unsigned int)meshes.size();
+ mScene->mMeshes = new aiMesh *[mScene->mNumMeshes];
+ for (size_t i = 0; i < meshes.size(); i++) {
+ mScene->mMeshes[i] = meshes[i];
+ }
+
+ root->mNumChildren = (unsigned int)nodes.size();
+ root->mChildren = new aiNode *[root->mNumChildren];
+ for (size_t i = 0; i < nodes.size(); ++i) {
+ root->mChildren[i] = nodes[i];
+ }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Read a binary STL file
+bool STLImporter::LoadBinaryFile() {
+ // allocate one mesh
+ mScene->mNumMeshes = 1;
+ mScene->mMeshes = new aiMesh *[1];
+ aiMesh *pMesh = mScene->mMeshes[0] = new aiMesh();
+ pMesh->mMaterialIndex = 0;
+
+ // skip the first 80 bytes
+ if (mFileSize < 84) {
+ throw DeadlyImportError("STL: file is too small for the header");
+ }
+ bool bIsMaterialise = false;
+
+ // search for an occurrence of "COLOR=" in the header
+ const unsigned char *sz2 = (const unsigned char *)mBuffer;
+ const unsigned char *const szEnd = sz2 + 80;
+ while (sz2 < szEnd) {
+
+ if ('C' == *sz2++ && 'O' == *sz2++ && 'L' == *sz2++ &&
+ 'O' == *sz2++ && 'R' == *sz2++ && '=' == *sz2++) {
+
+ // read the default vertex color for facets
+ bIsMaterialise = true;
+ ASSIMP_LOG_INFO("STL: Taking code path for Materialise files");
+ const ai_real invByte = (ai_real)1.0 / (ai_real)255.0;
+ mClrColorDefault.r = (*sz2++) * invByte;
+ mClrColorDefault.g = (*sz2++) * invByte;
+ mClrColorDefault.b = (*sz2++) * invByte;
+ mClrColorDefault.a = (*sz2++) * invByte;
+ break;
+ }
+ }
+ const unsigned char *sz = (const unsigned char *)mBuffer + 80;
+
+ // now read the number of facets
+ mScene->mRootNode->mName.Set("<STL_BINARY>");
+
+ pMesh->mNumFaces = *((uint32_t *)sz);
+ sz += 4;
+
+ if (mFileSize < 84 + pMesh->mNumFaces * 50) {
+ throw DeadlyImportError("STL: file is too small to hold all facets");
+ }
+
+ if (!pMesh->mNumFaces) {
+ throw DeadlyImportError("STL: file is empty. There are no facets defined");
+ }
+
+ pMesh->mNumVertices = pMesh->mNumFaces * 3;
+
+ aiVector3D *vp = pMesh->mVertices = new aiVector3D[pMesh->mNumVertices];
+ aiVector3D *vn = pMesh->mNormals = new aiVector3D[pMesh->mNumVertices];
+
+ typedef aiVector3t<float> aiVector3F;
+ aiVector3F *theVec;
+ aiVector3F theVec3F;
+
+ for (unsigned int i = 0; i < pMesh->mNumFaces; ++i) {
+ // NOTE: Blender sometimes writes empty normals ... this is not
+ // our fault ... the RemoveInvalidData helper step should fix that
+
+ // There's one normal for the face in the STL; use it three times
+ // for vertex normals
+ theVec = (aiVector3F *)sz;
+ ::memcpy(&theVec3F, theVec, sizeof(aiVector3F));
+ vn->x = theVec3F.x;
+ vn->y = theVec3F.y;
+ vn->z = theVec3F.z;
+ *(vn + 1) = *vn;
+ *(vn + 2) = *vn;
+ ++theVec;
+ vn += 3;
+
+ // vertex 1
+ ::memcpy(&theVec3F, theVec, sizeof(aiVector3F));
+ vp->x = theVec3F.x;
+ vp->y = theVec3F.y;
+ vp->z = theVec3F.z;
+ ++theVec;
+ ++vp;
+
+ // vertex 2
+ ::memcpy(&theVec3F, theVec, sizeof(aiVector3F));
+ vp->x = theVec3F.x;
+ vp->y = theVec3F.y;
+ vp->z = theVec3F.z;
+ ++theVec;
+ ++vp;
+
+ // vertex 3
+ ::memcpy(&theVec3F, theVec, sizeof(aiVector3F));
+ vp->x = theVec3F.x;
+ vp->y = theVec3F.y;
+ vp->z = theVec3F.z;
+ ++theVec;
+ ++vp;
+
+ sz = (const unsigned char *)theVec;
+
+ uint16_t color = *((uint16_t *)sz);
+ sz += 2;
+
+ if (color & (1 << 15)) {
+ // seems we need to take the color
+ if (!pMesh->mColors[0]) {
+ pMesh->mColors[0] = new aiColor4D[pMesh->mNumVertices];
+ for (unsigned int j = 0; j < pMesh->mNumVertices; ++j) {
+ *pMesh->mColors[0]++ = mClrColorDefault;
+ }
+ pMesh->mColors[0] -= pMesh->mNumVertices;
+
+ ASSIMP_LOG_INFO("STL: Mesh has vertex colors");
+ }
+ aiColor4D *clr = &pMesh->mColors[0][i * 3];
+ clr->a = 1.0;
+ const ai_real invVal((ai_real)1.0 / (ai_real)31.0);
+ if (bIsMaterialise) // this is reversed
+ {
+ clr->r = (color & 0x31u) * invVal;
+ clr->g = ((color & (0x31u << 5)) >> 5u) * invVal;
+ clr->b = ((color & (0x31u << 10)) >> 10u) * invVal;
+ } else {
+ clr->b = (color & 0x31u) * invVal;
+ clr->g = ((color & (0x31u << 5)) >> 5u) * invVal;
+ clr->r = ((color & (0x31u << 10)) >> 10u) * invVal;
+ }
+ // assign the color to all vertices of the face
+ *(clr + 1) = *clr;
+ *(clr + 2) = *clr;
+ }
+ }
+
+ // now copy faces
+ addFacesToMesh(pMesh);
+
+ aiNode *root = mScene->mRootNode;
+
+ // allocate one node
+ aiNode *node = new aiNode();
+ node->mParent = root;
+
+ root->mNumChildren = 1u;
+ root->mChildren = new aiNode *[root->mNumChildren];
+ root->mChildren[0] = node;
+
+ // add all created meshes to the single node
+ node->mNumMeshes = mScene->mNumMeshes;
+ node->mMeshes = new unsigned int[mScene->mNumMeshes];
+ for (unsigned int i = 0; i < mScene->mNumMeshes; ++i) {
+ node->mMeshes[i] = i;
+ }
+
+ if (bIsMaterialise && !pMesh->mColors[0]) {
+ // use the color as diffuse material color
+ return true;
+ }
+ return false;
+}
+
+void STLImporter::pushMeshesToNode(std::vector<unsigned int> &meshIndices, aiNode *node) {
+ ai_assert(nullptr != node);
+ if (meshIndices.empty()) {
+ return;
+ }
+
+ node->mNumMeshes = static_cast<unsigned int>(meshIndices.size());
+ node->mMeshes = new unsigned int[meshIndices.size()];
+ for (size_t i = 0; i < meshIndices.size(); ++i) {
+ node->mMeshes[i] = meshIndices[i];
+ }
+ meshIndices.clear();
+}
+
+#endif // !! ASSIMP_BUILD_NO_STL_IMPORTER
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-25 01:26:04 +0000