567 lines
16 KiB
C++
567 lines
16 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2012, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the
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following conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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----------------------------------------------------------------------
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*/
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/** @file IFCUtil.cpp
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* @brief Implementation of conversion routines for some common Ifc helper entities.
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*/
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#include "AssimpPCH.h"
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#ifndef ASSIMP_BUILD_NO_IFC_IMPORTER
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#include "IFCUtil.h"
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#include "PolyTools.h"
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#include "ProcessHelper.h"
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namespace Assimp {
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namespace IFC {
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// ------------------------------------------------------------------------------------------------
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void TempOpening::Transform(const IfcMatrix4& mat)
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{
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if(profileMesh) {
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profileMesh->Transform(mat);
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}
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extrusionDir *= IfcMatrix3(mat);
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}
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// ------------------------------------------------------------------------------------------------
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aiMesh* TempMesh::ToMesh()
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{
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ai_assert(verts.size() == std::accumulate(vertcnt.begin(),vertcnt.end(),size_t(0)));
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if (verts.empty()) {
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return NULL;
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}
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std::auto_ptr<aiMesh> mesh(new aiMesh());
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// copy vertices
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mesh->mNumVertices = static_cast<unsigned int>(verts.size());
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mesh->mVertices = new aiVector3D[mesh->mNumVertices];
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std::copy(verts.begin(),verts.end(),mesh->mVertices);
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// and build up faces
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mesh->mNumFaces = static_cast<unsigned int>(vertcnt.size());
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mesh->mFaces = new aiFace[mesh->mNumFaces];
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for(unsigned int i = 0,n=0, acc = 0; i < mesh->mNumFaces; ++n) {
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aiFace& f = mesh->mFaces[i];
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if (!vertcnt[n]) {
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--mesh->mNumFaces;
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continue;
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}
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f.mNumIndices = vertcnt[n];
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f.mIndices = new unsigned int[f.mNumIndices];
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for(unsigned int a = 0; a < f.mNumIndices; ++a) {
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f.mIndices[a] = acc++;
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}
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++i;
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}
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return mesh.release();
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}
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// ------------------------------------------------------------------------------------------------
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void TempMesh::Clear()
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{
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verts.clear();
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vertcnt.clear();
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}
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// ------------------------------------------------------------------------------------------------
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void TempMesh::Transform(const IfcMatrix4& mat)
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{
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BOOST_FOREACH(IfcVector3& v, verts) {
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v *= mat;
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}
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}
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// ------------------------------------------------------------------------------
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IfcVector3 TempMesh::Center() const
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{
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return std::accumulate(verts.begin(),verts.end(),IfcVector3()) / static_cast<IfcFloat>(verts.size());
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}
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// ------------------------------------------------------------------------------------------------
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void TempMesh::Append(const TempMesh& other)
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{
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verts.insert(verts.end(),other.verts.begin(),other.verts.end());
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vertcnt.insert(vertcnt.end(),other.vertcnt.begin(),other.vertcnt.end());
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}
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// ------------------------------------------------------------------------------------------------
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void TempMesh::RemoveDegenerates()
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{
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// The strategy is simple: walk the mesh and compute normals using
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// Newell's algorithm. The length of the normals gives the area
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// of the polygons, which is close to zero for lines.
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std::vector<IfcVector3> normals;
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ComputePolygonNormals(normals, false);
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bool drop = false;
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size_t inor = 0;
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std::vector<IfcVector3>::iterator vit = verts.begin();
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for (std::vector<unsigned int>::iterator it = vertcnt.begin(); it != vertcnt.end(); ++inor) {
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const unsigned int pcount = *it;
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if (normals[inor].SquareLength() < 1e-5f) {
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it = vertcnt.erase(it);
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vit = verts.erase(vit, vit + pcount);
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drop = true;
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continue;
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}
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vit += pcount;
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++it;
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}
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if(drop) {
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IFCImporter::LogDebug("removing degenerate faces");
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}
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}
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// ------------------------------------------------------------------------------------------------
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void TempMesh::ComputePolygonNormals(std::vector<IfcVector3>& normals,
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bool normalize,
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size_t ofs) const
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{
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size_t max_vcount = 0;
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std::vector<unsigned int>::const_iterator begin = vertcnt.begin()+ofs, end = vertcnt.end(), iit;
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for(iit = begin; iit != end; ++iit) {
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max_vcount = std::max(max_vcount,static_cast<size_t>(*iit));
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}
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std::vector<IfcFloat> temp((max_vcount+2)*4);
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normals.reserve( normals.size() + vertcnt.size()-ofs );
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// `NewellNormal()` currently has a relatively strange interface and need to
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// re-structure things a bit to meet them.
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size_t vidx = std::accumulate(vertcnt.begin(),begin,0);
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for(iit = begin; iit != end; vidx += *iit++) {
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if (!*iit) {
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normals.push_back(IfcVector3());
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continue;
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}
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for(size_t vofs = 0, cnt = 0; vofs < *iit; ++vofs) {
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const IfcVector3& v = verts[vidx+vofs];
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temp[cnt++] = v.x;
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temp[cnt++] = v.y;
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temp[cnt++] = v.z;
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#ifdef _DEBUG
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temp[cnt] = std::numeric_limits<IfcFloat>::quiet_NaN();
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#endif
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++cnt;
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}
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normals.push_back(IfcVector3());
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NewellNormal<4,4,4>(normals.back(),*iit,&temp[0],&temp[1],&temp[2]);
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}
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if(normalize) {
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BOOST_FOREACH(IfcVector3& n, normals) {
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n.Normalize();
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}
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}
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}
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// ------------------------------------------------------------------------------------------------
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// Compute the normal of the last polygon in the given mesh
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IfcVector3 TempMesh::ComputeLastPolygonNormal(bool normalize) const
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{
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size_t total = vertcnt.back(), vidx = verts.size() - total;
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std::vector<IfcFloat> temp((total+2)*3);
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for(size_t vofs = 0, cnt = 0; vofs < total; ++vofs) {
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const IfcVector3& v = verts[vidx+vofs];
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temp[cnt++] = v.x;
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temp[cnt++] = v.y;
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temp[cnt++] = v.z;
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}
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IfcVector3 nor;
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NewellNormal<3,3,3>(nor,total,&temp[0],&temp[1],&temp[2]);
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return normalize ? nor.Normalize() : nor;
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}
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// ------------------------------------------------------------------------------------------------
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void TempMesh::FixupFaceOrientation()
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{
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const IfcVector3 vavg = Center();
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std::vector<IfcVector3> normals;
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ComputePolygonNormals(normals);
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size_t c = 0, ofs = 0;
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BOOST_FOREACH(unsigned int cnt, vertcnt) {
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if (cnt>2){
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const IfcVector3& thisvert = verts[c];
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if (normals[ofs]*(thisvert-vavg) < 0) {
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std::reverse(verts.begin()+c,verts.begin()+cnt+c);
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}
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}
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c += cnt;
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++ofs;
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}
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}
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// ------------------------------------------------------------------------------------------------
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void TempMesh::RemoveAdjacentDuplicates()
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{
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bool drop = false;
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std::vector<IfcVector3>::iterator base = verts.begin();
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BOOST_FOREACH(unsigned int& cnt, vertcnt) {
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if (cnt < 2){
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base += cnt;
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continue;
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}
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IfcVector3 vmin,vmax;
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ArrayBounds(&*base, cnt ,vmin,vmax);
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const IfcFloat epsilon = (vmax-vmin).SquareLength() / static_cast<IfcFloat>(1e9);
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//const IfcFloat dotepsilon = 1e-9;
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//// look for vertices that lie directly on the line between their predecessor and their
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//// successor and replace them with either of them.
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//for(size_t i = 0; i < cnt; ++i) {
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// IfcVector3& v1 = *(base+i), &v0 = *(base+(i?i-1:cnt-1)), &v2 = *(base+(i+1)%cnt);
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// const IfcVector3& d0 = (v1-v0), &d1 = (v2-v1);
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// const IfcFloat l0 = d0.SquareLength(), l1 = d1.SquareLength();
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// if (!l0 || !l1) {
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// continue;
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// }
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// const IfcFloat d = (d0/sqrt(l0))*(d1/sqrt(l1));
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// if ( d >= 1.f-dotepsilon ) {
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// v1 = v0;
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// }
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// else if ( d < -1.f+dotepsilon ) {
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// v2 = v1;
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// continue;
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// }
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//}
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// drop any identical, adjacent vertices. this pass will collect the dropouts
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// of the previous pass as a side-effect.
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FuzzyVectorCompare fz(epsilon);
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std::vector<IfcVector3>::iterator end = base+cnt, e = std::unique( base, end, fz );
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if (e != end) {
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cnt -= static_cast<unsigned int>(std::distance(e, end));
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verts.erase(e,end);
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drop = true;
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}
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// check front and back vertices for this polygon
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if (cnt > 1 && fz(*base,*(base+cnt-1))) {
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verts.erase(base+ --cnt);
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drop = true;
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}
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// removing adjacent duplicates shouldn't erase everything :-)
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ai_assert(cnt>0);
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base += cnt;
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}
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if(drop) {
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IFCImporter::LogDebug("removing duplicate vertices");
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}
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}
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// ------------------------------------------------------------------------------------------------
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bool IsTrue(const EXPRESS::BOOLEAN& in)
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{
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return (std::string)in == "TRUE" || (std::string)in == "T";
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}
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// ------------------------------------------------------------------------------------------------
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IfcFloat ConvertSIPrefix(const std::string& prefix)
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{
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if (prefix == "EXA") {
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return 1e18f;
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}
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else if (prefix == "PETA") {
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return 1e15f;
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}
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else if (prefix == "TERA") {
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return 1e12f;
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}
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else if (prefix == "GIGA") {
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return 1e9f;
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}
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else if (prefix == "MEGA") {
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return 1e6f;
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}
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else if (prefix == "KILO") {
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return 1e3f;
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}
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else if (prefix == "HECTO") {
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return 1e2f;
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}
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else if (prefix == "DECA") {
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return 1e-0f;
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}
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else if (prefix == "DECI") {
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return 1e-1f;
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}
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else if (prefix == "CENTI") {
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return 1e-2f;
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}
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else if (prefix == "MILLI") {
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return 1e-3f;
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}
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else if (prefix == "MICRO") {
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return 1e-6f;
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}
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else if (prefix == "NANO") {
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return 1e-9f;
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}
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else if (prefix == "PICO") {
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return 1e-12f;
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}
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else if (prefix == "FEMTO") {
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return 1e-15f;
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}
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else if (prefix == "ATTO") {
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return 1e-18f;
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}
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else {
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IFCImporter::LogError("Unrecognized SI prefix: " + prefix);
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return 1;
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}
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertColor(aiColor4D& out, const IfcColourRgb& in)
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{
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out.r = static_cast<float>( in.Red );
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out.g = static_cast<float>( in.Green );
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out.b = static_cast<float>( in.Blue );
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out.a = static_cast<float>( 1.f );
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertColor(aiColor4D& out, const IfcColourOrFactor& in,ConversionData& conv,const aiColor4D* base)
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{
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if (const EXPRESS::REAL* const r = in.ToPtr<EXPRESS::REAL>()) {
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out.r = out.g = out.b = static_cast<float>(*r);
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if(base) {
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out.r *= static_cast<float>( base->r );
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out.g *= static_cast<float>( base->g );
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out.b *= static_cast<float>( base->b );
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out.a = static_cast<float>( base->a );
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}
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else out.a = 1.0;
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}
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else if (const IfcColourRgb* const rgb = in.ResolveSelectPtr<IfcColourRgb>(conv.db)) {
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ConvertColor(out,*rgb);
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}
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else {
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IFCImporter::LogWarn("skipping unknown IfcColourOrFactor entity");
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}
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertCartesianPoint(IfcVector3& out, const IfcCartesianPoint& in)
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{
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out = IfcVector3();
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for(size_t i = 0; i < in.Coordinates.size(); ++i) {
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out[i] = in.Coordinates[i];
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}
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertVector(IfcVector3& out, const IfcVector& in)
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{
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ConvertDirection(out,in.Orientation);
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out *= in.Magnitude;
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertDirection(IfcVector3& out, const IfcDirection& in)
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{
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out = IfcVector3();
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for(size_t i = 0; i < in.DirectionRatios.size(); ++i) {
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out[i] = in.DirectionRatios[i];
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}
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const IfcFloat len = out.Length();
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if (len<1e-6) {
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IFCImporter::LogWarn("direction vector magnitude too small, normalization would result in a division by zero");
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return;
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}
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out /= len;
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}
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// ------------------------------------------------------------------------------------------------
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void AssignMatrixAxes(IfcMatrix4& out, const IfcVector3& x, const IfcVector3& y, const IfcVector3& z)
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{
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out.a1 = x.x;
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out.b1 = x.y;
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out.c1 = x.z;
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out.a2 = y.x;
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out.b2 = y.y;
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out.c2 = y.z;
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out.a3 = z.x;
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out.b3 = z.y;
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out.c3 = z.z;
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement3D& in)
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{
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IfcVector3 loc;
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ConvertCartesianPoint(loc,in.Location);
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IfcVector3 z(0.f,0.f,1.f),r(1.f,0.f,0.f),x;
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if (in.Axis) {
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ConvertDirection(z,*in.Axis.Get());
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}
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if (in.RefDirection) {
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ConvertDirection(r,*in.RefDirection.Get());
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}
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IfcVector3 v = r.Normalize();
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IfcVector3 tmpx = z * (v*z);
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x = (v-tmpx).Normalize();
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IfcVector3 y = (z^x);
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IfcMatrix4::Translation(loc,out);
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AssignMatrixAxes(out,x,y,z);
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement2D& in)
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{
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IfcVector3 loc;
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ConvertCartesianPoint(loc,in.Location);
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IfcVector3 x(1.f,0.f,0.f);
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if (in.RefDirection) {
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ConvertDirection(x,*in.RefDirection.Get());
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}
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const IfcVector3 y = IfcVector3(x.y,-x.x,0.f);
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IfcMatrix4::Translation(loc,out);
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AssignMatrixAxes(out,x,y,IfcVector3(0.f,0.f,1.f));
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertAxisPlacement(IfcVector3& axis, IfcVector3& pos, const IfcAxis1Placement& in)
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{
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ConvertCartesianPoint(pos,in.Location);
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if (in.Axis) {
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ConvertDirection(axis,in.Axis.Get());
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}
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else {
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axis = IfcVector3(0.f,0.f,1.f);
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}
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement& in, ConversionData& conv)
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{
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if(const IfcAxis2Placement3D* pl3 = in.ResolveSelectPtr<IfcAxis2Placement3D>(conv.db)) {
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ConvertAxisPlacement(out,*pl3);
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}
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else if(const IfcAxis2Placement2D* pl2 = in.ResolveSelectPtr<IfcAxis2Placement2D>(conv.db)) {
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ConvertAxisPlacement(out,*pl2);
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}
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else {
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IFCImporter::LogWarn("skipping unknown IfcAxis2Placement entity");
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}
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}
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// ------------------------------------------------------------------------------------------------
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void ConvertTransformOperator(IfcMatrix4& out, const IfcCartesianTransformationOperator& op)
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{
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IfcVector3 loc;
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ConvertCartesianPoint(loc,op.LocalOrigin);
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IfcVector3 x(1.f,0.f,0.f),y(0.f,1.f,0.f),z(0.f,0.f,1.f);
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if (op.Axis1) {
|
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ConvertDirection(x,*op.Axis1.Get());
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|
}
|
|
if (op.Axis2) {
|
|
ConvertDirection(y,*op.Axis2.Get());
|
|
}
|
|
if (const IfcCartesianTransformationOperator3D* op2 = op.ToPtr<IfcCartesianTransformationOperator3D>()) {
|
|
if(op2->Axis3) {
|
|
ConvertDirection(z,*op2->Axis3.Get());
|
|
}
|
|
}
|
|
|
|
IfcMatrix4 locm;
|
|
IfcMatrix4::Translation(loc,locm);
|
|
AssignMatrixAxes(out,x,y,z);
|
|
|
|
|
|
IfcVector3 vscale;
|
|
if (const IfcCartesianTransformationOperator3DnonUniform* nuni = op.ToPtr<IfcCartesianTransformationOperator3DnonUniform>()) {
|
|
vscale.x = nuni->Scale?op.Scale.Get():1.f;
|
|
vscale.y = nuni->Scale2?nuni->Scale2.Get():1.f;
|
|
vscale.z = nuni->Scale3?nuni->Scale3.Get():1.f;
|
|
}
|
|
else {
|
|
const IfcFloat sc = op.Scale?op.Scale.Get():1.f;
|
|
vscale = IfcVector3(sc,sc,sc);
|
|
}
|
|
|
|
IfcMatrix4 s;
|
|
IfcMatrix4::Scaling(vscale,s);
|
|
|
|
out = locm * out * s;
|
|
}
|
|
|
|
} // ! IFC
|
|
} // ! Assimp
|
|
|
|
#endif
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