578 lines
16 KiB
C++
578 lines
16 KiB
C++
/*
|
|
Open Asset Import Library (assimp)
|
|
----------------------------------------------------------------------
|
|
|
|
Copyright (c) 2006-2012, 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 IFCUtil.cpp
|
|
* @brief Implementation of conversion routines for some common Ifc helper entities.
|
|
*/
|
|
|
|
#include "AssimpPCH.h"
|
|
|
|
#ifndef ASSIMP_BUILD_NO_IFC_IMPORTER
|
|
|
|
#include "IFCUtil.h"
|
|
#include "PolyTools.h"
|
|
#include "ProcessHelper.h"
|
|
|
|
namespace Assimp {
|
|
namespace IFC {
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempOpening::Transform(const IfcMatrix4& mat)
|
|
{
|
|
if(profileMesh) {
|
|
profileMesh->Transform(mat);
|
|
}
|
|
if(profileMesh2D) {
|
|
profileMesh2D->Transform(mat);
|
|
}
|
|
extrusionDir *= IfcMatrix3(mat);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
aiMesh* TempMesh::ToMesh()
|
|
{
|
|
ai_assert(verts.size() == std::accumulate(vertcnt.begin(),vertcnt.end(),size_t(0)));
|
|
|
|
if (verts.empty()) {
|
|
return NULL;
|
|
}
|
|
|
|
std::auto_ptr<aiMesh> mesh(new aiMesh());
|
|
|
|
// copy vertices
|
|
mesh->mNumVertices = static_cast<unsigned int>(verts.size());
|
|
mesh->mVertices = new aiVector3D[mesh->mNumVertices];
|
|
std::copy(verts.begin(),verts.end(),mesh->mVertices);
|
|
|
|
// and build up faces
|
|
mesh->mNumFaces = static_cast<unsigned int>(vertcnt.size());
|
|
mesh->mFaces = new aiFace[mesh->mNumFaces];
|
|
|
|
for(unsigned int i = 0,n=0, acc = 0; i < mesh->mNumFaces; ++n) {
|
|
aiFace& f = mesh->mFaces[i];
|
|
if (!vertcnt[n]) {
|
|
--mesh->mNumFaces;
|
|
continue;
|
|
}
|
|
|
|
f.mNumIndices = vertcnt[n];
|
|
f.mIndices = new unsigned int[f.mNumIndices];
|
|
for(unsigned int a = 0; a < f.mNumIndices; ++a) {
|
|
f.mIndices[a] = acc++;
|
|
}
|
|
|
|
++i;
|
|
}
|
|
|
|
return mesh.release();
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::Clear()
|
|
{
|
|
verts.clear();
|
|
vertcnt.clear();
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::Transform(const IfcMatrix4& mat)
|
|
{
|
|
BOOST_FOREACH(IfcVector3& v, verts) {
|
|
v *= mat;
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------
|
|
IfcVector3 TempMesh::Center() const
|
|
{
|
|
return std::accumulate(verts.begin(),verts.end(),IfcVector3()) / static_cast<IfcFloat>(verts.size());
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::Append(const TempMesh& other)
|
|
{
|
|
verts.insert(verts.end(),other.verts.begin(),other.verts.end());
|
|
vertcnt.insert(vertcnt.end(),other.vertcnt.begin(),other.vertcnt.end());
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::RemoveDegenerates()
|
|
{
|
|
// The strategy is simple: walk the mesh and compute normals using
|
|
// Newell's algorithm. The length of the normals gives the area
|
|
// of the polygons, which is close to zero for lines.
|
|
|
|
std::vector<IfcVector3> normals;
|
|
ComputePolygonNormals(normals, false);
|
|
|
|
bool drop = false;
|
|
size_t inor = 0;
|
|
|
|
std::vector<IfcVector3>::iterator vit = verts.begin();
|
|
for (std::vector<unsigned int>::iterator it = vertcnt.begin(); it != vertcnt.end(); ++inor) {
|
|
const unsigned int pcount = *it;
|
|
|
|
if (normals[inor].SquareLength() < 1e-5f) {
|
|
it = vertcnt.erase(it);
|
|
vit = verts.erase(vit, vit + pcount);
|
|
|
|
drop = true;
|
|
continue;
|
|
}
|
|
|
|
vit += pcount;
|
|
++it;
|
|
}
|
|
|
|
if(drop) {
|
|
IFCImporter::LogDebug("removing degenerate faces");
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::ComputePolygonNormals(std::vector<IfcVector3>& normals,
|
|
bool normalize,
|
|
size_t ofs) const
|
|
{
|
|
size_t max_vcount = 0;
|
|
std::vector<unsigned int>::const_iterator begin = vertcnt.begin()+ofs, end = vertcnt.end(), iit;
|
|
for(iit = begin; iit != end; ++iit) {
|
|
max_vcount = std::max(max_vcount,static_cast<size_t>(*iit));
|
|
}
|
|
|
|
std::vector<IfcFloat> temp((max_vcount+2)*4);
|
|
normals.reserve( normals.size() + vertcnt.size()-ofs );
|
|
|
|
// `NewellNormal()` currently has a relatively strange interface and need to
|
|
// re-structure things a bit to meet them.
|
|
size_t vidx = std::accumulate(vertcnt.begin(),begin,0);
|
|
for(iit = begin; iit != end; vidx += *iit++) {
|
|
if (!*iit) {
|
|
normals.push_back(IfcVector3());
|
|
continue;
|
|
}
|
|
for(size_t vofs = 0, cnt = 0; vofs < *iit; ++vofs) {
|
|
const IfcVector3& v = verts[vidx+vofs];
|
|
temp[cnt++] = v.x;
|
|
temp[cnt++] = v.y;
|
|
temp[cnt++] = v.z;
|
|
#ifdef ASSIMP_BUILD_DEBUG
|
|
temp[cnt] = std::numeric_limits<IfcFloat>::quiet_NaN();
|
|
#endif
|
|
++cnt;
|
|
}
|
|
|
|
normals.push_back(IfcVector3());
|
|
NewellNormal<4,4,4>(normals.back(),*iit,&temp[0],&temp[1],&temp[2]);
|
|
}
|
|
|
|
if(normalize) {
|
|
BOOST_FOREACH(IfcVector3& n, normals) {
|
|
n.Normalize();
|
|
}
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
// Compute the normal of the last polygon in the given mesh
|
|
IfcVector3 TempMesh::ComputeLastPolygonNormal(bool normalize) const
|
|
{
|
|
size_t total = vertcnt.back(), vidx = verts.size() - total;
|
|
std::vector<IfcFloat> temp((total+2)*3);
|
|
for(size_t vofs = 0, cnt = 0; vofs < total; ++vofs) {
|
|
const IfcVector3& v = verts[vidx+vofs];
|
|
temp[cnt++] = v.x;
|
|
temp[cnt++] = v.y;
|
|
temp[cnt++] = v.z;
|
|
}
|
|
IfcVector3 nor;
|
|
NewellNormal<3,3,3>(nor,total,&temp[0],&temp[1],&temp[2]);
|
|
return normalize ? nor.Normalize() : nor;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::FixupFaceOrientation()
|
|
{
|
|
const IfcVector3 vavg = Center();
|
|
|
|
std::vector<IfcVector3> normals;
|
|
ComputePolygonNormals(normals);
|
|
|
|
size_t c = 0, ofs = 0;
|
|
BOOST_FOREACH(unsigned int cnt, vertcnt) {
|
|
if (cnt>2){
|
|
const IfcVector3& thisvert = verts[c];
|
|
if (normals[ofs]*(thisvert-vavg) < 0) {
|
|
std::reverse(verts.begin()+c,verts.begin()+cnt+c);
|
|
}
|
|
}
|
|
c += cnt;
|
|
++ofs;
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::RemoveAdjacentDuplicates()
|
|
{
|
|
|
|
bool drop = false;
|
|
std::vector<IfcVector3>::iterator base = verts.begin();
|
|
BOOST_FOREACH(unsigned int& cnt, vertcnt) {
|
|
if (cnt < 2){
|
|
base += cnt;
|
|
continue;
|
|
}
|
|
|
|
IfcVector3 vmin,vmax;
|
|
ArrayBounds(&*base, cnt ,vmin,vmax);
|
|
|
|
|
|
const IfcFloat epsilon = (vmax-vmin).SquareLength() / static_cast<IfcFloat>(1e9);
|
|
//const IfcFloat dotepsilon = 1e-9;
|
|
|
|
//// look for vertices that lie directly on the line between their predecessor and their
|
|
//// successor and replace them with either of them.
|
|
|
|
//for(size_t i = 0; i < cnt; ++i) {
|
|
// IfcVector3& v1 = *(base+i), &v0 = *(base+(i?i-1:cnt-1)), &v2 = *(base+(i+1)%cnt);
|
|
// const IfcVector3& d0 = (v1-v0), &d1 = (v2-v1);
|
|
// const IfcFloat l0 = d0.SquareLength(), l1 = d1.SquareLength();
|
|
// if (!l0 || !l1) {
|
|
// continue;
|
|
// }
|
|
|
|
// const IfcFloat d = (d0/sqrt(l0))*(d1/sqrt(l1));
|
|
|
|
// if ( d >= 1.f-dotepsilon ) {
|
|
// v1 = v0;
|
|
// }
|
|
// else if ( d < -1.f+dotepsilon ) {
|
|
// v2 = v1;
|
|
// continue;
|
|
// }
|
|
//}
|
|
|
|
// drop any identical, adjacent vertices. this pass will collect the dropouts
|
|
// of the previous pass as a side-effect.
|
|
FuzzyVectorCompare fz(epsilon);
|
|
std::vector<IfcVector3>::iterator end = base+cnt, e = std::unique( base, end, fz );
|
|
if (e != end) {
|
|
cnt -= static_cast<unsigned int>(std::distance(e, end));
|
|
verts.erase(e,end);
|
|
drop = true;
|
|
}
|
|
|
|
// check front and back vertices for this polygon
|
|
if (cnt > 1 && fz(*base,*(base+cnt-1))) {
|
|
verts.erase(base+ --cnt);
|
|
drop = true;
|
|
}
|
|
|
|
// removing adjacent duplicates shouldn't erase everything :-)
|
|
ai_assert(cnt>0);
|
|
base += cnt;
|
|
}
|
|
if(drop) {
|
|
IFCImporter::LogDebug("removing duplicate vertices");
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void TempMesh::Swap(TempMesh& other)
|
|
{
|
|
vertcnt.swap(other.vertcnt);
|
|
verts.swap(other.verts);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
bool IsTrue(const EXPRESS::BOOLEAN& in)
|
|
{
|
|
return (std::string)in == "TRUE" || (std::string)in == "T";
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
IfcFloat ConvertSIPrefix(const std::string& prefix)
|
|
{
|
|
if (prefix == "EXA") {
|
|
return 1e18f;
|
|
}
|
|
else if (prefix == "PETA") {
|
|
return 1e15f;
|
|
}
|
|
else if (prefix == "TERA") {
|
|
return 1e12f;
|
|
}
|
|
else if (prefix == "GIGA") {
|
|
return 1e9f;
|
|
}
|
|
else if (prefix == "MEGA") {
|
|
return 1e6f;
|
|
}
|
|
else if (prefix == "KILO") {
|
|
return 1e3f;
|
|
}
|
|
else if (prefix == "HECTO") {
|
|
return 1e2f;
|
|
}
|
|
else if (prefix == "DECA") {
|
|
return 1e-0f;
|
|
}
|
|
else if (prefix == "DECI") {
|
|
return 1e-1f;
|
|
}
|
|
else if (prefix == "CENTI") {
|
|
return 1e-2f;
|
|
}
|
|
else if (prefix == "MILLI") {
|
|
return 1e-3f;
|
|
}
|
|
else if (prefix == "MICRO") {
|
|
return 1e-6f;
|
|
}
|
|
else if (prefix == "NANO") {
|
|
return 1e-9f;
|
|
}
|
|
else if (prefix == "PICO") {
|
|
return 1e-12f;
|
|
}
|
|
else if (prefix == "FEMTO") {
|
|
return 1e-15f;
|
|
}
|
|
else if (prefix == "ATTO") {
|
|
return 1e-18f;
|
|
}
|
|
else {
|
|
IFCImporter::LogError("Unrecognized SI prefix: " + prefix);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertColor(aiColor4D& out, const IfcColourRgb& in)
|
|
{
|
|
out.r = static_cast<float>( in.Red );
|
|
out.g = static_cast<float>( in.Green );
|
|
out.b = static_cast<float>( in.Blue );
|
|
out.a = static_cast<float>( 1.f );
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertColor(aiColor4D& out, const IfcColourOrFactor& in,ConversionData& conv,const aiColor4D* base)
|
|
{
|
|
if (const EXPRESS::REAL* const r = in.ToPtr<EXPRESS::REAL>()) {
|
|
out.r = out.g = out.b = static_cast<float>(*r);
|
|
if(base) {
|
|
out.r *= static_cast<float>( base->r );
|
|
out.g *= static_cast<float>( base->g );
|
|
out.b *= static_cast<float>( base->b );
|
|
out.a = static_cast<float>( base->a );
|
|
}
|
|
else out.a = 1.0;
|
|
}
|
|
else if (const IfcColourRgb* const rgb = in.ResolveSelectPtr<IfcColourRgb>(conv.db)) {
|
|
ConvertColor(out,*rgb);
|
|
}
|
|
else {
|
|
IFCImporter::LogWarn("skipping unknown IfcColourOrFactor entity");
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertCartesianPoint(IfcVector3& out, const IfcCartesianPoint& in)
|
|
{
|
|
out = IfcVector3();
|
|
for(size_t i = 0; i < in.Coordinates.size(); ++i) {
|
|
out[i] = in.Coordinates[i];
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertVector(IfcVector3& out, const IfcVector& in)
|
|
{
|
|
ConvertDirection(out,in.Orientation);
|
|
out *= in.Magnitude;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertDirection(IfcVector3& out, const IfcDirection& in)
|
|
{
|
|
out = IfcVector3();
|
|
for(size_t i = 0; i < in.DirectionRatios.size(); ++i) {
|
|
out[i] = in.DirectionRatios[i];
|
|
}
|
|
const IfcFloat len = out.Length();
|
|
if (len<1e-6) {
|
|
IFCImporter::LogWarn("direction vector magnitude too small, normalization would result in a division by zero");
|
|
return;
|
|
}
|
|
out /= len;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void AssignMatrixAxes(IfcMatrix4& out, const IfcVector3& x, const IfcVector3& y, const IfcVector3& z)
|
|
{
|
|
out.a1 = x.x;
|
|
out.b1 = x.y;
|
|
out.c1 = x.z;
|
|
|
|
out.a2 = y.x;
|
|
out.b2 = y.y;
|
|
out.c2 = y.z;
|
|
|
|
out.a3 = z.x;
|
|
out.b3 = z.y;
|
|
out.c3 = z.z;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement3D& in)
|
|
{
|
|
IfcVector3 loc;
|
|
ConvertCartesianPoint(loc,in.Location);
|
|
|
|
IfcVector3 z(0.f,0.f,1.f),r(1.f,0.f,0.f),x;
|
|
|
|
if (in.Axis) {
|
|
ConvertDirection(z,*in.Axis.Get());
|
|
}
|
|
if (in.RefDirection) {
|
|
ConvertDirection(r,*in.RefDirection.Get());
|
|
}
|
|
|
|
IfcVector3 v = r.Normalize();
|
|
IfcVector3 tmpx = z * (v*z);
|
|
|
|
x = (v-tmpx).Normalize();
|
|
IfcVector3 y = (z^x);
|
|
|
|
IfcMatrix4::Translation(loc,out);
|
|
AssignMatrixAxes(out,x,y,z);
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement2D& in)
|
|
{
|
|
IfcVector3 loc;
|
|
ConvertCartesianPoint(loc,in.Location);
|
|
|
|
IfcVector3 x(1.f,0.f,0.f);
|
|
if (in.RefDirection) {
|
|
ConvertDirection(x,*in.RefDirection.Get());
|
|
}
|
|
|
|
const IfcVector3 y = IfcVector3(x.y,-x.x,0.f);
|
|
|
|
IfcMatrix4::Translation(loc,out);
|
|
AssignMatrixAxes(out,x,y,IfcVector3(0.f,0.f,1.f));
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertAxisPlacement(IfcVector3& axis, IfcVector3& pos, const IfcAxis1Placement& in)
|
|
{
|
|
ConvertCartesianPoint(pos,in.Location);
|
|
if (in.Axis) {
|
|
ConvertDirection(axis,in.Axis.Get());
|
|
}
|
|
else {
|
|
axis = IfcVector3(0.f,0.f,1.f);
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertAxisPlacement(IfcMatrix4& out, const IfcAxis2Placement& in, ConversionData& conv)
|
|
{
|
|
if(const IfcAxis2Placement3D* pl3 = in.ResolveSelectPtr<IfcAxis2Placement3D>(conv.db)) {
|
|
ConvertAxisPlacement(out,*pl3);
|
|
}
|
|
else if(const IfcAxis2Placement2D* pl2 = in.ResolveSelectPtr<IfcAxis2Placement2D>(conv.db)) {
|
|
ConvertAxisPlacement(out,*pl2);
|
|
}
|
|
else {
|
|
IFCImporter::LogWarn("skipping unknown IfcAxis2Placement entity");
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------
|
|
void ConvertTransformOperator(IfcMatrix4& out, const IfcCartesianTransformationOperator& op)
|
|
{
|
|
IfcVector3 loc;
|
|
ConvertCartesianPoint(loc,op.LocalOrigin);
|
|
|
|
IfcVector3 x(1.f,0.f,0.f),y(0.f,1.f,0.f),z(0.f,0.f,1.f);
|
|
if (op.Axis1) {
|
|
ConvertDirection(x,*op.Axis1.Get());
|
|
}
|
|
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
|