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This commit is contained in:
Thomas Krijnen
2023-03-21 20:15:01 +01:00
parent cfb0eda067
commit c78b2893de
194 changed files with 105325 additions and 7785 deletions
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src/ifcgeom/IfcGeomRepresentation.cpp
+77 -222
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@@ -26,40 +26,45 @@
#include <TopoDS_Compound.hxx>
#include <BRepGProp.hxx>
#include <GProp_GProps.hxx>
#include <TopoDS.hxx>
#include "../ifcparse/IfcLogger.h"
#include "../ifcgeom_schema_agnostic/Kernel.h"
#include "../ifcgeom_schema_agnostic/base_utils.h"
#include "../ifcgeom/kernels/opencascade/OpenCascadeConversionResult.h"
#include "../ifcgeom/kernels/opencascade/base_utils.h"
IfcGeom::Representation::Serialization::Serialization(const BRep& brep)
: Representation(brep.settings())
, id_(brep.id())
{
TopoDS_Compound compound = brep.as_compound();
for (IfcGeom::IfcRepresentationShapeItems::const_iterator it = brep.begin(); it != brep.end(); ++ it) {
int sid = -1;
if (it->hasStyle() && it->Style().Diffuse()) {
const IfcGeom::SurfaceStyle::ColorComponent& clr = *it->Style().Diffuse();
surface_styles_.push_back(clr.R());
surface_styles_.push_back(clr.G());
surface_styles_.push_back(clr.B());
ConversionResultShape* shape = brep.as_compound();
TopoDS_Compound compound = TopoDS::Compound(((ifcopenshell::geometry::OpenCascadeShape*)shape)->shape());
delete shape;
sid = it->Style().Id().get_value_or(-1);
for (auto it = brep.begin(); it != brep.end(); ++it) {
int sid = -1;
if (it->hasStyle()) {
const auto& clr = it->Style().diffuse.ccomponents();
surface_styles_.push_back(clr(0));
surface_styles_.push_back(clr(1));
surface_styles_.push_back(clr(2));
sid = it->Style().instance ? it->Style().instance->data().id() : -1;
} else {
surface_styles_.push_back(-1.);
surface_styles_.push_back(-1.);
surface_styles_.push_back(-1.);
}
if (it->hasStyle() && it->Style().Transparency()) {
surface_styles_.push_back(1. - *it->Style().Transparency());
if (it->hasStyle() && it->Style().has_transparency()) {
surface_styles_.push_back(1. - it->Style().transparency);
} else {
surface_styles_.push_back(1.);
}
surface_style_ids_.push_back(sid);
}
std::stringstream sstream;
BRepTools::Write(compound,sstream);
brep_data_ = sstream.str();
@@ -90,13 +95,26 @@ TopoDS_Shape apply_transformation(const TopoDS_Shape& s, const gp_GTrsf& t) {
}
}
TopoDS_Compound IfcGeom::Representation::BRep::as_compound(bool force_meters) const {
IfcGeom::ConversionResultShape* IfcGeom::Representation::BRep::as_compound(bool force_meters) const {
TopoDS_Compound compound;
BRep_Builder builder;
builder.MakeCompound(compound);
for (IfcGeom::IfcRepresentationShapeItems::const_iterator it = begin(); it != end(); ++it) {
const TopoDS_Shape& s = it->Shape();
gp_GTrsf trsf = it->Placement();
for (auto it = begin(); it != end(); ++it) {
const TopoDS_Shape& s = *(ifcopenshell::geometry::OpenCascadeShape*)it->Shape();
// @todo, check
gp_GTrsf trsf;
if (it->Placement().components_) {
gp_Trsf tr;
const auto& m = it->Placement().ccomponents();
tr.SetValues(
m(0, 0), m(0, 1), m(0, 2), m(0, 3),
m(1, 0), m(1, 1), m(1, 2), m(1, 3),
m(2, 0), m(2, 1), m(2, 2), m(2, 3)
);
trsf = tr;
}
if (!force_meters && settings().get(IteratorSettings::CONVERT_BACK_UNITS)) {
gp_Trsf scale;
@@ -107,9 +125,11 @@ TopoDS_Compound IfcGeom::Representation::BRep::as_compound(bool force_meters) co
const TopoDS_Shape moved_shape = apply_transformation(s, trsf);
builder.Add(compound, moved_shape);
}
return compound;
return new ifcopenshell::geometry::OpenCascadeShape(compound);
}
namespace {
void accumulate(const gp_Ax3& ax, const gp_Dir& normal, double area, double& along_x, double& along_y, double& along_z) {
along_x += area * fabs(ax.XDirection().Dot(normal));
@@ -173,7 +193,7 @@ namespace {
const gp_Vec v2 = pt3 - pt2;
const gp_Vec v3 = pt1 - pt3;
const gp_Vec normal_vector = v1 ^ v2;
if (normal_vector.Magnitude() > ALMOST_ZERO) {
if (normal_vector.Magnitude() > 1.e-7) {
gp_Dir normal = gp_Dir();
double edge_lengths[3] = { v1.Magnitude(), v2.Magnitude(), v3.Magnitude() };
@@ -197,9 +217,9 @@ bool IfcGeom::Representation::BRep::calculate_surface_area(double& area) const {
try {
area = 0.;
for (IfcGeom::IfcRepresentationShapeItems::const_iterator it = begin(); it != end(); ++it) {
for (IfcGeom::ConversionResults::const_iterator it = begin(); it != end(); ++it) {
GProp_GProps prop;
BRepGProp::SurfaceProperties(it->Shape(), prop);
BRepGProp::SurfaceProperties(*(ifcopenshell::geometry::OpenCascadeShape*)it->Shape(), prop);
area += prop.Mass();
}
@@ -214,10 +234,10 @@ bool IfcGeom::Representation::BRep::calculate_volume(double& volume) const {
try {
volume = 0.;
for (IfcGeom::IfcRepresentationShapeItems::const_iterator it = begin(); it != end(); ++it) {
if (util::is_manifold(it->Shape())) {
for (IfcGeom::ConversionResults::const_iterator it = begin(); it != end(); ++it) {
if (util::is_manifold(*(ifcopenshell::geometry::OpenCascadeShape*)it->Shape())) {
GProp_GProps prop;
BRepGProp::VolumeProperties(it->Shape(), prop);
BRepGProp::VolumeProperties(*(ifcopenshell::geometry::OpenCascadeShape*)it->Shape(), prop);
volume += prop.Mass();
} else {
return false;
@@ -231,15 +251,31 @@ bool IfcGeom::Representation::BRep::calculate_volume(double& volume) const {
}
}
bool IfcGeom::Representation::BRep::calculate_projected_surface_area(const gp_Ax3 & ax, double & along_x, double & along_y, double & along_z) const {
bool IfcGeom::Representation::BRep::calculate_projected_surface_area(const ifcopenshell::geometry::taxonomy::matrix4& place, double & along_x, double & along_y, double & along_z) const {
try {
gp_GTrsf trsf;
if (place.components_) {
gp_Trsf tr;
const auto& m = place.ccomponents();
tr.SetValues(
m(0, 0), m(0, 1), m(0, 2), m(0, 3),
m(1, 0), m(1, 1), m(1, 2), m(1, 3),
m(2, 0), m(2, 1), m(2, 2), m(2, 3)
);
trsf = tr;
}
gp_Mat mat = trsf.Trsf().HVectorialPart();
gp_Ax3 ax(trsf.TranslationPart(), mat.Column(3), mat.Column(1));
along_x = along_y = along_z = 0.;
for (IfcGeom::IfcRepresentationShapeItems::const_iterator it = begin(); it != end(); ++it) {
for (IfcGeom::ConversionResults::const_iterator it = begin(); it != end(); ++it) {
double x, y, z;
surface_area_along_direction(settings().deflection_tolerance(), it->Shape(), ax, x, y, z);
surface_area_along_direction(settings().deflection_tolerance(), *(ifcopenshell::geometry::OpenCascadeShape*)it->Shape(), ax, x, y, z);
if (util::is_manifold(it->Shape())) {
if (util::is_manifold(*(ifcopenshell::geometry::OpenCascadeShape*)it->Shape())) {
x /= 2.;
y /= 2.;
z /= 2.;
@@ -262,27 +298,25 @@ IfcGeom::Representation::Triangulation::Triangulation(const BRep& shape_model)
, id_(shape_model.id())
, weld_offset_(0)
{
for (IfcGeom::IfcRepresentationShapeItems::const_iterator iit = shape_model.begin(); iit != shape_model.end(); ++iit) {
for (IfcGeom::ConversionResults::const_iterator iit = shape_model.begin(); iit != shape_model.end(); ++iit) {
// Don't weld vertices that belong to different items to prevent non-manifold situations.
weld_offset_ += welds.size();
welds.clear();
resetWelds();
int surface_style_id = -1;
if (iit->hasStyle()) {
Material adapter(iit->StylePtr());
std::vector<Material>::const_iterator jt = std::find(_materials.begin(), _materials.end(), adapter);
auto jt = std::find(_materials.begin(), _materials.end(), iit->Style());
if (jt == _materials.end()) {
surface_style_id = (int)_materials.size();
_materials.push_back(adapter);
_materials.push_back(iit->Style());
} else {
surface_style_id = (int)(jt - _materials.begin());
}
}
if (settings().get(IteratorSettings::APPLY_DEFAULT_MATERIALS) && surface_style_id == -1) {
Material material(IfcGeom::get_default_style(settings().element_type()));
std::vector<Material>::const_iterator mit = std::find(_materials.begin(), _materials.end(), material);
const auto& material = IfcGeom::get_default_style(settings().element_type());
auto mit = std::find(_materials.begin(), _materials.end(), material);
if (mit == _materials.end()) {
surface_style_id = (int)_materials.size();
_materials.push_back(material);
@@ -291,186 +325,7 @@ IfcGeom::Representation::Triangulation::Triangulation(const BRep& shape_model)
}
}
const TopoDS_Shape& s = iit->Shape();
const gp_GTrsf& trsf = iit->Placement();
// Triangulate the shape
try {
BRepMesh_IncrementalMesh(s, settings().deflection_tolerance(), false, settings().angular_tolerance());
} catch (...) {
Logger::Message(Logger::LOG_ERROR, "Failed to triangulate shape");
continue;
}
// Iterates over the faces of the shape
int num_faces = 0;
TopExp_Explorer exp;
for (exp.Init(s, TopAbs_FACE); exp.More(); exp.Next(), ++num_faces) {
TopoDS_Face face = TopoDS::Face(exp.Current());
TopLoc_Location loc;
Handle_Poly_Triangulation tri = BRep_Tool::Triangulation(face, loc);
if (tri.IsNull()) {
Logger::Message(Logger::LOG_ERROR, "Triangulation missing for face");
} else {
// A 3x3 matrix to rotate the vertex normals
const gp_Mat rotation_matrix = trsf.VectorialPart();
// Keep track of the number of times an edge is used
// Manifold edges (i.e. edges used twice) are deemed invisible
std::map<std::pair<int, int>, int> edgecount;
std::vector<std::pair<int, int> > edges_temp;
std::vector<gp_XYZ> coords;
BRepGProp_Face prop(face);
std::map<int, int> dict;
// Vertex normals are only calculated if vertices are not welded and calculation is not disable explicitly.
const bool calculate_normals = !settings().get(IteratorSettings::WELD_VERTICES) &&
!settings().get(IteratorSettings::NO_NORMALS);
for (int i = 1; i <= tri->NbNodes(); ++i) {
coords.push_back(tri->Node(i).Transformed(loc).XYZ());
trsf.Transforms(*coords.rbegin());
dict[i] = addVertex(surface_style_id, *coords.rbegin());
if (calculate_normals) {
const gp_Pnt2d& uv = tri->UVNode(i);
gp_Pnt p;
gp_Vec normal_direction;
prop.Normal(uv.X(), uv.Y(), p, normal_direction);
gp_Vec normal(0., 0., 0.);
if (normal_direction.Magnitude() > 1.e-9) {
normal = gp_Dir(normal_direction.XYZ() * rotation_matrix);
} else {
Handle_Geom_Surface surf = BRep_Tool::Surface(face);
// Special case the normal at the poles of a spherical surface
if (surf->DynamicType() == STANDARD_TYPE(Geom_SphericalSurface)) {
if (fabs(fabs(uv.Y()) - M_PI / 2.) < 1.e-9) {
const bool is_top = uv.Y() > 0;
const bool is_forward = face.Orientation() == TopAbs_FORWARD;
const double z = (is_top == is_forward) ? 1. : -1.;
normal = gp_Dir(gp_XYZ(0, 0, z) * rotation_matrix);
}
}
// TODO: Do the same for conical surfaces, but they are rare in IFC.
}
_normals.push_back(normal.X());
_normals.push_back(normal.Y());
_normals.push_back(normal.Z());
}
}
const Poly_Array1OfTriangle& triangles = tri->Triangles();
for (int i = 1; i <= triangles.Length(); ++i) {
int n1, n2, n3;
if (face.Orientation() == TopAbs_REVERSED)
triangles(i).Get(n3, n2, n1);
else triangles(i).Get(n1, n2, n3);
/* An alternative would be to calculate normals based
* on the coordinates of the mesh vertices */
/*
const gp_XYZ pt1 = coords[n1-1];
const gp_XYZ pt2 = coords[n2-1];
const gp_XYZ pt3 = coords[n3-1];
const gp_XYZ v1 = pt2-pt1;
const gp_XYZ v2 = pt3-pt2;
gp_Dir normal = gp_Dir(v1^v2);
_normals.push_back((float)normal.X());
_normals.push_back((float)normal.Y());
_normals.push_back((float)normal.Z());
*/
_faces.push_back(dict[n1]);
_faces.push_back(dict[n2]);
_faces.push_back(dict[n3]);
_material_ids.push_back(surface_style_id);
addEdge(dict[n1], dict[n2], edgecount, edges_temp);
addEdge(dict[n2], dict[n3], edgecount, edges_temp);
addEdge(dict[n3], dict[n1], edgecount, edges_temp);
}
for (std::vector<std::pair<int, int> >::const_iterator jt = edges_temp.begin(); jt != edges_temp.end(); ++jt) {
if (edgecount[*jt] == 1) {
// non manifold edge, face boundary
_edges.push_back(jt->first);
_edges.push_back(jt->second);
}
}
}
}
if (!_normals.empty() && settings().get(IfcGeom::IteratorSettings::GENERATE_UVS)) {
uvs_ = box_project_uvs(_verts, _normals);
}
if (num_faces == 0) {
// Edges are only emitted if there are no faces. A mixed representation of faces
// and loose edges is discouraged by the standard. An alternative would be to use
// TopExp_Explorer texp(s, TopAbs_EDGE, TopAbs_FACE) to find edges that do not
// belong to any face.
for (TopExp_Explorer texp(s, TopAbs_EDGE); texp.More(); texp.Next()) {
BRepAdaptor_Curve crv(TopoDS::Edge(texp.Current()));
GCPnts_QuasiUniformDeflection tessellater(crv, settings().deflection_tolerance());
int n = tessellater.NbPoints();
int previous = -1;
for (int i = 1; i <= n; ++i) {
gp_XYZ p = tessellater.Value(i).XYZ();
int current = addVertex(surface_style_id, p);
std::vector<std::pair<int, int>> segments;
if (i > 1) {
segments.push_back(std::make_pair(previous, current));
}
if (settings().get(IfcGeom::IteratorSettings::EDGE_ARROWS)) {
// In case you want direction arrows on your edges
double u = tessellater.Parameter(i);
gp_XYZ p2, p3;
gp_Pnt tmp;
gp_Vec tmp2;
crv.D1(u, tmp, tmp2);
gp_Dir d1, d2, d3, d4;
d1 = tmp2;
if (texp.Current().Orientation() == TopAbs_REVERSED) {
d1 = -d1;
}
if (fabs(d1.Z()) < 0.5) {
d2 = d1.Crossed(gp::DZ());
} else {
d2 = d1.Crossed(gp::DY());
}
d3 = d1.XYZ() + d2.XYZ();
d4 = d1.XYZ() - d2.XYZ();
p2 = p - d3.XYZ() / 10.;
p3 = p - d4.XYZ() / 10.;
trsf.Transforms(p2);
trsf.Transforms(p3);
trsf.Transforms(p);
int left = addVertex(surface_style_id, p2);
int right = addVertex(surface_style_id, p3);
segments.push_back(std::make_pair(left, current));
segments.push_back(std::make_pair(right, current));
}
for (auto& sgmt : segments) {
_edges.push_back(sgmt.first);
_edges.push_back(sgmt.second);
_material_ids.push_back(surface_style_id);
}
previous = current;
}
}
}
BRepTools::Clean(s);
iit->Shape()->Triangulate(settings(), iit->Placement(), this, surface_style_id);
}
}
@@ -505,11 +360,11 @@ std::vector<double> IfcGeom::Representation::Triangulation::box_project_uvs(cons
return uvs;
}
int IfcGeom::Representation::Triangulation::addVertex(int material_index, const gp_XYZ & p) {
int IfcGeom::Representation::Triangulation::addVertex(int material_index, double pX, double pY, double pZ) {
const bool convert = settings().get(IteratorSettings::CONVERT_BACK_UNITS);
const double X = convert ? (p.X() / settings().unit_magnitude()) : p.X();
const double Y = convert ? (p.Y() / settings().unit_magnitude()) : p.Y();
const double Z = convert ? (p.Z() / settings().unit_magnitude()) : p.Z();
const double X = convert ? (pX / settings().unit_magnitude()) : pX;
const double Y = convert ? (pY / settings().unit_magnitude()) : pY;
const double Z = convert ? (pZ / settings().unit_magnitude()) : pZ;
int i = (int)_verts.size() / 3;
if (settings().get(IteratorSettings::WELD_VERTICES)) {
const VertexKey key = std::make_pair(material_index, std::make_pair(X, std::make_pair(Y, Z)));