Glassvision/IfcOpenShell
1
0
Fork 0
mirror of https://github.com/IfcOpenShell/IfcOpenShell.git synced 2026-09-19 14:41:25 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
95e6c14f396ae9310b5b2b88e501a6edc423163d
IfcOpenShell/src/ifcgeom/IfcGeomRepresentation.h
T

221 lines
8.9 KiB
C++
Raw Blame History

/********************************************************************************
* *
* This file is part of IfcOpenShell. *
* *
* IfcOpenShell is free software: you can redistribute it and/or modify *
* it under the terms of the Lesser GNU General Public License as published by *
* the Free Software Foundation, either version 3.0 of the License, or *
* (at your option) any later version. *
* *
* IfcOpenShell is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* Lesser GNU General Public License for more details. *
* *
* You should have received a copy of the Lesser GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
********************************************************************************/
#ifndef IFCGEOMREPRESENTATION_H
#define IFCGEOMREPRESENTATION_H
#include "../ifcgeom/IfcGeomIteratorSettings.h"
#include "../ifcgeom/IfcGeomMaterial.h"
#include "../ifcgeom/ConversionResult.h"
namespace IfcGeom {
namespace Representation {
class IFC_GEOM_API Representation {
Representation(const Representation&); //N/A
Representation& operator =(const Representation&); //N/A
protected:
const ElementSettings _settings;
public:
explicit Representation(const ElementSettings& settings)
: _settings(settings)
{}
const ElementSettings& settings() const { return _settings; }
virtual ~Representation() {}
};
class IFC_GEOM_API Native : public Representation {
private:
unsigned int id;
const IfcGeom::ConversionResults _shapes;
Native(const Native& other);
Native& operator=(const Native& other);
public:
Native(const ElementSettings& settings, unsigned int id, const IfcGeom::ConversionResults& shapes)
: Representation(settings)
, id(id)
, _shapes(shapes)
{}
virtual ~Native() {}
IfcGeom::ConversionResults::const_iterator begin() const { return _shapes.begin(); }
IfcGeom::ConversionResults::const_iterator end() const { return _shapes.end(); }
const IfcGeom::ConversionResults& shapes() const { return _shapes; }
const unsigned int& getId() const { return id; }
};
class IFC_GEOM_API Serialization : public Representation {
private:
int _id;
std::string _brep_data;
std::vector<double> _surface_styles;
public:
int id() const { return _id; }
const std::string& brep_data() const { return _brep_data; }
const std::vector<double>& surface_styles() const { return _surface_styles; }
Serialization(const Native& brep);
virtual ~Serialization() {}
private:
Serialization();
Serialization(const Serialization&);
Serialization& operator=(const Serialization&);
};
template <typename P>
class IFC_GEOM_API Triangulation : public Representation {
protected:
// A nested pair of floats and a material index to be able to store an XYZ coordinate in a map.
// TODO: Make this a std::tuple when compilers add support for that.
typedef typename std::pair<P, std::pair<P, P> > Coordinate;
typedef typename std::pair<int, Coordinate> VertexKey;
typedef std::map<VertexKey, int> VertexKeyMap;
typedef std::pair<int, int> Edge;
int _id;
std::vector<P> _verts;
std::vector<int> _faces;
std::vector<int> _edges;
std::vector<P> _normals;
std::vector<P> uvs_;
std::vector<int> _material_ids;
std::vector<Material> _materials;
VertexKeyMap welds;
public:
int id() const { return _id; }
const std::vector<P>& verts() const { return _verts; }
const std::vector<int>& faces() const { return _faces; }
const std::vector<int>& edges() const { return _edges; }
const std::vector<P>& normals() const { return _normals; }
const std::vector<P>& uvs() const { return uvs_; }
const std::vector<int>& material_ids() const { return _material_ids; }
const std::vector<Material>& materials() const { return _materials; }
std::vector<P>& verts() { return _verts; }
std::vector<int>& faces() { return _faces; }
std::vector<int>& edges() { return _edges; }
std::vector<P>& normals() { return _normals; }
std::vector<P>& uvs() { return uvs_; }
std::vector<int>& material_ids() { return _material_ids; }
std::vector<Material>& materials() { return _materials; }
Triangulation(const Native& shape_model)
: Representation(shape_model.settings())
, _id(shape_model.getId())
{
for (IfcGeom::ConversionResults::const_iterator iit = shape_model.begin(); iit != shape_model.end(); ++iit) {
int surface_style_id = -1;
if (iit->hasStyle()) {
Material adapter(&iit->Style());
std::vector<Material>::const_iterator jt = std::find(_materials.begin(), _materials.end(), adapter);
if (jt == _materials.end()) {
surface_style_id = (int)_materials.size();
_materials.push_back(adapter);
} 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);
if (mit == _materials.end()) {
surface_style_id = (int)_materials.size();
_materials.push_back(material);
} else {
surface_style_id = (int)(mit - _materials.begin());
}
}
iit->Shape()->Triangulate(settings(), iit->Placement(), this, surface_style_id);
}
}
virtual ~Triangulation() {}
/// Generates UVs for a single mesh using box projection.
/// @todo Very simple impl. Assumes that input vertices and normals match 1:1.
static std::vector<P> box_project_uvs(const std::vector<P> &vertices, const std::vector<P> &normals)
{
std::vector<P> uvs;
uvs.resize(vertices.size() / 3 * 2);
for (size_t uv_idx = 0, v_idx = 0;
uv_idx < uvs.size() && v_idx < vertices.size() && v_idx < normals.size();
uv_idx += 2, v_idx += 3) {
P n_x = normals[v_idx], n_y = normals[v_idx + 1], n_z = normals[v_idx + 2];
P v_x = vertices[v_idx], v_y = vertices[v_idx + 1], v_z = vertices[v_idx + 2];
if (std::abs(n_x) > std::abs(n_y) && std::abs(n_x) > std::abs(n_z)) {
uvs[uv_idx] = v_z;
uvs[uv_idx + 1] = v_y;
}
if (std::abs(n_y) > std::abs(n_x) && std::abs(n_y) > std::abs(n_z)) {
uvs[uv_idx] = v_x;
uvs[uv_idx + 1] = v_z;
}
if (std::abs(n_z) > std::abs(n_x) && std::abs(n_z) > std::abs(n_y)) {
uvs[uv_idx] = v_x;
uvs[uv_idx + 1] = v_y;
}
}
return uvs;
}
public:
// Welds vertices that belong to different faces
int addVertex(int material_index, P X, P Y, P Z) {
const bool convert = settings().get(IteratorSettings::CONVERT_BACK_UNITS);
X = static_cast<P>(convert ? (X / settings().unit_magnitude()) : X);
Y = static_cast<P>(convert ? (Y / settings().unit_magnitude()) : Y);
Z = static_cast<P>(convert ? (Z / settings().unit_magnitude()) : Z);
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)));
typename VertexKeyMap::const_iterator it = welds.find(key);
if ( it != welds.end() ) return it->second;
i = (int) welds.size();
welds[key] = i;
}
_verts.push_back(X);
_verts.push_back(Y);
_verts.push_back(Z);
return i;
}
inline void addEdge(int n1, int n2, std::map<std::pair<int,int>,int>& edgecount, std::vector<std::pair<int,int> >& edges_temp) {
const Edge e = Edge( (std::min)(n1,n2),(std::max)(n1,n2) );
if ( edgecount.find(e) == edgecount.end() ) edgecount[e] = 1;
else edgecount[e] ++;
edges_temp.push_back(e);
}
private:
Triangulation();
Triangulation(const Triangulation&);
Triangulation& operator=(const Triangulation&);
};
}
}
#endif
Reference in New Issue View Git Blame Copy Permalink