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surface.hh
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/**
* @file surface.hh
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
* @date Mon Jan 23 09:00:00 2012
*
* @brief contact surface classes
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_CSURFACE_HH__
#define __AKANTU_CSURFACE_HH__
#include <set>
#include "aka_common.hh"
#include "aka_bounding_box.hh"
#include "contact_common.hh"
#include "solid_mechanics_model.hh"
__BEGIN_AKANTU__
template <int d, class model_type>
BoundingBox<d> getBoundingBox(const Element& el, model_type& model) {
typedef BoundingBox<d> bbox_type;
typedef typename BoundingBox<d>::point_type point_type;
Mesh &mesh = model.getMesh();
const Vector<Real> &x = model.getCurrentPosition();
// for each element, construct the bounding box
bbox_type elem_bb = bbox_type();
UInt nb_nodes = mesh.getNbNodesPerElement(el.type);
const Vector<UInt> &conn = mesh.getConnectivity(el.type);
for (UInt n = 0; n<nb_nodes; ++n) {
UInt node = conn(el.element, n);
elem_bb += point_type(&x(node));
}
return elem_bb;
}
//! This class represents a contact element surface
template <int d>
class CSurface {
struct Element_set_comparator {
bool operator()(const Element& el1, const Element& el2) const
{ return el1.element < el2.element; }
};
public:
// type definitions
typedef BoundingBox<d> bbox_type;
typedef typename bbox_type::point_type point_type;
typedef SolidMechanicsModel model_type;
typedef std::set<Element, Element_set_comparator> element_container;
typedef typename element_container::const_iterator element_iterator;
typedef std::set<UInt> node_container;
typedef typename node_container::const_iterator node_iterator;
private:
element_container elements_; //!< Surface sides
node_container nodes_; //!< Surface nodes
bbox_type bbox_; //!< Bounding box
const model_type &model_; //!< Reference to model
public:
CSurface(const model_type &model) : elements_(), bbox_(), model_(model) {}
CSurface& operator=(const CSurface& cs) {
if (this != &cs) {
new (this) CSurface(cs);
}
return *this;
}
void update_bounding_box() {
bbox_ = bbox_type();
const Vector<Real> &x = model_.getCurrentPosition();
// loop over all nodes to find out bounding box
for (node_iterator it = nodes_.begin(); it != nodes_.end(); ++it)
bbox_ += point_type(&x(*it));
}
bbox_type const& bounding_box() const
{ return bbox_; }
//! Add an element to the surface
void add_element(ElementType type, UInt id)
{ elements_.insert(Element(type, id)); }
void add_node(UInt n)
{ nodes_.insert(n); }
//! Return the number of elements in the surface
UInt size() const
{ return elements_.size(); }
void intersects(const bbox_type& bb, std::set<const Element*>& intersected) const {
// loop over elements
for (element_iterator it = elements_.begin(); it != elements_.end(); ++it) {
// for each element, construct the bounding box
bbox_type elem_bb = getBoundingBox<d>(*it, model_);
// check for bounding box intersection
if (bb & elem_bb)
intersected.insert(&*it);
} // loop over elements
}
bool in_surface(UInt np, const Element* sp) const {
element_iterator elit = elements_.find(*sp);
if (elit == elements_.end())
return false;
node_iterator nit = nodes_.find(np);
if (nit == nodes_.end())
return false;
return true;
}
//! Enable std output
friend std::ostream& operator<<(std::ostream& os, const CSurface& s) {
os<<" Contact surface: "<<endl;
os<<" bounding box: "<<s.bounding_box()<<endl;
os<<" "<< s.elements_.size()<<" surface elements:"<<endl;
for (typename CSurface::element_iterator it = s.elements_.begin(); it != s.elements_.end(); ++it)
os<<" "<<it->element;
os<<"\n "<<s.nodes_.size()<<" surface nodes:"<<endl;
for (typename CSurface::node_iterator it = s.nodes_.begin(); it != s.nodes_.end(); ++it)
os<<" "<<*it;
return os<<endl;
}
};
__END_AKANTU__
#endif /* __AKANTU_CSURFACE_HH__ */

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