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#include "spline.hpp"
#include "../base/logging.hpp"
#include "../std/numeric.hpp"
namespace m2
{
Spline::Spline(vector<PointD> const & path)
{
ASSERT(path.size() > 1, ("Wrong path size!"));
m_position.assign(path.begin(), path.end());
int cnt = m_position.size() - 1;
m_direction = vector<PointD>(cnt);
m_length = vector<double>(cnt);
for(int i = 0; i < cnt; ++i)
{
m_direction[i] = path[i+1] - path[i];
m_length[i] = m_direction[i].Length();
m_direction[i] = m_direction[i].Normalize();
}
}
void Spline::AddPoint(PointD const & pt)
{
/// TODO remove this check when fix generator.
/// Now we have line objects with zero length segments
if (!IsEmpty() && (pt - m_position.back()).IsAlmostZero())
{
LOG(LDEBUG, ("Found seqment with zero lenth (the ended points are same)"));
return;
}
if(IsEmpty())
m_position.push_back(pt);
else
{
PointD dir = pt - m_position.back();
m_position.push_back(pt);
m_length.push_back(dir.Length());
m_direction.push_back(dir.Normalize());
}
}
bool Spline::IsEmpty() const
{
return m_position.empty();
}
bool Spline::IsValid() const
{
return m_position.size() > 1;
}
Spline const & Spline::operator = (Spline const & spl)
{
if(&spl != this)
{
m_position = spl.m_position;
m_direction = spl.m_direction;
m_length = spl.m_length;
}
return *this;
}
double Spline::GetLength() const
{
return accumulate(m_length.begin(), m_length.end(), 0.0);
}
Spline::iterator::iterator()
: m_checker(false)
, m_spl(NULL)
, m_index(0)
, m_dist(0) {}
void Spline::iterator::Attach(Spline const & spl)
{
m_spl = &spl;
m_index = 0;
m_dist = 0;
m_checker = false;
m_dir = m_spl->m_direction[m_index];
m_avrDir = m_spl->m_direction[m_index];
m_pos = m_spl->m_position[m_index] + m_dir * m_dist;
}
void Spline::iterator::Step(double speed)
{
m_dist += speed;
if (m_checker)
{
m_pos = m_spl->m_position[m_index] + m_dir * m_dist;
return;
}
while (m_dist > m_spl->m_length[m_index])
{
m_dist -= m_spl->m_length[m_index];
m_index++;
if (m_index >= m_spl->m_direction.size())
{
m_index--;
m_dist += m_spl->m_length[m_index];
m_checker = true;
break;
}
}
m_dir = m_spl->m_direction[m_index];
m_avrDir = -m_pos;
m_pos = m_spl->m_position[m_index] + m_dir * m_dist;
m_avrDir += m_pos;
}
void Spline::iterator::StepBack(double speed)
{
m_dist -= speed;
while(m_dist < 0.0f)
{
m_index--;
m_dist += m_spl->m_length[m_index];
}
m_dir = m_spl->m_direction[m_index];
m_avrDir = -m_pos;
m_pos = m_spl->m_position[m_index] + m_dir * m_dist;
m_avrDir += m_pos;
}
double Spline::iterator::GetLength() const
{
return accumulate(m_spl->m_length.begin(), m_spl->m_length.begin() + m_index, m_dist);
}
double Spline::iterator::GetFullLength() const
{
return m_spl->GetLength();
}
bool Spline::iterator::BeginAgain() const
{
return m_checker;
}
double Spline::iterator::GetDistance() const
{
return m_dist;
}
int Spline::iterator::GetIndex() const
{
return m_index;
}
SharedSpline::SharedSpline(vector<PointD> const & path)
{
m_spline.reset(new Spline(path));
}
SharedSpline::SharedSpline(SharedSpline const & other)
{
if (this != &other)
m_spline = other.m_spline;
}
SharedSpline const & SharedSpline::operator= (SharedSpline const & spl)
{
if (this != &spl)
m_spline = spl.m_spline;
return *this;
}
bool SharedSpline::IsNull() const
{
return m_spline == NULL;
}
void SharedSpline::Reset(Spline * spline)
{
m_spline.reset(spline);
}
void SharedSpline::Reset(vector<PointD> const & path)
{
m_spline.reset(new Spline(path));
}
Spline::iterator SharedSpline::CreateIterator() const
{
Spline::iterator result;
result.Attach(*m_spline.get());
return result;
}
Spline * SharedSpline::operator->()
{
ASSERT(!IsNull(), ());
return m_spline.get();
}
Spline const * SharedSpline::operator->() const
{
ASSERT(!IsNull(), ());
return m_spline.get();
}
}
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