FEDataStream.h

/*This file is part of the FEBio source code and is licensed under the MIT license
listed below.

See Copyright-FEBio.txt for details.

Copyright (c) 2021 University of Utah, The Trustees of Columbia University in
the City of New York, and others.

Permission is hereby granted, free of charge, to any person obtaining a copy
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#pragma once
#include "vec3d.h"
#include "mat3d.h"
#include "tens4d.h"

//-----------------------------------------------------------------------------
// This class can be used to serialize data.
// This is part of a new experimental feature that allows domain classes to define
// data exports. This in turn will eliminate the need for many of the plot classes. 
// TODO: This looks a lot like a FEDataArray. Perhaps combine?
class FEDataStream
{
public:
	FEDataStream(){}

	void clear() { m_a.clear(); }

	FEDataStream& operator << (const double& f) { m_a.push_back((float) f); return *this; }
	FEDataStream& operator << (const vec3d& v) 
	{
		m_a.push_back((float) v.x);
		m_a.push_back((float) v.y);
		m_a.push_back((float) v.z);
		return *this;
	}
	FEDataStream& operator << (const mat3ds& m) 
	{
		m_a.push_back((float) m.xx());
		m_a.push_back((float) m.yy());
		m_a.push_back((float) m.zz());
		m_a.push_back((float) m.xy());
		m_a.push_back((float) m.yz());
		m_a.push_back((float) m.xz());
		return *this;
	}
	FEDataStream& operator << (const mat3d& m)
	{
		m_a.push_back((float)m(0, 0));
		m_a.push_back((float)m(0, 1));
		m_a.push_back((float)m(0, 2));
		m_a.push_back((float)m(1, 0));
		m_a.push_back((float)m(1, 1));
		m_a.push_back((float)m(1, 2));
		m_a.push_back((float)m(2, 0));
		m_a.push_back((float)m(2, 1));
		m_a.push_back((float)m(2, 2));
		return *this;
	}
	FEDataStream& operator << (const tens4ds& a)
	{
        for (int k=0; k<21; ++k) m_a.push_back((float) a.d[k]);
		return *this;
	}

	FEDataStream& operator << (const std::vector<double>& a)
	{
		for (double ai : a) m_a.push_back((float)ai);
		return *this;
	}

	FEDataStream& operator << (const std::vector<vec3d>& a)
	{
		for (vec3d ai : a)
		{
			m_a.push_back((float)ai.x);
			m_a.push_back((float)ai.y);
			m_a.push_back((float)ai.z);
		}
		return *this;
	}

	void assign(size_t count, float f) { m_a.assign(count, f); }
	void resize(size_t count, float f) { m_a.resize(count, f); }
	void reserve(size_t count) { m_a.reserve(count); }
	void push_back(const float& f) { m_a.push_back(f); }
	size_t size() const { return m_a.size(); }

	float& operator [] (int i) { return m_a[i]; }

	std::vector<float>& data() { return m_a; }

	template <class T> T get(int i);

private:
	std::vector<float>	m_a;
};

template <class T> inline T FEDataStream::get(int i) { return T(0.0);  }

template <> inline float  FEDataStream::get<float >(int i) { return m_a[i]; }
template <> inline double FEDataStream::get<double>(int i) { return (double) m_a[i]; }
template <> inline vec3d  FEDataStream::get<vec3d >(int i) { return vec3d(m_a[3*i], m_a[3*i+1], m_a[3*i+2]); }
template <> inline vec3f  FEDataStream::get<vec3f >(int i) { return vec3f(m_a[3*i], m_a[3*i+1], m_a[3*i+2]); }
template <> inline mat3fs FEDataStream::get<mat3fs>(int i) { float* v = &m_a[6*i]; return mat3fs(v[0],v[1],v[2],v[3],v[4],v[5]); }
template <> inline mat3f  FEDataStream::get<mat3f >(int i) { float* v = &m_a[9*i]; return mat3f(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7],v[8]); }