/*******************************************************************************
Copyright (c) 2005-2009 David Williams

This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:

    1. The origin of this software must not be misrepresented; you must not
    claim that you wrote the original software. If you use this software
    in a product, an acknowledgment in the product documentation would be
    appreciated but is not required.

    2. Altered source versions must be plainly marked as such, and must not be
    misrepresented as being the original software.

    3. This notice may not be removed or altered from any source
    distribution. 	
*******************************************************************************/

#include "PolyVoxCore/Region.h"

#include <limits>

namespace PolyVox
{
	const Region Region::MaxRegion
	(
		Vector3DInt32((std::numeric_limits<int32_t>::min)(), (std::numeric_limits<int32_t>::min)(), (std::numeric_limits<int32_t>::min)()),
		Vector3DInt32((std::numeric_limits<int32_t>::max)(), (std::numeric_limits<int32_t>::max)(), (std::numeric_limits<int32_t>::max)())
	);


	Region::Region()
		:m_v3dLowerCorner(0,0,0)
		,m_v3dUpperCorner(0,0,0)
	{
	}

	Region::Region(const Vector3DInt32& v3dLowerCorner, const Vector3DInt32& v3dUpperCorner)
		:m_v3dLowerCorner(v3dLowerCorner)
		,m_v3dUpperCorner(v3dUpperCorner)
	{
		//Check the region is valid.
		assert(m_v3dUpperCorner.getX() >= m_v3dLowerCorner.getX());
		assert(m_v3dUpperCorner.getY() >= m_v3dLowerCorner.getY());
		assert(m_v3dUpperCorner.getZ() >= m_v3dLowerCorner.getZ());
	}

	Region::Region(int32_t iLowerX, int32_t iLowerY, int32_t iLowerZ, int32_t iUpperX, int32_t iUpperY, int32_t iUpperZ)
		:m_v3dLowerCorner(iLowerX, iLowerY, iLowerZ)
		,m_v3dUpperCorner(iUpperX, iUpperY, iUpperZ)
	{
		//Check the region is valid.
		assert(m_v3dUpperCorner.getX() >= m_v3dLowerCorner.getX());
		assert(m_v3dUpperCorner.getY() >= m_v3dLowerCorner.getY());
		assert(m_v3dUpperCorner.getZ() >= m_v3dLowerCorner.getZ());
	}

	/**
    Checks whether two Regions are equal.
    \param rhs The Region to compare to.
    \return true if the Regions match.
    \see operator!=
    */
    bool Region::operator==(const Region& rhs) const throw()
    {
		return ((m_v3dLowerCorner == rhs.m_v3dLowerCorner) && (m_v3dUpperCorner == rhs.m_v3dUpperCorner));
    }

	/**
    Checks whether two Regions are not equal.
    \param rhs The Region to compare to.
    \return true if the Regions do not match.
    \see operator==
    */
    bool Region::operator!=(const Region& rhs) const throw()
    {
		return !(*this == rhs);
    }

	const Vector3DInt32& Region::getLowerCorner(void) const
	{
		return m_v3dLowerCorner;
	}

	const Vector3DInt32& Region::getUpperCorner(void) const
	{
		return m_v3dUpperCorner;
	}	

	void Region::setLowerCorner(const Vector3DInt32& v3dLowerCorner)
	{
		m_v3dLowerCorner = v3dLowerCorner;
	}

	void Region::setUpperCorner(const Vector3DInt32& v3dUpperCorner)
	{
		m_v3dUpperCorner = v3dUpperCorner;
	}

	bool Region::containsPoint(const Vector3DFloat& pos, float boundary) const
	{
		return (pos.getX() <= m_v3dUpperCorner.getX() - boundary)
			&& (pos.getY() <= m_v3dUpperCorner.getY() - boundary)
			&& (pos.getZ() <= m_v3dUpperCorner.getZ() - boundary)
			&& (pos.getX() >= m_v3dLowerCorner.getX() + boundary)
			&& (pos.getY() >= m_v3dLowerCorner.getY() + boundary)
			&& (pos.getZ() >= m_v3dLowerCorner.getZ() + boundary);
	}

	bool Region::containsPoint(const Vector3DInt32& pos, uint8_t boundary) const
	{
		return (pos.getX() <= m_v3dUpperCorner.getX() - boundary)
			&& (pos.getY() <= m_v3dUpperCorner.getY() - boundary) 
			&& (pos.getZ() <= m_v3dUpperCorner.getZ() - boundary)
			&& (pos.getX() >= m_v3dLowerCorner.getX() + boundary)
			&& (pos.getY() >= m_v3dLowerCorner.getY() + boundary)
			&& (pos.getZ() >= m_v3dLowerCorner.getZ() + boundary);
	}

	bool Region::containsPointInX(float pos, float boundary) const
	{
		return (pos <= m_v3dUpperCorner.getX() - boundary)
			&& (pos >= m_v3dLowerCorner.getX() + boundary);
	}

	bool Region::containsPointInX(int32_t pos, uint8_t boundary) const
	{
		return (pos <= m_v3dUpperCorner.getX() - boundary)
			&& (pos >= m_v3dLowerCorner.getX() + boundary);
	}

	bool Region::containsPointInY(float pos, float boundary) const
	{
		return (pos <= m_v3dUpperCorner.getY() - boundary)
			&& (pos >= m_v3dLowerCorner.getY() + boundary);
	}

	bool Region::containsPointInY(int32_t pos, uint8_t boundary) const
	{
		return (pos <= m_v3dUpperCorner.getY() - boundary) 
			&& (pos >= m_v3dLowerCorner.getY() + boundary);
	}

	bool Region::containsPointInZ(float pos, float boundary) const
	{
		return (pos <= m_v3dUpperCorner.getZ() - boundary)
			&& (pos >= m_v3dLowerCorner.getZ() + boundary);
	}

	bool Region::containsPointInZ(int32_t pos, uint8_t boundary) const
	{
		return (pos <= m_v3dUpperCorner.getZ() - boundary)
			&& (pos >= m_v3dLowerCorner.getZ() + boundary);
	}

	void Region::cropTo(const Region& other)
	{
		m_v3dLowerCorner.setX((std::max)(m_v3dLowerCorner.getX(), other.m_v3dLowerCorner.getX()));
		m_v3dLowerCorner.setY((std::max)(m_v3dLowerCorner.getY(), other.m_v3dLowerCorner.getY()));
		m_v3dLowerCorner.setZ((std::max)(m_v3dLowerCorner.getZ(), other.m_v3dLowerCorner.getZ()));
		m_v3dUpperCorner.setX((std::min)(m_v3dUpperCorner.getX(), other.m_v3dUpperCorner.getX()));
		m_v3dUpperCorner.setY((std::min)(m_v3dUpperCorner.getY(), other.m_v3dUpperCorner.getY()));
		m_v3dUpperCorner.setZ((std::min)(m_v3dUpperCorner.getZ(), other.m_v3dUpperCorner.getZ()));
	}

	/// \deprecated Use getLowerCorner and getUpperCorner instead
	int32_t Region::depth(void) const
	{
		//This function is deprecated and wrong.
		assert(false);
		return m_v3dUpperCorner.getZ() - m_v3dLowerCorner.getZ();
	}

	/// \deprecated Use getLowerCorner and getUpperCorner instead
	int32_t Region::height(void) const
	{
		//This function is deprecated and wrong.
		assert(false);
		return m_v3dUpperCorner.getY() - m_v3dLowerCorner.getY();
	}

	void Region::shift(const Vector3DInt32& amount)
	{
		m_v3dLowerCorner += amount;
		m_v3dUpperCorner += amount;
	}

	void Region::shiftLowerCorner(const Vector3DInt32& amount)
	{
		m_v3dLowerCorner += amount;
	}

	void Region::shiftUpperCorner(const Vector3DInt32& amount)
	{
		m_v3dUpperCorner += amount;
	}

	/// \deprecated Use getLowerCorner and getUpperCorner instead
	Vector3DInt32 Region::dimensions(void)
	{
		//This function is deprecated and wrong.
		assert(false);
		return m_v3dUpperCorner - m_v3dLowerCorner;
	}

	/// \deprecated Use getLowerCorner and getUpperCorner instead
	int32_t Region::width(void) const
	{
		//This function is deprecated and wrong.
		assert(false);
		return m_v3dUpperCorner.getX() - m_v3dLowerCorner.getX();
	}
}
