471 lines
17 KiB
C++
471 lines
17 KiB
C++
/*******************************************************************************
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Copyright (c) 2005-2009 David Williams
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*******************************************************************************/
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#include "PolyVoxCore/Region.h"
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#include <limits>
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namespace PolyVox
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{
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/**
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*/
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const Region Region::MaxRegion
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(
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Vector3DInt32((std::numeric_limits<int32_t>::min)(), (std::numeric_limits<int32_t>::min)(), (std::numeric_limits<int32_t>::min)()),
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Vector3DInt32((std::numeric_limits<int32_t>::max)(), (std::numeric_limits<int32_t>::max)(), (std::numeric_limits<int32_t>::max)())
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);
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/**
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* This Region is not considered valid as defined by isValid(). It's main application
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* is to initialise a Region to this value and then() accumulate positions. The result
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* of this will be a Region which encompasses all positions specified.
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*/
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const Region Region::InvertedRegion
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(
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Vector3DInt32((std::numeric_limits<int32_t>::max)(), (std::numeric_limits<int32_t>::max)(), (std::numeric_limits<int32_t>::max)()),
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Vector3DInt32((std::numeric_limits<int32_t>::min)(), (std::numeric_limits<int32_t>::min)(), (std::numeric_limits<int32_t>::min)())
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);
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/**
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* \param iX The 'x' component of the position to accumulate.
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* \param iY The 'y' component of the position to accumulate.
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* \param iZ The 'z' component of the position to accumulate.
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*/
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void Region::accumulate(int32_t iX, int32_t iY, int32_t iZ)
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{
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m_iLowerX = ((std::min)(m_iLowerX, iX));
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m_iLowerY = ((std::min)(m_iLowerY, iY));
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m_iLowerZ = ((std::min)(m_iLowerZ, iZ));
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m_iUpperX = ((std::max)(m_iUpperX, iX));
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m_iUpperY = ((std::max)(m_iUpperY, iY));
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m_iUpperZ = ((std::max)(m_iUpperZ, iZ));
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}
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/**
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* \param v3dPos The position to accumulate.
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*/
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void Region::accumulate(const Vector3DInt32& v3dPos)
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{
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accumulate(v3dPos.getX(), v3dPos.getY(), v3dPos.getZ());
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}
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/**
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* Note that this is not the same as computing the union of two Regions (as the result of
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* such a union may not be a shape which can be exactly represented by a Region). Instead,
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* the result is simply big enough to contain both this Region and the one passed as a parameter.
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* \param reg The Region to accumulate. This must be valid as defined by the isValid() function.
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* \sa isValid()
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*/
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void Region::accumulate(const Region& reg)
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{
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POLYVOX_ASSERT(reg.isValid(), "You cannot accumulate an invalid region."); //The result of accumulating an invalid region is not defined.
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m_iLowerX = ((std::min)(m_iLowerX, reg.getLowerX()));
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m_iLowerY = ((std::min)(m_iLowerY, reg.getLowerY()));
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m_iLowerZ = ((std::min)(m_iLowerZ, reg.getLowerZ()));
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m_iUpperX = ((std::max)(m_iUpperX, reg.getUpperX()));
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m_iUpperY = ((std::max)(m_iUpperY, reg.getUpperY()));
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m_iUpperZ = ((std::max)(m_iUpperZ, reg.getUpperZ()));
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}
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/**
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* Constructs a Region and clears all extents to zero.
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*/
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Region::Region()
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:m_iLowerX(0)
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,m_iLowerY(0)
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,m_iLowerZ(0)
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,m_iUpperX(0)
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,m_iUpperY(0)
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,m_iUpperZ(0)
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{
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}
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/**
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* Constructs a Region and sets the lower and upper corners to the specified values.
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* \param v3dLowerCorner The desired lower corner of the Region.
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* \param v3dUpperCorner The desired upper corner of the Region.
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*/
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Region::Region(const Vector3DInt32& v3dLowerCorner, const Vector3DInt32& v3dUpperCorner)
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:m_iLowerX(v3dLowerCorner.getX())
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,m_iLowerY(v3dLowerCorner.getY())
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,m_iLowerZ(v3dLowerCorner.getZ())
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,m_iUpperX(v3dUpperCorner.getX())
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,m_iUpperY(v3dUpperCorner.getY())
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,m_iUpperZ(v3dUpperCorner.getZ())
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{
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}
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/**
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* Constructs a Region and sets the extents to the specified values.
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* \param iLowerX The desired lower 'x' extent of the Region.
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* \param iLowerY The desired lower 'y' extent of the Region.
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* \param iLowerZ The desired lower 'z' extent of the Region.
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* \param iUpperX The desired upper 'x' extent of the Region.
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* \param iUpperY The desired upper 'y' extent of the Region.
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* \param iUpperZ The desired upper 'z' extent of the Region.
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*/
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Region::Region(int32_t iLowerX, int32_t iLowerY, int32_t iLowerZ, int32_t iUpperX, int32_t iUpperY, int32_t iUpperZ)
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:m_iLowerX(iLowerX)
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,m_iLowerY(iLowerY)
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,m_iLowerZ(iLowerZ)
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,m_iUpperX(iUpperX)
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,m_iUpperY(iUpperY)
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,m_iUpperZ(iUpperZ)
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{
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}
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/**
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* Two regions are considered equal if all their extents match.
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* \param rhs The Region to compare to.
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* \return true if the Regions match.
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* \sa operator!=
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*/
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bool Region::operator==(const Region& rhs) const
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{
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return ((m_iLowerX == rhs.m_iLowerX) && (m_iLowerY == rhs.m_iLowerY) && (m_iLowerZ == rhs.m_iLowerZ)
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&& (m_iUpperX == rhs.m_iUpperX) && (m_iUpperY == rhs.m_iUpperY) && (m_iUpperZ == rhs.m_iUpperZ));
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}
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////////////////////////////////////////////////////////////////////////////////
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/// Two regions are considered different if any of their extents differ.
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/// \param rhs The Region to compare to.
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/// \return true if the Regions are different.
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/// \sa operator==
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////////////////////////////////////////////////////////////////////////////////
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bool Region::operator!=(const Region& rhs) const
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{
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return !(*this == rhs);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in all directions. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param fX The 'x' position of the point to test.
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* \param fY The 'y' position of the point to test.
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* \param fZ The 'z' position of the point to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPoint(float fX, float fY, float fZ, float boundary) const
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{
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return (fX <= m_iUpperX - boundary)
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&& (fY <= m_iUpperY - boundary)
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&& (fZ <= m_iUpperZ - boundary)
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&& (fX >= m_iLowerX + boundary)
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&& (fY >= m_iLowerY + boundary)
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&& (fZ >= m_iLowerZ + boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in all directions. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPoint(const Vector3DFloat& pos, float boundary) const
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{
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return containsPoint(pos.getX(), pos.getY(), pos.getZ(), boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in all directions. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param iX The 'x' position of the point to test.
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* \param iY The 'y' position of the point to test.
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* \param iZ The 'z' position of the point to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPoint(int32_t iX, int32_t iY, int32_t iZ, uint8_t boundary) const
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{
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return (iX <= m_iUpperX - boundary)
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&& (iY <= m_iUpperY - boundary)
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&& (iZ <= m_iUpperZ - boundary)
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&& (iX >= m_iLowerX + boundary)
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&& (iY >= m_iLowerY + boundary)
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&& (iZ >= m_iLowerZ + boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in all directions. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPoint(const Vector3DInt32& pos, uint8_t boundary) const
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{
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return containsPoint(pos.getX(), pos.getY(), pos.getZ(), boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in the 'x' direction. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPointInX(float pos, float boundary) const
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{
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return (pos <= m_iUpperX - boundary)
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&& (pos >= m_iLowerX + boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in the 'x' direction. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPointInX(int32_t pos, uint8_t boundary) const
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{
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return (pos <= m_iUpperX - boundary)
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&& (pos >= m_iLowerX + boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in the 'y' direction. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPointInY(float pos, float boundary) const
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{
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return (pos <= m_iUpperY - boundary)
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&& (pos >= m_iLowerY + boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in the 'y' direction. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPointInY(int32_t pos, uint8_t boundary) const
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{
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return (pos <= m_iUpperY - boundary)
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&& (pos >= m_iLowerY + boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in the 'z' direction. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPointInZ(float pos, float boundary) const
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{
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return (pos <= m_iUpperZ - boundary)
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&& (pos >= m_iLowerZ + boundary);
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}
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/**
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* The boundary value can be used to ensure a position is only considered to be inside
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* the Region if it is that far in in the 'z' direction. Also, the test is inclusive such
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* that positions lying exactly on the edge of the Region are considered to be inside it.
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* \param pos The position to test.
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* \param boundary The desired boundary value.
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*/
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bool Region::containsPointInZ(int32_t pos, uint8_t boundary) const
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{
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return (pos <= m_iUpperZ - boundary)
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&& (pos >= m_iLowerZ + boundary);
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}
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/**
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* After calling this functions, the extents of this Region are given by the intersection
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* of this Region and the one it was cropped to.
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* \param other The Region to crop to.
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*/
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void Region::cropTo(const Region& other)
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{
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m_iLowerX = ((std::max)(m_iLowerX, other.m_iLowerX));
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m_iLowerY = ((std::max)(m_iLowerY, other.m_iLowerY));
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m_iLowerZ = ((std::max)(m_iLowerZ, other.m_iLowerZ));
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m_iUpperX = ((std::min)(m_iUpperX, other.m_iUpperX));
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m_iUpperY = ((std::min)(m_iUpperY, other.m_iUpperY));
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m_iUpperZ = ((std::min)(m_iUpperZ, other.m_iUpperZ));
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}
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/**
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* The same amount of growth is applied in all directions. Negative growth
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* is possible but you should prefer the shrink() function for clarity.
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* \param iAmount The amount to grow by.
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*/
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void Region::grow(int32_t iAmount)
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{
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m_iLowerX -= iAmount;
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m_iLowerY -= iAmount;
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m_iLowerZ -= iAmount;
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m_iUpperX += iAmount;
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m_iUpperY += iAmount;
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m_iUpperZ += iAmount;
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}
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/**
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* The amount can be specified seperatly for each direction. Negative growth
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* is possible but you should prefer the shrink() function for clarity.
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* \param iAmountX The amount to grow by in 'x'.
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* \param iAmountY The amount to grow by in 'y'.
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* \param iAmountZ The amount to grow by in 'z'.
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*/
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void Region::grow(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ)
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{
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m_iLowerX -= iAmountX;
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m_iLowerY -= iAmountY;
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m_iLowerZ -= iAmountZ;
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m_iUpperX += iAmountX;
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m_iUpperY += iAmountY;
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m_iUpperZ += iAmountZ;
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}
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/**
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* The amount can be specified seperatly for each direction. Negative growth
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* is possible but you should prefer the shrink() function for clarity.
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* \param v3dAmount The amount to grow by (one component for each direction).
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*/
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void Region::grow(const Vector3DInt32& v3dAmount)
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{
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grow(v3dAmount.getX(), v3dAmount.getY(), v3dAmount.getZ());
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}
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/**
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*/
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bool Region::isValid(void) const
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{
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return (m_iUpperX >= m_iLowerX) && (m_iUpperY >= m_iLowerY) && (m_iUpperZ >= m_iLowerZ);
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}
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/**
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* \param iAmountX The amount to move the Region by in 'x'.
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* \param iAmountY The amount to move the Region by in 'y'.
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* \param iAmountZ The amount to move the Region by in 'z'.
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*/
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void Region::shift(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ)
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{
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shiftLowerCorner(iAmountX, iAmountY, iAmountZ);
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shiftUpperCorner(iAmountX, iAmountY, iAmountZ);
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}
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/**
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* \param v3dAmount The amount to move the Region by.
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*/
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void Region::shift(const Vector3DInt32& v3dAmount)
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{
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shiftLowerCorner(v3dAmount);
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shiftUpperCorner(v3dAmount);
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}
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/**
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* \param iAmountX The amount to move the lower corner by in 'x'.
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* \param iAmountY The amount to move the lower corner by in 'y'.
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* \param iAmountZ The amount to move the lower corner by in 'z'.
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*/
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void Region::shiftLowerCorner(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ)
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{
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m_iLowerX += iAmountX;
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m_iLowerY += iAmountY;
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m_iLowerZ += iAmountZ;
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}
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/**
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* \param v3dAmount The amount to move the lower corner by.
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*/
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void Region::shiftLowerCorner(const Vector3DInt32& v3dAmount)
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{
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shiftLowerCorner(v3dAmount.getX(), v3dAmount.getY(), v3dAmount.getZ());
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}
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/**
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* \param iAmountX The amount to move the upper corner by in 'x'.
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* \param iAmountY The amount to move the upper corner by in 'y'.
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* \param iAmountZ The amount to move the upper corner by in 'z'.
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*/
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void Region::shiftUpperCorner(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ)
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{
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m_iUpperX += iAmountX;
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m_iUpperY += iAmountY;
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m_iUpperZ += iAmountZ;
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}
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/**
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* \param v3dAmount The amount to move the upper corner by.
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*/
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void Region::shiftUpperCorner(const Vector3DInt32& v3dAmount)
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{
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shiftUpperCorner(v3dAmount.getX(), v3dAmount.getY(), v3dAmount.getZ());
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}
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/**
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* The same amount of shrinkage is applied in all directions. Negative shrinkage
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* is possible but you should prefer the grow() function for clarity.
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* \param iAmount The amount to shrink by.
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*/
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void Region::shrink(int32_t iAmount)
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{
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m_iLowerX += iAmount;
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m_iLowerY += iAmount;
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m_iLowerZ += iAmount;
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m_iUpperX -= iAmount;
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m_iUpperY -= iAmount;
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m_iUpperZ -= iAmount;
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}
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/**
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* The amount can be specified seperatly for each direction. Negative shrinkage
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* is possible but you should prefer the grow() function for clarity.
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* \param iAmountX The amount to shrink by in 'x'.
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* \param iAmountY The amount to shrink by in 'y'.
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* \param iAmountZ The amount to shrink by in 'z'.
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*/
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void Region::shrink(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ)
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{
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m_iLowerX += iAmountX;
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m_iLowerY += iAmountY;
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m_iLowerZ += iAmountZ;
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m_iUpperX -= iAmountX;
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m_iUpperY -= iAmountY;
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m_iUpperZ -= iAmountZ;
|
|
}
|
|
|
|
/**
|
|
* The amount can be specified seperatly for each direction. Negative shrinkage
|
|
* is possible but you should prefer the grow() function for clarity.
|
|
* \param v3dAmount The amount to shrink by (one component for each direction).
|
|
*/
|
|
void Region::shrink(const Vector3DInt32& v3dAmount)
|
|
{
|
|
shrink(v3dAmount.getX(), v3dAmount.getY(), v3dAmount.getZ());
|
|
}
|
|
}
|