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Added function to check whether one region is inside of another.

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This commit is contained in:
Daviw Williams 2013-05-27 14:01:55 +02:00
parent 61dd59c9bc
commit 869f5f6c49
2 changed files with 20 additions and 0 deletions
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3
library/PolyVoxCore/include/PolyVoxCore/Region.h
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@ -149,6 +149,9 @@ namespace PolyVox
/// Tests whether the given position is contained in the 'z' range of this Region.
bool containsPointInZ(int32_t pos, uint8_t boundary = 0) const;
/// Tests whether the given Region is contained in this Region.
bool containsRegion(const Region& reg, uint8_t boundary = 0) const;
/// Enlarges the Region so that it contains the specified position.
void accumulate(int32_t iX, int32_t iY, int32_t iZ);
/// Enlarges the Region so that it contains the specified position.

17
library/PolyVoxCore/source/Region.cpp
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@ -301,6 +301,23 @@ namespace PolyVox
&& (pos >= m_iLowerZ + boundary);
}
/**
* The boundary value can be used to ensure a region is only considered to be inside
* another Region if it is that far in in all directions. Also, the test is inclusive such
* that a region is considered to be inside of itself.
* \param reg The region to test.
* \param boundary The desired boundary value.
*/
bool Region::containsRegion(const Region& reg, uint8_t boundary) const
{
return (reg.m_iUpperX <= m_iUpperX - boundary)
&& (reg.m_iUpperY <= m_iUpperY - boundary)
&& (reg.m_iUpperZ <= m_iUpperZ - boundary)
&& (reg.m_iLowerX >= m_iLowerX + boundary)
&& (reg.m_iLowerY >= m_iLowerY + boundary)
&& (reg.m_iLowerZ >= m_iLowerZ + boundary);
}
/**
* After calling this functions, the extents of this Region are given by the intersection
* of this Region and the one it was cropped to.