460 lines
14 KiB
C++
460 lines
14 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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#ifndef __PolyVox_Region_H__
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#define __PolyVox_Region_H__
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#include "Impl/PlatformDefinitions.h"
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#include "PolyVox/Vector.h"
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namespace PolyVox
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{
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/** Represents a part of a Volume.
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*
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* Many operations in PolyVox are constrained to only part of a volume. For example, when running the surface extractors
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* it is unlikely that you will want to run it on the whole volume at once, as this will give a very large mesh which may
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* be too much to render. Instead you will probably want to run a surface extractor a number of times on different parts
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* of the volume, there by giving a number of meshes which can be culled and rendered seperately.
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*
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* The Region class is used to define these parts (regions) of the volume. Essentially it consists of an upper and lower
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* bound which specify the range of voxels positions considered to be part of the region. Note that these bounds are
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* <em>inclusive</em>.
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*
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* As well as the expected set of getters and setters, this class also provide utility functions for increasing and decresing
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* the size of the Region, shifting the Region in 3D space, testing whether it contains a given position, enlarging it so that
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* it does contain a given position, croppng it to another Region, and various other utility functions.
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*
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* \Note The dimensions of a region can be measured either in voxels or in cells. See the manual for more information
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* about these definitions.
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*
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*/
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class Region
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{
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public:
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/// A Region with the lower corner set as low as possible and the upper corner set as high as possible.
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static Region MaxRegion();
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/// A Region with the lower corner set as high as possible and the upper corner set as low as possible.
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static Region InvertedRegion();
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/// Constructor
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Region();
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/// Constructor
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Region(const Vector3DInt32& v3dLowerCorner, const Vector3DInt32& v3dUpperCorner);
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/// Constructor
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Region(int32_t iLowerX, int32_t iLowerY, int32_t iLowerZ, int32_t iUpperX, int32_t iUpperY, int32_t iUpperZ);
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/// Equality Operator.
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bool operator==(const Region& rhs) const;
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/// Inequality Operator.
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bool operator!=(const Region& rhs) const;
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/// Gets the 'x' position of the centre.
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int32_t getCentreX(void) const;
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/// Gets the 'y' position of the centre.
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int32_t getCentreY(void) const;
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/// Gets the 'z' position of the centrer.
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int32_t getCentreZ(void) const;
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/// Gets the 'x' position of the lower corner.
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int32_t getLowerX(void) const;
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/// Gets the 'y' position of the lower corner.
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int32_t getLowerY(void) const;
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/// Gets the 'z' position of the lower corner.
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int32_t getLowerZ(void) const;
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/// Gets the 'x' position of the upper corner.
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int32_t getUpperX(void) const;
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/// Gets the 'y' position of the upper corner.
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int32_t getUpperY(void) const;
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/// Gets the 'z' position of the upper corner.
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int32_t getUpperZ(void) const;
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/// Gets the centre of the region
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Vector3DInt32 getCentre(void) const;
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/// Gets the position of the lower corner.
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Vector3DInt32 getLowerCorner(void) const;
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/// Gets the position of the upper corner.
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Vector3DInt32 getUpperCorner(void) const;
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/// Gets the width of the region measured in voxels.
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int32_t getWidthInVoxels(void) const;
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/// Gets the height of the region measured in voxels.
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int32_t getHeightInVoxels(void) const;
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/// Gets the depth of the region measured in voxels.
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int32_t getDepthInVoxels(void) const;
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/// Gets the dimensions of the region measured in voxels.
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Vector3DInt32 getDimensionsInVoxels(void) const;
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/// Gets the width of the region measured in cells.
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int32_t getWidthInCells(void) const;
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/// Gets the height of the region measured in cells.
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int32_t getHeightInCells(void) const;
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/// Gets the depth of the region measured in cells.
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int32_t getDepthInCells(void) const;
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/// Gets the dimensions of the region measured in cells.
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Vector3DInt32 getDimensionsInCells(void) const;
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/// Sets the 'x' position of the lower corner.
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void setLowerX(int32_t iX);
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/// Sets the 'y' position of the lower corner.
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void setLowerY(int32_t iY);
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/// Sets the 'z' position of the lower corner.
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void setLowerZ(int32_t iZ);
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/// Sets the 'x' position of the upper corner.
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void setUpperX(int32_t iX);
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/// Sets the 'y' position of the upper corner.
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void setUpperY(int32_t iY);
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/// Sets the 'z' position of the upper corner.
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void setUpperZ(int32_t iZ);
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/// Sets the position of the lower corner.
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void setLowerCorner(const Vector3DInt32& v3dLowerCorner);
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/// Sets the position of the upper corner.
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void setUpperCorner(const Vector3DInt32& v3dUpperCorner);
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/// Tests whether the given point is contained in this Region.
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bool containsPoint(float fX, float fY, float fZ, float boundary = 0.0f) const;
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/// Tests whether the given point is contained in this Region.
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bool containsPoint(const Vector3DFloat& pos, float boundary = 0.0f) const;
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/// Tests whether the given point is contained in this Region.
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bool containsPoint(int32_t iX, int32_t iY, int32_t iZ, uint8_t boundary = 0) const;
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/// Tests whether the given point is contained in this Region.
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bool containsPoint(const Vector3DInt32& pos, uint8_t boundary = 0) const;
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/// Tests whether the given position is contained in the 'x' range of this Region.
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bool containsPointInX(float pos, float boundary = 0.0f) const;
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/// Tests whether the given position is contained in the 'x' range of this Region.
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bool containsPointInX(int32_t pos, uint8_t boundary = 0) const;
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/// Tests whether the given position is contained in the 'y' range of this Region.
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bool containsPointInY(float pos, float boundary = 0.0f) const;
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/// Tests whether the given position is contained in the 'y' range of this Region.
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bool containsPointInY(int32_t pos, uint8_t boundary = 0) const;
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/// Tests whether the given position is contained in the 'z' range of this Region.
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bool containsPointInZ(float pos, float boundary = 0.0f) const;
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/// Tests whether the given position is contained in the 'z' range of this Region.
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bool containsPointInZ(int32_t pos, uint8_t boundary = 0) const;
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/// Tests whether the given Region is contained in this Region.
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bool containsRegion(const Region& reg, uint8_t boundary = 0) const;
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/// Enlarges the Region so that it contains the specified position.
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void accumulate(int32_t iX, int32_t iY, int32_t iZ);
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/// Enlarges the Region so that it contains the specified position.
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void accumulate(const Vector3DInt32& v3dPos);
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/// Enlarges the Region so that it contains the specified Region.
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void accumulate(const Region& reg);
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/// Crops the extents of this Region accoring to another Region.
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void cropTo(const Region& other);
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/// Grows this region by the amount specified.
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void grow(int32_t iAmount);
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/// Grows this region by the amounts specified.
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void grow(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ);
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/// Grows this region by the amounts specified.
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void grow(const Vector3DInt32& v3dAmount);
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/// Tests whether all components of the upper corner are at least
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/// as great as the corresponding components of the lower corner.
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bool isValid(void) const;
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/// Moves the Region by the amount specified.
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void shift(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ);
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/// Moves the Region by the amount specified.
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void shift(const Vector3DInt32& v3dAmount);
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/// Moves the lower corner of the Region by the amount specified.
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void shiftLowerCorner(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ);
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/// Moves the lower corner of the Region by the amount specified.
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void shiftLowerCorner(const Vector3DInt32& v3dAmount);
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/// Moves the upper corner of the Region by the amount specified.
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void shiftUpperCorner(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ);
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/// Moves the upper corner of the Region by the amount specified.
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void shiftUpperCorner(const Vector3DInt32& v3dAmount);
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/// Shrinks this region by the amount specified.
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void shrink(int32_t iAmount);
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/// Shrinks this region by the amounts specified.
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void shrink(int32_t iAmountX, int32_t iAmountY, int32_t iAmountZ);
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/// Shrinks this region by the amounts specified.
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void shrink(const Vector3DInt32& v3dAmount);
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private:
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int32_t m_iLowerX;
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int32_t m_iLowerY;
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int32_t m_iLowerZ;
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int32_t m_iUpperX;
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int32_t m_iUpperY;
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int32_t m_iUpperZ;
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};
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// Non-member functions
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bool intersects(const Region& a, const Region& b);
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// Non-member overloaded operators.
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/// Stream insertion operator.
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std::ostream& operator<<(std::ostream& os, const Region& region);
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// Functions to be inlined to to be in the header rather than the .cpp.
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// 'inline' keyword is used for the definition rather than the declaration.
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// See also http://www.parashift.com/c++-faq-lite/inline-functions.html
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/**
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* \return The 'x' position of the centre.
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*/
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inline int32_t Region::getCentreX(void) const
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{
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return (m_iLowerX + m_iUpperX) / 2;
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}
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/**
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* \return The 'y' position of the centre.
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*/
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inline int32_t Region::getCentreY(void) const
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{
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return (m_iLowerY + m_iUpperY) / 2;
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}
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/**
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* \return The 'z' position of the centre.
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*/
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inline int32_t Region::getCentreZ(void) const
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{
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return (m_iLowerZ + m_iUpperZ) / 2;
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}
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/**
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* \return The 'x' position of the lower corner.
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*/
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inline int32_t Region::getLowerX(void) const
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{
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return m_iLowerX;
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}
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/**
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* \return The 'y' position of the lower corner.
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*/
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inline int32_t Region::getLowerY(void) const
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{
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return m_iLowerY;
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}
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/**
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* \return The 'z' position of the lower corner.
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*/
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inline int32_t Region::getLowerZ(void) const
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{
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return m_iLowerZ;
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}
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/**
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* \return The 'x' position of the upper corner.
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*/
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inline int32_t Region::getUpperX(void) const
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{
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return m_iUpperX;
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}
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/**
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* \return The 'y' position of the upper corner.
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*/
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inline int32_t Region::getUpperY(void) const
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{
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return m_iUpperY;
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}
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/**
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* \return The 'z' position of the upper corner.
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*/
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inline int32_t Region::getUpperZ(void) const
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{
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return m_iUpperZ;
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}
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/**
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* \return The position of the lower corner.
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*/
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inline Vector3DInt32 Region::getCentre(void) const
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{
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return Vector3DInt32(getCentreX(), getCentreY(), getCentreZ());
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}
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/**
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* \return The position of the lower corner.
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*/
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inline Vector3DInt32 Region::getLowerCorner(void) const
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{
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return Vector3DInt32(m_iLowerX, m_iLowerY, m_iLowerZ);
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}
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/**
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* \return The position of the upper corner.
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*/
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inline Vector3DInt32 Region::getUpperCorner(void) const
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{
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return Vector3DInt32(m_iUpperX, m_iUpperY, m_iUpperZ);
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}
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/**
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* \return The width of the region measured in voxels.
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* \sa getWidthInCells()
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*/
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inline int32_t Region::getWidthInVoxels(void) const
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{
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return getWidthInCells() + 1;
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}
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/**
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* \return The height of the region measured in voxels.
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* \sa getHeightInCells()
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*/
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inline int32_t Region::getHeightInVoxels(void) const
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{
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return getHeightInCells() + 1;
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}
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/**
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* \return The depth of the region measured in voxels.
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* \sa getDepthInCells()
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*/
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inline int32_t Region::getDepthInVoxels(void) const
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{
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return getDepthInCells() + 1;
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}
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/**
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* \return The dimensions of the region measured in voxels.
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* \sa getDimensionsInCells()
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*/
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inline Vector3DInt32 Region::getDimensionsInVoxels(void) const
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{
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return getDimensionsInCells() + Vector3DInt32(1, 1, 1);
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}
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/**
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* \return The width of the region measured in cells.
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* \sa getWidthInVoxels()
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*/
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inline int32_t Region::getWidthInCells(void) const
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{
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return m_iUpperX - m_iLowerX;
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}
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/**
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* \return The height of the region measured in cells.
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* \sa getHeightInVoxels()
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*/
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inline int32_t Region::getHeightInCells(void) const
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{
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return m_iUpperY - m_iLowerY;
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}
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/**
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* \return The depth of the region measured in cells.
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* \sa getDepthInVoxels()
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*/
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inline int32_t Region::getDepthInCells(void) const
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{
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return m_iUpperZ - m_iLowerZ;
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}
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/**
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* \return The dimensions of the region measured in cells.
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* \sa getDimensionsInVoxels()
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*/
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inline Vector3DInt32 Region::getDimensionsInCells(void) const
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{
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return Vector3DInt32(getWidthInCells(), getHeightInCells(), getDepthInCells());
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}
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/**
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* \param iX The new 'x' position of the lower corner.
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*/
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inline void Region::setLowerX(int32_t iX)
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{
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m_iLowerX = iX;
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}
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/**
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* \param iY The new 'y' position of the lower corner.
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*/
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inline void Region::setLowerY(int32_t iY)
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{
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m_iLowerY = iY;
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}
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/**
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* \param iZ The new 'z' position of the lower corner.
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*/
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inline void Region::setLowerZ(int32_t iZ)
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{
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m_iLowerZ = iZ;
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}
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/**
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* \param iX The new 'x' position of the upper corner.
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*/
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inline void Region::setUpperX(int32_t iX)
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{
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m_iUpperX = iX;
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}
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/**
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* \param iY The new 'y' position of the upper corner.
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*/
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inline void Region::setUpperY(int32_t iY)
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{
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m_iUpperY = iY;
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}
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/**
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* \param iZ The new 'z' position of the upper corner.
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*/
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inline void Region::setUpperZ(int32_t iZ)
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{
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m_iUpperZ = iZ;
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}
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/**
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* \param v3dLowerCorner The new position of the lower corner.
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*/
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inline void Region::setLowerCorner(const Vector3DInt32& v3dLowerCorner)
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{
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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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}
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/**
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* \param v3dUpperCorner The new position of the upper corner.
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*/
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inline void Region::setUpperCorner(const Vector3DInt32& v3dUpperCorner)
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{
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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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#include "PolyVox/Region.inl"
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#endif
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