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Dimension.hpp
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Dimension.hpp
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/******************************************************************************
* $Id$
*
* Project: libLAS - http://liblas.org - A BSD library for LAS format data.
* Purpose: LAS Dimension implementation for C++ libLAS
* Author: Howard Butler, hobu.inc@gmail.com
*
******************************************************************************
* Copyright (c) 2010, Howard Butler
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the Martin Isenburg or Iowa Department
* of Natural Resources nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#ifndef PDAL_DIMENSION_HPP_INCLUDED
#define PDAL_DIMENSION_HPP_INCLUDED
#include <pdal/pdal_internal.hpp>
#include <pdal/Utils.hpp>
#include <boost/property_tree/ptree.hpp>
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/uuid_generators.hpp>
#include <limits>
#ifdef PDAL_COMPILER_MSVC
# pragma warning(push)
# pragma warning(disable: 4127) // conditional expression is constant
#endif
namespace pdal
{
namespace dimension
{
typedef boost::uuids::uuid id;
enum Flags
{
Invalid = 0x0,
IsAdded = 0x1,
IsRead = 0x2,
IsWritten = 0x4,
IsIgnored = 0x8
};
typedef boost::int32_t size_type;
enum Interpretation
{
SignedByte,
UnsignedByte,
SignedInteger,
UnsignedInteger,
Pointer,
Float,
Undefined
};
} // dimension
/// A pdal::Dimension is the description of a single data field in a pdal::Schema.
/// A pdal::Dimension is composed of a name, interpretation, and a size.
/// When a dimension is added to a pdal::Schema, it also gets two more properties: the position (index)
/// of this dimension in the schema's list of dimensions, and the byte offset where the dimension
/// is stored in the PointBuffer's raw bytes
class PDAL_DLL Dimension
{
public:
/** @name Constructors
*/
/// Base constructor for pdal::Dimension
/// @param name the name to use for the dimension.
/// Typically "X" or "Y" or "Interesting Scanner Attribute"
/// @param interpretation the pdal::dimension::Interpretation to use for the
/// dimension.
/// @param sizeInBytes the size of the pdal::Dimension in bytes. No
/// less-than-a-byte dimensions are allowed.
/// @param description a string description of the dimension.
Dimension(std::string const& name,
dimension::Interpretation interpretation,
dimension::size_type sizeInBytes,
std::string description=std::string(""));
/// Copy constructor
Dimension(Dimension const& other);
/// Assignment constructor
Dimension& operator=(Dimension const& rhs);
/** @name Equality and Comparisons
*/
/// Equality
bool operator==(const Dimension& other) const;
/// Inequality
bool operator!=(const Dimension& other) const;
/// Less than. Determined by getPosition() for sorting.
inline bool operator < (Dimension const& dim) const
{
return m_position < dim.m_position;
}
/// Greater than. Determined by getPosition for sorting.
inline bool operator > (Dimension const& dim) const
{
return m_position > dim.m_position;
}
/** @name Attributes
*/
/// @return the name of this dimension as given at construction time
inline std::string const& getName() const
{
return m_name;
}
/// @return the interpretation of this dimension at construction time
inline dimension::Interpretation getInterpretation() const
{
return m_interpretation;
}
/// @return dimension attribute flags (isValid, isRead, isWritten, isIgnored, etc)
/// composition of pdal::dimension::Flags
boost::uint32_t getFlags() const
{
return m_flags;
}
/// sets the dimension attribute flags (isValid, isRead, etc) of pdal::dimension::Flags
/// @param flags composited pdal::dimension::Flags
void setFlags(boost::uint32_t flags)
{
m_flags = flags;
}
/// @return is the dimension valid?
bool isValid() const
{
return (m_flags != dimension::Invalid);
}
/// @return should we read this dimension?
bool isRead() const
{
return (m_flags & dimension::IsRead) == dimension::IsRead;
}
/// @return should we write this dimension?
bool isWritten() const
{
return (m_flags & dimension::IsWritten) == dimension::IsWritten;
}
/// @return is this dimension ignored?
bool isIgnored() const
{
return (m_flags & dimension::IsIgnored) == dimension::IsIgnored;
}
/// @return Number of bytes required to serialize this dimension
inline dimension::size_type getByteSize() const
{
return m_byteSize;
}
/// @return a string description of the dimension
inline std::string getDescription() const
{
return m_description;
}
/// sets the string description for the dimension. Overrides whatever was
/// given in the constructor.
/// @param v string to use to set value
inline void setDescription(std::string const& v)
{
m_description = v;
}
/// @return the minimum value of this dimension as a double
inline double getMinimum() const
{
return m_min;
}
/*! Sets the minimum value of this dimension as a double.
\param max The minimum value for this dimension
\verbatim embed:rst
.. note::
The maximum and minimum values are simply data placeholders
and in most cases will be ``0.0``.
\endverbatim
*/
inline void setMinimum(double min)
{
m_min = min;
}
/// @return the maximum value of this dimension as a double.
inline double getMaximum() const
{
return m_max;
}
/*! Sets the maximum value of this dimension as a double.
\param max The maximum value for this dimension
\verbatim embed:rst
.. note::
The maximum and minimum values are simply data placeholders
and in most cases will be ``0.0``.
\endverbatim
*/
inline void setMaximum(double max)
{
m_max = max;
}
/// @return the numerical scale value for this dimension as a double. The
/// default value is \b 1.0
inline double getNumericScale() const
{
return m_numericScale;
}
/// Sets the numerical scale value for this dimension.
inline void setNumericScale(double v)
{
m_numericScale = v;
}
/// @return the numerical offset value for this dimension. The default value is \b 0.0.
inline double getNumericOffset() const
{
return m_numericOffset;
}
/// Sets the numerical offset value for this dimension.
inline void setNumericOffset(double v)
{
m_numericOffset = v;
}
/// Gets the endianness of this intance (defaults to little)
inline EndianType getEndianness() const
{
return m_endian;
}
/// Sets the endianness of this Dimension
/// \param v EndianType value to set for the dimension
inline void setEndianness(EndianType v)
{
m_endian = v;
}
/// @return the byte offset of the pdal::Dimension instance within the
/// context of a pdal::Schema. pdal::Schema will set this value when
/// adding the pdal::Dimension to itself so as to not require calculating
/// it for every lookup.
inline std::size_t getByteOffset() const
{
return m_byteOffset;
}
/// sets the byte offset of the pdal::Dimension
/// @param v the value to set
inline void setByteOffset(std::size_t v)
{
m_byteOffset = v;
}
/// @return the position of the pdal::Dimension within a pdal::Schema.
/// If the instance is not in a pdal::Schema instance, this value is
/// initialized to -1.
inline dimension::size_type getPosition() const
{
return m_position;
}
/// Sets the position of the pdal::Dimension instance within a pdal::Schema
inline void setPosition(dimension::size_type v)
{
m_position = v;
}
/// @name Summary and serialization
/// @return a boost::property_tree::ptree representation
/// of the pdal::Dimension instance
boost::property_tree::ptree toPTree() const;
/// Outputs a string representation of the Dimension instance to std::cout
void dump() const;
std::string getInterpretationName() const;
/// @name Identification
/// @return the pdal::dimension::id for the pdal::Dimension instance.
/// This value is the nil UUID by default.
inline dimension::id const& getUUID() const
{
return m_uuid;
}
/// sets the dimension::id from a string representation of the UUID.
/// @param id
void setUUID(std::string const& id);
/// sets the dimension::id from an existing dimension::id (copied)
inline void setUUID(dimension::id const& id)
{
m_uuid = id;
}
/// creates and sets the dimension::id for the instance
void createUUID();
/// denotes the parent relationship of this instance to another
/// with a given dimension::id
/// @param id the dimension::id of the parent dimension to this instance
inline void setParent(dimension::id const& id)
{
m_parentDimensionID = id;
}
/// @return the dimension::id of the parent dimension to this one.
inline dimension::id const& getParent() const
{
return m_parentDimensionID;
}
/// @name Namespaces
/// sets the namespace for this instance
/// @param name value to set. Typically this is a pdal::Stage::getName()
inline void setNamespace(std::string const& name)
{
m_namespace = name;
}
/// @return the namespace for this instance
inline std::string const& getNamespace() const
{
return m_namespace;
}
/// @return the fully qualified (namespace.name) name for this instance.
inline std::string getFQName() const
{
return m_namespace + "." + m_name;
}
/** @name Data Scaling
*/
/// Applies the scale and offset values from the dimension to a the given value
/// @param v The value of type T to scale.
/// @return v scaled by getNumericOffset() and getNumericScale() values.
/*! \verbatim embed:rst
.. note::
The value ``v`` is casted to a double before math is applied.
\endverbatim
*/
template<class T>
inline double applyScaling(T const& v) const
{
return static_cast<double>(v) * m_numericScale + m_numericOffset;
}
/// Removes the scale and offset values from an imprecise double value
/// @param v The value to descale
/// @return a value that has been descaled by the Dimension's getNumericOffset and getNumericScale values
/*! \verbatim embed:rst
.. warning::
If the value will overflow the datatype ``T`` that is given,
an std::out_of_range exception will be thrown.
\endverbatim
*/
template<class T>
inline T removeScaling(double const& v) const
{
T output = static_cast<T>(Utils::sround((v - m_numericOffset)/ m_numericScale));
if (std::numeric_limits<T>::is_exact) //
{
if (output > (std::numeric_limits<T>::max)())
{
std::ostringstream oss;
oss << "filter.Scaling: scale and/or offset combination causes "
"re-scaled value to be greater than std::numeric_limits::max for dimension '" << getName() << "'. " <<
"value is: " << output << " and max() is: " << (std::numeric_limits<T>::max)();
}
else if (output < (std::numeric_limits<T>::min)())
{
std::ostringstream oss;
oss << "filter.Scaling: scale and/or offset combination causes "
"re-scaled value to be less than std::numeric_limits::min for dimension '" << getName() << "'. " <<
"value is: " << output << " and min() is: " << (std::numeric_limits<T>::min)();
throw std::out_of_range(oss.str());
}
}
return output;
}
static dimension::Interpretation getInterpretation(std::string const& interpretation_name);
template <class T>
inline T convert(void* data) const
{
T output(0);
float flt(0.0);
double dbl(0.0);
boost::int8_t i8(0);
boost::uint8_t u8(0);
boost::int16_t i16(0);
boost::uint16_t u16(0);
boost::int32_t i32(0);
boost::uint32_t u32(0);
boost::int64_t i64(0);
boost::uint64_t u64(0);
switch (this->getInterpretation())
{
case dimension::SignedByte:
i8 = *(boost::int8_t*)(void*)data;
output = Utils::saturation_cast<T, boost::int8_t>(i8);
break;
case dimension::UnsignedByte:
u8 = *(boost::uint8_t*)(void*)data;
output = Utils::saturation_cast<T, boost::uint8_t>(u8);
break;
case dimension::SignedInteger:
if (this->getByteSize() == 1)
{
i8 = *(boost::int8_t*)(void*)data;
output = Utils::saturation_cast<T, boost::int8_t>(i8);
}
else if (this->getByteSize() == 2)
{
i16 = *(boost::int16_t*)(void*)data;
output = Utils::saturation_cast<T, boost::int16_t>(i16);
}
else if (this->getByteSize() == 4)
{
i32 = *(boost::int32_t*)(void*)data;
output = Utils::saturation_cast<T, boost::int32_t>(i32);
}
else if (this->getByteSize() == 8)
{
i64 = *(boost::int64_t*)(void*)data;
output = Utils::saturation_cast<T, boost::int64_t>(i64);
}
else
{
throw buffer_error("getField::Unhandled datatype size for SignedInteger");
}
break;
case dimension::UnsignedInteger:
if (this->getByteSize() == 1)
{
u8 = *(boost::uint8_t*)(void*)data;
output = Utils::saturation_cast<T, boost::uint8_t>(u8);
}
else if (this->getByteSize() == 2)
{
u16 = *(boost::uint16_t*)(void*)data;
output = Utils::saturation_cast<T, boost::uint16_t>(u16);
}
else if (this->getByteSize() == 4)
{
u32 = *(boost::uint32_t*)(void*)data;
output = Utils::saturation_cast<T, boost::uint32_t>(u32);
}
else if (this->getByteSize() == 8)
{
u64 = *(boost::uint64_t*)(void*)data;
output = Utils::saturation_cast<T, boost::uint64_t>(u64);
}
else
{
throw buffer_error("getField::Unhandled datatype size for UnsignedInteger");
}
break;
case dimension::Float:
if (this->getByteSize() == 4)
{
flt = *(float*)(void*)data;
output = Utils::saturation_cast<T, float>(flt);
}
else if (this->getByteSize() == 8)
{
dbl = *(double*)(void*)data;
output = Utils::saturation_cast<T, double>(dbl);
}
else
{
throw buffer_error("getField::Unhandled datatype size for Float");
}
break;
case dimension::Pointer:
break;
default:
throw buffer_error("Undefined interpretation for getField");
}
return output;
}
/// @name Private Attributes
private:
std::string m_name;
boost::uint32_t m_flags;
EndianType m_endian;
dimension::size_type m_byteSize;
std::string m_description;
double m_min;
double m_max;
double m_numericScale;
double m_numericOffset;
dimension::size_type m_byteOffset;
dimension::size_type m_position;
dimension::Interpretation m_interpretation;
dimension::id m_uuid;
std::string m_namespace;
dimension::id m_parentDimensionID;
};
PDAL_DLL std::ostream& operator<<(std::ostream& os, pdal::Dimension const& d);
} // namespace pdal
#ifdef PDAL_COMPILER_MSVC
# pragma warning(pop)
#endif
#endif // PDAL_DIMENSION_HPP_INCLUDED