Geometry handling functions: DynamicLine handling. More...

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Functions
GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaAllocDynamicLine (void)
	Creates a new dynamicly growing line/ring object. More...

GAIAGEO_DECLARE void	gaiaFreeDynamicLine (gaiaDynamicLinePtr p)
	Destroys a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaAppendPointToDynamicLine (gaiaDynamicLinePtr p, double x, double y)
	Appends a new 2D Point [XY] at the end of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaAppendPointZToDynamicLine (gaiaDynamicLinePtr p, double x, double y, double z)
	Appends a new 3D Point [XYZ] at the end of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaAppendPointMToDynamicLine (gaiaDynamicLinePtr p, double x, double y, double m)
	Appends a new 2D Point [XYM] at the end of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaAppendPointZMToDynamicLine (gaiaDynamicLinePtr p, double x, double y, double z, double m)
	Appends a new 3D Point [XYZM] at the end of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaPrependPointToDynamicLine (gaiaDynamicLinePtr p, double x, double y)
	Appends a new 2D Point [XY] before the first one of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaPrependPointZToDynamicLine (gaiaDynamicLinePtr p, double x, double y, double z)
	Appends a new 3D Point [XYZ] before the first one of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaPrependPointMToDynamicLine (gaiaDynamicLinePtr p, double x, double y, double m)
	Appends a new 2D Point [XYM] before the first one of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaPrependPointZMToDynamicLine (gaiaDynamicLinePtr p, double x, double y, double z, double m)
	Appends a new 3D Point [XYZM] before the first one of a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaDynamicLineInsertAfter (gaiaDynamicLinePtr p, gaiaPointPtr pt, double x, double y)
	Appends a new 2D Point [XY] immediately after the given Point into a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaDynamicLineInsertBefore (gaiaDynamicLinePtr p, gaiaPointPtr pt, double x, double y)
	Appends a new 2D Point [XY] immediately before the given Point into a dynamically growing line/ring object. More...

GAIAGEO_DECLARE void	gaiaDynamicLineDeletePoint (gaiaDynamicLinePtr p, gaiaPointPtr pt)
	Removes a given Point from a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaCloneDynamicLine (gaiaDynamicLinePtr org)
	Duplicates a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaReverseDynamicLine (gaiaDynamicLinePtr org)
	Duplicates and reverts a dynamically growing line/ring object. More...

GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaDynamicLineSplitBefore (gaiaDynamicLinePtr org, gaiaPointPtr point)
	Cuts a dynamically growing line/ring in two halves, using a given cut point. More...

GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaDynamicLineSplitAfter (gaiaDynamicLinePtr org, gaiaPointPtr point)
	Cuts a dynamically growing line/ring in two halves, using a given cut point. More...

GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaDynamicLineJoinAfter (gaiaDynamicLinePtr org, gaiaPointPtr point, gaiaDynamicLinePtr toJoin)
	Merges two dynamically growing line/ring object into a single one. More...

GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaDynamicLineJoinBefore (gaiaDynamicLinePtr org, gaiaPointPtr point, gaiaDynamicLinePtr toJoin)
	Merges two dynamically growing line/ring object into a single one. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaDynamicLineFindByCoords (gaiaDynamicLinePtr p, double x, double y)
	Finds a Point within a dymically growing line/ring object [by coords]. More...

GAIAGEO_DECLARE gaiaPointPtr	gaiaDynamicLineFindByPos (gaiaDynamicLinePtr p, int pos)
	Finds a Point within a dymically growing line/ring object [by position]. More...

GAIAGEO_DECLARE gaiaDynamicLinePtr	gaiaCreateDynamicLine (double *coords, int points)
	Creates a new dynamicly growing line/ring object. More...

Detailed Description

Geometry handling functions: DynamicLine handling.

Function Documentation

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaAllocDynamicLine ( void )

Creates a new dynamicly growing line/ring object.

Returns: the pointer to newly created object

See also: gaiaCreateDynamicLine, gaiaFreeDynamicLine

Note: you are responsible to destroy (before or after) any allocated dynamically growing line/ring object.

GAIAGEO_DECLARE gaiaPointPtr gaiaAppendPointMToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y,
		double	m
	)

Appends a new 2D Point [XYM] at the end of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point
m	M measure of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaPointPtr gaiaAppendPointToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y
	)

Appends a new 2D Point [XY] at the end of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaPointPtr gaiaAppendPointZMToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y,
		double	z,
		double	m
	)

Appends a new 3D Point [XYZM] at the end of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point
z	Z coordinate of the Point
m	M measure of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaPointPtr gaiaAppendPointZToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y,
		double	z
	)

Appends a new 3D Point [XYZ] at the end of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point
z	Z coordinate of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaCloneDynamicLine ( gaiaDynamicLinePtr org )

Duplicates a dynamically growing line/ring object.

Parameters

org	pointer to dynamically growing line/ring object [origin].

Returns: the pointer to newly created dynamic growing line/ring object: NULL on failure.

Note: the newly created object is an exact copy of the original one.

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaCreateDynamicLine	(	double *	coords,
		int	points
	)

Creates a new dynamicly growing line/ring object.

Parameters

coords	an array of COORDs, any dimension [XY, XYZ, XYM, XYZM]
points	number of points [aka vertices] into the array

Returns: the pointer to newly created object

See also: gaiaAllocDynamicLine, gaiaFreeDynamicLine, gaiaLinestringStruct, gaiaRingStruct

Note: you are responsible to destroy (before or after) any allocated dynamically growing line/ring object.
The COORDs array is usually expected to be one found within a gaiaLinestring or gaiaRing object.

GAIAGEO_DECLARE void gaiaDynamicLineDeletePoint	(	gaiaDynamicLinePtr	p,
		gaiaPointPtr	pt
	)

Removes a given Point from a dynamically growing line/ring object.

Parameters

p	pointer to dynamically growing line/ring object.
pt	pointer to given Point.

Note: the given Point (referenced by its address) will be removed from the dynamically growin line/ring object.
the given Point will be then implicitly destroyed.

GAIAGEO_DECLARE gaiaPointPtr gaiaDynamicLineFindByCoords	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y
	)

Finds a Point within a dymically growing line/ring object [by coords].

Parameters

p	pointer to dymamically line/ring object.
x	Point X coordinate.
y	Point Y coordinate.

Returns: the pointer to the corresponding Point object: NULL on failure.

See also: gaiaDynamicLineFindByPos

Note: if the line object contains more Points sharing the same coordinates, a reference to the first one found will be returned.

GAIAGEO_DECLARE gaiaPointPtr gaiaDynamicLineFindByPos	(	gaiaDynamicLinePtr	p,
		int	pos
	)

Finds a Point within a dymically growing line/ring object [by position].

Parameters

p	pointer to dymamically line/ring object.
pos	relative position [first Point has index 0].

Returns: the pointer to the corresponding Point object: NULL on failure.

See also: gaiaDynamicLineFindByCoords

GAIAGEO_DECLARE gaiaPointPtr gaiaDynamicLineInsertAfter	(	gaiaDynamicLinePtr	p,
		gaiaPointPtr	pt,
		double	x,
		double	y
	)

Appends a new 2D Point [XY] immediately after the given Point into a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
pt	pointer to the given Point.
x	X coordinate of the Point to be appended
y	Y coordinate of the Point to be appended

See also: gaiaDynamicLiceInsertBefore

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaPointPtr gaiaDynamicLineInsertBefore	(	gaiaDynamicLinePtr	p,
		gaiaPointPtr	pt,
		double	x,
		double	y
	)

Appends a new 2D Point [XY] immediately before the given Point into a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
pt	pointer to the given Point.
x	X coordinate of the Point to be appended
y	Y coordinate of the Point to be appended

See also: gaiaDynamicLiceInsertBeforeAfter

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaDynamicLineJoinAfter	(	gaiaDynamicLinePtr	org,
		gaiaPointPtr	point,
		gaiaDynamicLinePtr	toJoin
	)

Merges two dynamically growing line/ring object into a single one.

Parameters

org	pointer to the first input object [first line].
point	pointer to the reference Point object.
toJoin	pointer to the second input object [second line].

Returns: the pointer to newly created dynamically growing line/ring object [merged line]: NULL on failure.

See also: gaiaDynamicLineJoinBefore

Note: the reference Point must exists into the first line: the second line will then be inserted immediately after the reference Point.
The newly created object will represent the resulting merged line:
both input objects remain untouched.

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaDynamicLineJoinBefore	(	gaiaDynamicLinePtr	org,
		gaiaPointPtr	point,
		gaiaDynamicLinePtr	toJoin
	)

Merges two dynamically growing line/ring object into a single one.

Parameters

org	pointer to the first input object [first line].
point	pointer to the reference Point object.
toJoin	pointer to the second input object [second line].

Returns: the pointer to newly created dynamically growing line/ring object [merged line]: NULL on failure.

See also: gaiaDynamicLineJoinAfter

Note: the reference Point must exists into the first line: the second line will then be inserted immediately before the reference Point.
The newly created object will represent the resulting merged line:
both input objects remain untouched.

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaDynamicLineSplitAfter	(	gaiaDynamicLinePtr	org,
		gaiaPointPtr	point
	)

Cuts a dynamically growing line/ring in two halves, using a given cut point.

Parameters

org	pointer to the input object [the line to be split].
point	pointer to given cut point.

Returns: the pointer to newly created dynamic growing line/ring object: NULL on failure.

See also: gaiaDynamicLineSplitBefore

Note: the newly created object will contain a line going from the orginal first point to the cut point [included].
on completion the orginal line will be reduced, going from the cut point [excluded] to the original last point.

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaDynamicLineSplitBefore	(	gaiaDynamicLinePtr	org,
		gaiaPointPtr	point
	)

Cuts a dynamically growing line/ring in two halves, using a given cut point.

Parameters

org	pointer to the input object [the line to be split].
point	pointer to given cut point.

Returns: the pointer to newly created dynamic growing line/ring object: NULL on failure.

See also: gaiaDynamicLineSplitAfter

Note: the newly created object will contain a line going from the orginal first point to the cut point [excluded].
on completion the orginal line will be reduced, going from the cut point [included] to the original last point.

GAIAGEO_DECLARE void gaiaFreeDynamicLine ( gaiaDynamicLinePtr p )

Destroys a dynamically growing line/ring object.

Parameters

p	pointer to object to be destroyed

See also: gaiaAllocDynamicLine

GAIAGEO_DECLARE gaiaPointPtr gaiaPrependPointMToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y,
		double	m
	)

Appends a new 2D Point [XYM] before the first one of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point
m	M measure of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaPointPtr gaiaPrependPointToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y
	)

Appends a new 2D Point [XY] before the first one of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaPointPtr gaiaPrependPointZMToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y,
		double	z,
		double	m
	)

Appends a new 3D Point [XYZM] before the first one of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point
z	Z coordinate of the Point
m	M measure of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaPointPtr gaiaPrependPointZToDynamicLine	(	gaiaDynamicLinePtr	p,
		double	x,
		double	y,
		double	z
	)

Appends a new 3D Point [XYZ] before the first one of a dynamically growing line/ring object.

Parameters

p	pointer to the dynamically growing line/ring object.
x	X coordinate of the Point
y	Y coordinate of the Point
z	Z coordinate of the Point

Returns: the pointer to newly created Point

GAIAGEO_DECLARE gaiaDynamicLinePtr gaiaReverseDynamicLine ( gaiaDynamicLinePtr org )

Duplicates and reverts a dynamically growing line/ring object.

Parameters

org	pointer to dynamically growing line/ring object [origin].

Returns: the pointer to newly created dynamic growing line/ring object: NULL on failure.

Note: the newly created object is an exact copy of the origina one, except in that direction is reverted.
i.e. first inpunt point becomes last output point, and last input point becomes first output point.

Functions

Detailed Description

Function Documentation