jdk.awt.geom.QuadCurve2D — clojure-interop/java.awt 1.0.5

The QuadCurve2D class defines a quadratic parametric curve segment in (x,y) coordinate space.

This class is only the abstract superclass for all objects that store a 2D quadratic curve segment. The actual storage representation of the coordinates is left to the subclass.

*get-flatness clj

(*get-flatness coords offset)

(*get-flatness x-1 y-1 ctrlx ctrly x-2 y-2)

Returns the flatness, or maximum distance of a control point from the line connecting the end points, of the quadratic curve specified by the indicated control points.

x-1 - the X coordinate of the start point - double y-1 - the Y coordinate of the start point - double ctrlx - the X coordinate of the control point - double ctrly - the Y coordinate of the control point - double x-2 - the X coordinate of the end point - double y-2 - the Y coordinate of the end point - double

returns: the flatness of the quadratic curve defined by the specified coordinates. - double

*get-flatness-sq clj

(*get-flatness-sq coords offset)

(*get-flatness-sq x-1 y-1 ctrlx ctrly x-2 y-2)

Returns the square of the flatness, or maximum distance of a control point from the line connecting the end points, of the quadratic curve specified by the indicated control points.

x-1 - the X coordinate of the start point - double y-1 - the Y coordinate of the start point - double ctrlx - the X coordinate of the control point - double ctrly - the Y coordinate of the control point - double x-2 - the X coordinate of the end point - double y-2 - the Y coordinate of the end point - double

returns: the square of the flatness of the quadratic curve defined by the specified coordinates. - double

*solve-quadratic clj

(*solve-quadratic eqn)

(*solve-quadratic eqn res)

Solves the quadratic whose coefficients are in the eqn array and places the non-complex roots into the res array, returning the number of roots. The quadratic solved is represented by the equation:

 eqn = {C, B, A};
 ax^2  bx  c = 0

A return value of -1 is used to distinguish a constant equation, which might be always 0 or never 0, from an equation that has no zeroes.

eqn - the specified array of coefficients to use to solve the quadratic equation - double[] res - the array that contains the non-complex roots resulting from the solution of the quadratic equation - double[]

returns: the number of roots, or -1 if the equation is a constant. - int

*subdivide clj

(*subdivide src left right)

(*subdivide src srcoff left leftoff right rightoff)

Subdivides the quadratic curve specified by the coordinates stored in the src array at indices srcoff through srcoff 5 and stores the resulting two subdivided curves into the two result arrays at the corresponding indices. Either or both of the left and right arrays can be null or a reference to the same array and offset as the src array. Note that the last point in the first subdivided curve is the same as the first point in the second subdivided curve. Thus, it is possible to pass the same array for left and right and to use offsets such that rightoff equals leftoff 4 in order to avoid allocating extra storage for this common point.

src - the array holding the coordinates for the source curve - double[] srcoff - the offset into the array of the beginning of the the 6 source coordinates - int left - the array for storing the coordinates for the first half of the subdivided curve - double[] leftoff - the offset into the array of the beginning of the the 6 left coordinates - int right - the array for storing the coordinates for the second half of the subdivided curve - double[] rightoff - the offset into the array of the beginning of the the 6 right coordinates - int

clone clj

(clone this)

Creates a new object of the same class and with the same contents as this object.

returns: a clone of this instance. - java.lang.Object

throws: java.lang.OutOfMemoryError - if there is not enough memory.

contains clj

(contains this p)

(contains this x y)

(contains this x y w h)

Tests if the interior of the Shape entirely contains the specified rectangular area. All coordinates that lie inside the rectangular area must lie within the Shape for the entire rectangular area to be considered contained within the Shape.

The Shape.contains() method allows a Shape implementation to conservatively return false when:

the intersect method returns true and

the calculations to determine whether or not the Shape entirely contains the rectangular area are prohibitively expensive.

This means that for some Shapes this method might return false even though the Shape contains the rectangular area. The Area class performs more accurate geometric computations than most Shape objects and therefore can be used if a more precise answer is required.

x - the X coordinate of the upper-left corner of the specified rectangular area - double y - the Y coordinate of the upper-left corner of the specified rectangular area - double w - the width of the specified rectangular area - double h - the height of the specified rectangular area - double

returns: true if the interior of the Shape entirely contains the specified rectangular area; false otherwise or, if the Shape contains the rectangular area and the intersects method returns true and the containment calculations would be too expensive to perform. - boolean

get-bounds clj

(get-bounds this)

Returns an integer Rectangle that completely encloses the Shape. Note that there is no guarantee that the returned Rectangle is the smallest bounding box that encloses the Shape, only that the Shape lies entirely within the indicated Rectangle. The returned Rectangle might also fail to completely enclose the Shape if the Shape overflows the limited range of the integer data type. The getBounds2D method generally returns a tighter bounding box due to its greater flexibility in representation.

Note that the definition of insideness can lead to situations where points on the defining outline of the shape may not be considered contained in the returned bounds object, but only in cases where those points are also not considered contained in the original shape.

If a point is inside the shape according to the contains(point) method, then it must be inside the returned Rectangle bounds object according to the contains(point) method of the bounds. Specifically:

shape.contains(x,y) requires bounds.contains(x,y)

If a point is not inside the shape, then it might still be contained in the bounds object:

bounds.contains(x,y) does not imply shape.contains(x,y)

returns: an integer Rectangle that completely encloses the Shape. - java.awt.Rectangle

get-ctrl-pt clj

(get-ctrl-pt this)

Returns the control point.

returns: a Point2D that is the control point of this Point2D. - java.awt.geom.Point2D

get-ctrl-x clj

(get-ctrl-x this)

Returns the X coordinate of the control point in double precision.

returns: X coordinate the control point - double

get-ctrl-y clj

(get-ctrl-y this)

Returns the Y coordinate of the control point in double precision.

returns: the Y coordinate of the control point. - double

get-flatness clj

(get-flatness this)

Returns the flatness, or maximum distance of a control point from the line connecting the end points, of this QuadCurve2D.

returns: the flatness of this QuadCurve2D. - double

get-flatness-sq clj

(get-flatness-sq this)

Returns the square of the flatness, or maximum distance of a control point from the line connecting the end points, of this QuadCurve2D.

returns: the square of the flatness of this QuadCurve2D. - double

get-p-1 clj

(get-p-1 this)

Returns the start point.

returns: a Point2D that is the start point of this QuadCurve2D. - java.awt.geom.Point2D

get-p-2 clj

(get-p-2 this)

Returns the end point.

returns: a Point object that is the end point of this Point2D. - java.awt.geom.Point2D

get-path-iterator clj

(get-path-iterator this at)

(get-path-iterator this at flatness)

Returns an iteration object that defines the boundary of the flattened shape of this QuadCurve2D. The iterator for this class is not multi-threaded safe, which means that this QuadCurve2D class does not guarantee that modifications to the geometry of this QuadCurve2D object do not affect any iterations of that geometry that are already in process.

at - an optional AffineTransform to apply to the boundary of the shape - java.awt.geom.AffineTransform flatness - the maximum distance that the control points for a subdivided curve can be with respect to a line connecting the end points of this curve before this curve is replaced by a straight line connecting the end points. - double

returns: a PathIterator object that defines the flattened boundary of the shape. - java.awt.geom.PathIterator

get-x-1 clj

(get-x-1 this)

Returns the X coordinate of the start point in double in precision.

returns: the X coordinate of the start point. - double

get-x-2 clj

(get-x-2 this)

Returns the X coordinate of the end point in double precision.

returns: the x coordinate of the end point. - double

get-y-1 clj

(get-y-1 this)

Returns the Y coordinate of the start point in double precision.

returns: the Y coordinate of the start point. - double

get-y-2 clj

(get-y-2 this)

Returns the Y coordinate of the end point in double precision.

returns: the Y coordinate of the end point. - double

intersects clj

(intersects this r)

(intersects this x y w h)

Tests if the interior of the Shape intersects the interior of a specified rectangular area. The rectangular area is considered to intersect the Shape if any point is contained in both the interior of the Shape and the specified rectangular area.

The Shape.intersects() method allows a Shape implementation to conservatively return true when:

there is a high probability that the rectangular area and the Shape intersect, but

the calculations to accurately determine this intersection are prohibitively expensive.

This means that for some Shapes this method might return true even though the rectangular area does not intersect the Shape. The Area class performs more accurate computations of geometric intersection than most Shape objects and therefore can be used if a more precise answer is required.

x - the X coordinate of the upper-left corner of the specified rectangular area - double y - the Y coordinate of the upper-left corner of the specified rectangular area - double w - the width of the specified rectangular area - double h - the height of the specified rectangular area - double

returns: true if the interior of the Shape and the interior of the rectangular area intersect, or are both highly likely to intersect and intersection calculations would be too expensive to perform; false otherwise. - boolean

set-curve clj

(set-curve this c)

(set-curve this coords offset)

(set-curve this p-1 cp p-2)

(set-curve this x-1 y-1 ctrlx ctrly x-2 y-2)

Sets the location of the end points and control point of this curve to the specified double coordinates.

x-1 - the X coordinate of the start point - double y-1 - the Y coordinate of the start point - double ctrlx - the X coordinate of the control point - double ctrly - the Y coordinate of the control point - double x-2 - the X coordinate of the end point - double y-2 - the Y coordinate of the end point - double

subdivide clj

(subdivide this left right)

Subdivides this QuadCurve2D and stores the resulting two subdivided curves into the left and right curve parameters. Either or both of the left and right objects can be the same as this QuadCurve2D or null.

left - the QuadCurve2D object for storing the left or first half of the subdivided curve - java.awt.geom.QuadCurve2D right - the QuadCurve2D object for storing the right or second half of the subdivided curve - java.awt.geom.QuadCurve2D