Shape, Cloneable
QuadCurve2D.Double, QuadCurve2D.Float
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.
Nested Classes
static class
A quadratic parametric curve segment specified with double coordinates.
static class
A quadratic parametric curve segment specified with float coordinates.
Constructors
protected
This is an abstract class that cannot be instantiated directly.
Creates a new object of the same class and with the same contents as this object.
boolean
Tests if the specified coordinates are inside the boundary of the
Shape
, as described by the
definition of insideness.
boolean
contains(double x, double y, double w, double h)
Tests if the interior of the Shape entirely contains the specified rectangular area.
boolean
boolean
Tests if the interior of the Shape entirely contains the specified Rectangle2D.
Returns an integer
Rectangle
that completely encloses the
Shape
.
Returns a high precision and more accurate bounding box of the Shape than the getBounds method.
Returns the control point.
abstract double
Returns the X coordinate of the control point in double precision.
abstract double
Returns the Y coordinate of the control point in double precision.
double
Returns the flatness, or maximum distance of a control point from the line connecting the end points, of this QuadCurve2D.
static double
Returns the flatness, or maximum distance of a control point from the line connecting the end points, of the quadratic curve specified by the control points stored in the indicated array at the indicated index.
static double
getFlatness(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
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.
double
Returns the square of the flatness, or maximum distance of a control point from the line connecting the end points, of this QuadCurve2D.
static double
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 control points stored in the indicated array at the indicated index.
static double
getFlatnessSq(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
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.
Returns an iteration object that defines the boundary of the shape of this QuadCurve2D.
Returns an iteration object that defines the boundary of the flattened shape of this QuadCurve2D.
abstract double
Returns the X coordinate of the start point in double in precision.
abstract double
Returns the X coordinate of the end point in double precision.
abstract double
Returns the Y coordinate of the start point in double precision.
abstract double
Returns the Y coordinate of the end point in double precision.
boolean
intersects(double x, double y, double w, double h)
Tests if the interior of the Shape intersects the interior of a specified rectangular area.
boolean
Tests if the interior of the Shape intersects the interior of a specified Rectangle2D.
void
Sets the location of the end points and control points of this QuadCurve2D to the double coordinates at the specified offset in the specified array.
abstract void
setCurve(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
Sets the location of the end points and control point of this curve to the specified double coordinates.
void
Sets the location of the end points and control points of this QuadCurve2D to the coordinates of the Point2D objects at the specified offset in the specified array.
void
Sets the location of the end points and control point of this QuadCurve2D to the specified Point2D coordinates.
void
Sets the location of the end points and control point of this QuadCurve2D to the same as those in the specified QuadCurve2D.
static int
Solves the quadratic whose coefficients are in the eqn array and places the non-complex roots back into the same array, returning the number of roots.
static int
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.
static void
subdivide(double[] src, int srcoff, double[] left, int leftoff, double[] right, int 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.
void
Subdivides this QuadCurve2D and stores the resulting two subdivided curves into the left and right curve parameters.
static void
Subdivides the quadratic curve specified by the src parameter and stores the resulting two subdivided curves into the left and right curve parameters.
protected QuadCurve2D()
This is an abstract class that cannot be instantiated directly. Type-specific implementation subclasses are available for instantiation and provide a number of formats for storing the information necessary to satisfy the various accessor methods below.
public abstract double getX1()
Returns the X coordinate of the start point in double in precision.
public abstract double getY1()
Returns the Y coordinate of the start point in double precision.
Returns the start point.
Point2D that is the start point of this QuadCurve2D.
public abstract double getCtrlX()
Returns the X coordinate of the control point in double precision.
public abstract double getCtrlY()
Returns the Y coordinate of the control point in double precision.
()
Returns the control point.
Point2D that is the control point of this Point2D.
public abstract double getX2()
Returns the X coordinate of the end point in double precision.
public abstract double getY2()
Returns the Y coordinate of the end point in double precision.
Returns the end point.
Point object that is the end point of this Point2D.
public abstract void setCurve(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
Sets the location of the end points and control point of this curve to the specified double coordinates.
x1 - the X coordinate of the start point
y1 - the Y coordinate of the start point
ctrlx - the X coordinate of the control point
ctrly - the Y coordinate of the control point
x2 - the X coordinate of the end point
y2 - the Y coordinate of the end point
public void setCurve(double[] coords, int offset)
Sets the location of the end points and control points of this QuadCurve2D to the double coordinates at the specified offset in the specified array.
coords - the array containing coordinate values
offset - the index into the array from which to start getting the coordinate values and assigning them to this QuadCurve2D
Sets the location of the end points and control point of this QuadCurve2D to the specified Point2D coordinates.
p1 - the start point
cp - the control point
p2 - the end point
Sets the location of the end points and control points of this QuadCurve2D to the coordinates of the Point2D objects at the specified offset in the specified array.
pts - an array containing Point2D that define coordinate values
offset - the index into pts from which to start getting the coordinate values and assigning them to this QuadCurve2D
Sets the location of the end points and control point of this QuadCurve2D to the same as those in the specified QuadCurve2D.
c - the specified QuadCurve2D
public static double getFlatnessSq(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
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.
x1 - the X coordinate of the start point
y1 - the Y coordinate of the start point
ctrlx - the X coordinate of the control point
ctrly - the Y coordinate of the control point
x2 - the X coordinate of the end point
y2 - the Y coordinate of the end point
public static double getFlatness(double x1, double y1, double ctrlx, double ctrly, double x2, double y2)
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.
x1 - the X coordinate of the start point
y1 - the Y coordinate of the start point
ctrlx - the X coordinate of the control point
ctrly - the Y coordinate of the control point
x2 - the X coordinate of the end point
y2 - the Y coordinate of the end point
public static double getFlatnessSq(double[] coords, int offset)
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 control points stored in the indicated array at the indicated index.
coords - an array containing coordinate values
offset - the index into coords from which to to start getting the values from the array
public static double getFlatness(double[] coords, int offset)
Returns the flatness, or maximum distance of a control point from the line connecting the end points, of the quadratic curve specified by the control points stored in the indicated array at the indicated index.
coords - an array containing coordinate values
offset - the index into coords from which to start getting the coordinate values
public double getFlatnessSq()
Returns the square of the flatness, or maximum distance of a control point from the line connecting the end points, of this QuadCurve2D.
QuadCurve2D.
public double getFlatness()
Returns the flatness, or maximum distance of a control point from the line connecting the end points, of this QuadCurve2D.
QuadCurve2D.
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
right - the QuadCurve2D object for storing the right or second half of the subdivided curve
Subdivides the quadratic curve specified by the src parameter 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 the src object or null.
src - the quadratic curve to be subdivided
left - the QuadCurve2D object for storing the left or first half of the subdivided curve
right - the QuadCurve2D object for storing the right or second half of the subdivided curve
public static void subdivide(double[] src, int srcoff, double[] left, int leftoff, double[] right, int 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
srcoff - the offset into the array of the beginning of the the 6 source coordinates
left - the array for storing the coordinates for the first half of the subdivided curve
leftoff - the offset into the array of the beginning of the the 6 left coordinates
right - the array for storing the coordinates for the second half of the subdivided curve
rightoff - the offset into the array of the beginning of the the 6 right coordinates
public static int solveQuadratic(double[] eqn)
Solves the quadratic whose coefficients are in the
eqn
array and places the non-complex roots back into the same 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 array that contains the quadratic coefficients
-1 if the equation is a constant
public static int solveQuadratic(double[] eqn, double[] 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
res - the array that contains the non-complex roots resulting from the solution of the quadratic equation
-1 if the equation is a constant.
public boolean contains(double x, double y)
Tests if the specified coordinates are inside the boundary of the
Shape
, as described by the
definition of insideness.
public boolean intersects(double x, double y, double w, double 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:
Shape intersect, butThis 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.
intersects in interface Shape
x - the X coordinate of the upper-left corner of the specified rectangular area
y - the Y coordinate of the upper-left corner of the specified rectangular area
w - the width of the specified rectangular area
h - the height of the specified rectangular area
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.
Tests if the interior of the
Shape
intersects the interior of a specified
Rectangle2D
. The
Shape.intersects()
method allows a
Shape
implementation to conservatively return
true
when:
Rectangle2D and the Shape intersect, butThis means that for some
Shapes
this method might return
true
even though the
Rectangle2D
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.
intersects in interface Shape
r - the specified Rectangle2D
true if the interior of the Shape and the interior of the specified Rectangle2D intersect, or are both highly likely to intersect and intersection calculations would be too expensive to perform; false otherwise.
public boolean contains(double x, double y, double w, double 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:
intersect method returns true andShape 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.
contains in interface Shape
x - the X coordinate of the upper-left corner of the specified rectangular area
y - the Y coordinate of the upper-left corner of the specified rectangular area
w - the width of the specified rectangular area
h - the height of the specified rectangular area
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.
Tests if the interior of the
Shape
entirely contains the specified
Rectangle2D
. The
Shape.contains()
method allows a
Shape
implementation to conservatively return
false
when:
intersect method returns true andShape entirely contains the Rectangle2D are prohibitively expensive.This means that for some
Shapes
this method might return
false
even though the
Shape
contains the
Rectangle2D
. The
Area
class performs more accurate geometric computations than most
Shape
objects and therefore can be used if a more precise answer is required.
contains in interface Shape
r - The specified Rectangle2D
true if the interior of the Shape entirely contains the Rectangle2D; false otherwise or, if the Shape contains the Rectangle2D and the intersects method returns true and the containment calculations would be too expensive to perform.
Returns a high precision and more accurate bounding box of the
Shape
than the
getBounds
method. Note that there is no guarantee that the returned
Rectangle2D
is the smallest bounding box that encloses the
Shape
, only that the
Shape
lies entirely within the indicated
Rectangle2D
. The bounding box returned by this method is usually tighter than that returned by the
getBounds
method and never fails due to overflow problems since the return value can be an instance of the
Rectangle2D
that uses double precision values to store the dimensions.
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 Rectangle2D bounds object according to the contains(point) method of the bounds. Specifically:
shape.contains(p) requires bounds.contains(p)
If a point is not inside the shape, then it might still be contained in the bounds object:
bounds.contains(p) does not imply shape.contains(p)
getBounds2D in interface Shape
Rectangle2D that is a high-precision bounding box of the Shape.
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 iteration object that defines the boundary of the 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.
getPathIterator in interface Shape
at - an optional AffineTransform to apply to the shape boundary
PathIterator object that defines the boundary of the shape.
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.
getPathIterator in interface Shape
at - an optional AffineTransform to apply to the boundary of the shape
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.
PathIterator object that defines the flattened boundary of the shape.
Creates a new object of the same class and with the same contents as this object.
clone in class Object
OutOfMemoryError - if there is not enough memory.
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4