Class Star2D
- All Implemented Interfaces:
Shape
This class provides a star shape. A star is defined by two radii and a number of branches. Each branch spans between the two radii. The inner radius is the distance between the center of the star and the origin of the branches. The outer radius is the distance between the center of the star and the tips of the branches.
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate int
private double
private double
private Shape
private double
private double
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Constructor Summary
ConstructorsConstructorDescriptionStar2D
(double x, double y, double innerRadius, double outerRadius, int branchesCount) Creates a new star whose center is located at the specifiedx
andy
coordinates. -
Method Summary
Modifier and TypeMethodDescriptionboolean
contains
(double x, double y) boolean
contains
(double x, double y, double w, double h) boolean
boolean
private static Shape
generateStar
(double x, double y, double innerRadius, double outerRadius, int branchesCount) int
Returns the number of branches of the star.double
Returns the distance between the center of the star and the origin of the branches.double
Returns the distance between the center of the star and the tips of the branches.getPathIterator
(AffineTransform at, double flatness) double
getX()
Returns the location of the center of star.double
getY()
Returns the location of the center of star.boolean
intersects
(double x, double y, double w, double h) boolean
void
setBranchesCount
(int branchesCount) Sets the number branches of the star.void
setInnerRadius
(double innerRadius) Sets the inner radius of the star, that is the distance between its center and the origin of the branches.void
setOuterRadius
(double outerRadius) Sets the outer radius of the star, that is the distance between its center and the tips of the branches.void
setX
(double x) Sets location of the center of the star.void
setY
(double y) Sets the location of the center of the star.
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Field Details
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starShape
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x
private double x -
y
private double y -
innerRadius
private double innerRadius -
outerRadius
private double outerRadius -
branchesCount
private int branchesCount
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Constructor Details
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Star2D
public Star2D(double x, double y, double innerRadius, double outerRadius, int branchesCount) Creates a new star whose center is located at the specified
x
andy
coordinates. The number of branches and their length can be specified.- Parameters:
x
- the location of the star centery
- the location of the star centerinnerRadius
- the distance between the center of the star and the origin of the branchesouterRadius
- the distance between the center of the star and the tip of the branchesbranchesCount
- the number of branches in this star; must be >= 3- Throws:
IllegalArgumentException
- ifbranchesCount
is invalid input: '<' 3 or if
innerRadius
is >=outerRadius
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Method Details
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generateStar
private static Shape generateStar(double x, double y, double innerRadius, double outerRadius, int branchesCount) -
setInnerRadius
public void setInnerRadius(double innerRadius) Sets the inner radius of the star, that is the distance between its center and the origin of the branches. The inner radius must always be lower than the outer radius.
- Parameters:
innerRadius
- the distance between the center of the star and the origin of the branches- Throws:
IllegalArgumentException
- if the inner radius is >= outer radius
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setX
public void setX(double x) Sets location of the center of the star.
- Parameters:
x
- the x location of the center of the star
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setY
public void setY(double y) Sets the location of the center of the star.
- Parameters:
y
- the x location of the center of the star
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setOuterRadius
public void setOuterRadius(double outerRadius) Sets the outer radius of the star, that is the distance between its center and the tips of the branches. The outer radius must always be greater than the inner radius.
- Parameters:
outerRadius
- the distance between the center of the star and the tips of the branches- Throws:
IllegalArgumentException
- if the inner radius is >= outer radius
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setBranchesCount
public void setBranchesCount(int branchesCount) Sets the number branches of the star. A star must always have at least 3 branches.
- Parameters:
branchesCount
- the number of branches- Throws:
IllegalArgumentException
- ifbranchesCount
is <=2
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getX
public double getX()Returns the location of the center of star.
- Returns:
- the x coordinate of the center of the star
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getY
public double getY()Returns the location of the center of star.
- Returns:
- the y coordinate of the center of the star
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getInnerRadius
public double getInnerRadius()Returns the distance between the center of the star and the origin of the branches.
- Returns:
- the inner radius of the star
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getOuterRadius
public double getOuterRadius()Returns the distance between the center of the star and the tips of the branches.
- Returns:
- the outer radius of the star
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getBranchesCount
public int getBranchesCount()Returns the number of branches of the star.
- Returns:
- the number of branches, always >= 3
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getBounds
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getBounds2D
- Specified by:
getBounds2D
in interfaceShape
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contains
public boolean contains(double x, double y) -
contains
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intersects
public boolean intersects(double x, double y, double w, double h) - Specified by:
intersects
in interfaceShape
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intersects
- Specified by:
intersects
in interfaceShape
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contains
public boolean contains(double x, double y, double w, double h) -
contains
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getPathIterator
- Specified by:
getPathIterator
in interfaceShape
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getPathIterator
- Specified by:
getPathIterator
in interfaceShape
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