Circle class
The circle with a given center and a radius.
A circle's radius cannot be negative, but it can be zero.
A circle transforms into a circle under any conformal transformation, i.e. a Transform2D that contains translations, rotations, and uniform scaling. Under a generic projection, a circle would turn into an ellipse, however, this is currently not implemented.
Properties
- aabb → Aabb2
-
The axis-aligned bounding box of the shape.
no setteroverride
- center → Vector2
-
The central point of the shape.
no setteroverride
- hashCode → int
-
The hash code for this object.
no setterinherited
- isClosed → bool
-
True if the shape is "closed", in the sense that it has an interior. For
example, a closed shape can be filled with a paint.
no setterinherited
- isConvex → bool
-
True if the shape is convex, i.e. a line segment connecting any two points
of the shape would lie completely within the shape.
no setteroverride
- perimeter → double
-
The length of the shape's boundary. For some more complicated shapes this
can be computed approximately.
no setteroverride
- radius → double
-
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
asPath(
) → Path -
Converts the shape to a Path object, suitable for rendering on a canvas.
If a particular geometric primitive cannot be represented as a Path
faithfully, an approximate path can be returned.
override
-
containsPoint(
Vector2 point) → bool -
Returns true if the given
pointis inside the shape or on the boundary.override -
move(
Vector2 offset) → void -
Translates the shape by the specified
offsetvector, in-place.override -
nearestPoint(
Vector2 point) → Vector2 -
Returns a point on the shape's boundary which is closest to the given
point.override -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
project(
Transform2D transform, [Shape? target]) → Shape -
Returns the result of applying an affine transformation to the shape.
override
-
randomPoint(
{Random? random, bool within = true}) → Vector2 -
Returns a random point within the shape if
withinis true (default) and otherwise a point along the edges of the shape. Do note thatwithin=true also includes the edges.override -
support(
Vector2 direction) → Vector2 -
Finds the intersection of this shape with another one, if it exists.
Returns a point on the boundary that is furthest in the given
direction.override -
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
fromPoints(
Vector2 p1, Vector2 p2, Vector2 p3) → Circle? - Tries to create a Circle that intersects the 3 points, if it exists.