PolygonShape class

A convex polygon shape. Polygons have a maximum number of vertices equal to _maxPolygonVertices. In most cases you should not need many vertices for a convex polygon.

Inheritance

Constructors

PolygonShape()

Properties

centroid → Vector2
Local position of the shape centroid in parent body frame.
final
childCount → int
Get the number of child primitives
no setteroverride
hashCode → int
The hash code for this object.
no setterinherited
normals → List<Vector2>
The normals of the shape. Note: use vertexCount, not _normals.length, to get number of active normals.
final
radius ↔ double
getter/setter pairinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
shapeType → ShapeType
finalinherited
vertices → List<Vector2>
The vertices of the shape. Note: use vertexCount, not _vertices.length, to get number of active vertices.
final

Methods

applyToCentroid(Transform xf) → Vector2
Get the centroid and apply the supplied transform.
clone() → Shape
override
computeAABB(AABB aabb, Transform xf, int childIndex) → void
Given a transform, compute the associated axis aligned bounding box for a child shape.
override
computeCentroid(List<Vector2> vs, int count) → void
computeDistanceToOut(Transform xf, Vector2 p, int childIndex, Vector2 normalOut) → double
Compute the distance from the current shape to the specified point. This only works for convex shapes.
override
computeMass(MassData massData, double density) → void
Compute the mass properties of this shape using its dimensions and density. The inertia tensor is computed about the local origin. density should be in kilograms per meter squared.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
raycast(RayCastOutput output, RayCastInput input, Transform xf, int childIndex) → bool
Cast a ray against a child shape.
override
set(List<Vector2> updatedVertices) → void
Create a convex hull from the given array of points. The length of the list must be in the range 3, Settings.maxPolygonVertices. Warning: the points may be re-ordered, even if they form a convex polygon. Warning: collinear points are removed.
setAsBox(double halfWidth, double halfHeight, Vector2 center, double angle) → void
Build vertices to represent an oriented box. center and angle should be in local coordinates.
setAsBoxXY(double halfWidth, double halfHeight) → void
Build vertices to represent an axis-aligned box.
setAsEdge(Vector2 v1, Vector2 v2) → void
Set this as a single edge.
testPoint(Transform xf, Vector2 p) → bool
Test a point for containment in this shape. This only works for convex shapes.
override
toString() → String
A string representation of this object.
inherited
validate() → bool
Validate convexity. This is a very time consuming operation.

Operators

operator ==(Object other) → bool
The equality operator.
inherited