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java.lang.Objectorg.jbox2d.collision.shapes.Shape
org.jbox2d.collision.shapes.PolygonShape
public class PolygonShape
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.
| Field Summary | |
|---|---|
Vec2 |
m_centroid
Local position of the shape centroid in parent body frame. |
int |
m_count
Number of active vertices in the shape. |
Vec2[] |
m_normals
The normals of the shape. |
Vec2[] |
m_vertices
The vertices of the shape. |
| Fields inherited from class org.jbox2d.collision.shapes.Shape |
|---|
m_radius, m_type |
| Constructor Summary | |
|---|---|
PolygonShape()
|
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| Method Summary | |
|---|---|
Vec2 |
centroid(Transform xf)
Get the centroid and apply the supplied transform. |
Vec2 |
centroidToOut(Transform xf,
Vec2 out)
Get the centroid and apply the supplied transform. |
Shape |
clone()
|
void |
computeAABB(AABB aabb,
Transform xf,
int childIndex)
Given a transform, compute the associated axis aligned bounding box for a child shape. |
void |
computeCentroidToOut(Vec2[] vs,
int count,
Vec2 out)
|
void |
computeMass(MassData massData,
float density)
Compute the mass properties of this shape using its dimensions and density. |
int |
getChildCount()
Get the number of child primitives |
Vec2[] |
getNormals()
Get the edge normal vectors. |
Vec2 |
getVertex(int index)
Get a vertex by index. |
int |
getVertexCount()
Get the vertex count. |
Vec2[] |
getVertices()
Get the vertices in local coordinates. |
boolean |
raycast(RayCastOutput output,
RayCastInput input,
Transform xf,
int childIndex)
Cast a ray against a child shape. |
void |
set(Vec2[] vertices,
int count)
Create a convex hull from the given array of points. |
void |
set(Vec2[] verts,
int num,
Vec2Array vecPool,
IntArray intPool)
Create a convex hull from the given array of points. |
void |
setAsBox(float hx,
float hy)
Build vertices to represent an axis-aligned box. |
void |
setAsBox(float hx,
float hy,
Vec2 center,
float angle)
Build vertices to represent an oriented box. |
boolean |
testPoint(Transform xf,
Vec2 p)
Test a point for containment in this shape. |
boolean |
validate()
Validate convexity. |
| Methods inherited from class org.jbox2d.collision.shapes.Shape |
|---|
getRadius, getType, setRadius |
| Methods inherited from class java.lang.Object |
|---|
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public final Vec2 m_centroid
public final Vec2[] m_vertices
public final Vec2[] m_normals
public int m_count
| Constructor Detail |
|---|
public PolygonShape()
| Method Detail |
|---|
public final Shape clone()
clone in class Shape
public final void set(Vec2[] vertices,
int count)
public final void set(Vec2[] verts,
int num,
Vec2Array vecPool,
IntArray intPool)
public final void setAsBox(float hx,
float hy)
hx - the half-width.hy - the half-height.
public final void setAsBox(float hx,
float hy,
Vec2 center,
float angle)
hx - the half-width.hy - the half-height.center - the center of the box in local coordinates.angle - the rotation of the box in local coordinates.public int getChildCount()
Shape
getChildCount in class Shape
public final boolean testPoint(Transform xf,
Vec2 p)
Shape
testPoint in class Shapexf - the shape world transform.p - a point in world coordinates.
public final void computeAABB(AABB aabb,
Transform xf,
int childIndex)
Shape
computeAABB in class Shapepublic final int getVertexCount()
public final Vec2 getVertex(int index)
index -
public final boolean raycast(RayCastOutput output,
RayCastInput input,
Transform xf,
int childIndex)
Shape
raycast in class Shape
public final void computeCentroidToOut(Vec2[] vs,
int count,
Vec2 out)
public void computeMass(MassData massData,
float density)
Shape
computeMass in class ShapemassData - returns the mass data for this shape.density - the density in kilograms per meter squared.public boolean validate()
public Vec2[] getVertices()
public Vec2[] getNormals()
public Vec2 centroid(Transform xf)
public Vec2 centroidToOut(Transform xf,
Vec2 out)
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