public void Defaults()
{
shape = null;
userData = null;
friction = 0.2f;
restitution = 0.0f;
density = 0.0f;
isSensor = false;
}
public void Set(b2Shape shape, int index)
{
switch (shape.ShapeType)
{
case b2ShapeType.e_circle:
{
b2CircleShape circle = (b2CircleShape)shape;
m_buffer[0] = circle.Position;
m_vertices = m_buffer;
m_count = 1;
m_radius = circle.Radius;
}
break;
case b2ShapeType.e_polygon:
{
b2PolygonShape polygon = (b2PolygonShape)shape;
m_vertices = polygon.Vertices;
m_count = polygon.VertexCount;
m_radius = polygon.Radius;
}
break;
case b2ShapeType.e_chain:
{
b2ChainShape chain = (b2ChainShape)shape;
Debug.Assert(0 <= index && index < chain.Count);
m_buffer[0] = chain.Vertices[index];
if (index + 1 < chain.Count)
{
m_buffer[1] = chain.Vertices[index + 1];
}
else
{
m_buffer[1] = chain.Vertices[0];
}
m_vertices = m_buffer;
m_count = 2;
m_radius = chain.Radius;
}
break;
case b2ShapeType.e_edge:
{
b2EdgeShape edge = (b2EdgeShape)shape;
m_buffer[0] = edge.Vertex1;
m_buffer[1] = edge.Vertex2;
m_vertices = m_buffer;
m_count = 2;
m_radius = edge.Radius;
}
break;
default:
Debug.Assert(false);
break;
}
}
public static b2DistanceProxy Create(b2Shape shape, int index)
{
b2DistanceProxy bp = Create();
bp.Set(shape, index);
return (bp);
}
public b2Shape(b2Shape copy)
{
m_type = copy.m_type;
m_radius = copy.m_radius;
}
/// Determine if two generic shapes overlap.
public static bool b2TestOverlap(b2Shape shapeA, int indexA,
b2Shape shapeB, int indexB,
ref b2Transform xfA, ref b2Transform xfB)
{
b2DistanceInput input = b2DistanceInput.Create();
input.proxyA = b2DistanceProxy.Create(shapeA, indexA);
input.proxyB = b2DistanceProxy.Create(shapeB, indexB);
input.transformA = xfA;
input.transformB = xfB;
input.useRadii = true;
b2SimplexCache cache = b2SimplexCache.Create();
b2DistanceOutput output = new b2DistanceOutput();
b2Simplex.b2Distance(ref output, ref cache, ref input);
// Console.WriteLine("{2} vs {3}: distance={0} after {1} iters", output.distance, output.iterations, shapeA.ShapeType, shapeB.ShapeType);
return output.distance < 10.0f * b2Settings.b2_epsilon;
}
public virtual void Destroy()
{
m_proxies = null;
m_shape = null;
}
public void Create(b2Body body, b2FixtureDef def)
{
m_userData = def.userData;
m_friction = def.friction;
m_restitution = def.restitution;
m_body = body;
Next = null;
m_filter = def.filter;
m_isSensor = def.isSensor;
m_shape = def.shape.Clone();
// Reserve proxy space
int childCount = m_shape.GetChildCount();
for (int i = 0; i < childCount; ++i)
{
b2FixtureProxy proxy = new b2FixtureProxy();
proxy.fixture = null;
proxy.proxyId = b2BroadPhase.e_nullProxy;
m_proxies.Add(proxy);
}
m_proxyCount = 0;
m_density = def.density;
}
public virtual b2Fixture CreateFixture(b2Shape shape, float density)
{
b2FixtureDef def = b2FixtureDef.Default;
def.shape = shape;
def.density = density;
return CreateFixture(def);
}
public b2Shape(b2Shape copy)
{
ShapeType = copy.ShapeType;
Radius = copy.Radius;
}
public b2Shape(b2Shape copy)
{
m_type = copy.m_type;
m_radius = copy.m_radius;
}
public virtual void Destroy()
{
b2ArrayPool<b2FixtureProxy>.Free(m_proxies);
m_proxies = null;
Shape = null;
}
public void Create(b2Body body, b2FixtureDef def)
{
UserData = def.userData;
Friction = def.friction;
Restitution = def.restitution;
Body = body;
Next = null;
m_filter = def.filter;
m_isSensor = def.isSensor;
Shape = def.shape.Clone();
// Reserve proxy space
int childCount = Shape.GetChildCount();
m_proxies = b2ArrayPool<b2FixtureProxy>.Create(childCount, true);
for (int i = 0; i < childCount; ++i)
{
m_proxies[i].fixture = null;
m_proxies[i].proxyId = b2BroadPhase.e_nullProxy;
}
m_proxyCount = 0;
Density = def.density;
}
public b2Shape(b2Shape copy)
{
ShapeType = copy.ShapeType;
Radius = copy.Radius;
}
/// Determine if two generic shapes overlap.
public static bool b2TestOverlap(b2Shape shapeA, int indexA,
b2Shape shapeB, int indexB,
b2Transform xfA, b2Transform xfB)
{
}