private void GetRandomAABB(ref AABB aabb)
{
Vec2 w = new Vec2(); w.Set(k_width, k_width);
aabb.LowerBound.X = Box2DXMath.Random(-_extent, _extent);
aabb.LowerBound.Y = Box2DXMath.Random(0.0f, 2.0f * _extent);
aabb.UpperBound = aabb.LowerBound + w;
}
private void Action()
{
int choice = (int)Box2DXMath.Random(0, 2);
switch (choice)
{
case 0:
CreateProxy();
break;
case 1:
DestroyProxy();
break;
default:
MoveProxy();
break;
}
}
private void MoveAABB(ref AABB aabb)
{
Vec2 d = new Vec2();
d.X = Box2DXMath.Random(-0.5f, 0.5f);
d.Y = Box2DXMath.Random(-0.5f, 0.5f);
//d.x = 2.0f;
//d.y = 0.0f;
aabb.LowerBound += d;
aabb.UpperBound += d;
Vec2 c0 = 0.5f * (aabb.LowerBound + aabb.UpperBound);
Vec2 min = new Vec2(); min.Set(-_extent, 0.0f);
Vec2 max = new Vec2(); max.Set(_extent, 2.0f * _extent);
Vec2 c = Box2DXMath.Clamp(c0, min, max);
aabb.LowerBound += c - c0;
aabb.UpperBound += c - c0;
}