public override void PreSolve(b2Contact contact, b2Manifold oldManifold)
{
b2Manifold manifold = contact.GetManifold();
if (manifold.pointCount == 0)
{
return;
}
b2Fixture fixtureA = contact.GetFixtureA();
b2Fixture fixtureB = contact.GetFixtureB();
b2Collision.b2GetPointStates(state1, state2, oldManifold, manifold);
contact.GetWorldManifold(ref worldManifold);
for (int i = 0; i < manifold.pointCount && m_pointCount < k_maxContactPoints; ++i)
{
ContactPoint cp = m_points[m_pointCount];
if (cp == null)
{
cp = new ContactPoint();
m_points[m_pointCount] = cp;
}
cp.fixtureA = fixtureA;
cp.fixtureB = fixtureB;
cp.position = worldManifold.points[i];
cp.normal = worldManifold.normal;
cp.state = state2[i];
++m_pointCount;
}
}
private void CalculateDetails()
{
_DetailsCalculated = true;
_ContactPoints = new TypeVector2 <Vector2>();
b2WorldManifold worldManifold = new b2WorldManifold();
_Contact.GetWorldManifold(worldManifold);
_Normal = worldManifold.normal.ToVector2();
_ContactPoints.x = Box2d.b2Vec2Array_getitem(worldManifold.points, 0).ToVector2();
_ContactPoints.y = Box2d.b2Vec2Array_getitem(worldManifold.points, 1).ToVector2();
}