public static void CollidePolygonAndCircle(out Manifold manifold, PolygonShape polygon, Transform xf1, CircleShape circle, Transform xf2)
{
var polyLock = polygon.Lock();
var circleLock = circle.Lock();
NativeMethods.cb2_collidepolygonandcircle(out manifold, polyLock, xf1, circleLock, xf2);
polygon.Unlock();
circle.Unlock();
}
public static void CollidePolygons(out Manifold manifold, PolygonShape poly1, Transform xf1, PolygonShape poly2, Transform xf2)
{
var poly1Lock = poly1.Lock();
var poly2Lock = poly2.Lock();
NativeMethods.cb2_collidepolygons(out manifold, poly1Lock, xf1, poly2Lock, xf2);
poly1.Unlock();
poly2.Unlock();
}
public static void CollideCircles(out Manifold manifold, CircleShape circle1, Transform xf1, CircleShape circle2, Transform xf2)
{
var circle1Lock = circle1.Lock();
var circle2Lock = circle2.Lock();
NativeMethods.cb2_collidecircles(out manifold, circle1Lock, xf1, circle2Lock, xf2);
circle1.Unlock();
circle2.Unlock();
}
public override void PreSolve(Contact contact, Manifold oldManifold)
{
base.PreSolve(contact, oldManifold);
Fixture fixtureA = contact.FixtureA;
Fixture fixtureB = contact.FixtureB;
if (fixtureA != m_platform && fixtureA != m_character)
return;
if (fixtureB != m_character && fixtureB != m_character)
return;
Vec2 position = m_character.Body.Position;
if (position.Y < m_top + m_radius - 3.0f * Box2DSettings.b2_linearSlop)
contact.Enabled = false;
}
public static extern void b2contact_evaluate(IntPtr contact, out Manifold outManifold, Transform xfA, Transform xfB);
public void Evaluate(out Manifold manifold, Transform xfA, Transform xfB)
{
manifold = new Manifold();
NativeMethods.b2contact_evaluate(_contactPtr, out manifold, xfA, xfB);
}
void PreSolveInternal(IntPtr contact, Manifold oldManifold)
{
PreSolve(Contact.FromPtr(contact), oldManifold);
}
public static extern void cb2_collidecircles(out Manifold manifold, IntPtr circle1, Transform xf1, IntPtr circle2, Transform xf2);
public abstract void PreSolve(Contact contact, Manifold oldManifold);
void PreSolveInternal(IntPtr contact, Manifold oldManifold)
{
PreSolve(Contact.FromPtr(contact), oldManifold);
}
public static extern void cb2_collidepolygons(out Manifold manifold, IntPtr polygon1, Transform xf1, IntPtr polygon2, Transform xf2);
public static extern void cb2_collidepolygonandcircle(out Manifold manifold, IntPtr polygon, Transform xf1, IntPtr circle, Transform xf2);
public static extern void cb2_collidecircles(out Manifold manifold, IntPtr circle1, Transform xf1, IntPtr circle2, Transform xf2);
public static extern void b2contact_getmanifold(IntPtr contact, out Manifold manifold);
public static extern void cb2_collidepolygonandcircle(out Manifold manifold, IntPtr polygon, Transform xf1, IntPtr circle, Transform xf2);
public static void GetPointStates(ref PointState[] state1, ref PointState[] state2,
ref Manifold manifold1, ref Manifold manifold2)
{
for (int i = 0; i < Box2DSettings.b2_maxManifoldPoints; ++i)
{
state1[i] = PointState.Null;
state2[i] = PointState.Null;
}
// Detect persists and removes.
for (int i = 0; i < manifold1.PointCount; ++i)
{
ContactID id = manifold1[i].ID;
state1[i] = PointState.Remove;
for (int j = 0; j < manifold2.PointCount; ++j)
{
if (manifold2[j].ID.Key == id.Key)
{
state1[i] = PointState.Persist;
break;
}
}
}
// Detect persists and adds.
for (int i = 0; i < manifold2.PointCount; ++i)
{
ContactID id = manifold2[i].ID;
state2[i] = PointState.Add;
for (int j = 0; j < manifold1.PointCount; ++j)
{
if (manifold1[j].ID.Key == id.Key)
{
state2[i] = PointState.Persist;
break;
}
}
}
}
public static extern void cb2_collidepolygons(out Manifold manifold, IntPtr polygon1, Transform xf1, IntPtr polygon2, Transform xf2);
public override void PreSolve(Contact contact, Manifold oldManifold)
{
Manifold manifold = contact.Manifold;
if (manifold.PointCount == 0)
return;
Fixture fixtureA = contact.FixtureA;
Fixture fixtureB = contact.FixtureB;
PointState[] state1 = new PointState[Box2DSettings.b2_maxManifoldPoints],
state2 = new PointState[Box2DSettings.b2_maxManifoldPoints];
Manifold.GetPointStates(ref state1, ref state2, ref oldManifold, ref manifold);
WorldManifold worldManifold = contact.WorldManifold;
for (int i = 0; i < manifold.PointCount && m_pointCount < ContactPoint.k_maxContactPoints; ++i)
{
m_points[m_pointCount].fixtureA = fixtureA;
m_points[m_pointCount].fixtureB = fixtureB;
m_points[m_pointCount].position = worldManifold.Points[i];
m_points[m_pointCount].normal = worldManifold.Normal;
m_points[m_pointCount].state = state2[i];
++m_pointCount;
}
}
public abstract void PreSolve(Contact contact, Manifold oldManifold);
