Databases
StackOverflow2013
Postsdbo
POHow can i use void ContactListener::PreSolve(b2Contact* contact, const b2Manifold* oldManifold) method in our application?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow can i use void ContactListener::PreSolve(b2Contact* contact, const b2Manifold* oldManifold) method in our application?
    primarykey
    data
    text
    <p>I dont know how to use this metnod in my application </p> <pre><code>void MyContactListener::PreSolve(b2Contact* contact, const b2Manifold* oldManifold) { b2WorldManifold worldManifold; contact-&gt;GetWorldManifold(&amp;worldManifold); b2PointState state1[2], state2[2]; b2GetPointStates(state1, state2, oldManifold, contact-&gt;GetManifold()); //NSLog(@"Presolving"); if (state2[0] == b2_addState) { const b2Body* bodyA = contact-&gt;GetFixtureA()-&gt;GetBody(); const b2Body* bodyB = contact-&gt;GetFixtureB()-&gt;GetBody(); b2Vec2 point = worldManifold.points[0]; b2Vec2 vA = bodyA-&gt;GetLinearVelocityFromWorldPoint(point); b2Vec2 vB = bodyB-&gt;GetLinearVelocityFromWorldPoint(point); b2Vec2 rV = vB - vA; float32 approachVelocity = b2Dot(rV, worldManifold.normal); if (-1.5f &lt; approachVelocity &amp;&amp; approachVelocity &lt; 0.0f) { //MyPlayCollisionSound(); NSLog(@"Not Playing Sound"); } else { NSLog(@"playing the sound"); } } } </code></pre> <p>How can I use this code in my HelloWorldLayer.mm Please help me... I have a problem here, I have a scene where some bodies falls and hit a static body, edges alike, I implemented the b2ContactListener, and in my tick method Im checking for contacts and play the sound, the problem with this approach is that when a body is constantly in contact with the static body, the sound plays indefinitely overlaying the previous one, so at the end I have huge noise.. What can I do to avoid this situation?</p> <p>Please help me thanks......</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USDiken Shah
    1. USDiken Shah
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow can i use void ContactListener::PreSolve(b2Contact* contact, const b2Manifold* oldManifold) method in our application?
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload