Away3D Forum Check contact/noncontact between two rigidbodies

entropic, Newbie
Posted: 16 July 2012 07:15 AM Total Posts: 16

A simple question.
What i am wrong here?

I have a RigidBody with mass zero: sceneBody
and a RigidBody which collide with it: bodyC

and i want to permanent check the contact between this two objects

bodyC.addRay(new Vector3D(0, 0, 0), new Vector3D(0, -250, 0))

bodyC.addEventListener(AWPEvent.RAY_CAST, checkContact)
private function sphereRayCast(event: AWPEvent) : void { 
 if (event.collisionObject == sceneBody) {
  myText.text = "CONTACT"
 }
 if (event.collisionObject == null) {// of course a NON PROGRAMMING script but ...only for exemplification
  myText.text = "NON CONTACT"
 } 
} 

I just cannot find a way to have a CONSTANT CHECK of the contact and non contact

So….the stupid question..: How do i get the “null” contact…the NON CONTACT ??!!

I mean if i would have another body in scene…

private function sphereRayCast(event: AWPEvent) : void { 
 if (event.collisionObject == sceneBody) {
  myText.text = "CONTACT"
 }
 if (event.collisionObject == otherBody) {
  myText.text = "OTHER BODY CONTACT"
 } 
} 

...this work…

but again…how did i get the “non contact”

John Brookes, Moderator
Posted: 16 July 2012 12:50 PM Total Posts: 732 [ # 1 ]

use the collision event if its not firing the rigidbody isnt in contact

eg

physicsWorld.collisionCallbackOn = true;
//...
sphereRigidBody.addEventListener(AWPEvent.COLLISION_ADDED, sphereCollisionAdded);
//..
private function sphereCollisionAdded(e:AWPEvent):void 
{
 contact = true
 trace(contact)
}
//enterframe
contact = false;
physicsWorld.step(dt, 6);
view.render();
trace("\t"+contact) 

entropic, Newbie
Posted: 17 July 2012 10:04 AM Total Posts: 16 [ # 2 ]

He,...this is the standard “Physics Away Examples” solution but is not so “academic”.... at all.
As a nice impossible simple problem, i just ask this:

Let say i have a a text field , and i want to SIMPLE PUT IT IN ENTERFRAME WITH THE RESULTS :

//enterframe
    if(contact == true){
     myText.text = "you are in contact with floor"
    }
    if(contact == false){
     myText.text = "you are in air"
    } 

I give a box of beer if it work….

Ringo Blanken, Administrator
Posted: 17 July 2012 11:32 AM Total Posts: 120 [ # 3 ]

Hey entropic,

I think John gave a nice answer did you try that ?
No need to use caps and thank you John.

Signature

Freelancer: http://www.ringo.nl/en/
http://www.jiglibflash.com
http://www.awayphysics.com
http://www.away3d.com

entropic, Newbie
Posted: 17 July 2012 05:02 PM Total Posts: 16 [ # 4 ]

Nice indeed.
I did not take into account the exact “geometry” of the script.

I’m quite clear what happens

the exact call to work is:

//enterframe
   contact = false;
   
   //rendering
   scenaPhysics.step(timeStep); 
   view.render();   
   
   //check
   if(contact == true){
    myText.text = "yes"
   }
   if(contact == false){
    myText.text = "no"
   } 

I owe a crate of beer…

John Brookes, Moderator
Posted: 17 July 2012 07:01 PM Total Posts: 732 [ # 5 ]

http://away3d.com/donate/

Check contact/noncontact between two rigidbodies Software: Away3D 4.x

entropic, Newbie Posted: 16 July 2012 07:15 AM Total Posts: 16 A simple question. What i am wrong here? I have a RigidBody with mass zero: sceneBody and a RigidBody which collide with it: bodyC and i want to permanent check the contact between this two objects `bodyC.addRay(new Vector3D(0, 0, 0), new Vector3D(0, -250, 0)) bodyC.addEventListener(AWPEvent.RAY_CAST, checkContact) private function sphereRayCast(event: AWPEvent) : void { if (event.collisionObject == sceneBody) { myText.text = "CONTACT" } if (event.collisionObject == null) {// of course a NON PROGRAMMING script but ...only for exemplification myText.text = "NON CONTACT" } }` I just cannot find a way to have a CONSTANT CHECK of the contact and non contact So….the stupid question..: How do i get the “null” contact…the NON CONTACT ??!! I mean if i would have another body in scene… `private function sphereRayCast(event: AWPEvent) : void { if (event.collisionObject == sceneBody) { myText.text = "CONTACT" } if (event.collisionObject == otherBody) { myText.text = "OTHER BODY CONTACT" } }` ...this work… but again…how did i get the “non contact”
John Brookes, Moderator Posted: 16 July 2012 12:50 PM Total Posts: 732 [ # 1 ] use the collision event if its not firing the rigidbody isnt in contact eg `physicsWorld.collisionCallbackOn = true; //... sphereRigidBody.addEventListener(AWPEvent.COLLISION_ADDED, sphereCollisionAdded); //.. private function sphereCollisionAdded(e:AWPEvent):void { contact = true trace(contact) } //enterframe contact = false; physicsWorld.step(dt, 6); view.render(); trace("\t"+contact)`
entropic, Newbie Posted: 17 July 2012 10:04 AM Total Posts: 16 [ # 2 ] He,...this is the standard “Physics Away Examples” solution but is not so “academic”.... at all. As a nice impossible simple problem, i just ask this: Let say i have a a text field , and i want to SIMPLE PUT IT IN ENTERFRAME WITH THE RESULTS : `//enterframe if(contact == true){ myText.text = "you are in contact with floor" } if(contact == false){ myText.text = "you are in air" }` I give a box of beer if it work….
Ringo Blanken, Administrator Posted: 17 July 2012 11:32 AM Total Posts: 120 [ # 3 ] Hey entropic, I think John gave a nice answer did you try that ? No need to use caps and thank you John. Signature Freelancer: http://www.ringo.nl/en/ http://www.jiglibflash.com http://www.awayphysics.com http://www.away3d.com
entropic, Newbie Posted: 17 July 2012 05:02 PM Total Posts: 16 [ # 4 ] Nice indeed. I did not take into account the exact “geometry” of the script. I’m quite clear what happens the exact call to work is: `//enterframe contact = false; //rendering scenaPhysics.step(timeStep); view.render(); //check if(contact == true){ myText.text = "yes" } if(contact == false){ myText.text = "no" }` I owe a crate of beer…
John Brookes, Moderator Posted: 17 July 2012 07:01 PM Total Posts: 732 [ # 5 ] http://away3d.com/donate/

Check contact/noncontact between two rigidbodies

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