Action Manager and OnIntersectionEnterTrigger

[gryff]

After a lot of procrastination, I have started playing around with the Action Manager and quite enjoying it (after Temechon pointed out the necessary BJS to use).

 

I have been testing it with mesh picking and intersecting. With mesh picking I can use ExecuteCodeAction to call a function , and in that function use this line of code to get the mesh name

var aMeshName = myScene.meshUnderPointer.name;

 Question I have is how can I get the name of the mesh I have just intersected with?

 

cheers, gryff

[gryff]

And another little question. I want to disable (not change its on/off state) a light through the Action Manager. I've tried these lines of code:

mesh.actionManager.registerAction(new BABYLON.SetValueAction({ trigger: BABYLON.ActionManager.OnIntersectionEnterTrigger, parameter: camSensor }, light, "setEnabled", false));andmesh.actionManager.registerAction(new BABYLON.SwitchBooleanAction({ trigger: BABYLON.ActionManager.OnIntersectionEnterTrigger, parameter: camSensor }, light, "setEnabled", false));and mesh.actionManager.registerAction(new BABYLON.SwitchBooleanAction({ trigger: BABYLON.ActionManager.OnIntersectionEnterTrigger, parameter: camSensor }, light, "isEnabled", false));

none of them  work.

 

Any thoughts gratefully appreciated

 

cheers, gryff

[Temechon]

Hey gryff, 

 

 

 

Question I have is how can I get the name of the mesh I have just intersected with?

 

Yes you can. In your callback function of ExecuteCodeAction : 

function(evt) {   // myarray is an array containing all meshes colliding with your mesh   var myarray = evt.source._intersectionsInProgress;}

Next question : 

 

 

 

 I want to disable (not change its on/off state) a light through the Action Manager

 

I don't know how you can disable a light in a scene but I will guess you can use the function setEnabled. If so, you can use : 

mesh.actionManager.registerAction(new BABYLON.SetValueAction({ trigger: BABYLON.ActionManager.OnIntersectionEnterTrigger, parameter: camSensor }, light, "_isEnabled", false));

or : 

mesh.actionManager.registerAction(new BABYLON.SwitchBooleanAction({ trigger: BABYLON.ActionManager.OnIntersectionEnterTrigger, parameter: camSensor }, light, "_isEnabled"));

(Code not tested).

 

Cheers !

[Dad72]

isEnabled() return boolean but does not modify and setEnabled(bool) are functions and it is asking "property" in switchBooleanAction or SetValueAction for example.
 
It would be interesting to have a property for the lights with a boolean for the show or hide.
 
light.show = true || false; //for example would be good
 
Otherwise: (ExecuteCodeAction)

mesh.actionManager.registerAction(new BABYLON.ExecuteCodeAction({ trigger: BABYLON.ActionManager.OnIntersectionEnterTrigger, parameter: camSensor },     function() {          if(light.isEnabled() == false) {               light.setEnabled(true);          } else {               light.setEnabled(false);          }    }}));

[gryff]

isEnabled() return boolean but does not modify and setEnabled(bool) are functions and it is asking "property" in switchBooleanAction or SetValueAction for example.

 

It would be interesting to have a property for the lights with a boolean for the show or hide.

 

@dad72: I was thinking that way too. And I was figuring that I would have to use some "ExecuteCodeAction" in some way.

 

But then I tried Temechon's suggested code - and it worked.    You can try it here:

 

Actions and Lights in Zones

 

The pink cube is a "pick" action that toggles its material. Move the little blue cube (attached to the free camera) towards a corner watch lights go on and off. 

 

(Edit: Updated the scene so now there are 9 lights - a Hemi and two Pointlights per colour zone .)

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@Temechon: I have absolutely no idea why your code works. The difference between code I tried and your code seems to be the little underscore.

 

My code: "isEnabled" -  throws errors.

Your code "_isEnabled" - works like a charm.

 

A little question - why? (Or is that part of the "Black Arts" that is involved in writing javascript? )

 

dad72 and Temechon - TY both for thoughts and ideas. And thanks to you Temechon for that second tutorial of yours that got me investigating the Action Manager

 

cheers, gryff

 

[Temechon]

It's totally black magic !

 

Actually, the underscore means private members in javascript. But in Javascript, private does not exist, everything is public, and the underscore is more than a naming convention.

 

You can see in the method setEnabled in class Node that the attribute set to false is...this._isEnabled, With the underscore  

 

Cheers, 

[Dad72]

Normally isEnabled() or _isEnabled is done to check whether true or false. It is of course possible the put a false or true, but not the interest of this function.

 

setEnabled() is to write and the variable isEnabled() a true or false.

 

Even if this works, this is not the good ways of the used.