Please help, 3D animation play button Java Script

Question

The U3D file embedded into the PDF contains 3 procedure animations
I would like to add a play button for each procedure.
But I do not see the Animation Objects in the model tree of the pdf and I do not know how to connect to these animations
with JavaScript.
I have tried with no luck:
var _anim = scene.animations.getByIndex(0);
scene.activateAnimation(_anim);
_anim.currentTime = 0;
runtime.play();
Please show me how this is done with Java Script on a button.
Thank you

Answer 1

If you're controlling the 3D animation from a button on the PDF page you need to talk to the correct API.
The easiest way to do it is to embed a function into the 3D annotation (using a .js text file) then call that function from your button.
e.g. in the 3D script, use this:
function playAnimation(i) {
var _anim = scene.animations.getByIndex(i);
scene.activateAnimation(_anim);
_anim.currentTime = 0;
runtime.play();
Then on your button, use this:
getAnnots3D(pageNum)[0].context3D.playAnimation(0);
then the same for (1) and (2) on your other buttons.