shantiscript

Sorry what do you mean with guess? Is it supported or not?
And if its not supported yet, what is the function of the module file?

Yeah in the puzzles you would create some function, either a while loop that constantly checks if the first frame has been rendered. Or a interval function that checks if the first frame has been rendered.

In code i created a function that first checks if the first frame has been rendered already and if not it runs a check function at an interval of 200ms. The function returns a promise in booth cases

function waitForFirstFrame() {
  return new Promise(resolve => {
    if (appInstance.frame >= 1) {
      resolve()
    } else {
      const waitForFirstFrame = setInterval(() => {
        if (appInstance.frame >= 1) {
          clearInterval(waitForFirstFrame)
          resolve()
        }
      }, 200)
    }
  })
}

you can then run or trigger anything that needs to wait till the first frame has ben rendered in the then() block of that function

waitForFirstFrame().then(runAnimations(animations, { frame: 553, speed: 1 }))

in the example runAnimations will wait till the first frame has been rendered and then start an animation

Thanks Yuri for the fast reply

Hi thanks for the replies!!!
I don’t think you really understand the problem i am running into, so i will try to rephrase.
I disabled auto run in blender for the animation and used the play animation puzzle placed in the main tab as Yuri described.

The problem with that is that the animation starts playing the key frames of the animation before the scene is visible to the user (before the first frame of the actual app is rendered to the screen). Means the animation already starts playing in the background while the loading screen is still indicating the loading. So half of the animation has played once the scene is actually visible to the user.

This is because in my understanding the run() method that is called inside of app.loadScene triggers the render of the app instance after the loadScene callback is fired (once the gltf loader has fetched the gltf into the app instance)
But code thats executed in the puzzles or in run() doesn’t wait for the render function to finish but its executed asynchronously right after the run() function has been called. It doesn’t wait for the first render to be finished and there is no callback or promise to wait for that to happen.
So if the render takes longer to execute all animations triggered with the puzzle on start or in run() will already start running in the background

// loaded GLTF 2.0 asset
var url = 'template.gltf';

// construct a new application with simple rotating preloader
var app = new v3d.App('v3d-container', null, new v3d.SimplePreloader({ container: 'v3d-container' }));

// load main scene
app.loadScene(url, function() {
    app.enableControls();
    app.run();
    runCode();
});

function runCode() {
    // place your own code here
}

So i need a way to wait for the animation to start until the first render is completed.

hi I allready found an answer myself:
https://stackoverflow.com/questions/16625969/how-do-i-change-the-same-parameter-on-multiple-objects-efficiently-in-blender

copy to selected is the magical command.

Still would be courius about las question. Can i change all settings for export globaly?

Thanks for the very detailed reply and also for fixing the memory leak of dispose so quickly.
Also the api explanations of dispose and unload are much clearer now. This is very helpful. I want to work on loading models dynamically into scenes and now its clear where and when to use unload instead of dispose.

Thanks