AbstractEngine and Engine conversion issues

Questions
1

This is part of my code, it gives an error in my project:

this.engine = new BABYLON.Engine(this._canvas, true, { premultipliedAlpha: false, preserveDrawingBuffer: true });
    this.scene = new BABYLON.Scene(this.engine);

image
image1336Ɨ334 37.5 KB

When I use the purchase agent, I still get an error

    this.scene = new BABYLON.Scene(this.engine as BABYLON.AbstractEngine);

image
image997Ɨ228 10.2 KB

I want to know what I should do, looking forward to your reply

2

You should cast engine to Engine:

this.engine as BABYLON.Engine

3

The types should be compatible without issues.

cc @RaananW

4

would you be able to share the project? or a simple reproduction? would be interesting to see what the issue is. no casting should be needed TBH.

5

Iā€™m encountering the same issues for Engine and ThinEngine types.

See here for repro.

6

It is not the same as here you are trying to upcast which is not possible.

In the first part of the thread we mentioned that a downcast should work. But as we did not see the code I wonder if there was not upcasting involved there as well.

7

Just my 2 cents, if the function is about checking the type, you can do something like this:

Engine type error repo | Babylon.js Playground (babylonjs.com)

AbstractEngine is not necessarily an Engine, but an Engine is always an AbstractEngine.

1 Like