TypeError: Cannot read property 2 of undefined

adam · February 7, 2021, 2:27am

Reproduce this error by:

Go to playground with chrome
Open devtools
Click toggle device toolbar button.
left click the babylon scene and then click devtools

error

adam · February 7, 2021, 2:39am

This is where the error occurs:

BabylonJS/Babylon.js/blob/cd31eb68e67afe5f2e879a87e67e11d130fad11a/src/DeviceInput/deviceInputSystem.ts#L468


}
catch (e) {
    /* */
}

this._pointerBlurEvent = ((evt) => {
    // Handle mouse buttons
    if (this.isDeviceAvailable(DeviceType.Mouse)) {
        const pointer = this._inputs[DeviceType.Mouse][0];
        for (let i = 0; i <= PointerInput.BrowserForward; i++) {
            if (pointer[i + 2] === 1) {
                pointer[i + 2] = 0;

                if (this.onInputChanged) {
                    this.onInputChanged(DeviceType.Mouse, 0, i + 2, 1, pointer[i + 2]);
                }
            }
        }
    }

    // Handle Active Touches

Evgeni_Popov · February 7, 2021, 2:18pm

Pinging @PolygonalSun

PolygonalSun · February 8, 2021, 5:46pm

Lemme take a look and see what’s going on

PolygonalSun · February 10, 2021, 5:44pm

So just an update on this, it looks like with how this is checking each of the pointerIds, it’s also trying to work with ids that have already been resolved and removed. I have a fix incoming today that should take care of this issue.

PolygonalSun · February 12, 2021, 8:51pm

This issue is fixed by this PR: Properly register pointerUp event for touch input when window is blurred by PolygonalSun · Pull Request #9913 · BabylonJS/Babylon.js (github.com)

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TypeError: Cannot read property 2 of undefined

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