Editor: Fixed shadow casting bug.

[linbingquan]

No description provided.

[Mugen87]

Can you please shortly explain what this bug fix is about?

[linbingquan]

@Mugen87 I wanna to make shadow effect, when I toggle Checkbox of ReceiveShadow, but Editor doesn't render immediately.

[Mugen87]

Good catch! Indeed, the shadow casting works correctly on your branch.

[mrdoob]

Hmm, I'm not able to reproduce the issue in https://threejs.org/editor/.
What are the steps to reproduce?

[linbingquan]

@mrdoob I make a DirectionalLight and a Box with Shadow cast, and Plane without Shadow receive. When I toggle Shadow receive of Plane, the shadow receiveing doesn't work immediately.

Result screen shot:

and then I switch CheckBox tow times, the shadow receiveing works correctly.

Result screen shot:

[mrdoob]

Ah, I see. I can reproduce that and I understand why it's happening.
I think the fix is good.

[mrdoob]

Thanks!