How can I increase the shadow map resolution?

[harrycollin]

I'd like to increase the resolution of the shadows. They seem to have defaulted to 512x512 for directional lights. When I try to update this value the shadows move all over the tiles like crazy.

[nzjony]

Hi @harrycollin , you can change it here:

harp.gl/@here/harp-mapview/lib/ThemeHelpers.ts

Line 133 in 81f8e59

light.shadow.mapSize.width = 1024;

I changed to 2048x2048 and it worked for me.

[nzjony]

You can also change it at runtime, if you do something like:

(assuming the light is called sun)

    (sun.shadow.map as any).dispose();
    sun.shadow.mapSize.width = 2048;
    sun.shadow.mapSize.height = 2048;

[harrycollin]

When I do this the shadows don't seem to sync up with the map. When I move the camera the shadows slide around all over the tiles.

Any ideas what could cause this?

I'm following this method you proposed.

[harrycollin]

I haven't, I was hoping this could be configured without modifying the src code. I'll try it there and see what happens.

[nzjony]

@harrycollin , did you manage to solve the issue?

Could you change it at run time without changing the harp source code? If not, I can try to look into it again.

[nzjony]

@harrycollin I managed to figure it out, you also need to add: (sun.shadow as any).map = null;

Sorry about that! I will update the shadow demo to show how to change it at runtime.

[nzjony]

@harrycollin see: #2239

[harrycollin]

@nzjony that worked! Thanks :)