Full Panorama export with Cesium

[michaelzwick]

Hi,

I am interested to export a 360° full panorama with Cesium. I think this would be a nice feature. There are two main formats for such a panorama.

• Cubemap https://en.wikipedia.org/wiki/Cube_mapping
• Equirectangular https://en.wikipedia.org/wiki/Equirectangular_projection

An easy way to get the panorama would be like the following description:

• Capture 6 images defined by
  • Camera position (3D) [works]
  • Camera orientation (horizontal and vertical) [works]
  • Camera field of view (horizontal and vertical) [wish]
• Merge the 6 images together
• Transform it to an equirectangular panorama https://www.360toolkit.co/convert-cubemap-to-spherical-equirectangular.html

https://twitter.com/zwickmichael/status/1136964139987939328

The definition of the camera field of view is an open issue. I could not find a solution to define that as the other parameters like position, orientation, etc.

[OmarShehata]

Thanks for opening this issue @michaelzwick ! I do know you can modify the camera frustum (see https://cesiumjs.org/Cesium/Build/Documentation/Camera.html?classFilter=Camera#frustum). Have you tried that? One issue I see there is that depending on the resolution you're rendering to, you may not be able to render the entire cube map in one framebuffer.

I think it would be nice if there was an easy way to do this, I'm not sure if it should be a core part of the engine or an example built on top.

In terms of capturing canvas output in CesiumJS, Kevin talks about how TerriaJS (built on Cesium) does it in this thread:

https://groups.google.com/d/msg/cesium-dev/I-SN1jx0bvg/Vi0h24vFBgAJ

[sonth-bhsoft]

Hello @michaelzwick,

Have you made a demo about export pamorama with Cesium yet?

[michaelzwick]

Hi @OmarShehata

No. I stoped coding a demo when I realised there is no option to define the field of view for the camera. But you will find my deliberations in the first post of this issue.

[mramato]

No. I stoped coding a demo when I realised there is no option to define the field of view for the camera

viewer.scene.camera.frustum.fov allows you to set the field of view, unless you mean that there were limitations to what we support/allow.