Infinite perspective projection camera

Please, consider adding support for perspective cameras with infinite projection matrix (when zfar isn’t defined).

Some background: https://github.com/KhronosGroup/glTF/issues/722

glTF reference; https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#infinite-perspective-projection

CC @donmccurdy

[donmccurdy]

Thanks all, I will improve the drag-and-drop viewer to infer appropriate near/far planes automatically (https://github.com/donmccurdy/three-gltf-viewer/issues/19).

Whether three.js should support infinite projection matrices, I will leave to you all.

[trusktr]

Closing, but we can revisit if there is a compelling use case.

@WestLangley A bunch of people want to do this:

• Ideally people who know basic web technology (like using CSS 3D perspective) would be able to take existing knowledge and apply it in Three.js without friction. (consistency across web technologies and libraries is ideal)
• Some people like to mix CSS3D with WebGL, and not having infinite perspective is a barrier to doing this. Here’s a bunch of examples and questions:
  • http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs
  • http://learningthreejs.com/blog/2013/04/30/closing-the-gap-between-html-and-webgl/
  • https://github.com/jeromeetienne/threex.htmlmixer (nice demo!)
  • http://michael-staub.rhcloud.com/2015/05/11/webvr-mixing-html-and-webgl/
  • https://stackoverflow.com/questions/33768227
  • https://stackoverflow.com/questions/24681170
  • http://adndevblog.typepad.com/cloud_and_mobile/2015/07/embedding-webpages-in-a-3d-threejs-scene.html
  • http://www.html5gamedevs.com/topic/11910-embedded-html/
  • https://docs.argonjs.io/tutorial/part2

Seems like having infinite perspective would be useful if it doesn’t exist yet. If CSS 3D can do it, so can Three!