* Split RenderableSphere class into a local and an online sphere
* Make the video sphere derive from the regular sphere
* Make RenderableTimeVaryingSphere derive from RenderableSphere
* Some clean up
* Add general functions for renderable matrix calculations
* Make RenderableSphere and Plane use them
* Fix an issue with the RenderablePlane shader
* Make one function that returns all three types of render matrices
* Make more Renderables use the general matric calculation function
* Make more Renderable use the general matrix function
* Simplify alternative transforms for matrix calculations
* Small clean-up
* Update RenderableModel (again) to use new transform functions
* Make calc all matrix function to return tuple
* Update some more places
* Create a RenderableNodeLine example asset
* First version of node direction hint renderable (arrow)
* Add possibility to set length as a multiplier of the bounding sphere
* Draw arrow cylinder using index array
* Update exponents and min max values for lengths
* Draw arrow head
* Only update arrow geometry when positions change
* Add some properties to control visuals of arrow
* Implement invert option
* Add normals and shading
* Set arrow head size by length percentage instead of angle
* Add bottom circle to cone
* Cleanup and update examples
* Remove non-existing property from example asset
* Fix vertices not updating if anchor node was changed
And some missing updates on property change
* Start cleaning up some shape rendering helper functions
* Cleanup code and move cylinder function to helper class
* Refactor cylinder creation code (fewer loops over same vector)
* Update transformations to correctly scale and place arrow
* Add the cone to make the arrowhead
* Update faulty triangle normals
* Add property visibilities
* Rename NodeDirectionHint to NodeArrow
* Apply suggestions from code review
Co-authored-by: Alexander Bock <alexander.bock@liu.se>
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Co-authored-by: Alexander Bock <alexander.bock@liu.se>
