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I need zoom factor instead of mm

Anonymous 5 years ago 0
This discussion was imported from CodePlex

behnam263 wrote at 2014-08-16 07:43:

if i zoom with scroll or other keys position of camera will change which is linear changing
I need zoom factor is there any built in zoom factor or something which i can use?
there is some explanation about zoom factor and zoom in mm in this link:
http://chrisjones.id.au/FOV/fovtext.htm

objo wrote at 2014-08-18 13:22:

This is an interesting idea. Do I understand correctly - zooming should be done linearly in angle of view (fov) or focal length?
I have added the feature in the issue tracker: https://helixtoolkit.codeplex.com/workitem/10068

behnam263 wrote at 2014-08-20 18:00:

Yep