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Which field of a camera is changing while scrolling mouse wheel?

Xavier513
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Xavier513

Xavier513

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When I scroll the mouse wheel in Flight scene, the camera will zoom in or zoom out. 

Which field in Camera(or FlightCamera) object is changing? How can I zoom in/out with code as if I'm scrolling the wheel?

It doesn't seem to be the "fov"(field of view) field, on the basis of my test results.:huh:

Edited by Xavier513
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