Subtractive Refraction Indices of Glass

[itsjustcurtis]

On more complex lens shapes, it is easier to combine several different smaller shapes together. The ability to overlay a shape that cancels the refraction of the item below (e.g. a truncated parabolic shape.)

I have attempted to emulate this effect by using multipliers that should cancel out (i.e. 1.5 as the main shape, 0.667 to cancel) but this isn't having the desired effect. I'm not sure if this is a feature that could be implemented at a later date or if my maths is incorrect!

[itsjustcurtis]

Having played with this further, the desired effect worked when both glass pieces were placed within the same module, but with the main piece in a module, and the "cancelling" piece as its own obj, it did not work as expected.

[ricktu288]

Can you give me the shared link of the scene? I thought it should work no matter they are in the same module or not, even if the gray color of the glass shown on the screen may not correctly corresponding to the equivalent refractive index.

[itsjustcurtis]

https://phydemo.app/ray-optics/simulator/#XQAAAAJ_AQAAAAAAAABDKcrGU8hqLFnpmVEV4ih8ZyjFwnh6sAID5qoVWTZE4qQDHtRoNrg7AH0-_opAfJ1xcyn46grTq7o0hqXdxQe5BSXkH5M57_o4SFTKP0SntmSbguS95J0xDRjypxIlDK1FQdkQjK1unz2BbTG9E4Lwk2WP0LUajiibSpZwcjVzzqlvnpxBRLUrXS0or5uo7zmDI_1ygHq8cUuSSg9JUmFCI0V0JaQ7eijV62aeQ5afJzstfzj1zl-4KAKqxJpKdTI0QuvfE2-ugm2Q5WIpy8AVyME9SKAuv0F2k_ulENynH2SzgiODRd23___sf4wA

On creating this example, the 0.66 lens behaves exactly as I would expect when they are both placed objects, and if they are both in a module, having one in each as in this example seems to be how the bug appears. With that said, looking at the rays, it seems like the rays are being calculated correctly, and it may be the colour rendering of the glass may simply be incorrect.