Calculating the impact angle of a hit_list ray

[frizensami]

Hello, and thank you very much for making this software!

I'm trying to compute the impact angle for each ray that hits a CCD sensor. If the ccd sensor is represented by CCD, I am trying to achieve this with:

for impactPoints, ray in CCD.hit_list:
   impactRayDirection = ray.dir

Does impactRayDirection represent the impact angle?

Thank you!

[ramezquitao]

Hello. The ray direction is a unitary vector that represents the "direction" of propagation of the ray. This is, a ray propagating in the Z direction will have a dir of (0,0,1). To get the angle incidence angle, you will have to compare this with the normal vector of the surface. I guess using something like a dot product could be used for this.

El mar., 20 de julio de 2021 21:43, Sriram Sami @.***> escribió:

Hello, and thank you very much for making this software!

I'm trying to compute the impact angle for each ray that hits a CCD sensor. If the ccd sensor is represented by CCD, I am trying to achieve this with:

for impactPoints, ray in CCD.hit_list: impactRayDirection = ray.dir

Does impactRayDirection represent the impact angle?

Thank you!

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[frizensami]

Thank you very much! I managed to transform the system 3D plots that looked like this:

into plots describing whether a ray hit the CCD sensor from the left or right side of lens' axis here: