Aligning the camera so a model fits inside of a box on the screen

[Drolerina (Arno)]

I’m trying to make a something that allows you to position the camera so a model fits inside a box on the screen
The only problem is that I can’t figure out how to calculate the CFrame of the Camera. I have tried out a lot of different things but they never deliver the result I want.

The box on the screen is positioned in the middle of the screen and as size it has an X scale of 0.25 and a Y scale of 1 and the frames SizeConstraint is RelativeYY

Here is an example of what I’m trying to accomplish

[kanamoru (DesertTheater)]

Try to play with Module3D APIs, because earlier i have the same problem but the box was the entire screen, instead of using screen absolutesize, use the box absolutesize. All of the API and how to use it are inside the Module3D with detailed explanation.

Sent from Phone

[Drolerina (Arno)]

Okay thanks I will try that out

[XAXA]

This post might be helpful:

Reverse Module3D

This is sort of what I do. This code isn’t great, but it’s calculating how far out the camera has to zoom to capture an item with the given size, passed in as a Vector3. This is an approximation to the real solution, which should project points to the screen and then zoom out accordingly. A benefit to this code is that it maintains zoom while ignoring orientation which is important. However, the calculation for size does mean that sometimes items end up off-screen. This code is provided as a …

[Drolerina (Arno)]

I finally was able to get it work! I used a combination of the Module3D API and the AABB algorithm that you can find here:

Reverse Module3D

If you want the camera to focus on one part, you can set its CameraSubject to that part. If you can select a part that is close to the center of the model all the time, that’s great! Your work stops here. If you do not have a part close to the center of the model, you will need a more complicated solution, like an AABB algorithm (Axis-Aligned Bounding Box) and position the camera around its center (possibly also using CameraSubject) Both @CloneTrooper1019 and @zeuxcg have made some in RbxLua. …