TLDR

Camera Rotation Point: ~ ~1.62 ~
What is the dimentions of the player hitbox: 0.6x1.8x0.6 XYZ

Camera Rotation Point while crouching: ~ ~1.27 ~
Hitbox Dimentions while crouching: 0.6x1.5x0.6 XYZ

Camera Rotation Point while crawling/swiming/elytra flying: ~ ~0.4 ~
Hitbox Dimentions while crawling/swiming/elytra flying: 0.6x0.6x0.6 XYZ

Camera Rotation Point while siting: ~ ~1.62 ~
Hitbox Dimentions while siting: 0.6x1.8x0.6 XYZ
Note: Siting only changes the model, and nothing else.

How close can a object be to the Camera Rotation Point and be visible: ^ ^ ^0.05
How far back from the Camera Rotation Point is third person backwards: ^ ^ ^-4
How far fowrad from the Camera Rotation Point is third person forword: ^ ^ ^4
Note: I recomend a little wiggle room if you are displaying particals very close to the camera.

How far can the player interact with blocks, from Camera Rotation Point: 5 blocks, seemingly rounded down a block at all times.
How far can the player interact with entitys, from Camera Rotation Point: ^ ^ ^5.47600

Player Head Rotation Point: ~ ~1.4 ~
Player Head Dimentions: 0.46x0.46x0.46 XYZ
Pixel size on bottom skin layer: 0.0575x0.0575

How did i get my data

For the camera position, i telported my rotation to 0,0 then used the feture to get the cordinates of the wall you are looking at, then subtracted my players y position agenst that position. This is what i did for all rotation points.

For the how close tests, to find where the camera plane is, i made a particle come conser and closer to my camera till i could no longer see it, changing the partical size to make it eazy to find. I did the same for the therd person cameras to find there relitive positions.

For the reach tests, i simply used precicion telportation to find the boundary where i could no longre reach a block, Same with entitys.

For the player head rotation point, trial and error. Once i found the head rotation point i did trial and error to get a tiny partical to sit on 2 corrners of a pixel on the players face. It also resulting in me knowing the players head size.

What use is this?

Command block, and datapcks mainly. Prehaps for modding as well. Im a datapack maker, needed to know this info for advanced stuff. Like making particles on specific parts of the body, or other things. What you use this for is up too you. Feel free to suggest possible additions to this blog, and new stats to list.