# Cubes perspective problem

#### ricardoainati

Hello!

I would like to know how to calculate perspective precedence in 3D space. (I'm not a mathematician, so I don't know if it's the correct term, but I will try to explain what I need).

I have an observer in space (px, py, pz).

I also have a Rubik’s Cube, with 27 "little cubes".

I have to calculate the sequence of the nearer cubes, from observer's perspective.

I tried to use the distance's formula to calculate this precedence between the 27 little cubes, but it doesn't help when I have some cubes rotated. I believe that there is something else to calculate, but I don't know what it is.

The problem is seen in picture below: The image shows the moment I'm trying to rotate it and sort using the distance formula. But the cubes with gray faces are in wrong perspective precedence.

The distance formula I use is in http://www.flashandmath.com/flashcs4/zsort/sortpic.jpg

Thanks, and sorry if I wasn't so clear!

#### undefined

MHF Hall of Honor
Hello!

I would like to know how to calculate perspective precedence in 3D space. (I'm not a mathematician, so I don't know if it's the correct term, but I will try to explain what I need).

I have an observer in space (px, py, pz).

I also have a Rubik’s Cube, with 27 "little cubes".

I have to calculate the sequence of the nearer cubes, from observer's perspective.

I tried to use the distance's formula to calculate this precedence between the 27 little cubes, but it doesn't help when I have some cubes rotated. I believe that there is something else to calculate, but I don't know what it is.

The problem is seen in picture below:

View attachment 16808

The image shows the moment I'm trying to rotate it and sort using the distance formula. But the cubes with gray faces are in wrong perspective precedence.

The distance formula I use is in http://www.flashandmath.com/flashcs4/zsort/sortpic.jpg

Thanks, and sorry if I wasn't so clear!
I don't have advice for your problem but I'd like to know what programming language and/or software development environment you're using for this. It looks cool! This is an area I have no experience in but am interested to learn.

#### ricardoainati

Software

I'm using Flash CS4 / Actionscript 3.0 to develop.

You can do many cool stuff with Actionscript's Flash ( this is no ad guys, just an opinion, hehe ).

• undefined