Ian Porter opened this issue on Aug 03, 2003 ยท 47 posts
Ian Porter posted Sun, 03 August 2003 at 12:03 PM
Hi dr geep :-) Okay, For much of this proof I will be using a program called GMAX, which some of you may know is written by Discreet (the people who sell 3DMAX, and who devised the .3DS file format). GMAX is a stripped down version of 3DMAX, which can only export in the proprietary .gmax format. The main difference between GMAX and 3DMAX for my purposes, is that 3DMAX is very expensive, and GMAX is free. I can't afford 3DMAX to try my proof using it, but I would welcome comment from anyone who has that program, and tries what I am about to describe. If you want to verify my results, you could download GMAX, but I hope you will trust my word that I am describing here exactly the results I see. Now having read some books from my local library, on 3Dstudio and MAX, and having looked at GMAX, they all use a default world unit of one inch. The user can change the world unit, but the books warn that if you alter the world unit, you will have no way to ensure that models you load will have their correct dimensions, without asking the person who created them what world unit he/she was using, and setting your own world unit to the same value. I need you to take a leap of faith now, and accept the premise that the world unit of the program which created the models for Poser 2 (and possibly version 1) was one inch, and was possibly a member of the 3Dstudio/MAX line. I have no way to prove that, and if you can't believe it then the rest of this proof is shaky (though there is supporting evidence for this figure later on). Enough of this waffle, let's see something interesting... Right, Open Poser, any version (I've tried version 2, version 4, and version 5, can't find my CD for version 3 just yet). Delete any figures in the scene, and bring in a cube from the props library. I hope it is generally accepted that this cube is one tenth of a Poser unit. Scale the cube up to 1000% so that it is 1 Poser unit high, and export it from Poser in 3DS format. Now run up GMAX, verify that it's world unit is set to the factory default of one inch, set the units setup (not the same as world unit, this just controls what graduations are on our ruler) to decimal feet, import the .3DS cube, and look at object properties. Note that GMAX describes this object as having X,Y and Z dimensions of 8.602 feet. You can also try that in decimal inches if you wish, and GMAX will report the cube as having X,Y and Z dimensions of 103.226 inches (which is the same as 8.602 feet). Remember this number, we will make great use of it later. So, Somehow GMAX has decided that the cube is 8.602 feet (103.226 inches) per side. A figure which, coincidentally was the size of the Poser unit in the first release of Poser 5. pause for thought...