I'm looking for some information on world space transformations, parameter transformations and pre-transformations. And from what I understand, world space transformations of the object is the product of all three mentioned above, that is if this information applies in general to most or all 3D packages ?
You appear to have a strong grasp of this information; therefore more questions may come soon. In the meantime what exactly are pre-transformations and parameter transformations. Parameter transformations are what I'm guessing are what transformations the user applies to the object ?
Not sure where you're getting parameter transformations and pre-transformations. Models are stored in Model space. I.e. each point is relative to the Model's origin. World space transformations take model space and multiply it by rotations, scale or translations in any particular order required.
I read the link you supplied, pretty good :smile: From what I was informed the terms I mentioned are all matrices although I can't find any information regarding pre-transformations ?
Okay: Yes it does apply to all 3D programs but No they don't all work the same way. The order of the transformations differ from software to software, as do the vector directions. E.g. Max is Z up, Maya is Y up, what do you expect to happen to a model with a value of Z when it's imported into Maya? As I mentioned earlier…
I have never heard of those terms relating to this before. Where did you hear them may I ask? Without knowing if there is any special context my guess is you're right and it just sounds like a user input into a matrix such as telling a vertex to move. I have no idea about pre transformations.