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Sandy's Forum _ AS2 1.x versions _ creating multiple object3D?

Posted by: tea Aug 8 2006, 06:50 PM

hi all,

let me first preface by saying that i am a total newbie to 3D and to sandy.

i'm trying to do a very simple task - create 2 3D-boxes with a tube connecting the 2 boxes.

looks sort of like this -> []---[]

i was able to figure out the creation of the shapes and use PositionInterpolator to move it to desired locations, but i can't find anywhere how to specify the x,y,z coordinates when creating objects in group. i know it should be really simple .. ugh.

any help is appreciated.

-tea

Posted by: kiroukou Aug 8 2006, 07:53 PM

Hi tea and welcome
In 3D you can give a position to an object and that's all. You must add it to a group, and move the group by applying a transformation to it (so TransformGroup).
The transformation corresponding to a movement is the translation (or PositionINterpolator for an interpolator).

So if you want your object to be at 0,0,500 you must apply a translation of 0,0,500 to it.

It is better now?

Posted by: tea Aug 9 2006, 02:47 AM

thanks kiroukou ~
i was confused about the relationship between Transform3D and TransformGroup.

this diagram also helps explain. it looks pretty similar to your implementation.
http://java.sun.com/products/java-media/3D/forDevelopers/J3D_1_3_API/j3dguide/Introduction.html#47367

your api is very cool and the documentation really, really helps.

now i have to learn bezier interpolation (ugh!) .. i'll be back with more questions for sure.

Posted by: kiroukou Aug 9 2006, 05:40 AM

Yes Sandy is inspired by Java3D.
THose diagrams are almost available for Sandy.

Did you try to read the beginners tutorial? What did you think about it?

Posted by: tea Aug 9 2006, 02:43 PM

yup, i read all the tutorials and did them all a couple of times. the explanation is concise and i like that you explain a lot through code comments. i thought the object heirarchy could use a bit more explanation, which that diagram helped.

the concept of translation vs interpolation is all new to me. i suspect that is basic 3D concept that is pretty standard.

i also think that a short example of camera control filed under tutorial would be nice. i found the code samples throughout the support forum and figured it out. it's a lot easier than i thought to implement but it took me a while to find.

Posted by: kiroukou Aug 9 2006, 03:03 PM

Yes some tutorials are missing indeed.
But I don't have time to do the development AND the full support (forum+website).
As it is an open source project, and the website a Wiki, I expected some contributions concerning the tutorials.

But nothing nobody did it...