Location of 3D in 2D - Printable Version
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Location of 3D in 2D - bmantzey - Dec 17, 2008 11:04 AM
I wasn't sure what to title this one, and I'm not having any luck finding any info about this out there. I had a hard enough time getting my 3D meshes to draw in an Orthographic projection.
So, I have these 3D objects drawing in an orthographic projection. I figured out that translating them is a little bit different because although there is a Z, you can't see any changes until it reaches a clipping plane and the unit of movement is different.
Since the units are different, I'm clueless as to how I can determine the object's size on screen or how I could determine a certain position in the mesh at all times through rotations and all.
Does anyone have any info as to how I can measure 3D objects drawn in an orthographic scene and most importantly, always identify a specific location in that mesh regardless of rotation or position? What I need is the screen space information about the objects. Thanks in advance!
Location of 3D in 2D - ThemsAllTook - Dec 17, 2008 11:16 AM
Location of 3D in 2D - bmantzey - Dec 17, 2008 10:53 PM
Oooh, no glu for me. I'm doing an iPhone game.
Location of 3D in 2D - arekkusu - Dec 17, 2008 11:45 PM
Then you need to learn linear algebra, and implement software transform.
Location of 3D in 2D - bmantzey - Dec 18, 2008 12:07 AM
I have some knowledge of linear algebra. Thanks for narrowing it down for me. I'll just go ahead with that software transform right away. Thanks for your help, now I know exactly what to do now.
Location of 3D in 2D - AnotherJake - Dec 18, 2008 12:34 AM
Or you can grab it from the mesa source. (I never remember where that is, sorry... try google )
 ... silly me, try: http://www.mesa3d.org/
Location of 3D in 2D - ThemsAllTook - Dec 18, 2008 07:59 AM
Location of 3D in 2D - bmantzey - Dec 18, 2008 10:05 PM
Very helpful and greatly appreciated, thank you Took and Jake.