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3DS Max/Coord System problem

Started by paul8262 Jan 6, 2004 at 10:56 AM 2 replies 1k views

Original Post

Jan 6, 2004 at 10:56 AM

I have another problem when exporting from Max into the engine,that someone may be able to help with. I export an animated character(character studio)from max,all is good except that when imported into the engine,it is layed back.(no not very relaxed)

its on its back. | ()|------| Is there an easy way,that when i create a biped in max,i can just rotate the biped,to be in this position |-----|() which fixes the problem on a non animated mesh. Though after applying Physique,and creating a .fig file,after i have re-loaded the .fig file or load a bip file,it will return the biped back to the first position(above). Is there a simple way,i can change the coords in max to fix this? I don''t know why this is happening,as when i export from other packages such as TrueSpace,GameSpace,MilkShape etc,it has been in the correct position. Thanks, Paul. |

iNsAn1tY

120

iNsAn1tY

Jan 6, 2004 at 12:48 PM

3DS Max has a different default mapping mode to most other 3D applications. If you look in the bottom-left hand corner of the 3DS Max Perspective view, you''ll notice that the Z axis points straight up, not the Y axis. In OpenGL / Direct3D, it''s generally accepted that the Y axis points up. Basically, your model is being loaded correctly from the file, but your program interprets the vertex data differently to 3DS Max.

This is a problem that''s encountered with MD3 models, but it''s easily corrected. When you''re working with the model, load the transforms and rotations your application requires, but before you render the model, add a -90 degree rotation around the X axis using glRotatef(-90.0f, 1.0f, 0.0f, 0.0f) or it''s D3D equivalent. This solves the problem (take another look at the Perspective window to see why)...

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wasd

Jan 6, 2004 at 1:27 PM

Alternatively, just swap the Y and Z values when you load the model.

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paul8262

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paul8262

Jan 7, 2004 at 7:21 AM

Thanks guys,got it all working properly now

Paul.

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