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direct 3d transform

Posted on 2002-03-09
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Last Modified: 2013-12-26
Hi!
i'm working with directx 8 and i wanna create a 3d app(c++).

for each object i wanna use, i store all rotations, all scales and all translations. (in each direction (x,y,z)).
so, when i want to render a object, i call

D3DXMatrixTransformation(&matworld,NULL,&t_rotations,&t_scales,NULL,NULL,&t_translations);

and just before rendering
dxmanager->lpd3ddev->SetTransform(D3DTS_WORLD, &matworld);

it seems to work when my object is only scales and/or translated, but when i try to rotate it... the scale doesn't work anymore...

pleeeaaase heeeeeelp!!

thanks, Ralph
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Question by:ralph78
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4 Comments
 
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Accepted Solution

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kamarey earned 50 total points
ID: 6855124
Try this:
D3DXMatrixTransformation(&matworld,NULL,NULL,&t_scales,NULL,&t_rotations,&t_translations);

if it doesn't work use this functions to do your transformations:
D3DXMatrixRotationAxis(), D3DXMatrixScaling(), D3DXMatrixTranslation().
matrix = ms * mr * mt;
SetTransform(matrix);

If it still doesn't work place here your code.
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Expert Comment

by:ET3D
ID: 6882654
You're using the wrong rotation parameter. I assume you want to rotate the object, in which case you should use the rotation and rotation centre parameters, not the "scaling rotation" which you're using in the code you posted.
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Expert Comment

by:CleanupPing
ID: 9464551
ralph78:
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