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06-02-2006, 08:53 AM
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#1 |
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New Member
Join Date: Jun 2006
Location: Canada
Posts: 2
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Calculating Half-Width of an OBB
Hi,
I have been struggling with the following problem. I;m trying to calculate the halfwidth of my boundingbox so I can go ahead and use it for an OBB-OBB test. I have the 8 corners of the box, the center and the oriention axis. How do I go about calculating the halfwidth of each axis? Do I need to calculate the planes of the x,y,z axis and then find the distance from the cneter?  Thanks |
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06-02-2006, 09:02 AM
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#2 |
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Senior Member
Join Date: Sep 2005
Location: Jönköping, Sweden
Posts: 570
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Re: Calculating Half-Width of an OBB
Rotate all corners around the center, by the inversed orientation. Then just find min/max values for the axis you are interested in.
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06-02-2006, 09:15 AM
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#3 |
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New Member
Join Date: Jun 2006
Location: Canada
Posts: 2
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Re: Calculating Half-Width of an OBB
Wow! Simple. Thanks.
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06-02-2006, 02:47 PM
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#4 |
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Valued Member
Join Date: Apr 2006
Posts: 206
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Re: Calculating Half-Width of an OBB
I think you can caclulate the half-widths without rotating the obb twice. Something about distance between two points ...
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