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Dark GDK / Scaling Box - Clipping

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Red Eye
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Posted: 8th Aug 2011 16:52
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Hello,

I have made a box with dbMakeObjectBox, I scaled it up, and it seems that the box gets inside the frustrum culling (out of view hiding of objects) when the center point of the box is out of view, meaning a whole part of the box which should be visible aint visible because it is being hided.

Anybody has experience this before and has a fix?

Cheers,

Leo

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Red Eye
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Posted: 9th Aug 2011 21:27
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Some ideas?

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WLGfx
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Posted: 9th Aug 2011 22:13 Edited at: 9th Aug 2011 22:14
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The only way the check whether the camera is inside the box is to set the back face culling to off, thus showing the other sides of each face. Apart from that, re-position your camera to view the object. If an object gets scaled and any faces cross the cameras view then those faces will not be displayed.

Warning! May contain Nuts!
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Matty H
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Posted: 10th Aug 2011 02:33 Edited at: 10th Aug 2011 02:38
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If you create a box(non scaled) the same size as the scaled box, does that one work fine?

I have a feeling there is a command to update object bounds but not sure I could find it for GDK

EDIT: Just read that there is a command dbShowObjectBounds(), if that works then you can see if GDK has wrong bounding box data.

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Indicium
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Posted: 10th Aug 2011 04:57
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You can use dbCalculateObjectBounds( obj ) But you have to add it into the basic3d.h header file.

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Red Eye
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Posted: 10th Aug 2011 13:50
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Quote: "If you create a box(non scaled) the same size as the scaled box, does that one work fine?

I have a feeling there is a command to update object bounds but not sure I could find it for GDK

EDIT: Just read that there is a command dbShowObjectBounds(), if that works then you can see if GDK has wrong bounding box data."


Yeah but that costs loads of cpu.

Quote: "You can use dbCalculateObjectBounds( obj ) But you have to add it into the basic3d.h header file.
"


Thanks it indeed compiled and run the program, altough still the same issue .

Thanks for your time guys! Really appreciate it. More ideas welcome.

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Red Eye
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Posted: 10th Aug 2011 20:13 Edited at: 10th Aug 2011 20:14
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I am using instanced box objects, if that is valueable?

EDIT:
dbCalculateObjectBounds function on the main box did the job THANK YOU!

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