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Emil_K_
Beginner
80 Views

Motion blur flag for hit cleared

Hi, first of all, thanks to the devs who are so actively responding to the topics in this forum.

Now to the question, is there a good reason to clear the MSB of hit.id0, when MB triangle was intersected (hit.id0 = tri.id0 & 0x7FFFFFFF; )? I'd really like to check this flag when an intersection occured, to see if MB primitive was intersected, but it is cleared by embree.

Thanks

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2 Replies
Keymaster
New Contributor I
80 Views

Looks like a flag that the triangle is moving is stored there: triangle4i.h: *! moving triangle */ if (id0 & 0x80000000) {
SvenW_Intel
Moderator
80 Views

You can disable the clearing of this flag, however, then you have to be carefull that the renderer clears it when used to access an object by its ID.

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