topic You can disable the clearing in Intel® Embree Ray Tracing Kernels

Motion blur flag for hit cleared

Emil_K_ — Tue, 20 Nov 2012 13:17:11 GMT

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

Looks like a flag that the

Keymaster — Fri, 23 Nov 2012 18:54:25 GMT

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

You can disable the clearing

SvenW_Intel — Fri, 18 Jan 2013 08:54:42 GMT

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.