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RenderKit / ospray

An Open, Scalable, Portable, Ray Tracing Based Rendering Engine for High-Fidelity Visualization
http://ospray.org
Apache License 2.0
1.01k stars 182 forks source link

ospray 2.12.0 build embree missing ispc support #567

Closed semeraro closed 1 year ago

semeraro commented 1 year ago

Hi, I am building ospray 2.12.0 on a windows environment. This version of ospray requires embree 4.0.0 I believe. Configuring ospray with cmake complains that there is no ispc support in embree. The embree changelog says support for ispc was dropped in version 4.0.0. I can rebuild embree with EMBREE_ISPC_SUPPORT=ON but I dont know what the fallout of that will be. Do you recommend I do that or bypass the embree ispc support check in the ospray configure? Thanks, Dave

johguenther commented 1 year ago

Are you using OSPRay's superbuild? By default it fetches Embree binary packages from GitHub, which even in v4.x are compiled with EMBREE_ISPC_SUPPORT=ON. If you manually compile Embree then make sure to set EMBREE_ISPC_SUPPORT=ON (because it is now indeed OFF per default). Bypassing the check in OSPRay configure will only work when you aim to solely build the GPU version, for CPU rendering we still need the ISPC bindings from Embree.

semeraro commented 1 year ago

Thanks for the reply. I am building ospray against a build of openvkl (superbuild). I had been playing with openvkl first. I think going back to start with ospray and throwing the openvkl switch in the superbuild will give me what I need. Thanks again.