Raytracer crash with a blocker

[dingzeyuli]

Hi, when I try to do the auralization in a scene like this, the raytracer keeps crashing. The only new element in this scene is the center blocker. I tried to increase the reflection order, it seems to help a little bit, but overall the IMS module still crashes when I move the source around the blocker.

Usually the plugin can be fixed by simply stopping and starting the raytracing module and the on-the-fly aurualization. Do you guys know what might cause this problem? Any possible loophole in the raytracer in the case of multiple bounces? Thank you!

ims_2017-05-02-153952_pixels.crash.txt

blocker.blend.zip

[PyrApple]

Indeed, and a hard one (most likely related to multithread based on the logs). searching...

[dingzeyuli]

Thanks for the feedback! When I move the source or listener slowly, the raytracer crashes much less frequently. I guess if the previous multi-threaded raytracing has not completed, new movement happens and triggers a new round of rays. This might have led to the crashing.

Besides the geometry built-in to blender, can I import custom shapes? I made a mesh with OpenSCAD and it seems the raytracer is not behaving correctly. Is there any requirement for the input mesh? mesh quality? topology limit?

office.stl.zip

[dingzeyuli]

@PyrApple:
After some trials, I realize the raytracer handles quad meshes much better than tri meshes. At least, no more penetration happens after I switch to quad mesh.

Yet, in the case of the a door and a hallway, the engine still fails. It either computes a wrong acoustic decay or crashes again like in the triangle mesh cases. I was wondering if you have some already-verified complex scene that I can play with? Something more complex than the square room? Thank you very much.

[PyrApple]

Quad vs Tri mesh, you're definitely right there. No official complex model that I can share for the moment, yet would be pleased to handle one of yours that highlights a bug in acoustic decay estimation. Would you mind opening a new thread on that and keep this one for the blocker issue?

[dingzeyuli]

@PyrApple Okay! I will upload my slightly more complex model in a new thread.

Since you have worked on this acoustic simulator for a while, are you aware of other similar project or software that has similar functionalities? Thanks a lot!

[PyrApple]

Non-exhaustive listing of auralization / spatialization software: EVERTims page on my personal website.