Comments (1)
madmann91
commented on May 25, 2024
1
If you need that information for traversal, I recommend using a method that intersects the two children and sorts them based on their distance instead. Otherwise, this information can be obtained by either one of two options:
- Recovering it from the two bounding boxes and choosing the axis which minimizes
min(min2 - max1, min1 - max2)(the overlap between the two children) - Storing it somewhere by packing it in the BVH node during construction. Since this is not used in the current design, and would take up useful bits from the BVH layout, it is not currently done and would require hacking the library a little.
Also, keep in mind that there might not be any split axis for other builders (e.g. ordered clustering), and that reinsertion will interfere with option 2. In general, BVHs need not be split along one axis, they just have to partition the set of objects in some way.
I hope this answered your question. If not, please re-open.
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Related Issues (20)
- raw, bvh node data to upload to the gpu HOT 1
- `build()` in debug build of v2 feels slower than v1 HOT 2
- Face culling options? HOT 1
- Your code is building fine on MSYS2 MINGW64 HOT 1
- Two tests need pthread to compile on linux HOT 2
- Library does not handle rays parallel to axes HOT 5
- Identifiers near and far in bvh.h cause issues when precompiled headers are used HOT 3
- config.min_leaf_size > 1 Leads to assertion failure HOT 1
- What is the use case? is it slower than embree? HOT 1
- Cancel build +progress monitor HOT 4
- Consider adding to vcpkg HOT 1
- Ability to re-use BVH allocations? HOT 1
- Adding and Removing elements HOT 1
- Optimize node index serialization HOT 1
- Clarify what primitive data leaf nodes actually store HOT 1
- Potential bug in traversal functions HOT 1
- Possible stale pointer usage in extract_bvh()? HOT 4
- Sweep SAH builder HOT 4
- ReinsertionOptimizer sometimes gets stuck in an infinite loop HOT 16
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