[panic] in BVHAccel::recursive_build()
wahn opened this issue · 2 comments
wahn commented
> pwd
/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/coffee-splash
> ~/git/github/rs_pbrt/target/release/examples/rs_pbrt -i f15-5.pbrt
pbrt version 0.5.3 [Detected 8 cores]
Copyright (c) 2016-2019 Jan Douglas Bert Walter.
Rust code based on C++ code by Matt Pharr, Greg Humphreys, and Wenzel Jakob.
Sampler "sobol"
"integer pixelsamples" [8]
Integrator "volpath"
"integer maxdepth" [25]
Film "image"
"string filename" ["f15-5.exr"]
"integer xresolution" [1000]
"integer yresolution" [800]
"float scale" [2]
Include "/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/coffee-splash/materials.pbrt"
reading "bsdfs/ceramic.bsdf" returns true
Include "/mill3d/users/jan/Graphics/Rendering/PBRT/pbrt-v3-scenes/coffee-splash/geometry.pbrt"
reading "bsdfs/ceramic.bsdf" returns true
BVHAccel::recursive_build(..., 0, ...)
thread 'main' panicked at 'assertion failed: `(left != right)`
left: `0`,
right: `0`', src/accelerators/bvh.rs:210:9
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.wahn commented
On the C++ side we can set a breakpoint here (in src/shapes/plymesh.cpp):
B+ │285 return CreateTriangleMesh(o2w, w2o, reverseOrientation,
│286 context.indexCtr / 3, context.indices,
│287 vertexCount, context.p, nullptr, context.n,
│288 context.uv, alphaTex, shadowAlphaTex,
>│289 context.faceIndices);At that point we have read 3970 vertices and 23808 indices (divided by 3, means 7936 triangles):
(gdb) p context.indexCtr
$3 = 23808
(gdb) p vertexCount
$7 = 3970Debugging the Rust side (in shapes/plymesh.rs):
let mesh = Arc::new(TriangleMesh::new(
*o2w,
*w2o,
reverse_orientation,
tm_vertex_indices.len() / 3, // n_triangles
tm_vertex_indices,
n_vertices,
p_ws, // in world space
s_ws, // in world space
n_ws, // in world space
uvs,
)); We find the same amount of read vertices:
(gdb) p n_vertices
$15 = 3970But the vertex indices are missing!!!
(gdb) p tm_vertex_indices
$16 = Vec<usize>(len: 0, cap: 0)