Parses .off (Object File Format) files. This implementation follows this spec from the Princeton Shape Benchmark.

Michael Lohr

Last update: Jun 12, 2022

Related tags

Utilities off-3d-format-mesh

Overview

off-rs - A simple .off file parser

Parses .off (Object File Format) files. This implementation follows this spec from the Princeton Shape Benchmark.

Sample .off file:

# this file header has to be the first instruction
OFF
# cube.off
# A cube

# 8 vertices, 6 faces, 12 edges
8 6 12

# vetex coordinates: x, y, z
  1.632993   0.000000   1.154701
  0.000000   1.632993   1.154701
 -1.632993   0.000000   1.154701
  0.000000  -1.632993   1.154701
  1.632993   0.000000  -1.154701
  0.000000   1.632993  -1.154701
 -1.632993   0.000000  -1.154701
  0.000000  -1.632993  -1.154701

# face indicies & RGBA color data: n, v1, v2, v3, v4, r, g, b, a
  4  0 1 2 3  1.000 0.000 0.000 0.75
  4  7 4 0 3  0.300 0.400 0.000 0.75
  4  4 5 1 0  0.200 0.500 0.100 0.75
  4  5 6 2 1  0.100 0.600 0.200 0.75
  4  3 2 6 7  0.000 0.700 0.300 0.75
  4  6 5 4 7  0.000 1.000 0.000 0.75

This cube.off file is parsed using off-rs in this example.

Usage

let mesh = Mesh::parse(
    content,
    ..Default::default() // optional ParserOptions
);

println!("{:#?}", mesh);

Will return a structure like this:

Mesh {
    vertices: [
        Vertex {
            position: Position {
                x: 1.632993,
                y: 0.0,
                z: 1.154701,
            },
            color: None,
        },
        ...
    faces: [
        Face {
            vertices: [
                0,
                1,
                2,
                3,
            ],
            color: Some(
                Color {
                    r: 1.0,
                    g: 0.0,
                    b: 0.0,
                    a: 0.75,
                },
            ),
        },
        ...

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Comments

Simple parse benchmark
DRAFT: DONT MERGE YET

Implemented a simple criterion benchmark which times the parsing of documents.

The main use is/(can be) to catch regressions when new code is added.

To run the benchmarks execute the following:

cargo bench
opened by Shemnei 3
Fuzzing
Added simple fuzz case for parsing random inputs.

I found some crashes/panics with it, but they will be fixed on another branch.

To run the fuzz case:

# Install cargo-fuzz # cargo install cargo-fuzz # Run fuzz case cargo fuzz run try_parse

Further documentation: https://rust-fuzz.github.io/book/introduction.html
opened by Shemnei 1

Parses .off (Object File Format) files. This implementation follows this spec from the Princeton Shape Benchmark.

Related tags

Overview

off-rs - A simple .off file parser

Usage

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Comments

Simple parse benchmark

Fuzzing

Owner

Michael Lohr

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