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:shipit: Wavefront obj parser for Rust

Home Page: https://docs.rs/obj-rs

License: Other

Rust 100.00%

rust wavefront glium crates

obj-rs's Introduction

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obj-rs's Issues

Coverage → 100%

Document `RawObj` in detail, Support higher order surfaces

Many OBJ files are not made out of triangles and this is a feature. If I load an OBJ to send to an high end offline renderer, the last thing I want is probably triangles (so I also do not want the reader to convert the OBJ to triangles, on-the-fly).

To support this, a third array is needed that has one integer, listing the number of vertices per each face. So you would have:

// Do whatever you want
model.vertices;
model.vertices_per_face;
model.indices;

This is an implicit part of the TODO 'support full OBJ/MTL spec'.

Which is actually a lot of work because then you also need to support higher order surfaces, e.g. NURBS, trim curves, bicubic patches etc. OBJ can store all of these and some apps (e.g. Maya) will also read and write such OBJs.

Support multiple group name

obj spec supports multiple group name since this project's current implementation of obj-rs doesn't.

g group_name1 group_name2 . . .
Polygonal and free-form geometry statement.

Specifies the group name for the elements that follow it. You can
have multiple group names. If there are multiple groups on one
line, the data that follows belong to all groups. Group information
is optional.

group_name is the name for the group. Letters, numbers, and
combinations of letters and numbers are accepted for group names.
The default group name is default.

Stricter compiler test

Reference:

https://github.com/PistonDevelopers/wavefront_obj/blob/master/src/lib.rs

#![unstable]
#![doc(html_root_url = "https://simnalamburt.github.io/obj-rs")]

#![deny(warnings)]
#![deny(missing_docs)]

Better support for custom vertex formats

As of current version, the loading interface looks like this:

pub fn load_obj<V: FromRawVertex<I>, T: BufRead, I>(input: T) -> ObjResult<Obj<V, I>>

so i'm like "yeah, i can plug my own vertex format too!", but when i look at the FromRawVertex trait, i see this:

pub trait FromRawVertex<I>: Sized {
    /// Build vertex and index buffer from raw object data.
    fn process(
        vertices: Vec<(f32, f32, f32, f32)>,
        normals: Vec<(f32, f32, f32)>,
        tex_coords: Vec<(f32, f32, f32)>,
        polygons: Vec<Polygon>,
    ) -> ObjResult<(Vec<Self>, Vec<I>)>;
}

and the vertex from raw conversion in done in an opaque way inside the library, so if I wanted to implement my own vertex format, I would have to re-write all this conversion code myself or copy-paste it from the source.

A better way support user-defined custom vertex formats would be proving a trait like:

pub trait FromRawVertex {
    type Output;

    fn convert_vertex(position: [f32; 4], normal: [f32; 3], tex_coord: [f32; 3]) -> Self::Output;
}

that can be used convert each vertex individually, then have a standalone conversion function like:

fn process_vertices<T: FromRawVertex, I>(raw: RawObj) -> ObjResult<(Vec<T::Output>, Vec<I>)>

Maybe i'm missing some stuff, but that's what I understood so far.

Panic on attempt to subtract with overflow

Found with honggfuzz.

extern crate obj;

use std::io::Cursor;

fn main() {
    let cursor = Cursor::new(b"\x70\x09\x2D\x31\x38");
    let _: Result<obj::Obj, obj::ObjError> = obj::load_obj(cursor);
}

thread 'main' panicked at 'attempt to subtract with overflow', /home/user/.cargo/git/checkouts/obj-rs-dfe6c4fd11f0b626/f37de06/src/raw/object.rs:40:9
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::print
             at libstd/sys_common/backtrace.rs:71
             at libstd/sys_common/backtrace.rs:59
   2: std::panicking::default_hook::{{closure}}
             at libstd/panicking.rs:211
   3: std::panicking::default_hook
             at libstd/panicking.rs:227
   4: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:463
   5: std::panicking::begin_panic_fmt
             at libstd/panicking.rs:350
   6: rust_begin_unwind
             at libstd/panicking.rs:328
   7: core::panicking::panic_fmt
             at libcore/panicking.rs:71
   8: core::panicking::panic
             at libcore/panicking.rs:51
   9: obj::raw::object::parse_obj::{{closure}}
             at /home/user/.cargo/git/checkouts/obj-rs-dfe6c4fd11f0b626/f37de06/src/raw/object.rs:40
  10: obj::raw::lexer::lex
             at /home/user/.cargo/git/checkouts/obj-rs-dfe6c4fd11f0b626/f37de06/src/raw/lexer.rs:49
  11: obj::raw::object::parse_obj
             at /home/user/.cargo/git/checkouts/obj-rs-dfe6c4fd11f0b626/f37de06/src/raw/object.rs:66
  12: obj::load_obj
             at /home/user/.cargo/git/checkouts/obj-rs-dfe6c4fd11f0b626/f37de06/src/lib.rs:50
  13: obj_load::main::{{closure}}
             at /home/user/daniel/targets/common/src/lib.rs:392
             at fuzzer-honggfuzz/src/bin/obj_load.rs:8
  14: honggfuzz::fuzz
             at /home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/honggfuzz-0.5.20/src/lib.rs:301
  15: obj_load::main
             at fuzzer-honggfuzz/src/bin/obj_load.rs:7
  16: std::rt::lang_start::{{closure}}
             at /checkout/src/libstd/rt.rs:74
  17: std::panicking::try::do_call
             at libstd/rt.rs:59
             at libstd/panicking.rs:310
  18: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:105
  19: std::rt::lang_start_internal
             at libstd/panicking.rs:289
             at libstd/panic.rs:374
             at libstd/rt.rs:58
  20: std::rt::lang_start
             at /checkout/src/libstd/rt.rs:74
  21: main
  22: __libc_start_main
  23: _start

Decide whether to support multiple object name statements

Obj spec p51 says:

Object name statements let you assign a name to an entire object in a single file.

Many 3d modeler seems to use multiple object name statements, even though spec doesn't define a behavior of it.

TODO list

TODOs

thread 'main' panicked at 'capacity overflow'

For given input file:
in.zip

The following code

use std::io::Cursor;
fn main(){
    let filepath = "<input file>"
    let data = std::fs::read(filepath).unwrap();
    let cursor = Cursor::new(data);
    let _: Result<obj::Obj, obj::ObjError> = obj::load_obj(cursor);
}

reports

thread 'main' panicked at 'capacity overflow', src/liballoc/raw_vec.rs:535:5
stack backtrace:
   0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
   1: core::fmt::write
   2: std::io::Write::write_fmt
   3: std::panicking::default_hook::{{closure}}
   4: std::panicking::default_hook
   5: std::panicking::rust_panic_with_hook
   6: rust_begin_unwind
   7: core::panicking::panic_fmt
   8: core::panicking::panic
   9: alloc::raw_vec::capacity_overflow
  10: alloc::raw_vec::RawVec<T,A>::reserve
             at /.../code/rust-compiler/src/liballoc/raw_vec.rs:301
  11: alloc::vec::Vec<T>::reserve
             at /.../code/rust-compiler/src/liballoc/vec.rs:505
  12: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T,I>>::spec_extend
             at /.../code/rust-compiler/src/liballoc/vec.rs:2136
  13: <alloc::vec::Vec<T> as core::iter::traits::collect::Extend<T>>::extend
             at /.../code/rust-compiler/src/liballoc/vec.rs:2063
  14: vec_map::VecMap<V>::insert
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/vec_map-0.8.2/src/lib.rs:540
  15: <vec_map::VecMap<V> as obj::raw::object::Map<usize,V>>::insert
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/object.rs:480
  16: obj::raw::object::GroupBuilder<T,K>::start::{{closure}}
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/object.rs:382
  17: obj::raw::object::GroupBuilder<T,K>::start
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/object.rs:377
  18: obj::raw::object::parse_obj::{{closure}}
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/object.rs:224
  19: obj::raw::lexer::lex
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/lexer.rs:40
  20: obj::raw::object::parse_obj
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/object.rs:102
  21: obj::load_obj
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/lib.rs:50
...

Error Handling

Design → http://doc.rust-lang.org/nightly/std/error/index.html
Remove all unimplemented!()
on read_line failure
Meaningful error message
1. Show line number on unexpected statement
2. Expected bla, but bla
Organize error.rs

Document how to use and customize `Obj` in detail

I'm trying to load an OBJ file that has been exported from FreeCAD. When doing so, I get the following error message:

LoadError { kind: InsufficientData, desc: "Tried to extract normal data which are not contained in the model" }

What does that mean? FreeCAD can open those files fine, are these normals required to load the file?

(Note: I'm only getting started with the OBJ format and don't have a lot of knowledge about it yet.)

Should load_obj panic on indicies that exceed the bounds of I

If we have an waveform file that has vertex indicies larger than the I number type that we supply it, we causing a panic, with no chance to potentially catch the error via an Err Result value. Should it return Err instead of hard panicking?

thread 'main' panicked at 'Unable to convert the index from usize', /home/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/obj-rs-0.7.1/src/lib.rs:277:30
stack backtrace:
   0: rust_begin_unwind
             at /rustc/8bdcc62cb0362869f0e7b43a6ae4f96b953d3cbc/library/std/src/panicking.rs:578:5
   1: core::panicking::panic_fmt
             at /rustc/8bdcc62cb0362869f0e7b43a6ae4f96b953d3cbc/library/core/src/panicking.rs:67:14
   2: core::panicking::panic_display
             at /rustc/8bdcc62cb0362869f0e7b43a6ae4f96b953d3cbc/library/core/src/panicking.rs:150:5
   3: core::panicking::panic_str
             at /rustc/8bdcc62cb0362869f0e7b43a6ae4f96b953d3cbc/library/core/src/panicking.rs:134:5
   4: core::option::expect_failed
             at /rustc/8bdcc62cb0362869f0e7b43a6ae4f96b953d3cbc/library/core/src/option.rs:1952:5
   5: core::option::Option<T>::expect
             at /rustc/8bdcc62cb0362869f0e7b43a6ae4f96b953d3cbc/library/core/src/option.rs:912:21
   6: <obj::TexturedVertex as obj::FromRawVertex<I>>::process::{{closure}}
             at /home/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/obj-rs-0.7.1/src/lib.rs:276:37
   7: <obj::TexturedVertex as obj::FromRawVertex<I>>::process
             at /home/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/obj-rs-0.7.1/src/lib.rs:294:52
   8: obj::Obj<V,I>::new
             at /home/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/obj-rs-0.7.1/src/lib.rs:71:13
   9: obj::load_obj
             at /home/user/.cargo/registry/src/index.crates.io-6f17d22bba15001f/obj-rs-0.7.1/src/lib.rs:52:5
  10: rust3d_test::main_with_err
             at ./src/main.rs:32:15
  11: rust3d_test::main
             at ./src/main.rs:40:11
  12: core::ops::function::FnOnce::call_once
             at /rustc/8bdcc62cb0362869f0e7b43a6ae4f96b953d3cbc/library/core/src/ops/function.rs:250:5

High level abstraction of material specifiction

If we manage to parse the material information of Wavefront OBJ, most usecases of Wavefront OBJ format will be satisfied.

Update example for newer versions/editions of rust?

Get replicated vertices when reading obj

When I tried to use obj-rs to read my bunny.obj, I found that instead of giving triangles that share vertices, it gives me a bunch of triangles with their own vertices that has different indices. For example, I have two triangles (1,2,3 and 1,3,4) and 4 vertices, then I will expect the Vec of indices contains 0,1,2,0,2,3 instead of 0,1,2,3,4,5. This behavior is abnormal, but I don't know if it's a bug for certain obj files.

My bunny obj is as follows:

Click to expand!

o Bunny
v -0.038632 0.002788 -0.167867
v -0.037523 0.025944 -0.124042
v 0.043233 -0.006456 -0.089594
v -0.026748 0.038619 -0.109750
v -0.063449 -0.017938 -0.097112
v -0.025891 0.049042 -0.048891
v 0.045346 0.023076 -0.082603
v 0.006619 0.050356 -0.047417
v -0.040710 0.039629 -0.050423
v -0.006309 0.052597 -0.051457
v -0.064662 0.036264 -0.151974
v -0.018605 0.047107 -0.049922
v -0.000094 0.054278 -0.052014
v 0.009410 0.052895 -0.060149
v 0.000322 0.054484 -0.058135
v -0.085941 0.049068 -0.125175
v -0.027746 0.037498 -0.064856
v 0.003858 0.056777 -0.062044
v -0.077835 0.043808 -0.145715
v -0.005881 0.056478 -0.062411
v -0.047781 0.037342 -0.063839
v 0.011484 0.034270 -0.123198
v -0.062211 -0.005052 -0.147546
v -0.012589 0.054415 -0.069082
v -0.005859 -0.037176 -0.087537
v 0.000030 0.056492 -0.068579
v -0.016743 0.030848 -0.123139
v -0.071191 0.001279 -0.155859
v 0.044646 0.024242 -0.069351
v -0.045986 0.042256 -0.073503
v -0.038661 0.041795 -0.063179
v -0.003043 0.059461 -0.073778
v -0.019943 -0.015950 -0.187176
v -0.076123 -0.018367 -0.163992
v -0.011270 0.036868 -0.120275
v 0.009089 0.054966 -0.080660
v -0.017682 0.057622 -0.082305
v -0.078078 0.029078 -0.154685
v -0.050393 0.046102 -0.085761
v -0.075260 0.053502 -0.127230
v -0.042039 0.042519 -0.084825
v -0.007645 0.058188 -0.079109
v -0.074281 0.053631 -0.117286
v -0.065353 0.044968 -0.085654
v -0.059945 0.041788 -0.074585
v -0.037174 0.043756 -0.081950
v -0.003971 0.033251 -0.124981
v -0.026922 -0.007884 -0.181455
v -0.032593 -0.005142 -0.177828
v -0.030548 0.043284 -0.087232
v -0.012103 0.056667 -0.092198
v -0.036983 0.044193 -0.092657
v 0.005296 0.057126 -0.086140
v 0.019647 0.049574 -0.086817
v -0.038692 0.033305 -0.115422
v -0.070146 0.042620 -0.089763
v -0.018226 0.036486 -0.117876
v -0.059685 0.036516 -0.147446
v -0.050053 0.044423 -0.096180
v -0.072540 0.041270 -0.095957
v -0.056884 0.045348 -0.092762
v -0.040294 0.041786 -0.098952
v 0.006439 0.014596 -0.132232
v -0.053895 0.043345 -0.097200
v 0.023359 0.046777 -0.095899
v -0.011316 0.002910 -0.129221
v -0.046949 -0.021920 -0.093514
v -0.059835 0.042689 -0.102266
v -0.029833 0.043080 -0.101135
v 0.011888 0.047452 -0.102476
v -0.046466 0.003131 -0.167133
v -0.065862 -0.001908 -0.153866
v -0.044387 0.040714 -0.106839
v -0.018030 0.042558 -0.106099
v -0.046574 0.009349 -0.153815
v -0.047007 0.042698 -0.099425
v -0.008282 0.043830 -0.101652
v -0.006486 0.043970 -0.108283
v 0.021424 0.031182 -0.121505
v 0.017255 0.039746 -0.109608
v 0.023135 0.021213 -0.125159
v -0.050136 0.037566 -0.110464
v -0.073907 -0.047586 -0.171564
v 0.018182 0.042512 -0.036268
v -0.054330 -0.022408 -0.097111
v 0.026269 0.030992 -0.039553
v -0.029066 -0.024545 -0.093469
v -0.039288 0.041301 -0.044575
v -0.006058 0.047354 -0.045881
v -0.066457 0.037295 -0.110304
v -0.021404 0.053215 -0.045562
v 0.017650 0.044185 -0.043039
v -0.040635 0.002471 -0.159922
v 0.011322 0.044806 -0.045022
v 0.049174 0.021629 -0.044307
v 0.028021 0.036458 -0.046282
v 0.033645 0.031488 -0.049093
v -0.011129 -0.027227 -0.182158
v -0.054071 0.038080 -0.123768
v 0.020741 0.048100 -0.055550
v 0.023003 0.039928 -0.049323
v -0.049505 0.036331 -0.050280
v 0.035495 -0.011159 -0.103128
v 0.059989 0.021516 -0.062227
v 0.013667 0.050689 -0.055693
v 0.043020 0.032996 -0.049120
v 0.053744 0.027754 -0.054858
v -0.049178 0.030288 -0.130401
v -0.028849 -0.003816 -0.162315
v -0.036101 0.004249 -0.158265
v -0.089109 0.008227 -0.099057
v 0.026136 0.044245 -0.060229
v 0.034320 0.039225 -0.060597
v -0.013982 -0.021269 -0.178957
v 0.012129 0.053747 -0.065567
v 0.020511 0.048451 -0.065463
v 0.028693 0.034550 -0.111728
v 0.002438 0.041742 -0.114145
v -0.030297 -0.007023 -0.121635
v 0.039845 0.030392 -0.059964
v 0.051687 0.029555 -0.064527
v 0.039512 0.033551 -0.070945
v 0.007651 0.056504 -0.075327
v 0.026908 0.043296 -0.070176
v 0.032967 0.041811 -0.077598
v 0.040252 0.026220 -0.102372
v -0.060796 0.042799 -0.125745
v -0.022318 -0.012616 -0.181221
v -0.062587 0.036031 -0.137282
v -0.068515 0.047795 -0.132239
v 0.015592 0.054165 -0.078141
v -0.063799 0.038920 -0.143909
v -0.065799 0.051999 -0.120921
v -0.033558 -0.001108 -0.173613
v -0.049240 0.031545 -0.118066
v -0.068718 0.050433 -0.114088
v -0.062044 0.037354 -0.114243
v 0.027865 0.039124 -0.103405
v -0.055094 0.035233 -0.114335
v 0.026730 0.047114 -0.079214
v -0.009970 -0.017702 -0.167686
v -0.033646 -0.004786 -0.165935
v -0.069930 0.046209 -0.141590
v 0.039804 0.033495 -0.089822
v -0.024682 -0.001088 -0.159952
v 0.009088 0.049418 -0.097645
v -0.045252 0.025016 -0.122806
v -0.048532 0.006514 -0.143887
v 0.014126 0.052728 -0.090787
v 0.034274 0.040805 -0.091666
v 0.041527 -0.003903 -0.097216
v -0.084037 0.004810 -0.145378
v 0.019655 -0.003456 -0.035085
v -0.089659 0.017847 -0.099833
v 0.016325 -0.018314 -0.035201
v 0.020591 -0.020978 -0.043659
v 0.022728 -0.005642 -0.039972
v 0.056546 0.018075 -0.049738
v 0.022565 -0.018540 -0.045669
v -0.014554 -0.010082 -0.162843
v 0.028058 -0.018234 -0.049173
v -0.061903 -0.029073 -0.152590
v 0.057159 0.007605 -0.050804
v 0.053557 -0.003559 -0.058091
v -0.036286 0.000402 -0.151198
v 0.061282 0.008052 -0.060979
v 0.038928 -0.010753 -0.064147
v 0.030796 -0.007779 -0.048804
v -0.088206 0.003366 -0.135559
v -0.061651 -0.019788 -0.157813
v 0.030795 -0.017734 -0.058601
v 0.021937 -0.027055 -0.055669
v -0.094871 0.022189 -0.122902
v 0.042068 -0.002158 -0.063212
v -0.068864 -0.053205 -0.156533
v 0.041049 0.006150 -0.106185
v -0.051989 0.018310 -0.142827
v -0.086972 -0.001898 -0.121397
v -0.025615 -0.003544 -0.156162
v -0.053935 0.028353 -0.139875
v 0.031952 -0.018709 -0.069103
v -0.092423 0.016676 -0.113974
v 0.039220 -0.010108 -0.077501
v 0.046713 0.005563 -0.072341
v -0.076643 -0.008679 -0.149485
v 0.045163 0.008717 -0.095673
v -0.091672 0.028069 -0.117524
v 0.044133 -0.002522 -0.080232
v 0.037727 -0.016367 -0.085584
v -0.062777 -0.047210 -0.161085
v -0.093435 0.042248 -0.121095
v -0.067905 -0.043985 -0.173751
v -0.063846 -0.058948 -0.180771
v 0.000053 0.053297 -0.097862
v -0.082061 0.013629 -0.154804
v -0.086549 0.015694 -0.109000
v -0.091717 0.017134 -0.141326
v -0.092111 0.031104 -0.128137
v -0.063020 -0.045257 -0.168283
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vn 0.7193 0.2096 0.6623
s off
f 195//1 206//1 28//1
f 202//2 225//2 224//2
f 192//3 221//3 199//3
f 225//4 201//4 27//4
f 71//5 1//5 134//5
f 66//6 224//6 63//6
f 63//7 227//7 66//7
f 212//8 324//8 326//8
f 229//9 281//9 228//9
f 195//10 28//10 274//10
f 242//11 222//11 192//11
f 40//12 262//12 16//12
f 19//13 256//13 262//13
f 321//14 111//14 196//14
f 3//15 184//15 188//15
f 151//16 186//16 3//16
f 165//17 403//17 503//17
f 196//18 182//18 321//18
f 19//19 262//19 143//19
f 182//20 327//20 321//20
f 316//21 302//21 400//21
f 409//22 408//22 393//22
f 393//23 380//23 386//23
f 151//24 176//24 186//24
f 423//25 406//25 411//25
f 133//26 40//26 43//26
f 212//27 326//27 154//27
f 351//28 360//28 166//28
f 400//29 404//29 316//29
f 486//30 494//30 88//30
f 486//31 482//31 474//31
f 90//32 260//32 60//32
f 173//33 288//33 327//33
f 188//34 174//34 167//34
f 90//35 60//35 68//35
f 503//36 508//36 179//36
f 18//37 15//37 14//37
f 8//38 89//38 94//38
f 202//39 224//39 66//39
f 68//40 60//40 56//40
f 36//41 32//41 26//41
f 18//42 14//42 115//42
f 132//43 11//43 143//43
f 18//44 20//44 15//44
f 14//45 13//45 8//45
f 201//46 225//46 2//46
f 149//47 146//47 53//47
f 61//48 56//48 44//48
f 118//49 78//49 214//49
f 70//50 146//50 54//50
f 225//51 220//51 224//51
f 64//52 56//52 61//52
f 68//53 56//53 64//53
f 326//54 324//54 318//54
f 28//55 72//55 221//55
f 214//56 78//56 77//56
f 15//57 13//57 14//57
f 44//58 45//58 61//58
f 139//59 137//59 90//59
f 158//60 450//60 163//60
f 224//61 220//61 63//61
f 82//62 139//62 90//62
f 70//63 214//63 146//63
f 39//64 61//64 45//64
f 82//65 90//65 68//65
f 194//66 213//66 51//66
f 355//67 176//67 103//67
f 120//68 106//68 121//68
f 172//69 171//69 377//69
f 281//70 229//70 102//70
f 59//71 64//71 61//71
f 76//72 68//72 64//72
f 82//73 68//73 76//73
f 323//74 269//74 447//74
f 30//75 39//75 45//75
f 76//76 64//76 59//76
f 53//77 194//77 51//77
f 217//78 71//78 240//78
f 39//79 59//79 61//79
f 8//80 13//80 10//80
f 106//81 120//81 97//81
f 271//82 197//82 200//82
f 15//83 10//83 13//83
f 88//84 102//84 229//84
f 222//85 221//85 192//85
f 82//86 76//86 73//86
f 75//87 71//87 217//87
f 117//88 22//88 80//88
f 62//89 76//89 59//89
f 53//90 42//90 36//90
f 20//91 10//91 15//91
f 485//92 509//92 309//92
f 102//93 88//93 9//93
f 39//94 30//94 41//94
f 59//95 39//95 41//95
f 1//96 71//96 75//96
f 34//97 28//97 222//97
f 47//98 35//98 118//98
f 30//99 21//99 31//99
f 41//100 30//100 46//100
f 82//101 73//101 55//101
f 147//102 82//102 55//102
f 103//103 176//103 151//103
f 75//104 93//104 1//104
f 62//105 59//105 41//105
f 62//106 73//106 76//106
f 403//107 502//107 500//107
f 214//108 70//108 80//108
f 52//109 41//109 46//109
f 52//110 62//110 41//110
f 55//111 73//111 62//111
f 46//112 30//112 238//112
f 69//113 62//113 52//113
f 157//114 153//114 155//114
f 238//115 30//115 31//115
f 2//116 55//116 201//116
f 80//117 118//117 214//117
f 148//118 403//118 165//118
f 17//119 31//119 9//119
f 50//120 52//120 46//120
f 115//121 26//121 18//121
f 50//122 46//122 238//122
f 123//123 26//123 115//123
f 238//124 31//124 17//124
f 55//125 62//125 4//125
f 201//126 55//126 4//126
f 163//127 446//127 379//127
f 14//128 8//128 105//128
f 62//129 69//129 4//129
f 17//130 9//130 250//130
f 258//131 69//131 52//131
f 27//132 57//132 35//132
f 36//133 42//133 32//133
f 258//134 52//134 50//134
f 280//135 236//135 231//135
f 220//136 47//136 22//136
f 498//137 510//137 175//137
f 6//138 230//138 91//138
f 220//139 22//139 204//139
f 201//140 4//140 57//140
f 12//141 250//141 6//141
f 292//142 197//142 209//142
f 489//143 245//143 280//143
f 220//144 204//144 63//144
f 74//145 69//145 258//145
f 186//146 184//146 3//146
f 63//147 359//147 227//147
f 4//148 69//148 74//148
f 336//149 509//149 23//149
f 12//150 6//150 91//150
f 288//151 210//151 327//151
f 169//152 210//152 288//152
f 74//153 258//153 259//153
f 57//154 4//154 74//154
f 47//155 118//155 22//155
f 18//156 26//156 20//156
f 36//157 26//157 123//157
f 243//158 37//158 51//158
f 181//159 410//159 348//159
f 166//160 360//160 207//160
f 51//161 248//161 243//161
f 24//162 265//162 263//162
f 37//163 265//163 24//163
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Better test codes

Current:

obj.groups["default".to_string()]

Should be:

obj.groups.get("default")
// or other..

Load larger models

Apologies for opening another "issue", but when loading extremely large models using load_obj(), I keep getting the

'Unable to convert the index from usize'

error. The documentation isn't very clear on load_obj, so how can I load larger models?

Thank you.

Seemingly no way to use include_bytes! for a file

Self explanatory. Loading an obj requires file::open, and has no option from loading from include_bytes!().

No 'TODO'

Test FAil

Contain code that will be rejected by a future version of Rust

When I build my project which dependents on this crate, the compiler reports that:

warning: the following packages contain code that will be rejected by a future version of Rust: obj-rs v0.7.0
note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`

Some OBJ specifications are not implemented yet

For given input file:
in.zip

The following code

use std::io::Cursor;
fn main(){
    let filepath = "<input file>"
    let data = std::fs::read(filepath).unwrap();
    let cursor = Cursor::new(data);
    let _: Result<obj::Obj, obj::ObjError> = obj::load_obj(cursor);
}

reports

thread 'main' panicked at 'not implemented', ...
stack backtrace:
   0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
   1: core::fmt::write
   2: std::io::Write::write_fmt
   3: std::panicking::default_hook::{{closure}}
   4: std::panicking::default_hook
   5: std::panicking::rust_panic_with_hook
   6: std::panicking::begin_panic
             at /.../code/rust-compiler/src/libstd/panicking.rs:456
   7: obj::raw::object::parse_obj::{{closure}}
             at /.../code/rust-compiler/src/libstd/macros.rs:13
   8: obj::raw::lexer::lex
             at /.../.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/lexer.rs:40
   9: obj::raw::object::parse_obj
             at /home/szx5097/.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/raw/object.rs:102
  10: obj::load_obj
             at /home/szx5097/.cargo/registry/src/github.com-1ecc6299db9ec823/obj-rs-0.6.3/src/lib.rs:50
...

decrement indicies in Point, Line, Polygon

obj file uses 1-based index but we have to convert it into 0-based index

Decrement each values in Point, Line and Polygon

Texture Coordinates

Are texture coordinates loaded? I don't see them anywhere in the output structs.

How many characters should I treat as a whitespace

Current spec:

whitespace ← ' ', '\t', '\r'

Reference:

Try implement many traits

Candidates: Eq, PartialEq, Clone, Debug

Reference

https://doc.rust-lang.org/rust-by-example/trait/derive.html

the trait `glium::Vertex` is not implemented for `obj::TexturedVertex`

obj-rs = {version = "*", features = ["glium-support"]}, that is my dependecy in my Cargo.toml. Cant pass the vertices to the vertex buffers. Apologies for my poor english

Prepare Rust 1.1.0

Are materials going to be supported?

AppVeyor

Reference

https://github.com/simnalamburt/utime/blob/master/appveyor.yml

Are there any plans to support writing

I am wondering if there are any plans to implement support for writing obj files? I could probably help out if there is any interest.

Drop rustc-serialize dependency

It has been deprecated: announcement.

Is there any functionality you would require from Serde or another library before this would be possible?

glium-support has been broken

Compiling with glium-support feature fails due to dependencies.

CI 'sampleapp-volkano'

"sampleapp-volkano" is currently not under CI

Why f32x4

Remove redundant f32x4

Handle backslash (\)

obj codes below are all identical

bmat u  1       -3      3       -1      \
        0       3       -6      3       \
        0       0       3       -3      \
        0       0       0       1

bmat u  1       -3      3       -1      0       3       -6      3       \
        0       0       3       -3      0       0       0       1

bmat u  1       -3      3       -1      0       3       -6      3       0       0       3       -3      0       0       0       1

pub struct Obj<V = Vertex> {
    /// Object's name.
    pub name: Option<String>,
    /// Vertex buffer.
    pub vertices: Vec<V>,
    /// Index buffer.
    pub indices: Vec<u32>,
}

Perhaps mention in the readme that the corresponding OpenGL calls have to take GL_UNSIGNED_INT.

gl::BindBuffer(gl::ELEMENT_ARRAY_BUFFER, self.ebo);
gl::DrawElements(gl::TRIANGLES, indices.len() as i32, gl::UNSIGNED_INT, ptr::null());

Type structure

Goals

Ease of use
Beauty
SIMD aware

Low-level API

Low-level API provides one-to-one correspondent rust binding of obj format.

Obj
　name ← String
　required mtl files ← Vec

　vertices ← Vec
　texture coordinates ← Vec
　normals ← Vec
　parametric vertices ← Vec

　points ← Vec
　lines ← Vec
　polygons ← Vec

　groups ← HashMap<String, Group>
　meshes ← HashMap<String, Group>
　smoothing_groups ← VecMap
　merging_groups ← VecMap

Other types

Point ← index of vertex

Line ← [(index of vertex); 2]
Line ← [(index of vertex, index of texture coordinate); 2]

Polygon ← Vec
Polygon ← Vec<(index of vertex, index of texture coordinate)>
Polygon ← Vec<(index of vertex, index of normal)>
Polygon ← Vec<(index of vertex, index of texture coordinate, index of normal)>

Group
　points ← Vec
　lines ← Vec
　polygon ← Vec

Range
　start ← uint
　end ← uint

Current version of Rust doesn't support non-power-of-2 simd type

High-level API

High-level API wraps low-level API and makes it easy to interoperate with OpenGL. It triangulates polygons, normalizes indices, etc.

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