Function tobj::load_obj_buf

pub fn load_obj_buf<B, ML>(
    reader: &mut B,
    load_options: &LoadOptions,
    material_loader: ML
) -> LoadResult where
    B: BufRead,
    ML: Fn(&Path) -> MTLLoadResult, 

Load the various meshes in an OBJ buffer.

This could e.g. be a network stream, a text file already in memory etc.

Arguments

You must pass a material_loader function, which will return a material given a name.

A trivial material loader may just look at the file name and then call load_mtl_buf with the in-memory MTL file source.

Alternatively it could pass an MTL file in memory to load_mtl_buf to parse materials from some buffer.

• load_options – Governs on-the-fly processing of the mesh during loading. See LoadOptions for more information.

Example

The test for load_obj_buf includes the OBJ and MTL files as strings and uses a Cursor to provide a BufRead interface on the buffer.

use std::{env, fs::File, io::BufReader};

let dir = env::current_dir().unwrap();
let mut cornell_box_obj = dir.clone();
cornell_box_obj.push("obj/cornell_box.obj");
let mut cornell_box_file = BufReader::new(File::open(cornell_box_obj.as_path()).unwrap());

let mut cornell_box_mtl1 = dir.clone();
cornell_box_mtl1.push("obj/cornell_box.mtl");

let mut cornell_box_mtl2 = dir.clone();
cornell_box_mtl2.push("obj/cornell_box2.mtl");

let m = tobj::load_obj_buf(
    &mut cornell_box_file,
    &tobj::LoadOptions {
        triangulate: true,
        single_index: true,
        ..Default::default()
    },
    |p| match p.file_name().unwrap().to_str().unwrap() {
        "cornell_box.mtl" => {
            let f = File::open(cornell_box_mtl1.as_path()).unwrap();
            tobj::load_mtl_buf(&mut BufReader::new(f))
        }
        "cornell_box2.mtl" => {
            let f = File::open(cornell_box_mtl2.as_path()).unwrap();
            tobj::load_mtl_buf(&mut BufReader::new(f))
        }
        _ => unreachable!(),
    },
);