tobj 0.0.8

A lightweight OBJ loader in the spirit of tinyobjloader
Documentation 
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extern crate tobj;

use std::path::Path;

#[test]
fn simple_triangle() {
    let m = tobj::load_obj(&Path::new("triangle.obj"));
    assert!(m.is_ok());
    let (models, mats) = m.unwrap();
	// We expect a single model with no materials
	assert_eq!(models.len(), 1);
	assert!(mats.is_empty());
	// Confirm our triangle is loaded correctly
	assert_eq!(models[0].name, "Triangle");
	let mesh = &models[0].mesh;
	assert!(mesh.normals.is_empty());
	assert!(mesh.texcoords.is_empty());
	assert_eq!(mesh.material_id, None);

	// Verify each position is loaded properly
	let expect_pos = vec![
		0.0, 0.0, 0.0,
		1.0, 0.0, 0.0,
		0.0, 1.0, 0.0
	];
	assert_eq!(mesh.positions, expect_pos);
	// Verify the indices are loaded properly
	let expect_idx = vec![0, 1, 2];
	assert_eq!(mesh.indices, expect_idx);
}

#[test]
fn multiple_face_formats() {
    let m = tobj::load_obj(&Path::new("quad.obj"));
    assert!(m.is_ok());
    let (models, mats) = m.unwrap();
	assert_eq!(models.len(), 3);
	assert!(mats.is_empty());
	
	// Confirm each object in the file was loaded properly
	assert_eq!(models[0].name, "Quad");
	let quad = &models[0].mesh;
	assert!(quad.normals.is_empty());
	assert_eq!(quad.material_id, None);
	let quad_expect_pos = vec![
		0.0, 1.0, 0.0,
		0.0, 0.0, 0.0,
		1.0, 0.0, 0.0,
		1.0, 1.0, 0.0,
	];
	let quad_expect_tex = vec![
		0.0, 1.0,
		0.0, 0.0,
		1.0, 0.0,
		1.0, 1.0,
	];
	let quad_expect_idx = vec![0, 1, 2, 0, 2, 3];
	assert_eq!(quad.positions, quad_expect_pos);
	assert_eq!(quad.texcoords, quad_expect_tex);
	assert_eq!(quad.indices, quad_expect_idx);

	assert_eq!(models[1].name, "Quad_face");
	let quad_face = &models[1].mesh;
	let quad_expect_normals = vec![
		0.0, 0.0, 1.0,
		0.0, 0.0, 1.0,
		0.0, 0.0, 1.0,
		0.0, 0.0, 1.0,
	];
	assert_eq!(quad_face.material_id, None);
	assert_eq!(quad_face.positions, quad_expect_pos);
	assert_eq!(quad_face.texcoords, quad_expect_tex);
	assert_eq!(quad_face.normals, quad_expect_normals);
	assert_eq!(quad_face.indices, quad_expect_idx);

	assert_eq!(models[2].name, "Tri_v_vn");
	let tri = &models[2].mesh;
	let tri_expect_pos = vec![
		0.0, 1.0, 0.0,
		0.0, 0.0, 0.0,
		1.0, 0.0, 0.0,
	];
	let tri_expect_normals = vec![
		0.0, 0.0, 1.0,
		0.0, 0.0, 1.0,
		0.0, 0.0, 1.0,
	];
	let tri_expect_idx = vec![0, 1, 2];
	assert_eq!(tri.material_id, None);
	assert_eq!(tri.positions, tri_expect_pos);
	assert_eq!(tri.normals, tri_expect_normals);
	assert_eq!(tri.indices, tri_expect_idx);
	assert!(tri.texcoords.is_empty());
}

#[test]
fn test_cornell() {
    let m = tobj::load_obj(&Path::new("cornell_box.obj"));
    assert!(m.is_ok());
    let (models, mats) = m.unwrap();
	assert_eq!(models.len(), 8);
	assert_eq!(mats.len(), 5);

	// Verify the floor loaded properly
	assert_eq!(models[0].name, "floor");
	let mesh = &models[0].mesh;
	assert_eq!(mesh.material_id, Some(0));
	let expect_indices = vec![
		0, 1, 2, 0, 2, 3, 4, 5, 6,
		4, 6, 7, 8, 9, 10, 8, 10, 11
	];
	// Will this be an issue with floating point precision?
	let expect_verts = vec![
		552.799988, 0.000000, 0.000000,
		0.000000, 0.000000, 0.000000,
		0.000000, 0.000000, 559.200012,
		549.599976, 0.000000, 559.200012,
		290.000000, 0.000000, 114.000000,
		240.000000, 0.000000, 272.000000,
		82.000000, 0.000000, 225.000000,
		130.000000, 0.000000, 65.000000,
		472.000000, 0.000000, 406.000000,
		314.000000, 0.000000, 456.000000,
		265.000000, 0.000000, 296.000000,
		423.000000, 0.000000, 247.000000
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify the light loaded properly
	assert_eq!(models[1].name, "light");
	let mesh = &models[1].mesh;
	assert_eq!(mesh.material_id, Some(3));
	let expect_indices = vec![0, 1, 2, 0, 2, 3];
	let expect_verts = vec![
		343.000000, 548.000000, 227.000000,
		343.000000, 548.000000, 332.000000,
		213.000000, 548.000000, 332.000000,
		213.000000, 548.000000, 227.000000,
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify the ceiling loaded properly
	assert_eq!(models[2].name, "ceiling");
	let mesh = &models[2].mesh;
	assert_eq!(mesh.material_id, Some(0));
	let expect_verts = vec![
		556.000000, 548.799988, 0.000000,
		556.000000, 548.799988, 559.200012,
		0.000000, 548.799988, 559.200012,
		0.000000, 548.799988, 0.000000,
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify the back wall loaded properly
	assert_eq!(models[3].name, "back_wall");
	let mesh = &models[3].mesh;
	assert_eq!(mesh.material_id, Some(0));
	let expect_verts = vec![
		549.599976, 0.000000, 559.200012,
		0.000000, 0.000000, 559.200012,
		0.000000, 548.799988, 559.200012,
		556.000000, 548.799988, 559.200012,
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify the green wall loaded properly
	assert_eq!(models[4].name, "green_wall");
	let mesh = &models[4].mesh;
	assert_eq!(mesh.material_id, Some(4));
	let expect_verts = vec![
		0.000000, 0.000000, 559.200012,
		0.000000, 0.000000, 0.000000,
		0.000000, 548.799988, 0.000000,
		0.000000, 548.799988, 559.200012,
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify the red wall loaded properly
	assert_eq!(models[5].name, "red_wall");
	let mesh = &models[5].mesh;
	assert_eq!(mesh.material_id, Some(1));
	let expect_verts = vec![
		552.799988, 0.000000, 0.000000,
		549.599976, 0.000000, 559.200012,
		556.000000, 548.799988, 559.200012,
		556.000000, 548.799988, 0.000000,
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify the short block loaded properly
	assert_eq!(models[6].name, "short_block");
	let mesh = &models[6].mesh;
	assert_eq!(mesh.material_id, Some(0));
	let expect_indices = vec![
		0, 1, 2,
		0, 2, 3,
		4, 5, 6,
		4, 6, 7,
		8, 9, 10,
		8, 10, 11,
		12, 13, 14,
		12, 14, 15,
		16, 17, 18,
		16, 18, 19,
  	];
	let expect_verts = vec![
		130.000000, 165.000000, 65.000000,
		82.000000, 165.000000, 225.000000,
		240.000000, 165.000000, 272.000000,
		290.000000, 165.000000, 114.000000,
		290.000000, 0.000000, 114.000000,
		290.000000, 165.000000, 114.000000,
		240.000000, 165.000000, 272.000000,
		240.000000, 0.000000, 272.000000,
		130.000000, 0.000000, 65.000000,
		130.000000, 165.000000, 65.000000,
		290.000000, 165.000000, 114.000000,
		290.000000, 0.000000, 114.000000,
		82.000000, 0.000000, 225.000000,
		82.000000, 165.000000, 225.000000,
		130.000000, 165.000000, 65.000000,
		130.000000, 0.000000, 65.000000,
		240.000000, 0.000000, 272.000000,
		240.000000, 165.000000, 272.000000,
		82.000000, 165.000000, 225.000000,
		82.000000, 0.000000, 225.000000,
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify the tall block loaded properly
	assert_eq!(models[7].name, "tall_block");
	let mesh = &models[7].mesh;
	assert_eq!(mesh.material_id, Some(0));
	let expect_indices = vec![
		0, 1, 2,
		0, 2, 3,
		4, 5, 6,
		4, 6, 7,
		8, 9, 10,
		8, 10, 11,
		12, 13, 14,
		12, 14, 15,
		16, 17, 18,
		16, 18, 19,
  	];
	let expect_verts = vec![
		423.000000, 330.000000, 247.000000,
		265.000000, 330.000000, 296.000000,
		314.000000, 330.000000, 456.000000,
		472.000000, 330.000000, 406.000000,
		423.000000, 0.000000, 247.000000,
		423.000000, 330.000000, 247.000000,
		472.000000, 330.000000, 406.000000,
		472.000000, 0.000000, 406.000000,
		472.000000, 0.000000, 406.000000,
		472.000000, 330.000000, 406.000000,
		314.000000, 330.000000, 456.000000,
		314.000000, 0.000000, 456.000000,
		314.000000, 0.000000, 456.000000,
		314.000000, 330.000000, 456.000000,
		265.000000, 330.000000, 296.000000,
		265.000000, 0.000000, 296.000000,
		265.000000, 0.000000, 296.000000,
		265.000000, 330.000000, 296.000000,
		423.000000, 330.000000, 247.000000,
		423.000000, 0.000000, 247.000000,
	];
	assert_eq!(mesh.indices, expect_indices);
	assert_eq!(mesh.positions, expect_verts);

	// Verify white material loaded properly
	assert_eq!(mats[0].name, "white");
	let mat = &mats[0];
	assert_eq!(mat.ambient, [0.0, 0.0, 0.0]);
	assert_eq!(mat.diffuse, [1.0, 1.0, 1.0]);
	assert_eq!(mat.specular, [0.0, 0.0, 0.0]);

	// Verify red material loaded properly
	assert_eq!(mats[1].name, "red");
	let mat = &mats[1];
	assert_eq!(mat.ambient, [0.0, 0.0, 0.0]);
	assert_eq!(mat.diffuse, [1.0, 0.0, 0.0]);
	assert_eq!(mat.specular, [0.0, 0.0, 0.0]);

	// Verify blue material loaded properly
	assert_eq!(mats[2].name, "blue");
	let mat = &mats[2];
	assert_eq!(mat.ambient, [0.0, 0.0, 0.0]);
	assert_eq!(mat.diffuse, [0.0, 0.0, 1.0]);
	assert_eq!(mat.specular, [0.0, 0.0, 0.0]);
	assert_eq!(mat.shininess, 10.0);
	assert_eq!(mat.unknown_param.len(), 1);
	assert_eq!(mat.unknown_param.get("crazy_unknown"), Some(&"Wierd stuff here".to_string()));

	// Verify light material loaded properly
	assert_eq!(mats[3].name, "light");
	let mat = &mats[3];
	assert_eq!(mat.ambient, [20.0, 20.0, 20.0]);
	assert_eq!(mat.diffuse, [1.0, 1.0, 1.0]);
	assert_eq!(mat.specular, [0.0, 0.0, 0.0]);
	assert_eq!(mat.dissolve, 0.8);

	// Verify green material loaded properly
	assert_eq!(mats[4].name, "green");
	let mat = &mats[4];
	assert_eq!(mat.ambient, [0.0, 0.0, 0.0]);
	assert_eq!(mat.diffuse, [0.0, 1.0, 0.0]);
	assert_eq!(mat.specular, [0.0, 0.0, 0.0]);
	assert_eq!(mat.ambient_texture, "dummy_texture.png");
	assert_eq!(mat.diffuse_texture, "dummy_texture.png");
	assert_eq!(mat.specular_texture, "dummy_texture.png");
	assert_eq!(mat.normal_texture, "dummy_texture.png");
	assert_eq!(mat.dissolve_texture, "dummy_texture.png");
}