converting a very simple two-mesh GLB to IQM

main
_ 2022-02-21 00:44:03 +00:00
parent d250cf12fa
commit ce29ce6ad1
3 changed files with 383 additions and 51 deletions

277
Cargo.lock generated
View File

@ -2,15 +2,292 @@
# It is not intended for manual editing. # It is not intended for manual editing.
version = 3 version = 3
[[package]]
name = "adler32"
version = "1.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
[[package]]
name = "autocfg"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
[[package]]
name = "base64"
version = "0.12.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3441f0f7b02788e948e47f457ca01f1d7e6d92c693bc132c22b087d3141c03ff"
[[package]]
name = "bitflags"
version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
[[package]]
name = "bytemuck"
version = "1.7.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "439989e6b8c38d1b6570a384ef1e49c8848128f5a97f3914baef02920842712f"
[[package]] [[package]]
name = "byteorder" name = "byteorder"
version = "1.4.3" version = "1.4.3"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610" checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
[[package]]
name = "cfg-if"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "color_quant"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
[[package]]
name = "crc32fast"
version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
dependencies = [
"cfg-if",
]
[[package]]
name = "deflate"
version = "0.8.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "73770f8e1fe7d64df17ca66ad28994a0a623ea497fa69486e14984e715c5d174"
dependencies = [
"adler32",
"byteorder",
]
[[package]]
name = "glam"
version = "0.20.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e4fa84eead97d5412b2a20aed4d66612a97a9e41e08eababdb9ae2bf88667490"
[[package]]
name = "gltf"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "00e0a0eace786193fc83644907097285396360e9e82e30f81a21e9b1ba836a3e"
dependencies = [
"base64",
"byteorder",
"gltf-json",
"image",
"lazy_static",
]
[[package]]
name = "gltf-derive"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bdd53d6e284bb2bf02a6926e4cc4984978c1990914d6cd9deae4e31cf37cd113"
dependencies = [
"inflections",
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "gltf-json"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9949836a9ec5e7f83f76fb9bbcbc77f254a577ebbdb0820867bc11979ef97cad"
dependencies = [
"gltf-derive",
"serde",
"serde_derive",
"serde_json",
]
[[package]]
name = "image"
version = "0.23.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "24ffcb7e7244a9bf19d35bf2883b9c080c4ced3c07a9895572178cdb8f13f6a1"
dependencies = [
"bytemuck",
"byteorder",
"color_quant",
"jpeg-decoder",
"num-iter",
"num-rational",
"num-traits",
"png",
]
[[package]]
name = "inflections"
version = "1.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a257582fdcde896fd96463bf2d40eefea0580021c0712a0e2b028b60b47a837a"
[[package]]
name = "itoa"
version = "1.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
[[package]]
name = "jpeg-decoder"
version = "0.1.22"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "229d53d58899083193af11e15917b5640cd40b29ff475a1fe4ef725deb02d0f2"
[[package]]
name = "lazy_static"
version = "1.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
[[package]]
name = "miniz_oxide"
version = "0.3.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "791daaae1ed6889560f8c4359194f56648355540573244a5448a83ba1ecc7435"
dependencies = [
"adler32",
]
[[package]] [[package]]
name = "model_converter" name = "model_converter"
version = "0.1.0" version = "0.1.0"
dependencies = [ dependencies = [
"byteorder", "byteorder",
"glam",
"gltf",
] ]
[[package]]
name = "num-integer"
version = "0.1.44"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
dependencies = [
"autocfg",
"num-traits",
]
[[package]]
name = "num-iter"
version = "0.1.42"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b2021c8337a54d21aca0d59a92577a029af9431cb59b909b03252b9c164fad59"
dependencies = [
"autocfg",
"num-integer",
"num-traits",
]
[[package]]
name = "num-rational"
version = "0.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "12ac428b1cb17fce6f731001d307d351ec70a6d202fc2e60f7d4c5e42d8f4f07"
dependencies = [
"autocfg",
"num-integer",
"num-traits",
]
[[package]]
name = "num-traits"
version = "0.2.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
dependencies = [
"autocfg",
]
[[package]]
name = "png"
version = "0.16.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3c3287920cb847dee3de33d301c463fba14dda99db24214ddf93f83d3021f4c6"
dependencies = [
"bitflags",
"crc32fast",
"deflate",
"miniz_oxide",
]
[[package]]
name = "proc-macro2"
version = "1.0.36"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c7342d5883fbccae1cc37a2353b09c87c9b0f3afd73f5fb9bba687a1f733b029"
dependencies = [
"unicode-xid",
]
[[package]]
name = "quote"
version = "1.0.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "864d3e96a899863136fc6e99f3d7cae289dafe43bf2c5ac19b70df7210c0a145"
dependencies = [
"proc-macro2",
]
[[package]]
name = "ryu"
version = "1.0.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "73b4b750c782965c211b42f022f59af1fbceabdd026623714f104152f1ec149f"
[[package]]
name = "serde"
version = "1.0.136"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ce31e24b01e1e524df96f1c2fdd054405f8d7376249a5110886fb4b658484789"
[[package]]
name = "serde_derive"
version = "1.0.136"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "08597e7152fcd306f41838ed3e37be9eaeed2b61c42e2117266a554fab4662f9"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "serde_json"
version = "1.0.79"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8e8d9fa5c3b304765ce1fd9c4c8a3de2c8db365a5b91be52f186efc675681d95"
dependencies = [
"itoa",
"ryu",
"serde",
]
[[package]]
name = "syn"
version = "1.0.86"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
dependencies = [
"proc-macro2",
"quote",
"unicode-xid",
]
[[package]]
name = "unicode-xid"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"

View File

@ -7,3 +7,5 @@ edition = "2021"
[dependencies] [dependencies]
byteorder = "1.4.3" byteorder = "1.4.3"
glam = "0.20.2"
gltf = "1.0.0"

View File

@ -3,59 +3,111 @@ use std::{
io::Write, io::Write,
}; };
use glam::{
Mat4,
Vec3,
};
fn main () { fn main () {
let vertexes = [ let (document, buffers, _images) = gltf::import ("input.glb").unwrap ();
[-1.0, -1.0, -1.0], let buffer = buffers.get (0).unwrap ();
[ 1.0, -1.0, -1.0],
[ 1.0, 1.0, -1.0],
[-1.0, 1.0, -1.0],
[-1.0, -1.0, 1.0], let mut vertexes = Vec::default ();
[ 1.0, -1.0, 1.0], let mut triangles = Vec::default ();
[ 1.0, 1.0, 1.0], let mut meshes = Vec::default ();
[-1.0, 1.0, 1.0], let mut texts = String::default ();
];
let triangles = [ for node in document.nodes () {
[0, 2, 1], let mesh = match node.mesh () {
[0, 3, 2], None => continue,
Some (x) => x,
};
[0, 5, 1], let m = gltf_node_get_mat4 (&node);
[1, 6, 2],
[2, 7, 3],
[3, 4, 0],
[0, 4, 5], for prim in mesh.primitives () {
[1, 5, 6], assert_eq! (prim.mode (), gltf::mesh::Mode::Triangles);
[2, 6, 7],
[3, 7, 4],
[4, 6, 5], let indices = prim.indices ().unwrap ();
[4, 7, 6], let indices_view = indices.view ().unwrap ();
]; let indices_offset = indices.offset () + indices_view.offset ();
let indices_slice = &buffer [indices_offset..(indices_offset + indices.count () * 2)];
let num_vertexes = u32::try_from (vertexes.len ()).unwrap (); let pos = prim.get (&gltf::Semantic::Positions).unwrap ();
let num_triangles = u32::try_from (triangles.len ()).unwrap (); let pos_view = pos.view ().unwrap ();
let pos_offset = pos.offset () + pos_view.offset ();
let pos_slice = &buffer [pos_offset..(pos_offset + pos.count () * 4 * 3)];
let mut texts = Vec::default (); let first_vertex = vertexes.len ();
let mesh = iqm::Mesh { let mesh = iqm::Mesh {
name: u32::try_from (texts.len ()).unwrap (), name: u32::try_from (texts.len ()).unwrap (),
material: 0, material: 0,
first_vertex: 0, first_vertex: u32::try_from (first_vertex).unwrap (),
num_vertexes, num_vertexes: u32::try_from (indices_slice.len () / 2).unwrap (),
first_triangle: 0, // num_vertexes: u32::try_from (3).unwrap (),
num_triangles, first_triangle: u32::try_from (triangles.len ()).unwrap (),
num_triangles: u32::try_from (indices_slice.len () / 6).unwrap (),
//num_triangles: u32::try_from (1).unwrap (),
}; };
texts.push ("Cube"); texts.push_str ("\0");
let meshes = vec! [ meshes.push (mesh);
mesh,
for chunk in indices_slice.chunks_exact (2 * 3) {
let read_idx = |i: usize| u16::from_le_bytes ([chunk [i * 2 + 0], chunk [i * 2 + 1]]);
let idxs = [
read_idx (0),
read_idx (1),
read_idx (2),
]; ];
let num_text: usize = texts.iter () let read_pos_coord = |i| f32::from_le_bytes ([
.map (|s| s.len () + 1) pos_slice [i * 4 + 0],
.sum (); pos_slice [i * 4 + 1],
pos_slice [i * 4 + 2],
pos_slice [i * 4 + 3],
]);
let read_pos = move |i| {
let i = usize::try_from (i).unwrap ();
m.transform_point3 (Vec3::new (
read_pos_coord (i * 3 + 0),
read_pos_coord (i * 3 + 1),
read_pos_coord (i * 3 + 2),
))
};
let verts = [
read_pos (idxs [0]),
read_pos (idxs [2]),
read_pos (idxs [1]),
];
let tri_start = u32::try_from (vertexes.len ()).unwrap ();
triangles.push ([
tri_start + 0,
tri_start + 1,
tri_start + 2,
]);
for v in verts {
vertexes.push (v.to_array ());
}
}
}
}
let vertexes = vertexes;
let triangles = triangles;
let meshes = meshes;
let texts = texts;
let num_vertexes = u32::try_from (vertexes.len ()).unwrap ();
let num_triangles = u32::try_from (triangles.len ()).unwrap ();
let num_text = texts.len ();
let num_text = u32::try_from (num_text).unwrap (); let num_text = u32::try_from (num_text).unwrap ();
let num_meshes = u32::try_from (meshes.len ()).unwrap (); let num_meshes = u32::try_from (meshes.len ()).unwrap ();
@ -69,7 +121,7 @@ fn main () {
let filesize = ofs_text + num_text; let filesize = ofs_text + num_text;
let mut f = File::create ("cube.iqm").unwrap (); let mut f = File::create ("output.iqm").unwrap ();
f.write_all (b"INTERQUAKEMODEL\0").unwrap (); f.write_all (b"INTERQUAKEMODEL\0").unwrap ();
@ -151,7 +203,7 @@ fn main () {
f.write_all (&(3u32.to_le_bytes ())).unwrap (); f.write_all (&(3u32.to_le_bytes ())).unwrap ();
// offset // offset
f.write_all (&(0xA8u32.to_le_bytes ())).unwrap (); f.write_all (&((ofs_vertexarrays + 5 * 4 * 1).to_le_bytes ())).unwrap ();
// Vertexes // Vertexes
@ -170,10 +222,11 @@ fn main () {
} }
// Text // Text
for s in texts { f.write_all (texts.as_bytes ()).unwrap ();
f.write_all (s.as_bytes ()).unwrap ();
f.write_all (b"\0").unwrap ();
} }
fn gltf_node_get_mat4 (node: &gltf::Node) -> Mat4 {
Mat4::from_cols_array_2d (&node.transform ().matrix ())
} }
/// IQM structures as written to disk /// IQM structures as written to disk