Implement COLLADA parser

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install Rust
         run: rustup update stable
       - name: Install cargo-hack

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
     if: github.repository_owner == 'openrr'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install Rust
         run: rustup update stable
       - run: cargo package

Cargo.toml

@@ -1,10 +1,10 @@
 [package]
 name = "mesh-loader"
-version = "0.1.0"
+version = "0.0.1"
 edition = "2021"
 license = "Apache-2.0"
 repository = "https://github.com/openrr/mesh-loader"
-keywords = ["asset", "mesh", "stl"] # TODO: "collada", "obj"
+keywords = ["asset", "mesh", "stl", "collada"] # TODO: "obj"
 categories = ["parser-implementations", "graphics"]
 exclude = ["/.*", "/assets"]
 description = """
@@ -16,15 +16,14 @@ resolver = "2"
 members = ["example"]
 
 [features]
-default = ["stl"]
+default = ["stl", "collada"]
 
 # STL (.stl)
 # https://en.wikipedia.org/wiki/STL_(file_format)
 stl = ["rustc-hash"]
-# TODO
-# # COLLADA (.dae)
-# # https://en.wikipedia.org/wiki/COLLADA
-# collada = []
+# COLLADA (.dae)
+# https://en.wikipedia.org/wiki/COLLADA
+collada = ["indexmap", "roxmltree"]
 # TODO
 # # Wavefront OBJ (.obj)
 # # https://en.wikipedia.org/wiki/Wavefront_.obj_file
@@ -38,4 +37,8 @@ memchr = "2.4"
 # Used in STL parsing.
 rustc-hash = { version = "1", optional = true }
 
+# Used in COLLADA parsing.
+indexmap = { version = "1.5.2", optional = true, features = ["std"] }
+roxmltree = { version = "0.14", optional = true }
+
 [dev-dependencies]

example/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "examples"
+name = "example"
 version = "0.0.0"
 edition = "2021"
 publish = false
@@ -9,6 +9,6 @@ mesh-loader = { path = ".." }
 
 anyhow = "1"
 clap = { version = "3", features = ["derive"] }
-kiss3d = "0.33"
+kiss3d = "0.34"
 tracing = { version = "0.1", default-features = false, features = ["std"] }
 tracing-subscriber = { version = "0.3", default-features = false, features = ["ansi", "env-filter"] }

example/examples/kiss3d.rs

@@ -48,7 +48,7 @@ fn main() -> Result<()> {
 
     let mut base = match path.extension().and_then(OsStr::to_str) {
         Some("stl" | "STL") => add_stl(&mut window, path, scale)?,
-        // Some("dae" | "DAE") => add_collada(&mut window, path, scale)?,
+        Some("dae" | "DAE") => add_collada(&mut window, path, scale)?,
         // Some("obj" | "OBJ") => add_obj(&mut window, path, scale)?,
         _ => bail!("unsupported file type {path:?}"),
     };
@@ -97,3 +97,57 @@ fn add_stl(
     let mesh = Rc::new(RefCell::new(mesh));
     Ok(window.add_mesh(mesh, scale))
 }
+
+fn add_collada(
+    window: &mut Window,
+    path: impl AsRef<Path>,
+    scale: na::Vector3<f32>,
+) -> Result<SceneNode> {
+    let path = path.as_ref();
+    let mut base = window.add_group();
+    let collada = mesh_loader::collada::from_str(&fs::read_to_string(path)?)?;
+    for mesh in collada.meshes {
+        debug!(
+            "name={},vertices={},normals={},texcoords0={},texcoords1={},faces={}",
+            mesh.name,
+            mesh.vertices.len(),
+            mesh.normals.len(),
+            mesh.texcoords[0].len(),
+            mesh.texcoords[1].len(),
+            mesh.faces.len()
+        );
+        let positions = mesh.vertices.iter().map(|&v| na::Point3::from(v)).collect();
+        let normals = if mesh.normals.is_empty() {
+            None
+        } else {
+            Some(mesh.normals.iter().map(|&v| na::Vector3::from(v)).collect())
+        };
+        let texcoords = if mesh.texcoords[0].is_empty() {
+            None
+        } else {
+            Some(
+                mesh.texcoords[0]
+                    .iter()
+                    .map(|&v| na::Point2::from(v))
+                    .collect(),
+            )
+        };
+        let faces = mesh
+            .faces
+            .iter()
+            .map(|v| na::Point3::new(v[0] as u16, v[1] as u16, v[2] as u16))
+            .collect();
+        let mut _scene = base.add_mesh(
+            Rc::new(RefCell::new(kiss3d::resource::Mesh::new(
+                positions, faces, normals, texcoords, false,
+            ))),
+            scale,
+        );
+
+        // TODO(material)
+        // if let Some(path) = materials.get(0) {
+        //     scene.set_texture_from_file(path, path.to_str().unwrap());
+        // }
+    }
+    Ok(base)
+}