default sun option

2 files changed, 33 insertions, 7 deletions

diff --git a/doc/resources.md b/doc/resources.md
index 7ef22be..a382858 100644
--- a/doc/resources.md
+++ b/doc/resources.md
@@ -147,6 +147,8 @@ inherited. Attribute values are zipped similar to vertex attributes.
 
 - **Skybox**: Equirectangular projection is used. TODO: Unit for Luminous
   intensity? lm/sr?
+- **Sun**: Direction is a normal vector, color is illuminance of each channel in
+  lux.
 
 ## Texture
 
diff --git a/world/src/main.rs b/world/src/main.rs
index 00a5913..08a89cc 100644
--- a/world/src/main.rs
+++ b/world/src/main.rs
@@ -86,6 +86,9 @@ pub struct Args {
     #[arg(long)]
     use_cache: bool,
 
+    #[arg(short = 'S', long)]
+    with_default_sun: bool,
+
     /// Spins the object
     #[arg(long)]
     debug_spin: bool,
@@ -124,6 +127,11 @@ fn main() -> Result<()> {
 
         let root = gltf.default_scene().ok_or(anyhow!("no default scene"))?;
 
+        eprintln!("{:?}", gltf.extensions_used());
+        eprintln!("{:?}", gltf.extensions());
+        eprintln!("{:?}", root.extensions());
+        eprintln!("{:?}", root.extras());
+
         let mut nodes = Vec::new();
         fn traverse<'a>(out: &mut Vec<(Affine3A, Node<'a>)>, node: Node<'a>, trans: Affine3A) {
             let trans = trans * transform_to_affine(node.transform());
@@ -216,7 +224,11 @@ fn main() -> Result<()> {
             .par_iter()
             .map(|(trans, node)| {
                 let mut prefab = Prefab::default();
-
+                if node.name().unwrap_or_default() == "particles" {
+                    eprintln!("{:?}", node.transform());
+                    eprintln!("{:?}", node.extensions());
+                    eprintln!("{:?}", node.extras());
+                }
                 if !node.name().unwrap_or_default().ends_with("-collider") {
                     if let Some(mesh) = node.mesh() {
                         import_mesh(
@@ -279,14 +291,26 @@ fn main() -> Result<()> {
             vec![]
         };
 
-        if let Some(skybox) = &args.skybox {
+        let skybox = if let Some(skybox) = &args.skybox {
             let mut buf = Vec::new();
             File::open(skybox)?.read_to_end(&mut buf)?;
-            prefab.environment = Some(store.set(&EnvironmentPart {
-                skybox: Some(store.set(&Image(Cow::Owned(buf)))?),
-                ..Default::default()
-            })?);
-        }
+            Some(store.set(&Image(Cow::Owned(buf)))?)
+        } else {
+            None
+        };
+        let sun = if args.with_default_sun {
+            Some((
+                vec3a(1., -5., 1.).normalize(),
+                vec3a(100_000., 100_000., 100_000.),
+            ))
+        } else {
+            None
+        };
+        prefab.environment = if skybox.is_some() || sun.is_some() {
+            Some(store.set(&EnvironmentPart { skybox, sun })?)
+        } else {
+            None
+        };
 
         prefab.name = args.name.clone().or(gltf
             .default_scene()