set first person hint based on head bones in joint_index

1 files changed, 13 insertions, 1 deletions

diff --git a/world/src/mesh.rs b/world/src/mesh.rs
index 78ec919..4067fb8 100644
--- a/world/src/mesh.rs
+++ b/world/src/mesh.rs
@@ -38,6 +38,7 @@ pub fn import_mesh(
     texture_cache: &TextureCache,
     joint_index_map: &BTreeMap<(usize, u16), u32>,
     vrm: &VrmInfo,
+    head_bones: &[u32],
 ) -> Result<()> {
     for p in mesh.primitives() {
         let name = mesh.name().or(node.name()).map(|e| e.to_owned());
@@ -80,6 +81,7 @@ pub fn import_mesh(
             })
             .transpose()?;
 
+        let mut many_head_bones = false;
         let va_joint_index = reader
             .read_joints(0)
             .map(|iter| {
@@ -88,7 +90,17 @@ pub fn import_mesh(
                     .into_u16()
                     .map(|x| x.map(|x| joint_index_map[&(si, x)]))
                     .collect::<Vec<_>>();
+
+                let head_bone_count = a
+                    .iter()
+                    .flatten()
+                    .filter(|b| head_bones.contains(*b))
+                    .count();
+                many_head_bones |= head_bone_count > a.len() / 2;
                 debug!("{} vertex joint indecies", a.len());
+                if many_head_bones {
+                    debug!("many joints are head bones");
+                }
                 if a.len() != num_vertex {
                     warn!("joint index count does not vertex count")
                 }
@@ -341,7 +353,7 @@ pub fn import_mesh(
         let g_double_sided = bool_to_opt(p.material().double_sided(), "double sided");
 
         let hint_hide_first_person = bool_to_opt(
-            vrm.hide_first_person.contains(&node.index()),
+            many_head_bones | vrm.hide_first_person.contains(&node.index()),
             "hide first person hint",
         );