Properly set bone parenting Skeleton::from_skel, export bone transforms

Cargo.lock

@@ -248,6 +248,12 @@ version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f107b87b6afc2a64fd13cac55fe06d6c8859f12d4b14cbcdd2c67d0976781be"
 
+[[package]]
+name = "glam"
+version = "0.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "518faa5064866338b013ff9b2350dc318e14cc4fcd6cb8206d7e7c9886c98815"
+
 [[package]]
 name = "half"
 version = "1.8.2"
@@ -437,6 +443,7 @@ dependencies = [
  "bitfield-struct",
  "crc",
  "criterion",
+ "glam",
  "half",
  "hard-xml",
  "libz-sys",

Cargo.toml

@@ -47,3 +47,6 @@ serde = { version = "1.0", features = ["derive"] }
 
 # needed for file info (fiin)
 sha1_smol = "1.0.0"
+
+# needed for deconstructing skeleton pose matrices
+glam = "0.21.3"

src/skeleton.rs

@@ -1,19 +1,20 @@
 use crate::gamedata::MemoryBuffer;
 use hard_xml::XmlRead;
+use glam::Mat4;
 
 #[derive(Debug)]
 pub struct Bone {
-    name: String,
-    parent_index: usize,
+    pub name: String,
+    pub parent_index: i32,
 
-    position: [f32; 3],
-    rotation: [f32; 4],
-    scale: [f32; 3]
+    pub position: [f32; 3],
+    pub rotation: [f32; 4],
+    pub scale: [f32; 3]
 }
 
 #[derive(Debug)]
 pub struct Skeleton {
-    bones : Vec<Bone>
+    pub bones : Vec<Bone>
 }
 
 impl Skeleton {
@@ -116,24 +117,19 @@ impl Skeleton {
         };
 
         for bone in &json_bones {
+            let pose_matrix = Mat4::from_cols_array(&bone.pose_matrix);
+
+            let (scale, rotation, translation) = pose_matrix.to_scale_rotation_translation();
+
             skeleton.bones.push(Bone {
                 name: bone.bone_name.clone(),
-                parent_index: 0,
-                position: [0.0; 3],
-                rotation: [0.0; 4],
-                scale: [0.0; 3]
+                parent_index: bone.bone_parent,
+                position: translation.to_array(),
+                rotation: rotation.to_array(),
+                scale: scale.to_array()
             });
         }
 
-        // assign parenting
-        for bone in &json_bones {
-            if bone.bone_parent != -1 {
-                let mut new_bone = &mut skeleton.bones[bone.bone_number as usize];
-
-                new_bone.parent_index = bone.bone_parent as usize;
-            }
-        }
-
         Some(skeleton)
     }
 }