src bone transforms stuff?

src/mdl/mod.rs

@@ -33,7 +33,7 @@ impl Mdl {
         let header = <StudioHeader as Readable>::read(data)?;
         let header2 = header
             .header2_index()
-            .map(|index| read_single(data, index))
+            .map(|index| read_single::<StudioHeader2, _>(data, index))
             .transpose()?;
         let name = header.name.try_into()?;
         let mut textures = read_relative_iter(data, header.texture_indexes())
@@ -52,6 +52,10 @@ impl Mdl {
 
         let skin_table = read_relative::<u16, _>(data, header.skin_reference_indexes())?;
         let bones = read_relative(data, header.bone_indexes())?;
+
+        // are these used?
+        let _source_bone_transforms: Vec<SourceBoneTransform> = read_relative(data, header2.unwrap().source_bone_transforms())?;
+
         let surface_prop = read_single(data, header.surface_prop_index)?;
         let key_values = (header.key_value_size > 0)
             .then(|| read_single(data, header.key_value_index))

src/mdl/raw/bones.rs

@@ -315,3 +315,38 @@ bitflags! {
         const CONTENTS_HITBOX =               0x40000000;
     }
 }
+
+#[derive(Debug, Clone, Copy, Zeroable, Pod)]
+#[repr(C)]
+pub struct SourceBoneTransformHeader {
+    pub sz_name_index: i32,
+
+    pub pre_transform: Transform3x4,
+    pub post_transform: Transform3x4,
+}
+#[derive(Debug, Clone)]
+#[repr(C)]
+pub struct SourceBoneTransform {
+    pub name: String,
+    pub pre_transform: Transform3x4,
+    pub post_transform: Transform3x4,
+}
+
+impl ReadRelative for SourceBoneTransform {
+    type Header = SourceBoneTransformHeader;
+
+    fn read(data: &[u8], header: Self::Header) -> Result<Self, ModelError> {
+        let name_bytes =
+            data.get(header.sz_name_index as usize..)
+                .ok_or(ModelError::OutOfBounds {
+                    data: "source bone transform name",
+                    offset: header.sz_name_index as usize,
+                })?;
+
+        Ok(SourceBoneTransform {
+            name: String::read(name_bytes, ())?,
+            pre_transform: header.pre_transform,
+            post_transform: header.post_transform,
+        })
+    }
+}

src/mdl/raw/header2.rs

@@ -1,6 +1,8 @@
-use crate::ReadableRelative;
+use std::mem::size_of;
+use crate::{index_range, ReadableRelative};
 use bytemuck::{Pod, Zeroable};
 use std::ops::Range;
+use crate::mdl::{BoneHeader, SourceBoneTransformHeader};
 
 #[derive(Debug, Clone, Copy, Zeroable, Pod)]
 #[repr(C)]
@@ -26,9 +28,8 @@ pub struct StudioHeader2 {
 impl ReadableRelative for StudioHeader2 {}
 
 impl StudioHeader2 {
-    pub fn source_bone_transforms(&self) -> Range<i32> {
-        self.source_bone_transform_index
-            ..(self.source_bone_transform_index + self.source_bone_transform_count)
+    pub fn source_bone_transforms(&self) -> impl Iterator<Item = usize> {
+        index_range(self.source_bone_transform_index, self.source_bone_transform_count, size_of::<SourceBoneTransformHeader>())
     }
 
     pub fn bone_flex_drivers(&self) -> Range<i32> {