hitboxes

src/mdl/mod.rs

@@ -7,7 +7,7 @@ use std::mem::size_of;
 use bytemuck::{Pod, Zeroable};
 
 use crate::vvd::Vertex;
-use crate::{read_relative, read_relative_iter, read_single, FixedString, ModelError, ReadRelative, Readable, Transform3x4};
+use crate::{read_relative, read_relative_iter, read_single, FixedString, ModelError, ReadRelative, Readable, Transform3x4, Vector};
 
 type Result<T> = std::result::Result<T, ModelError>;
 
@@ -26,6 +26,7 @@ pub struct Mdl {
     pub local_animations: Vec<AnimationDescription>,
     pub pose_parameters: Vec<PoseParameterDescription>,
     pub attachments: Vec<StudioAttachment>,
+    pub hit_boxes: Vec<HitBoxSet>,
 }
 
 impl Mdl {
@@ -63,6 +64,7 @@ impl Mdl {
         let local_animations = read_relative(data, header.local_animation_indexes())?;
         let pose_parameters = read_relative(data, header.local_pose_param_indexes())?;
         let attachments = read_relative(data, header.attachment_indexes())?;
+        let hit_boxes = read_relative(data, header.hitbox_set_indexes())?;
 
         Ok(Mdl {
             name,
@@ -88,6 +90,7 @@ impl Mdl {
             pose_parameters,
             local_animations,
             attachments,
+            hit_boxes,
         })
     }
 }
@@ -189,3 +192,43 @@ impl ReadRelative for StudioAttachment {
         })
     }
 }
+
+#[derive(Debug, Clone)]
+pub struct HitBoxSet {
+    pub name: String,
+    pub boxes: Vec<BoundingBox>
+}
+
+impl ReadRelative for HitBoxSet {
+    type Header = HitBoxSetHeader;
+
+    fn read(data: &[u8], header: Self::Header) -> Result<Self> {
+        Ok(HitBoxSet {
+            name: String::read(&data[header.name_index as usize..], ())?.replace('\\', "/"),
+            boxes: read_relative(data, header.hitbox_indexes())?
+        })
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct BoundingBox {
+    pub name: String,
+    pub bone: i32,
+    pub group: i32,
+    pub min: Vector,
+    pub max: Vector
+}
+
+impl ReadRelative for BoundingBox {
+    type Header = BoundingBoxHeader;
+
+    fn read(data: &[u8], header: Self::Header) -> Result<Self> {
+        Ok(BoundingBox {
+            name: String::read(&data[header.name_index as usize..], ())?.replace('\\', "/"),
+            bone: header.bone,
+            group: header.group,
+            min: header.bounding_box_min,
+            max: header.bounding_box_max,
+        })
+    }
+}

src/mdl/raw/header.rs

@@ -31,8 +31,8 @@ pub struct StudioHeader {
     bone_controller_offset: i32,
 
     // mstudiohitboxset_t
-    hitbox_count: i32,
-    hitbox_offset: i32,
+    hitbox_set_count: i32,
+    hitbox_set_offset: i32,
 
     // mstudioanimdesc_t
     local_animation_count: i32,
@@ -216,8 +216,8 @@ impl StudioHeader {
         index_range(self.bone_controller_offset, self.bone_controller_count, 1)
     }
 
-    pub fn hitbox_indexes(&self) -> impl Iterator<Item = usize> {
-        index_range(self.hitbox_offset, self.hitbox_count, 1)
+    pub fn hitbox_set_indexes(&self) -> impl Iterator<Item = usize> {
+        index_range(self.hitbox_set_offset, self.hitbox_set_count, size_of::<HitBoxSetHeader>())
     }
 
     pub fn local_animation_indexes(&self) -> impl Iterator<Item = usize> {

src/mdl/raw/mod.rs

@@ -133,3 +133,30 @@ bitflags! {
 }
 
 static_assertions::const_assert_eq!(size_of::<StudioAttachmentHeader>(), 23 * 4);
+
+#[derive(Debug, Clone, Copy, Zeroable, Pod)]
+#[repr(C)]
+#[allow(dead_code)]
+pub struct HitBoxSetHeader {
+    pub name_index: i32,
+    pub hitbox_count: i32,
+    pub hitbox_offset: i32,
+}
+
+impl HitBoxSetHeader {
+    pub fn hitbox_indexes(&self) -> impl Iterator<Item = usize> {
+        index_range(self.hitbox_offset, self.hitbox_count, size_of::<BoundingBoxHeader>())
+    }
+}
+
+#[derive(Debug, Clone, Copy, Zeroable, Pod)]
+#[repr(C)]
+#[allow(dead_code)]
+pub struct BoundingBoxHeader {
+    pub bone: i32,
+    pub group: i32,
+    pub bounding_box_min: Vector,
+    pub bounding_box_max: Vector,
+    pub name_index: i32,
+    padding: [i32; 8],
+}