Vendor dependencies for 0.3.0 release

vendor/gltf/src/skin/iter.rs

@@ -0,0 +1,40 @@
+use std::slice;
+
+use crate::{Document, Node};
+
+/// An `Iterator` that visits the joints of a `Skin`.
+#[derive(Clone, Debug)]
+pub struct Joints<'a> {
+    /// The parent `Document` struct.
+    pub(crate) document: &'a Document,
+
+    /// The internal node index iterator.
+    pub(crate) iter: slice::Iter<'a, json::Index<json::scene::Node>>,
+}
+
+impl<'a> ExactSizeIterator for Joints<'a> {}
+impl<'a> Iterator for Joints<'a> {
+    type Item = Node<'a>;
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter
+            .next()
+            .map(|index| self.document.nodes().nth(index.value()).unwrap())
+    }
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        self.iter.size_hint()
+    }
+    fn count(self) -> usize {
+        self.iter.count()
+    }
+    fn last(self) -> Option<Self::Item> {
+        let document = self.document;
+        self.iter
+            .last()
+            .map(|index| document.nodes().nth(index.value()).unwrap())
+    }
+    fn nth(&mut self, n: usize) -> Option<Self::Item> {
+        self.iter
+            .nth(n)
+            .map(|index| self.document.nodes().nth(index.value()).unwrap())
+    }
+}

vendor/gltf/src/skin/mod.rs

@@ -0,0 +1,118 @@
+#[cfg(feature = "extensions")]
+use serde_json::{Map, Value};
+
+use crate::{Accessor, Document, Node};
+
+#[cfg(feature = "utils")]
+use crate::Buffer;
+
+/// Iterators.
+pub mod iter;
+
+/// Utility functions.
+#[cfg(feature = "utils")]
+#[cfg_attr(docsrs, doc(cfg(feature = "utils")))]
+pub mod util;
+
+#[cfg(feature = "utils")]
+#[doc(inline)]
+pub use self::util::Reader;
+
+/// Joints and matrices defining a skin.
+#[derive(Clone, Debug)]
+pub struct Skin<'a> {
+    /// The parent `Document` struct.
+    document: &'a Document,
+
+    /// The corresponding JSON index.
+    index: usize,
+
+    /// The corresponding JSON struct.
+    json: &'a json::skin::Skin,
+}
+
+impl<'a> Skin<'a> {
+    /// Constructs a `Skin`.
+    pub(crate) fn new(document: &'a Document, index: usize, json: &'a json::skin::Skin) -> Self {
+        Self {
+            document,
+            index,
+            json,
+        }
+    }
+
+    /// Returns the internal JSON index.
+    pub fn index(&self) -> usize {
+        self.index
+    }
+
+    /// Returns extension data unknown to this crate version.
+    #[cfg(feature = "extensions")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "extensions")))]
+    pub fn extensions(&self) -> Option<&Map<String, Value>> {
+        let ext = self.json.extensions.as_ref()?;
+        Some(&ext.others)
+    }
+
+    /// Queries extension data unknown to this crate version.
+    #[cfg(feature = "extensions")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "extensions")))]
+    pub fn extension_value(&self, ext_name: &str) -> Option<&Value> {
+        let ext = self.json.extensions.as_ref()?;
+        ext.others.get(ext_name)
+    }
+
+    /// Optional application specific data.
+    pub fn extras(&self) -> &'a json::Extras {
+        &self.json.extras
+    }
+
+    /// Returns the accessor containing the 4x4 inverse-bind matrices.
+    ///
+    /// When `None`, each matrix is assumed to be the 4x4 identity matrix which
+    /// implies that the inverse-bind matrices were pre-applied.
+    pub fn inverse_bind_matrices(&self) -> Option<Accessor<'a>> {
+        self.json
+            .inverse_bind_matrices
+            .as_ref()
+            .map(|index| self.document.accessors().nth(index.value()).unwrap())
+    }
+
+    /// Constructs a skin reader.
+    #[cfg(feature = "utils")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "utils")))]
+    pub fn reader<'s, F>(&'a self, get_buffer_data: F) -> Reader<'a, 's, F>
+    where
+        F: Clone + Fn(Buffer<'a>) -> Option<&'s [u8]>,
+    {
+        Reader {
+            skin: self.clone(),
+            get_buffer_data,
+        }
+    }
+
+    /// Returns an `Iterator` that visits the skeleton nodes used as joints in
+    /// this skin.
+    pub fn joints(&self) -> iter::Joints<'a> {
+        iter::Joints {
+            document: self.document,
+            iter: self.json.joints.iter(),
+        }
+    }
+
+    /// Optional user-defined name for this object.
+    #[cfg(feature = "names")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "names")))]
+    pub fn name(&self) -> Option<&'a str> {
+        self.json.name.as_deref()
+    }
+
+    /// Returns the node used as the skeleton root. When `None`, joints
+    /// transforms resolve to scene root.
+    pub fn skeleton(&self) -> Option<Node<'a>> {
+        self.json
+            .skeleton
+            .as_ref()
+            .map(|index| self.document.nodes().nth(index.value()).unwrap())
+    }
+}

vendor/gltf/src/skin/util.rs

@@ -0,0 +1,29 @@
+use crate::accessor;
+
+use crate::{Buffer, Skin};
+
+/// Inverse Bind Matrices of type `[[f32; 4]; 4]`.
+pub type ReadInverseBindMatrices<'a> = accessor::Iter<'a, [[f32; 4]; 4]>;
+
+/// Skin reader.
+#[derive(Clone, Debug)]
+pub struct Reader<'a, 's, F>
+where
+    F: Clone + Fn(Buffer<'a>) -> Option<&'s [u8]>,
+{
+    pub(crate) skin: Skin<'a>,
+    pub(crate) get_buffer_data: F,
+}
+
+impl<'a, 's, F> Reader<'a, 's, F>
+where
+    F: Clone + Fn(Buffer<'a>) -> Option<&'s [u8]>,
+{
+    /// Returns an `Iterator` that reads the inverse bind matrices of
+    /// the skin.
+    pub fn read_inverse_bind_matrices(&self) -> Option<ReadInverseBindMatrices<'s>> {
+        self.skin
+            .inverse_bind_matrices()
+            .and_then(|accessor| accessor::Iter::new(accessor, self.get_buffer_data.clone()))
+    }
+}