Split rigid-bodies and colliders into multiple components

1 files changed, 220 insertions, 0 deletions

diff --git a/src/geometry/collider_components.rs b/src/geometry/collider_components.rs
new file mode 100644
index 0000000..1aa760a
--- /dev/null
+++ b/src/geometry/collider_components.rs
@@ -0,0 +1,220 @@
+use crate::dynamics::{CoefficientCombineRule, MassProperties, RigidBodyHandle};
+use crate::geometry::{InteractionGroups, SAPProxyIndex, Shape, SharedShape, SolverFlags};
+use crate::math::{Isometry, Real};
+use crate::parry::partitioning::IndexedData;
+use std::ops::Deref;
+
+/// The unique identifier of a collider added to a collider set.
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+#[repr(transparent)]
+pub struct ColliderHandle(pub crate::data::arena::Index);
+
+impl ColliderHandle {
+    /// Converts this handle into its (index, generation) components.
+    pub fn into_raw_parts(self) -> (u32, u32) {
+        self.0.into_raw_parts()
+    }
+
+    /// Reconstructs an handle from its (index, generation) components.
+    pub fn from_raw_parts(id: u32, generation: u32) -> Self {
+        Self(crate::data::arena::Index::from_raw_parts(id, generation))
+    }
+
+    /// An always-invalid collider handle.
+    pub fn invalid() -> Self {
+        Self(crate::data::arena::Index::from_raw_parts(
+            crate::INVALID_U32,
+            crate::INVALID_U32,
+        ))
+    }
+}
+
+impl IndexedData for ColliderHandle {
+    fn default() -> Self {
+        Self(IndexedData::default())
+    }
+
+    fn index(&self) -> usize {
+        self.0.index()
+    }
+}
+
+bitflags::bitflags! {
+    #[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+    /// Flags describing how the collider has been modified by the user.
+    pub struct ColliderChanges: u32 {
+        const MODIFIED             = 1 << 0;
+        const PARENT               = 1 << 1; // => BF & NF updates.
+        const POSITION             = 1 << 2; // => BF & NF updates.
+        const GROUPS               = 1 << 3; // => NF update.
+        const SHAPE                = 1 << 4; // => BF & NF update. NF pair workspace invalidation.
+        const TYPE                 = 1 << 5; // => NF update. NF pair invalidation.
+    }
+}
+
+impl Default for ColliderChanges {
+    fn default() -> Self {
+        ColliderChanges::empty()
+    }
+}
+
+impl ColliderChanges {
+    pub fn needs_broad_phase_update(self) -> bool {
+        self.intersects(
+            ColliderChanges::PARENT | ColliderChanges::POSITION | ColliderChanges::SHAPE,
+        )
+    }
+
+    pub fn needs_narrow_phase_update(self) -> bool {
+        self.bits() > 1
+    }
+}
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+pub enum ColliderType {
+    Solid,
+    Sensor,
+}
+
+impl ColliderType {
+    pub fn is_sensor(self) -> bool {
+        self == ColliderType::Sensor
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+pub struct ColliderBroadPhaseData {
+    pub(crate) proxy_index: SAPProxyIndex,
+}
+
+impl Default for ColliderBroadPhaseData {
+    fn default() -> Self {
+        ColliderBroadPhaseData {
+            proxy_index: crate::INVALID_U32,
+        }
+    }
+}
+
+pub type ColliderShape = SharedShape;
+
+#[derive(Clone)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+pub enum ColliderMassProperties {
+    /// `MassProperties` are computed with the help of [`SharedShape::mass_properties`].
+    Density(Real),
+    MassProperties(Box<MassProperties>),
+}
+
+impl Default for ColliderMassProperties {
+    fn default() -> Self {
+        ColliderMassProperties::Density(1.0)
+    }
+}
+
+impl ColliderMassProperties {
+    pub fn mass_properties(&self, shape: &dyn Shape) -> MassProperties {
+        match self {
+            Self::Density(density) => shape.mass_properties(*density),
+            Self::MassProperties(mprops) => **mprops,
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+pub struct ColliderParent {
+    pub handle: RigidBodyHandle,
+    pub pos_wrt_parent: Isometry<Real>,
+}
+
+#[derive(Copy, Clone, Debug)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+pub struct ColliderPosition(pub Isometry<Real>);
+
+impl AsRef<Isometry<Real>> for ColliderPosition {
+    #[inline]
+    fn as_ref(&self) -> &Isometry<Real> {
+        &self.0
+    }
+}
+
+impl Deref for ColliderPosition {
+    type Target = Isometry<Real>;
+    #[inline]
+    fn deref(&self) -> &Isometry<Real> {
+        &self.0
+    }
+}
+
+impl Default for ColliderPosition {
+    fn default() -> Self {
+        Self::identity()
+    }
+}
+
+impl ColliderPosition {
+    #[must_use]
+    fn identity() -> Self {
+        ColliderPosition(Isometry::identity())
+    }
+}
+
+impl<T> From<T> for ColliderPosition
+where
+    Isometry<Real>: From<T>,
+{
+    fn from(position: T) -> Self {
+        Self(position.into())
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+pub struct ColliderGroups {
+    pub collision_groups: InteractionGroups,
+    pub solver_groups: InteractionGroups,
+}
+
+impl Default for ColliderGroups {
+    fn default() -> Self {
+        Self {
+            collision_groups: InteractionGroups::default(),
+            solver_groups: InteractionGroups::default(),
+        }
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
+pub struct ColliderMaterial {
+    pub friction: Real,
+    pub restitution: Real,
+    pub friction_combine_rule: CoefficientCombineRule,
+    pub restitution_combine_rule: CoefficientCombineRule,
+    pub solver_flags: SolverFlags,
+}
+
+impl ColliderMaterial {
+    pub fn new(friction: Real, restitution: Real) -> Self {
+        Self {
+            friction,
+            restitution,
+            ..Default::default()
+        }
+    }
+}
+
+impl Default for ColliderMaterial {
+    fn default() -> Self {
+        Self {
+            friction: 1.0,
+            restitution: 0.0,
+            friction_combine_rule: CoefficientCombineRule::default(),
+            restitution_combine_rule: CoefficientCombineRule::default(),
+            solver_flags: SolverFlags::default(),
+        }
+    }
+}