From 03b437f278bbcbd391acd23a4d8fa074915eb00c Mon Sep 17 00:00:00 2001
From: Sébastien Crozet <developer@crozet.re>
Date: Mon, 31 Aug 2020 19:04:32 +0200
Subject: Disallow contacts between two colliders attached to the same parent.

---
 Cargo.toml                   | 7 +++++++
 examples3d/Cargo.toml        | 2 +-
 src/geometry/narrow_phase.rs | 7 ++++++-
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 32e6107..a766033 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,3 +10,10 @@ debug = false
 codegen-units = 1
 #opt-level = 1
 #lto = true
+
+
+#[profile.dev.package.rapier3d]
+#opt-level = 3
+#
+#[profile.dev.package.kiss3d]
+#opt-level = 3
\ No newline at end of file
diff --git a/examples3d/Cargo.toml b/examples3d/Cargo.toml
index 3176696..8091db8 100644
--- a/examples3d/Cargo.toml
+++ b/examples3d/Cargo.toml
@@ -24,4 +24,4 @@ path = "../build/rapier3d"
 
 [[bin]]
 name = "all_examples3"
-path = "./all_examples3.rs"
\ No newline at end of file
+path = "./all_examples3.rs"
diff --git a/src/geometry/narrow_phase.rs b/src/geometry/narrow_phase.rs
index 3eb2c30..1a36511 100644
--- a/src/geometry/narrow_phase.rs
+++ b/src/geometry/narrow_phase.rs
@@ -96,7 +96,7 @@ impl NarrowPhase {
                 }
 
                 // We have to manage the fact that one other collider will
-                // hive its graph index changed because of the node's swap-remove.
+                // have its graph index changed because of the node's swap-remove.
                 if let Some(replacement) = self
                     .proximity_graph
                     .remove_node(proximity_graph_id)
@@ -129,6 +129,11 @@ impl NarrowPhase {
                     if let (Some(co1), Some(co2)) =
                         colliders.get2_mut_internal(pair.collider1, pair.collider2)
                     {
+                        if co1.parent == co2.parent {
+                            // Same parents. Ignore collisions.
+                            continue;
+                        }
+
                         if co1.is_sensor() || co2.is_sensor() {
                             let gid1 = co1.proximity_graph_index;
                             let gid2 = co2.proximity_graph_index;
-- 
cgit