From c7ed2c99c12747ce8dc765e0ac0f40967bc8bacd Mon Sep 17 00:00:00 2001
From: Crozet Sébastien <developer@crozet.re>
Date: Sun, 22 Nov 2020 16:36:19 +0100
Subject: Heightfield and trimesh demos: ensure the heights are generated
 deterministically.

---
 examples3d/heightfield3.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'examples3d/heightfield3.rs')

diff --git a/examples3d/heightfield3.rs b/examples3d/heightfield3.rs
index 6af93c7..59380d5 100644
--- a/examples3d/heightfield3.rs
+++ b/examples3d/heightfield3.rs
@@ -1,4 +1,4 @@
-use na::{DMatrix, Point3, Vector3};
+use na::{ComplexField, DMatrix, Point3, Vector3};
 use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
 use rapier3d::geometry::{ColliderBuilder, ColliderSet};
 use rapier_testbed3d::Testbed;
@@ -23,7 +23,11 @@ pub fn init_world(testbed: &mut Testbed) {
         } else {
             let x = i as f32 * ground_size.x / (nsubdivs as f32);
             let z = j as f32 * ground_size.z / (nsubdivs as f32);
-            x.sin() + z.cos()
+
+            // NOTE: make sure we use the sin/cos from simba to ensure
+            // cross-platform determinism of the example when the
+            // enhanced_determinism feature is enabled.
+            (<f32 as ComplexField>::sin(x) + <f32 as ComplexField>::cos(z))
         }
     });
 
-- 
cgit