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Heightfield and trimesh demos: ensure the heights are generated deterministically.

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Crozet Sébastien
2020-11-22 16:36:19 +01:00
parent 000aad0a3c
commit c7ed2c99c1
2 changed files with 11 additions and 4 deletions
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8
examples3d/heightfield3.rs
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@@ -1,4 +1,4 @@
use na::{DMatrix, Point3, Vector3}; use na::{ComplexField, DMatrix, Point3, Vector3};
use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet}; use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
use rapier3d::geometry::{ColliderBuilder, ColliderSet}; use rapier3d::geometry::{ColliderBuilder, ColliderSet};
use rapier_testbed3d::Testbed; use rapier_testbed3d::Testbed;
@@ -23,7 +23,11 @@ pub fn init_world(testbed: &mut Testbed) {
} else { } else {
let x = i as f32 * ground_size.x / (nsubdivs as f32); let x = i as f32 * ground_size.x / (nsubdivs as f32);
let z = j as f32 * ground_size.z / (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))
} }
}); });

7
examples3d/trimesh3.rs
View File

@@ -1,4 +1,4 @@
use na::Point3; use na::{ComplexField, Point3};
use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet}; use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
use rapier3d::geometry::{ColliderBuilder, ColliderSet}; use rapier3d::geometry::{ColliderBuilder, ColliderSet};
use rapier_testbed3d::Testbed; use rapier_testbed3d::Testbed;
@@ -30,7 +30,10 @@ pub fn init_world(testbed: &mut Testbed) {
// so we switch z and y here and set a random altitude at each point. // so we switch z and y here and set a random altitude at each point.
for p in vertices.iter_mut() { for p in vertices.iter_mut() {
p.z = p.y; p.z = p.y;
p.y = (p.x.sin() + p.z.cos()) * ground_height; // 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.
p.y = (<f32 as ComplexField>::sin(p.x) + <f32 as ComplexField>::cos(p.z)) * ground_height;
if p.x.abs() == ground_size / 2.0 || p.z.abs() == ground_size / 2.0 { if p.x.abs() == ground_size / 2.0 || p.z.abs() == ground_size / 2.0 {
p.y = 10.0; p.y = 10.0;