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Fix bug where z near -up yielded degenerate basises

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atlas 2025-07-09 00:36:17 -04:00
parent d1fce0d517
commit f9fb5735be
1 changed files with 1 additions and 1 deletions
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crates/bevy_render/src/maths.wgsl
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@ -70,7 +70,7 @@ fn mat4x4_to_mat3x3(m: mat4x4<f32>) -> mat3x3<f32> {
// [1]: https://math.stackexchange.com/a/1849294
fn orthonormalize(z_basis: vec3<f32>) -> mat3x3<f32> {
var up = vec3(0.0, 1.0, 0.0);
if (dot(up, z_basis) > 0.99) {
if (abs(dot(up, z_basis)) > 0.99) {
up = vec3(1.0, 0.0, 0.0); // Avoid creating a degenerate basis.
}
let x_basis = normalize(cross(z_basis, up));