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Fix gizmo clipping again #21503

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Merged
merged 1 commit into from
Oct 13, 2025
Merged

Fix gizmo clipping again #21503

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7 changes: 2 additions & 5 deletions crates/bevy_gizmos/src/lines.wgsl
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Original file line number Diff line number Diff line change
Expand Up @@ -137,14 +137,11 @@ fn vertex(vertex: VertexInput) -> VertexOutput {

fn clip_near_plane(a: vec4<f32>, b: vec4<f32>) -> vec4<f32> {
// Move a if a is behind the near plane and b is in front.
// equivalent to `a.z / a.w > 1.0 && b.z / b.w <= 1.0` but avoids divs
if a.z * sign(a.w) > abs(a.w) && b.z * sign(b.w) <= abs(b.w) {
if a.z > a.w && b.z <= b.w {
// Interpolate a towards b until it's at the near plane.
let distance_a = a.z - a.w;
let distance_b = b.z - b.w;
// Add an epsilon to the interpolator to ensure that the point is
// not just behind the clip plane due to floating-point imprecision.
let t = distance_a / (distance_a - distance_b) + EPSILON;
let t = distance_a / (distance_a - distance_b);
return mix(a, b, t);
}
return a;
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