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fixes #135

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This commit is contained in:
Harry Chen
2026-10-01 11:28:25 -04:00
parent 62be4bbe74
commit dcab26f00d
1 changed files with 3 additions and 2 deletions
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src/app/gui/PreviewRenderer.cpp
+3 -2
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@@ -76,8 +76,9 @@ bool lens_valid(vec2 gl) {
if (u_tier == 0) return true;
const float e = 1e-3;
vec2 f = lens(gl);
vec2 jx = (lens(gl + vec2(e, 0.0)) - f) / e, jy = (lens(gl + vec2(0.0, e)) - f) / e;
float jd = min(jx.x * jy.y - jy.x * jx.y, min(jx.x, jy.y));
vec2 dx = lens(gl + vec2(e, 0.0)) - f, dy = lens(gl + vec2(0.0, e)) - f;
// Not min(det, min(a, b)) with det = fma(a, b, ..): LLVM's InstSimplify segfaults (#135).
float jd = min((dx.x * dy.y - dy.x * dx.y) / (e * e), min(dx.x, dy.y) / e);
return jd > 0.25 && jd < 4.0 && dot(gl, f) >= 0.0;
}
vec2 project_ndc(vec3 v, out bool clipped) {