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| author | Nat Lasseter <user@4574.co.uk> | 2024-06-24 22:51:51 +0100 |
|---|---|---|
| committer | Nat Lasseter <user@4574.co.uk> | 2024-06-24 22:51:51 +0100 |
| commit | 3deef4d969dd50ddf540b80fe43ef16af5c17169 (patch) | |
| tree | 456754a9bffb31471f2e64698afb8ee95aebca93 /hittable.go | |
| parent | d248e30d365d5e401d5cd372aa415fb2f9a39326 (diff) | |
Chapter 11
Diffstat (limited to 'hittable.go')
| -rw-r--r-- | hittable.go | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/hittable.go b/hittable.go index 42599ab..ac5e996 100644 --- a/hittable.go +++ b/hittable.go @@ -11,12 +11,14 @@ type HitRecord struct { P Vec3 N Vec3 T float64 + F bool Mat Material } func (rec *HitRecord) SetFaceNormal(r Ray, out_n Vec3) { - if r.Direction.Dot(out_n) < 0 { - rec.N = out_n + rec.F = r.Direction.Dot(out_n) < 0; + if rec.F { + rec.N = out_n; } else { rec.N = out_n.Neg(); } |