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Bias octahedral tangent y axis to avoid errors around 0

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This commit is contained in:
clayjohn 2023-02-13 19:24:14 -08:00
parent 4a2c2170b4
commit 5a800e68f1
1 changed files with 2 additions and 0 deletions
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core/math/vector3.cpp
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@ -108,7 +108,9 @@ Vector3 Vector3::octahedron_decode(const Vector2 &p_oct) {
} }
Vector2 Vector3::octahedron_tangent_encode(const float sign) const { Vector2 Vector3::octahedron_tangent_encode(const float sign) const {
const float bias = 1.0f / 32767.0f;
Vector2 res = this->octahedron_encode(); Vector2 res = this->octahedron_encode();
res.y = MAX(res.y, bias);
res.y = res.y * 0.5f + 0.5f; res.y = res.y * 0.5f + 0.5f;
res.y = sign >= 0.0f ? res.y : 1 - res.y; res.y = sign >= 0.0f ? res.y : 1 - res.y;
return res; return res;