troughton

struct Vertex {
    vec3 value;
    vec3 directionalDerivativeU;
    vec3 directionalDerivativeV;
};

void AmbientDice::hybridCubicBezierWeights(u32 i0, u32 i1, u32 i2, float b0, float b1, float b2, VertexWeights *w0Out, VertexWeights *w1Out, VertexWeights *w2Out) const {
        const float alpha = 0.5f * sqrt(0.5f * (5.0f + sqrt(5.0f))); // 0.9510565163
        const float beta = -0.5f * sqrt(0.1f * (5.0f + sqrt(5.0f))); // -0.4253254042