Build a rotation matrix from a list of Euler angles. The default axis
EulerMatrix[{α, β, γ}]
EulerMatrix[{α, β, γ}, {a, b, c}]
EulerMatrix[{0, 0, 0}]
→ {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}}EulerMatrix[{Pi/2, 0, 0}]
→ {{0, -1, 0}, {1, 0, 0}, {0, 0, 1}}EulerMatrix[{Pi, 0, 0}]
→ {{-1, 0, 0}, {0, -1, 0}, {0, 0, 1}}