Function triangleNormal

src/utils/sim3dAlignment.test.ts:19–28

(
  p1: THREE.Vector3,
  p2: THREE.Vector3,
  p3: THREE.Vector3
)

}

function triangleNormal(
  p1: THREE.Vector3,
  p2: THREE.Vector3,
  p3: THREE.Vector3
): THREE.Vector3 {
  return new THREE.Vector3()
    .subVectors(p2, p1)
    .cross(new THREE.Vector3().subVectors(p3, p1))
    .normalize();
}

function expectIdentity(sim3d: Sim3d): void {
  expect(sim3d.scale).toBe(1);