fix(quaternion): first test for quaternion

test/quternion.js

@@ -0,0 +1,28 @@
+import { assert } from 'chai';
+import { fromOrientation, IQuaternion } from '../src/quaternion';
+
+describe('simple Quaternino tests.', () => {
+  it('should work with fromOrientation', () => {
+    const alpha = fromOrientation({ alpha: 90, beta: 0, gamma: 0 }, 90);
+    assert.instanceOf(alpha, IQuaternion);
+    console.log(`alpha ${alpha}`);
+    assert.closeTo(alpha.x, -0.7071067811865475, 0.001);
+    assert.closeTo(alpha.y, 0, 0.001);
+    assert.closeTo(alpha.z, 0, 0.001);
+    assert.closeTo(alpha.w, 0.7071067811865475, 0.001);
+
+    const beta = fromOrientation({ alpha: 0, beta: 90, gamma: 0 }, 90);
+    console.log(`beta ${beta}`);
+    assert.closeTo(beta.x, 0, 0.001);
+    assert.closeTo(beta.y, 0, 0.001);
+    assert.closeTo(beta.z, -0.7071067811865475, 0.001);
+    assert.closeTo(beta.w, 0.7071067811865475, 0.001);
+
+    const gamma = fromOrientation({ alpha: 0, beta: 0, gamma: 90 }, 90);
+    console.log(`gamma ${gamma}`);
+    assert.closeTo(gamma.x, -0.7071067811865475, 0.001);
+    assert.closeTo(gamma.y, 0, 0.001);
+    assert.closeTo(gamma.z, -0.7071067811865476, 0.001);
+    assert.closeTo(gamma.w, 0, 0.001);
+  });
+});