* Update Box3.html

* Update Box2.html

* Update Box3.html

* Update Box3.html

* Update Box3.html

* Update Box3.html

* Update Box3.html

* Update Plane.html

* Update Plane.html

* Update Plane.html

* Update Plane.html

* Update Plane.html

* Update Sphere.html

* Update Sphere.html

* Update Sphere.html

* Update Spherical.html

* Update Spherical.html

* Update Spherical.html

* Update Triangle.html

* Update Frustum.html

* Update Frustum.html

* Update Frustum.html

* Update Color.html

* Update MathUtils.html

* Update Color.html

* Update Color.html

* Update MathUtils.html

* Update Plane.html

* Update Box3.html

* Update Box3.html

* Update MathUtils.html

* Update Vector3.html

* Update Vector3.html

* Update Vector3.html

* Update Vector3.html

* Update Vector3.html

* Update Vector3.html

* Update Vector3.html

* Update Vector3.html

* Update Vector3.html

* Update Vector4.html

* Update Quaternion.html

* Update Quaternion.html

* Update Quaternion.html

* Update Quaternion.html

* Update Matrix3.html

* Update Matrix3.html

* Update Matrix3.html

* Update Matrix4.html

* Update Matrix4.html

* Update Matrix4.html

* Update Matrix4.html

* Update Matrix3.html

* Update Matrix4.html

* Update Ray.html

* Update Ray.html

* Update Matrix4.html

* Update Matrix4.html

* Update Matrix3.html

* Update Matrix4.html

* Color: added support for add color values using uppercase

* Update Color.html

* Update Color.html

* Update Color.html

* Update Color.html

* Update Color.html

* Quaternion: Add slerpQuaternions(), deprecate static slerp().

* Examples: Clean up.

* Quaternion: Improve warning.

* Sphere: Add expandByPoint() and union().

* Tests: Clean up.

smootherstep: “任何x比最大值还大会返回1”

Add test

zh doc: check the diff in api folder in en doc from 6cfccee1 to r119.1