Adding Vectors in Space Demo

① This example demonstrates the geometric addition of two vectors in three‑dimensional space, showing how the resultant vector is formed. ② Core mathematical concepts include vectors, vector addition, 3D coordinate systems, and the use of planes and polygons as construction aids. ③ Construction highlights: Vector commands create u, v, w; Plane draws reference planes; Polygon builds auxiliary polygons; Textfield together with InputP/InputQ enables coordinate entry; buttons (button1‑button4) control animation steps; a speed slider adjusts playback rate; objects O, P, Q, c, h, i, poly, r, o, p serve as base points, endpoints, and intermediate construction elements. ④ Suitable for high‑school solid geometry and introductory university linear algebra courses, and for interactive classroom illustration of vector operations.