**3. 3D graphic in VR**

3D computer graphics are graphics that use a three-dimensional representation of geometric data that are stored in a computer for the purpose of performing calculations and rendering 2D images. Those geometric data are not graphics until they are presented on a screen. Geometric data can be perceived as objects or models. To build up a 3D world in virtual reality, it is needed to include graphic elements such as:


A combination of all mentioned graphic elements can result in scene as shown in **Figure 2** left. Another 3D scene can be seen in drone simulation environment represented in **Figure 2** right.
