Real Time Animation of Trees Based on BBSC in Computer Games

Abstract

That researchers in the field of computer games usually find it is difficult to simulate the motion of actual 3D model trees lies in the fact that the tree model itself has very complicated structure, and many sophisticated factors need to be considered during the simulation. Though there are some works on simulating 3D tree and its motion, few of them are used in computer games due to the high demand for real-time in computer games. In this paper, an approach of animating trees in computer games based on a novel tree model representation-Ball B-Spline Curves (BBSCs) are proposed. By taking advantage of the good features of the BBSC-based model, physical simulation of the motion of leafless trees with wind blowing becomes easier and more efficient. The method can generate realistic 3D tree animation in real-time, which meets the high requirement for real time in computer games.

Effects of Wind on Virtual Plants in Animation

“…Wind velocity is characterized by its speed and direction [20]. Existing methods simulate wind by distinguishing between gusts and stable winds [14,21] and by treating it as a fluid flow modeled by the Navier-Stokes equations [12,[22][23][24]. We assume that w , the velocity of the wind at time everywhere in the simulation, is set according to a wind model.…”

G²-Continuity Extension Algorithm of Ball B-Spline Curves

“…After that, the BBSC is applied to different fields like modeling tubular objects [3], and modeling plant stem [4], leaf [5] and root [6]. These plant models are also used in computer game [7] and computer animation [8]. BBSC is also used for representing blood vascular [9].…”