IJIMT 2013 Vol.4(3): 346-350 ISSN: 2010-0248
DOI: 10.7763/IJIMT.2013.V4.419

Flight Trajectory of a Golf Ball for a Realistic Game

Seongmin Baek and Myunggyu Kim
Abstract— This paper suggests a new flight model for a realistic golf game simulation. The forces at work in a ball during flight include lift, drag, and gravity. A golf ball flying at a high spinning speed has a different lift and drag according to its spin rate and Reynolds number. Also, the drag force of a ball is largely different according to the size, depth, and number of dimples in the ball. However, these differences are not reflected in golf game simulations. This paper suggests a method for changing the simulated flight distance of a golf ball in accordance with its drag based on changes in Reynolds number and dimple characteristics. Also, since the flight distance of a ball changes in real world depending on the temperature, humidity, and altitude, these changes should be reflected in realistic games as well. When the temperature, humidity, and altitude are given, the density and pressure of air in the virtual environment are calculated, and through these calculated values, the flight distance of the ball can be changed. Finally, the effect of wind should be considered. Usually, in games, the wind effect is handled using a constant term. However, the strength of a real wind changes following its height. By applying a function reflecting this change, the strength of the wind is reflected differently according to the elevation of the ball. Through the method suggested in this paper, we can calculate a realistic flight trajectory for a simulated golf ball.

Index Terms— Spinning ball, flying trajectory, aerodynamic characteristics.

The authors are with the Visual Contents Research Department, Electronics and Telecommunications Research Institute, Daejeon, Korea (e-mail: {baeksm, mgkim}@ etri.re.kr).

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Cite: Seongmin Baek and Myunggyu Kim, " Flight Trajectory of a Golf Ball for a Realistic Game," International Journal of Innovation, Management and Technology vol. 4, no. 3, pp. 346-350, 2013.

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