A Fast Plotting Method for 3D Directional Marker

摘要

To improve the plotting performance for the 3D directional marker in virtual environment, propose a fast plotting method based on gradient field. The method can plot the 3D directional terrain-matching marker conveniently on the 3D terrain. The terrain height data are transformed into the gradient field. It obtains the maximum affection region and locates the key position to matching the terrain. The final shape of the markers can be obtained by interpolating these key positions via the Catmull-Rom algorithm. The experimental results denoted that the method can plot the 3D directional marker quickly. The realistic effect can be expressed by the method proposed in the paper.