Chapter 3 Section 5 select details (level of detail)

select the level of detail ( dump )

The next step is to determine the level of detail (Level of detial). The level of detail utilizes our weakness in human recognition of distant objects. Therefore, we use a few polygon to construct an object far from the viewpoint. We use more polygon to construct an object near the viewpoint.

 

In the past, we needed to store the object mesh at each level of detail (Mesh ) Version. Then we can select the best mesh based on the distance from the current camera. Although you can continue using this methodMicrosoft Provides a better method. This improved method is called improved grid (Progressive Mesh ). The details of creating and using improved grids are described in the next chapter. One problem to be solved in this chapter is (The point to take away from this chapter is this ): By specifying the number of polygon to be drawn based on the distance between the mesh and the camera, we will improve the performance. Small, simple objects using improved grids will not benefit us. The improved mesh is designed for objects with many details when approaching the camera.