GPU Pro 6

8 I Geometry Manipulation

Figure 1.4. Color coded mesh topology for L =8andL

c

=4.

Figure 1.5. Wire frame showing different levels of terrain mesh detail.

The following level shift is used to skip resolution levels that are too small for

the camera at ground height:

int shift=( int ) floor ( log (1+cameragroundheight /5));

The CPU code is

float snapvalue=Q ;

float snapmax=2 snapvalue ;

possnap0 . x=floor ( camerapos . x / snapmax +0.01f ) snapmax ;

1. Dynamic GPU Terrain 9

possnap0 . z=floor ( camerapos . z / snapmax +0.01f ) snapmax ;

float levelsnap=snapvalue ...