Very early gpu gems series books have been introduced to the rendering of large-scale grass, although the technology inside is old but very practical.
I made a certain modification on the basis of their description, by increasing the vertices without using any alpha test, and reducing the use of the billboard through the intersection of a super large grid.
In addition, I have added additional interactive features that require OpenGL 3.0 support. You can see that when the ball moves, the grass will fall in the right direction.
I drew a love through the ball.
The entire grassland can still have excellent performance on mobile phones.
