captainproton42 / 2dgrassshaderdemo Goto Github PK

I find that there are for loop, and in some situations, we can add break to make better performance. at least for your situation, add break does not affect the result

I think only in few situations this will cause influence

Wonderful project. I always think using shader to do dynamic grass, this give me good ideas. When i follow your instructions, i found one problem:

you use float equals, and i find this is not safe. if use
if dist / 255.0 == texture(tex, uv).r
the result will be wrong

and use
if (abs(dist / 255.0 - texture(tex, uv).r) < 0.0000001), the result will be correct. Maybe for float, use equal is not safe

Thanks for making and publishing this ❤️

Hello, I found that using viewport had many problems, for example, when i use environment and
canvasmodulate, or using character camera2D. So I decided to realize your method using sprite directly. Now I almost finished it.

I setup the scene as following , without any viewport.

I realized following fuctions:

1. can generate grass in any positions , not limited by environment and camera2d
2. can dynamically interacted with mouse go generate new height grass
3. can have wind and noise like yours
4. can have the right "grass hide some portion of character" effect

All in all, without viewport I can realize all your functions, and viewport have many limitions. So Why you use viewport and not sprite directly???