Particle Tornado 粒子龙卷
Particles spiral outward and upward, then recycle — the funnel shape is a linear map from radius to height. 粒子向外、向上螺旋，然后回收——漏斗的形状就是「半径到高度」的一个线性映射。
Runs live on this page. Move the pointer, click, or drag — whichever the effect listens for. 就在本页实时运行。移动鼠标、点击或拖拽——看它响应哪一种。
How it works原理拆解
Y is 20 + r*3.1, so height is literally derived from radius: small radius means high up, large radius means near the ground. That single line produces the cone. Adding p.r*0.05 to the angle makes the spiral tighten as it rises, which is what gives it the twisting look. Y 是 20 + r*3.1，也就是高度直接由半径算出来：半径小就在高处，半径大就贴地。这一行就画出了锥形。角度上再加 p.r*0.05，螺旋会越往上越紧，扭转感就是这么来的。
What to change可以改的地方
- 1Change 3.1 to 1.8 for a squat, wide funnel.
- 2Increase the angle drift so the bands become more visible.
- 13.1 改成 1.8，漏斗会变矮变宽。
- 2加大角度漂移，螺旋的层次会更清楚。
Source code源码
Self-contained — paste it into any HTML file and it runs. No libraries. 完全独立——粘进任意 HTML 文件就能跑，不需要任何库。