Lesson 6 of 10 · Strange attractors on the GPU
Ping-pong
Two buffers alternating every frame.
You cannot read and write the same buffer at once. The solution is as old as videogames: two buffers. Read A and write B. On the next frame, reverse them. Ping-pong.
A → B → ATwo buffers take turns. While one is read, the other is filled. They never collide.
Move Stretch and Inflate: they edit
d and a in the equation. The form reconfigures instantly.The code
vec3 attractor(vec3 p){
// Aizawa · mueve los números y mira
float a=0.95, b=0.70, c=0.60, d=3.50, e=0.25, f=0.10;
float dx = (p.z - b)*p.x - d*p.y;
float dy = d*p.x + (p.z - b)*p.y;
float dz = c + a*p.z - p.z*p.z*p.z/3.0
- (p.x*p.x + p.y*p.y)*(1.0 + e*p.z) + f*p.z*p.x*p.x*p.x;
return vec3(dx, dy, dz);
}