Basic transition

glsl

/*
  GPGPU 
*/

attr vec2 p;  // current position
attr vec2 endP; // Final resting position in final image

/*
  Animate this between 0 and 1
  (0 == use curl movement) (1 == move towards endP)
*/
uniform float transition; 

void main(){

  vec2 nextCurlP = p + curl( p );
  vec2 nextEndP = ( endP - p ) * 0.04;
  
  gl_Position = mix( nextCurlP, nextEndP, transition);
}