Procedural Animation - Animated Texture

Path of the scene: [01_procedural/c_texture]
This code display a quadrangle with a procedural animated texture image. The computation of the texture image is directly performed in a fragment shader in the file shaders/animated_texture/animated_texture.frag.glsl.

An initial procedural texture is available in the example code and display an evolving random texture in the radial direction using polar coordinates.
Objective: Adapt the code of the fragment shader to reproduce the effect displayed in the following example.

[Interactive view]