GLSL wave function give a 2D coordinate. Thanks: http://http.developer.nvidia.com/GPUGems/gpugems_ch02.html #wave #glsl #opengl #lib

GLSL-Wave-Equation.glsl

#define VTXSIZE 0.80   // Amplitude
#define WAVESIZE 100.0  // Frequency
#define FACTOR 1.2
#define SPEED 2.0
#define OCTAVES 3

// Example of the same wave function used in the vertex engine
lowp float wave(lowp float x,
           lowp float y,
           lowp float timer)
{
    lowp float z;
    int octaves;
    lowp float factor;
    lowp float d;

    z = 0.0;
    octaves = OCTAVES;
    factor = FACTOR;
    d = sqrt(x * x + y * y);
    
    do {
        z -= factor * cos(timer * SPEED + (1.0/factor) * x * y * WAVESIZE);
        factor = factor/2.0;
        octaves--;
    } while (octaves > 0);
    
    return 2.0 * VTXSIZE * d * z;
    
}