A wavy, warbly fragment shader.

wavy-warble-shader.md

wavy-warble.frag

#ifdef GL_ES
precision highp float;
#endif

uniform float u_time;
uniform vec2 u_resolution;
uniform sampler2DRect u_texture;
uniform vec3 u_color_text;
uniform vec3 u_color_bg;

void main() {
    vec2 coord = vec2(gl_FragCoord.x, u_resolution.y - gl_FragCoord.y);
    vec2 uv = gl_FragCoord.xy / u_resolution;

    coord.x *= fract(sin(gl_FragCoord.x * u_time * 0.04) * 0.05);
    coord.y *= fract(sin(gl_FragCoord.y * u_time * 0.04) * 0.05);


    vec4 color = texture2DRect(u_texture, coord);
    gl_FragColor = color;
}