adding shaders to the repo

shader_experiments/Shaders/process/s-wobble.frag

@@ -0,0 +1,41 @@
+//pro-shader
+#ifdef GL_ES
+precision highp float;
+#endif
+
+varying vec2 v_texcoord;
+uniform sampler2D u_tex0;
+uniform vec2 u_resolution;
+uniform float u_time;
+uniform float u_x0;
+uniform float u_x1;
+uniform float u_x2;
+
+void main(){
+
+vec2 pos = v_texcoord * u_resolution;
+vec2 centre = u_resolution / 2.0;
+vec2 norm = pos - centre;
+//float r = distance(u_resolution, pos);
+float r = length(norm);
+//float theta = acos(norm.x / r);
+float theta = atan(pos.y / pos.x);
+//float newTheta = theta + 0.000;
+theta += u_time*u_x0;
+//pos.x = r*cos(theta) + centre.x;
+pos.y = 4.0*u_x1*r*sin(theta) + centre.y;
+pos.x = 4.0*(1.0-u_x2)*r*cos(theta) + centre.x;
+//pos.y = r*sin(radians(theta)) + centre.y;
+
+
+
+
+vec4 color = texture2D(u_tex0, pos / u_resolution);
+
+gl_FragColor = color;
+
+
+}
+
+
+