more ikeda random

10/ikeda-00.frag

@@ -0,0 +1,46 @@
+// Author @patriciogv - 2015
+// http://patriciogonzalezvivo.com
+
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+float random (in float x) {
+    return fract(sin(x)*1e4);
+}
+
+float random (in vec2 st) { 
+    return fract(sin(dot(st.xy, vec2(12.9898,78.233)))* 43758.5453123);
+}
+
+float randomSerie(float x, float freq, float t) {
+    return step(.8,random( floor(x*freq)-floor(t) ));
+}
+
+void main() {
+    vec2 st = gl_FragCoord.xy/u_resolution.xy;
+    st.x *= u_resolution.x/u_resolution.y;
+    
+    vec3 color = vec3(0.0);
+
+    float cols = 2.;
+    float freq = random(floor(u_time))+abs(atan(u_time)*0.1);
+    float t = 60.+u_time*(1.0-freq)*30.;
+
+    if (fract(st.x*cols* 0.5) < 0.5){
+        t *= -1.0;
+    }
+
+    freq += random(floor(st.x));
+
+    float offset = 0.025;
+    color = vec3(randomSerie(st.y, freq*100., t+offset),
+                 randomSerie(st.y, freq*100., t),
+                 randomSerie(st.y, freq*100., t-offset));
+
+    gl_FragColor = vec4(color,1.0);
+}

10/ikeda-01.frag

@@ -0,0 +1,40 @@
+// Author @patriciogv - 2015
+// http://patriciogonzalezvivo.com
+
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+float random (in float x) {
+    return fract(sin(x)*1e4);
+}
+
+float random (in vec2 st) { 
+    return fract(sin(dot(st.xy, vec2(12.9898,78.233)))* 43758.5453123);
+}
+
+void main() {
+    vec2 st = gl_FragCoord.xy/u_resolution.xy;
+    st.x *= u_resolution.x/u_resolution.y;
+    
+    vec3 color = vec3(0.0);
+
+    float t = u_time*24.*2.;
+
+    vec2 grid = vec2(2.0,50.0);
+    vec2 ipos = floor(st*grid);
+    vec2 fpos = fract(st*grid);
+
+    float value = random(floor(ipos.y+t));// * pow(smoothstep(0.,.2,(1.0-ipos.y/grid.y)),.9)*mix((0.5+ipos.y/grid.y),1.0,1.0-ipos.y/grid.y) ;
+
+    if (ipos.x == 0.) {
+        fpos = 1.0-fpos;
+    }
+    color += step(fpos.x*1.5,value);
+
+    gl_FragColor = vec4(color,1.0);
+}

10/ikeda-02.frag

@@ -9,6 +9,10 @@ uniform vec2 u_resolution;
 uniform vec2 u_mouse;
 uniform float u_time;
 
+float random (in float x) {
+    return fract(sin(x)*1e4);
+}
+
 float random (in vec2 _st) { 
     return fract(sin(dot(_st.xy,
                          vec2(12.9898,78.233)))* 
@@ -17,22 +21,23 @@ float random (in vec2 _st) {
 
 void main() {
     vec2 st = gl_FragCoord.xy/u_resolution.xy;
-    st *= vec2(10.0,100.);
+    st.x *= u_resolution.x/u_resolution.y;
+    st *= vec2(100.0,50.);
+    vec3 color = vec3(0.0);
 
     vec2 ivec = floor(st);  // integer
     vec2 fvec = fract(st);  // fraction
     
     vec2 vel = floor(vec2(u_time*10.)); // time
     vel *= vec2(-1.,0.); // direction
-    vel *= (step(1., mod(ivec.y,2.0))-0.5)*2.; 
-    
-    ivec += vel;
 
+    // vel *= (step(1., mod(ivec.y,2.0))-0.5)*2.; // Oposite directions
+    vel *= random(ivec.y); // random speed
+    
+    // Move
+    ivec += floor(vel);
     // Assign a random value base on the integer coord
-    vec3 color = vec3( step(.8,random( ivec ))); 
-
-    // Un comment to see the subdivided grid
-//     color = vec3(fvec,0.0);
+    color = vec3(1.0-step(.8,random(ivec)));
 
     gl_FragColor = vec4(color,1.0);
 }

10/ikeda-03.frag

@@ -0,0 +1,46 @@
+// Author @patriciogv - 2015
+// http://patriciogonzalezvivo.com
+
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+float random (in float x) {
+    return fract(sin(x)*1e4);
+}
+
+float random (in vec2 st) { 
+    return fract(sin(dot(st.xy, vec2(12.9898,78.233)))* 43758.5453123);
+}
+
+float randomSerie(float x, float freq, float t) {
+    return step(.8,random( floor(x*freq)-floor(t) ));
+}
+
+void main() {
+    vec2 st = gl_FragCoord.xy/u_resolution.xy;
+    st.x *= u_resolution.x/u_resolution.y;
+    
+    vec3 color = vec3(0.0);
+
+    float cols = 2.;
+    float freq = random(floor(u_time))+abs(atan(u_time)*0.1);
+    float t = 60.+u_time*(1.0-freq)*30.;
+
+    if (fract(st.x*cols* 0.5) < 0.5){
+        t *= -1.0;
+    }
+
+    freq += random(floor(st.x));
+
+    float offset = 0.025;
+    color = vec3(randomSerie(st.y, freq*100., t+offset),
+                 randomSerie(st.y, freq*100., t),
+                 randomSerie(st.y, freq*100., t-offset));
+
+    gl_FragColor = vec4(color,1.0);
+}