commit 0e23850ebcd8a0a3ebd394de54d64b33ca714905
Author: powertomato <powertomato@gmail.com>
Date:   Wed Oct 2 21:18:25 2019 +0200

    First commit

diff --git a/2D/BoxTiling.glsl b/2D/BoxTiling.glsl
new file mode 100644
index 0000000..8fd15ba
--- /dev/null
+++ b/2D/BoxTiling.glsl
@@ -0,0 +1,27 @@
+
+#iChannel0 "https://i.imgur.com/TnmUwCn.jpg"
+
+float XNUM = 10.;
+float YNUM = 10.;
+
+vec4 BoxCoords(vec2 uv) {
+
+    vec2 gv = fract(uv);
+    vec2 id = floor(uv);
+    //standard uv
+    return vec4(gv.x, gv.y, id.x, id.y);
+}
+
+void mainImage ( out vec4 fragColor, in vec2 fragCoord) {
+    vec2 uv = (fragCoord-0.5*iResolution.xy)/iResolution.y;
+    
+    vec3 col = vec3(0.0);
+    uv.x *= 10.0;
+    uv.y *= 5.0;
+    
+    vec4 coord = BoxCoords(uv);
+    col.rgb = texture(iChannel0, coord.xy).rgb;
+    col.rgb *= vec3(smoothstep(0.09, 0.99, sin(coord.z+coord.w/17.+iTime) ));
+
+    fragColor = vec4(col, 1.0);
+}
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diff --git a/2D/HexTiling.glsl b/2D/HexTiling.glsl
new file mode 100644
index 0000000..58a2d3c
--- /dev/null
+++ b/2D/HexTiling.glsl
@@ -0,0 +1,49 @@
+
+#iChannel0 "https://i.imgur.com/TnmUwCn.jpg"
+
+float SQRT3 = 1.73205080757;
+
+float HexDist(vec2 p) {
+    p = abs(p);
+    float c = dot(p, normalize(vec2(1,SQRT3)));
+    c = max(c, p.x);
+    return c;
+}
+
+vec4 HexCoords(vec2 uv) {
+    vec2 r = vec2(1, SQRT3);
+    vec2 h = r/2.0;
+
+    vec2 a = mod(uv, r)-h;
+    vec2 b = mod(uv-h, r)-h;
+    vec2 gv = length(a) < length(b) ? a : b;
+
+    vec2 id = uv-gv;
+    //standard uv
+    return vec4(gv.x, gv.y, id.x, id.y);
+     
+    // polar coord uv
+    // float x = atan(gv.y, gv.x);
+    // float y = HexDist(gv);
+    // return vec4(x, y, id.x, id.y);
+
+
+    // polar coord 2 uv
+    // float x = atan(gv.y, gv.x);
+    // float y = 0.5-HexDist(gv);
+    // return vec4(x, y, id.x, id.y);
+}
+
+void mainImage ( out vec4 fragColor, in vec2 fragCoord) {
+    vec2 uv = (fragCoord-0.5*iResolution.xy)/iResolution.y;
+    
+    vec3 col = vec3(0.0);
+    uv *= 10.0;
+    
+    vec4 hc = HexCoords(uv);
+    //col.rg = hc(uv).xy;
+    col.rgb = texture(iChannel0, hc(uv).xy+0.5).rgb;
+    col.rgb *= vec3(smoothstep(0.09, 0.99, sin(hc.z+hc.w/17.+iTime) ));
+
+    fragColor = vec4(col, 1.0);
+}
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diff --git a/2D/Noise.glsl b/2D/Noise.glsl
new file mode 100644
index 0000000..aef6cfd
--- /dev/null
+++ b/2D/Noise.glsl
@@ -0,0 +1,43 @@
+
+float N21(vec2 p) {
+    //return fract( sin(p.x*100.0+p.y*6574.0)*5647.0 );
+    p = fract(p*vec2(233.32, 851.73));
+    p += dot(p, p+23.45);
+    return fract(p.x*p.y);
+}
+
+float SmoothNoise(vec2 uv) {
+    vec2 lv = fract(uv);
+    vec2 id = floor(uv);
+
+    lv = smoothstep(0.0,1.0, lv); // = lv*lv*(3.-2.*lv);
+
+    float bl = N21(id);
+    float br = N21(id+vec2(1.0, 0.0));
+    float b = mix(bl, br, lv.x);
+
+    float tl = N21(id+vec2(0.0,1.0));
+    float tr = N21(id+vec2(1.0,1.0));
+    float t = mix(tl, tr, lv.x);
+
+    return mix(b,t, lv.y);
+}
+
+float SmoothNoise2(vec2 uv, int ocataves) {
+    float c = 0.0; 
+    float norm = 0.0; 
+    float limit = pow(2.0, float(ocataves));
+    for(float i=1.0; i<=limit; i*=2.0){
+        float norm_fract = 1.0/i;
+        c += SmoothNoise(uv*i)*norm_fract;
+        norm+= norm_fract;
+    }
+
+    return c/norm;
+}
+
+void mainImage ( out vec4 fragColor, in vec2 fragCoord) {
+    vec2 uv = fragCoord/iResolution.xy;
+    
+    fragColor = vec4( vec3(SmoothNoise2(uv*4.+iTime*2.,3)), 1.0 );
+}
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diff --git a/2D/water/sand.jpg b/2D/water/sand.jpg
new file mode 100644
index 0000000..29ad90e
Binary files /dev/null and b/2D/water/sand.jpg differ
diff --git a/2D/water/sand2.jpg b/2D/water/sand2.jpg
new file mode 100644
index 0000000..e72f034
Binary files /dev/null and b/2D/water/sand2.jpg differ
diff --git a/2D/water/water.glsl b/2D/water/water.glsl
new file mode 100644
index 0000000..a9c9017
--- /dev/null
+++ b/2D/water/water.glsl
@@ -0,0 +1,52 @@
+#iChannel0::WrapMode "Repeat"
+#iChannel0 "file://./sand2.jpg"
+
+float N21(vec2 p) {
+    //return fract( sin(p.x*100.0+p.y*6574.0)*5647.0 );
+    p = fract(p*vec2(233.32, 851.73));
+    p += dot(p, p+23.45);
+    return fract(p.x*p.y);
+}
+
+float SmoothNoise(vec2 uv) {
+    vec2 lv = fract(uv);
+    vec2 id = floor(uv);
+
+    lv = smoothstep(0.0,1.0, lv); // = lv*lv*(3.-2.*lv);
+
+    float bl = N21(id);
+    float br = N21(id+vec2(1.0, 0.0));
+    float b = mix(bl, br, lv.x);
+
+    float tl = N21(id+vec2(0.0,1.0));
+    float tr = N21(id+vec2(1.0,1.0));
+    float t = mix(tl, tr, lv.x);
+
+    return mix(b,t, lv.y);
+}
+
+float SmoothNoise2(vec2 uv, int ocataves) {
+    float c = 0.0; 
+    float norm = 0.0; 
+    float limit = pow(2.0, float(ocataves));
+    for(float i=1.0; i<=limit; i*=2.0){
+        float norm_fract = 1.0/i;
+        c += SmoothNoise(uv*i)*norm_fract;
+        norm+= norm_fract;
+    }
+
+    return c/norm;
+}
+
+void mainImage ( out vec4 fragColor, in vec2 fragCoord) {
+    vec2 uv = (fragCoord-0.5*iResolution.xy)/iResolution.y;
+    
+    uv = uv*4.;
+
+    float tmp;
+    float b = SmoothNoise2(uv+iTime*0.5,2)*0.5+SmoothNoise2(uv-iTime*0.2,2)*0.5;
+    tmp = smoothstep(0.5, 0.505, b);
+    b = tmp - smoothstep(0.505, 0.51, b);
+
+    fragColor = vec4( texture(iChannel0, uv+ SmoothNoise2(uv+iTime*0.5,2)*0.4 ).xyz+b, 1.0 );
+}
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