From 0004cddea65315ec5f39b89f942a2aa13b62e425 Mon Sep 17 00:00:00 2001
From: bvanroll <beppe.vanrolleghem@gmail.com>
Date: Sat, 1 Jun 2024 14:44:18 +0200
Subject: [PATCH] hmmm

---
 experiments/holo/holo.frag            | 38 ++++---------------
 experiments/holo/holo_old.frag        | 54 +++++++++++++++++++++++++++
 learning/PixelSpirit/hierophant.frag  |  9 +++++
 learning/PixelSpirit/hope.frag        | 47 +++++++++++++++++++++++
 learning/PixelSpirit/intuition.frag   | 46 +++++++++++++++++++++++
 learning/PixelSpirit/merge.frag       | 47 +++++++++++++++++++++++
 learning/PixelSpirit/the_diamond.frag | 49 ++++++++++++++++++++++++
 learning/PixelSpirit/the_hermit.frag  | 50 +++++++++++++++++++++++++
 learning/PixelSpirit/the_summit.frag  | 49 ++++++++++++++++++++++++
 learning/PixelSpirit/the_temple.frag  | 42 +++++++++++++++++++++
 learning/PixelSpirit/the_tower.frag   | 47 +++++++++++++++++++++++
 11 files changed, 447 insertions(+), 31 deletions(-)
 create mode 100644 experiments/holo/holo_old.frag
 create mode 100644 learning/PixelSpirit/hope.frag
 create mode 100644 learning/PixelSpirit/intuition.frag
 create mode 100644 learning/PixelSpirit/merge.frag
 create mode 100644 learning/PixelSpirit/the_diamond.frag
 create mode 100644 learning/PixelSpirit/the_hermit.frag
 create mode 100644 learning/PixelSpirit/the_summit.frag
 create mode 100644 learning/PixelSpirit/the_temple.frag
 create mode 100644 learning/PixelSpirit/the_tower.frag

diff --git a/experiments/holo/holo.frag b/experiments/holo/holo.frag
index f4a1f0c..bf53929 100644
--- a/experiments/holo/holo.frag
+++ b/experiments/holo/holo.frag
@@ -7,47 +7,23 @@ uniform float u_time;
 
 #define PI 3.14159265359
 
-const vec3 uAColor = vec3(.5);
-const vec3 uBColor = vec3(.5);
-const vec3 uCColor = vec3(1.);
-const vec3 uDColor = vec3(.3,.2,.2);
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
 
 //get colors from http://dev.thi.ng/gradients/
 vec3 cosPalette(float t) {
   return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
 }
 
-float circleSDF(vec2 st) {
-  return length(st-.5)*2.;
-}
-
-float fill(float x, float size) {
-  return 1.-step(size, x);
-}
 
 void main() {
   vec2 st = gl_FragCoord.xy/u_resolution;
-  float col = 0.0;
-  vec2 l = vec2(.5,.5)-(u_mouse/u_resolution);
-  l = l*.1;
+  vec3 color = vec3(0.0,0.0,0.0);
   float alpha = 1.0;
-  float dots = 17.;
-  float dotsize = .7;
-  vec2 off = vec2(.1,.1);
-  float movemod = sin(u_time)/2.+1.;
-  for (int i = 0; i < 4; i++) {
-    vec2 off1 = off * vec2(-1,1);
-    vec2 off2 = off * vec2(1,-1);
-    vec2 off3 = off * vec2(1,1);
-    vec2 off4 = off * vec2(-1,-1);
-    col += fill(circleSDF(fract(st*dots)+off1+l+movemod),dotsize)/4.;
-    col += fill(circleSDF(fract(st*dots)+off2+l),dotsize)/4.;
-    col += fill(circleSDF(fract(st*dots)+off3+l),dotsize)/4.;
-    col += fill(circleSDF(fract(st*dots)+off4+l),dotsize)/4.;
-    //col += fill(circleSDF(fract(st*dots + l*.9+off)*.3), dotsize);
-    off += vec2(.1,.1);
-  }
-  vec3 color = cosPalette(col);
+
+  
 
   gl_FragColor = vec4(color, alpha);
 }
diff --git a/experiments/holo/holo_old.frag b/experiments/holo/holo_old.frag
new file mode 100644
index 0000000..cfb4b18
--- /dev/null
+++ b/experiments/holo/holo_old.frag
@@ -0,0 +1,54 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5);
+const vec3 uBColor = vec3(.5);
+const vec3 uCColor = vec3(1.);
+const vec3 uDColor = vec3(.3,.2,.2);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+float circleSDF(vec2 st) {
+  return length(st-.5)*2.;
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  float col = 0.0;
+  vec2 l = vec2(.5,.5)-(u_mouse/u_resolution);
+  l = l*.1;
+  float alpha = 1.0;
+  float dots = 1.;
+  float dotsize = .7;
+  vec2 off = vec2(.1,.1);
+  float movemod = sin(u_time)/2.+1.;
+  col += fill(circleSDF(fract(st*dots)+l+movemod),dotsize)/4.;
+  for (int i = 0; i < 4; i++) {
+    vec2 off1 = off * vec2(-1,1);
+    vec2 off2 = off * vec2(1,-1);
+    vec2 off3 = off * vec2(1,1);
+    vec2 off4 = off * vec2(-1,-1);
+    col += fill(circleSDF(fract(st*dots)+off1+l+movemod),dotsize)/4.;
+    col += fill(circleSDF(fract(st*dots)+off2+l),dotsize)/4.;
+    col += fill(circleSDF(fract(st*dots)+off3+l),dotsize)/4.;
+    col += fill(circleSDF(fract(st*dots)+off4+l),dotsize)/4.;
+    //col += fill(circleSDF(fract(st*dots + l*.9+off)*.3), dotsize);
+    off += vec2(.1,.1);
+  }
+  vec3 color = cosPalette(col);
+
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/hierophant.frag b/learning/PixelSpirit/hierophant.frag
index 4045a89..c17eda7 100644
--- a/learning/PixelSpirit/hierophant.frag
+++ b/learning/PixelSpirit/hierophant.frag
@@ -31,6 +31,11 @@ float fill(float x, float size) {
   return 1.-step(size, x);
 }
 
+float stroke(in float x_coor, float s, float width){
+  float d = step(s,x_coor+width*.5)-step(s,x_coor-width*.5);
+  return clamp(d, 0.,1.);
+}
+
 void main() {
   vec2 st = gl_FragCoord.xy/u_resolution;
   vec3 color = vec3(0.0,0.0,0.0);
@@ -41,6 +46,10 @@ void main() {
   //i don't understand what happens here
   //it has to be fract causing this to look like that
   color *= step(.5,fract(cross*4.));
+  color *= step(1.,cross);
+  color += fill(cross,.5);
+  color += stroke(rect,.65,.05);
+  color += stroke(rect,.75,.025);
   
   gl_FragColor = vec4(color, alpha);
 }
diff --git a/learning/PixelSpirit/hope.frag b/learning/PixelSpirit/hope.frag
new file mode 100644
index 0000000..9d6bee7
--- /dev/null
+++ b/learning/PixelSpirit/hope.frag
@@ -0,0 +1,47 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+float circleSDF(vec2 st) {
+  return length(st-.5)*2.;
+}
+
+float vesicaSDF(vec2 st, float w) {
+  vec2 offset = vec2(w*.5,.0);
+  return max(circleSDF(st-offset), circleSDF(st+offset));
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+
+float flip(float v, float pct) {
+  return mix(v, 1.-v, pct);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  float ves = fill(vesicaSDF(st, .5),.8);
+  float lower = step((st.x+st.y)/2.,.5);
+  color += flip(ves, lower);
+  
+
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/intuition.frag b/learning/PixelSpirit/intuition.frag
new file mode 100644
index 0000000..ff20c52
--- /dev/null
+++ b/learning/PixelSpirit/intuition.frag
@@ -0,0 +1,46 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+vec2 rotate(vec2 st, float a) {
+  st = mat2(cos(a),-sin(a),sin(a),cos(a))*(st-.5);
+  return st+.5;
+}
+
+float triSDF(vec2 st) {
+  st = (st*2.-1.)*2.;
+  return max(abs(st.x)*.866025+st.y*.5,-st.y*.5);
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+
+  st = rotate(st, radians(-25.));
+  float sdf = triSDF(st);
+  //why does dividing the triangle with a larger triangle create a smaller black triangle area at the bottom?
+  sdf /= triSDF(st+vec2(.0,.2));
+  color += sdf; //fill(abs(sdf),.56);
+
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/merge.frag b/learning/PixelSpirit/merge.frag
new file mode 100644
index 0000000..bd3474a
--- /dev/null
+++ b/learning/PixelSpirit/merge.frag
@@ -0,0 +1,47 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+float circleSDF(vec2 st) {
+  return length(st-.5)*2.;
+}
+float flip(float v, float pct) {
+  return mix(v, 1.-v, pct);
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+
+float stroke(in float x_coor, float s, float width){
+  float d = step(s,x_coor+width*.5)-step(s,x_coor-width*.5);
+  return clamp(d, 0.,1.);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  vec2 off = vec2(.15,0);
+  float right = fill(circleSDF(st-off),.525);  
+  float left = stroke(circleSDF(st+off),.5,.05);
+  color += flip(right, left);
+  
+
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/the_diamond.frag b/learning/PixelSpirit/the_diamond.frag
new file mode 100644
index 0000000..bf85d9e
--- /dev/null
+++ b/learning/PixelSpirit/the_diamond.frag
@@ -0,0 +1,49 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+//starting to refactor these so i can use them as individual snippets without dependencies
+float rhombSDF(vec2 st) {
+  vec2 st1 = (st*2.-1.)*2.;
+  vec2 st2 = (vec2(st.x,1.-st.y)*2.-1.)*2.;
+  float triangle1 = max(abs(st1.x)*.866025+st1.y*.5,-st1.y*.5);
+  float triangle2 = max(abs(st2.x)*.866025+st2.y*.5,-st2.y*.5);
+  return max(triangle1, triangle2);
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+
+float stroke(in float x_coor, float s, float width){
+  float d = step(s,x_coor+width*.5)-step(s,x_coor-width*.5);
+  return clamp(d, 0.,1.);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  float sdf = rhombSDF(st);
+  color += fill(sdf,.425);
+  color += stroke(sdf, .5,.05);
+  color += stroke(sdf, .6,.05);
+  
+
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/the_hermit.frag b/learning/PixelSpirit/the_hermit.frag
new file mode 100644
index 0000000..78e2b57
--- /dev/null
+++ b/learning/PixelSpirit/the_hermit.frag
@@ -0,0 +1,50 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+float triSDF(vec2 st) {
+  st = (st*2.-1.)*2.;
+  return max(abs(st.x)*.866025+st.y*.5,-st.y*.5);
+}
+
+float rhombSDF(vec2 st) {
+  vec2 st1 = (st*2.-1.)*2.;
+  vec2 st2 = (vec2(st.x,1.-st.y)*2.-1.)*2.;
+  float triangle1 = max(abs(st1.x)*.866025+st1.y*.5,-st1.y*.5);
+  float triangle2 = max(abs(st2.x)*.866025+st2.y*.5,-st2.y*.5);
+  return max(triangle1, triangle2);
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+
+float flip(float v, float pct) {
+  return mix(v, 1.-v, pct);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+
+  float tri = fill(triSDF(st),.5);
+  float rhomb = fill(rhombSDF(st),.4);
+  color += flip(rhomb,tri);
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/the_summit.frag b/learning/PixelSpirit/the_summit.frag
new file mode 100644
index 0000000..7b20d5a
--- /dev/null
+++ b/learning/PixelSpirit/the_summit.frag
@@ -0,0 +1,49 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+float circleSDF(vec2 st) {
+  return length(st-.5)*2.;
+}
+float triSDF(vec2 st) {
+  st = (st*2.-1.)*2.;
+  return max(abs(st.x)*.866025+st.y*.5,-st.y*.5);
+}
+float stroke(in float x_coor, float s, float width){
+  float d = step(s,x_coor+width*.5)-step(s,x_coor-width*.5);
+  return clamp(d, 0.,1.);
+}
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  float circle = circleSDF(st-vec2(.0,.1));
+  float triangle = triSDF(st+vec2(.0,.1));
+  color += stroke(circle,.45,.1);
+  //good way to disable colors in a space. since mult 1. gives the og value but mult .0 sets to 0
+  color *= step(.55,triangle);
+  color += fill(triangle,.45);
+
+  
+
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/the_temple.frag b/learning/PixelSpirit/the_temple.frag
new file mode 100644
index 0000000..425d60c
--- /dev/null
+++ b/learning/PixelSpirit/the_temple.frag
@@ -0,0 +1,42 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+//wtf even
+float triSDF(vec2 st) {
+  st = (st*2.-1.)*2.;
+  return max(abs(st.x)*.866025+st.y*.5,-st.y*.5);
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  st.y = 1.-st.y;
+  vec2 ts = vec2(st.x,.82-st.y);
+  color += fill(triSDF(st), .7);
+  color -= fill(triSDF(ts), .36);
+
+
+  
+
+  gl_FragColor = vec4(color, alpha);
+}
diff --git a/learning/PixelSpirit/the_tower.frag b/learning/PixelSpirit/the_tower.frag
new file mode 100644
index 0000000..d913a8d
--- /dev/null
+++ b/learning/PixelSpirit/the_tower.frag
@@ -0,0 +1,47 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+#define PI 3.14159265359
+
+const vec3 uAColor = vec3(.5,.5,.5);
+const vec3 uBColor = vec3(.5,.5,.5);
+const vec3 uCColor = vec3(1.,1.,1.);
+const vec3 uDColor = vec3(.0,.33,.67);
+
+//get colors from http://dev.thi.ng/gradients/
+vec3 cosPalette(float t) {
+  return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
+}
+
+float flip(float v, float pct) {
+  return mix(v, 1.-v, pct);
+}
+
+float fill(float x, float size) {
+  return 1.-step(size, x);
+}
+float stroke(in float x_coor, float s, float width){
+  float d = step(s,x_coor+width*.5)-step(s,x_coor-width*.5);
+  return clamp(d, 0.,1.);
+}
+
+float rectSDF(vec2 st, vec2 s) {
+  st = st*2.-1.;
+  return max(abs(st.x/s.x),abs(st.y/s.y));
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution;
+  vec3 color = vec3(0.0,0.0,0.0);
+  float alpha = 1.0;
+  float rect = rectSDF(st, vec2(.5,1.));
+  float diag = (st.x+st.y)*.5;
+  color += flip(fill(rect,.6),stroke(diag,.5,.01));
+  
+
+  gl_FragColor = vec4(color, alpha);
+}