From 1d789e63e8004eaa4755d549c316ba5df32eef58 Mon Sep 17 00:00:00 2001
From: Christoph Helma <helma@in-silico.ch>
Date: Sat, 3 Mar 2018 20:46:17 +0100
Subject: v1

---
 img         |   7 ++++++
 shader.frag |  72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 sv.c        |   8 +++----
 vns.png     | Bin 0 -> 12268 bytes
 4 files changed, 77 insertions(+), 10 deletions(-)
 create mode 100644 img
 create mode 100644 vns.png

diff --git a/img b/img
new file mode 100644
index 0000000..5952e2c
--- /dev/null
+++ b/img
@@ -0,0 +1,7 @@
+/home/ch/images/art/20130113_164429.JPG
+vns.png
+/home/ch/images/art/20171202_151804.JPG
+/home/ch/images/art/20171202_151612.JPG
+/home/ch/images/art/20130113_164510.JPG
+/home/ch/images/art/20171014_092615.JPG
+/home/ch/images/art/20171202_151645.JPG
diff --git a/shader.frag b/shader.frag
index f76c968..eda981e 100644
--- a/shader.frag
+++ b/shader.frag
@@ -47,29 +47,89 @@ void main (void) {
   vec4 img; 
   vec2 coord;
   if (program == 0) {
-    //coord = zoom(st(),0.5*(1.0-params[0]));
-    coord = zoom(st(),sin(time));
+    coord = zoom(st(),0.5-0.5*(1.0-params[0]));
     img = texture2D(images[0],coord);
     img -= params[1]*(1.0-texture2D(images[1],st()));
   }
   else if (program == 1) {
+    coord = translate(coord,vec2(0.5,0.5));
+    coord = zoom(coord,2.5);
+    coord = translate(coord,vec2(-0.5,-0.5));
+    //coord = zoom(st(),0.5);
+    //coord = zoom(coord,2.1*(1.0-0.5*params[0]));
+    //coord = zoom(st(),0.5-0.5*(1.0-params[0]));
+    //coord = zoom(st(),(1.0-1.5*params[2]));
+    //coord = translate(coord,vec2(0,params[0]));
+    img = texture2D(images[0],coord);
+    coord = zoom(st(),0.5-0.5*(1.0-params[0]));
+    vec3 i2 = texture2D(images[2],coord).rgb;
+    //img.rgb = pow((1.0-2.0*i2),img.rgb+0.6);
+    img.rgb = pow(img.rgb,1.0-i2);
+  }
+  else if (program == 2) {
+    coord = zoom(st(),(1.0-1.5*params[2]));
+    img = texture2D(images[3],coord);
+    coord = zoom(st(),0.5*(1.0-0.5*params[0]));
+    coord = translate(coord,vec2(0.2,0.15));
+    vec3 i2 = texture2D(images[2],coord).rgb;
+    img.rgb = pow((1.0-2.0*i2),params[3]*5*img.rgb);
+    /*
     coord = zoom(st(),(1.0-1.5*params[0]));
     img = texture2D(images[3],coord);
     coord = zoom(st(),0.5*(1.0-0.5*params[2]));
+    coord += 0.5;
+    coord *= rotate2d(params[3]-0.5);
+    coord -= 0.5;
     vec3 i2 = texture2D(images[2],coord).rgb;
     img.rgb = pow(img.rgb,5*i2);
+  */
   }
-  else if (program == 2) {
+  else if (program == 3) {
+    coord = st() + 0.5;
+    coord -= 0.5;
+    img = texture2D(images[3],coord);
+    coord = zoom(st(),0.5*(1.0-0.5*params[0]));
+    //coord = translate(coord,vec2(0.2,0.15));
+    //coord = rotate2d(1.0-1.5*params[2])*coord;
+    coord = rotate2d(sin(ticks))*coord;
+    vec3 i2 = texture2D(images[2],coord).rgb;
+    img.rgb = pow((1.0-2.0*i2),params[3]*5*img.rgb);
+    /*
+  */
+  }
+  else if (program == 4) {
     coord = zoom(st(),(1.0-1.5*params[0]));
+    coord = rotate2d(ticks)*coord;
+    coord = translate(coord,vec2(0.5,0.5));
     img = texture2D(images[3],coord);
     coord = zoom(st(),0.5*(1.0-0.5*params[2]));
-    coord *= rotate2d(ticks); 
+    coord = translate(coord,vec2(0.2,0.15));
+    coord = rotate2d(1.0-1.5*params[2])*coord;
+    //coord += 0.5;
+    //coord *= rotate2d(params[3]-0.5);
+    //coord -= 0.5;
     vec3 i2 = texture2D(images[2],coord).rgb;
+    img.rgb = pow(img.rgb,i2);
+  }
+  else if (program == 5) {
+    coord = zoom(st(),(1.0-1.5*params[0]));
+    coord = rotate2d(ticks)*coord;
+    coord = translate(coord,vec2(0.5,0.5));
+    img = texture2D(images[2],coord);
+    coord = zoom(st(),0.5*(1.0-0.5*params[2]));
+    //coord = translate(coord,vec2(0.2,0.15));
+    coord = rotate2d(1.0-1.5*params[2])*coord;
+    //coord += 0.5;
+    //coord *= rotate2d(params[3]-0.5);
+    //coord -= 0.5;
+    vec3 i2 = texture2D(images[3],coord).rgb;
     img.rgb = pow(img.rgb,5*i2);
   }
-  vec4 feedback = imageLoad(backbuffer,ist());
-  img = mix(img,feedback,0.5);
   imageStore(backbuffer,ist(),img);
+  if (program != 0) {
+    vec4 feedback = imageLoad(backbuffer,ist());
+    img = mix(feedback,img,0.5);
+  }
   fragColor = img;
   /*
   fragColor = vec4(params[1]);
diff --git a/sv.c b/sv.c
index ec554e5..11b6b0c 100644
--- a/sv.c
+++ b/sv.c
@@ -175,10 +175,10 @@ void readImage(int i) {
   glBindTexture(GL_TEXTURE_2D,images[i].id);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
-  //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
-  //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
+  //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
+  //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
   //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
   //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
diff --git a/vns.png b/vns.png
new file mode 100644
index 0000000..3b998d9
Binary files /dev/null and b/vns.png differ
-- 
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