cleanup and some tiny experiments

2 files changed, 59 insertions, 5 deletions

diff --git a/shaders/shader.frag b/shaders/shader.frag
index 7c5b0e7..7566a89 100644
--- a/shaders/shader.frag
+++ b/shaders/shader.frag
@@ -4,6 +4,52 @@ layout(location = 0) in vec3 fragColor;
 
 layout(location = 0) out vec4 outColor;
 
+vec4 mainImage();
+
 void main() {
-    outColor = vec4(fragColor, 1.0);
+    if(mod (gl_FragCoord.x,3.0)  < 1 && mod(gl_FragCoord.y,2.0) > 1)
+        outColor = vec4(1,1,1,1.0);
+    else
+        outColor = mainImage(); //vec4(fragColor, 1.0);
+
+}
+
+
+// https://www.shadertoy.com/view/WdsGzM
+
+#define PI 3.14159265359
+
+vec2 rotate2d(vec2 uv,float _angle){return mat2(cos(_angle),-sin(_angle),sin(_angle),cos(_angle)) * uv;}
+vec2 scale2d(vec2 uv,float _scale){return  uv * mat2(_scale,0.0,0.0,_scale);}
+
+float random (vec2 st) {
+    return fract(sin(dot(st.xy,vec2(20.,100.)))*10000.);
+}
+
+vec4 mainImage()
+{
+    vec2 fragCoord;
+    fragCoord.x=gl_FragCoord.x;
+    fragCoord.y=gl_FragCoord.y;
+    int iTime = 0;
+    vec2 iResolution = vec2(800,600);
+
+    ///
+    vec2 uv = fragCoord/iResolution.xy;
+    uv.x *= iResolution.x / iResolution.y;
+    uv=rotate2d(uv,1.+fract(iTime*0.02)*2.*PI);
+    uv*=5.+0.4*sin(iTime/2.);
+
+
+    vec2 pos = vec2(0.5)-fract(uv);
+    pos=rotate2d(pos,fract(iTime*0.4+random(floor(uv)))*2.*PI);
+    pos=scale2d(pos,0.5+sin(random(uv+fract(iTime)*2.*PI)));
+
+
+    float r = length(pos)*2.0;
+    float a = atan(pos.y,pos.x);
+	float f = smoothstep(-.0,1., cos(a*max(3.,floor(abs(uv.x))*floor(abs(uv.y)))))*0.3+0.5;
+    vec3 color = vec3( 1.-smoothstep(f,f+0.02,r) );
+    return vec4(color*vec3(0.1,0.5*random(floor(uv)),0.8+0.1*sin(2.*PI*fract(iTime*0.3))),1.0);
+
 }
diff --git a/shaders/shader.vert b/shaders/shader.vert
index f5b2f8d..e8c6a28 100644
--- a/shaders/shader.vert
+++ b/shaders/shader.vert
@@ -2,16 +2,24 @@
 
 layout(location = 0) out vec3 fragColor;
 
-vec2 positions[3] = vec2[](
+vec2 positions[6] = vec2[](
     vec2(0.0, -0.5),
     vec2(0.5, 0.5),
-    vec2(-0.5, 0.5)
+    vec2(-0.5, 0.5),
+
+    vec2(0, -1),
+    vec2(1, -1),
+    vec2(1, 1)
 );
 
-vec3 colors[3] = vec3[](
+vec3 colors[6] = vec3[](
     vec3(1.0, 0.0, 0.0),
     vec3(0.0, 1.0, 0.0),
-    vec3(0.0, 0.0, 1.0)
+    vec3(0.0, 0.0, 1.0),
+
+    vec3(0.0, 1.0, 1.0),
+    vec3(0.0, 1.0, 1.0),
+    vec3(0.0, 1.0, 1.0)
 );
 
 void main() {