init

shaders/shader.frag

@@ -0,0 +1,72 @@
+#version 450
+
+layout(location=0)out vec4 fragColor;
+
+vec3 logo(vec2 u,float time){
+    mat2 x=mat2(cos(time),sin(time),-sin(time),cos(time));
+    mat2 y=mat2(sin(time),cos(time),-cos(time),sin(time));
+    float l=length(u);
+    
+    if(l<.17){
+        return vec3(1.);
+    }else if(l<.22){
+        u=x*u;
+        if(abs(u.y)<.02){
+            return vec3(1.);
+            
+        }else{
+            return vec3(.82,.0,.1);
+        }
+    }else if(l<.25){
+        return vec3(1.);
+    }else if(l<.4){
+        u=y*u;
+        if(l>.32){
+            float a=fract((atan(u.y,u.x)/(atan(-1.)*4.)+.5)*3.);
+            if((l>.37)&&(a>.85-(l*2.)&&a<.15+(l*2.))){
+                return vec3(1.);
+            }else if(a>.275-l/2.&&a<.725+l/2.){
+                return vec3(1.);
+            }
+        }
+        if(abs(u.y)<.02){
+            return vec3(1.);
+        }else if(u.y<0.){
+            return vec3(.35,.32,.32);
+        }else{
+            return vec3(.12);
+        }
+    }else if(l<.44){
+        return vec3(1.);
+    }else if(l<.5){
+        return vec3(.12);
+    }
+    
+    //flashy colours
+    return vec3((sin(u.y+time*2.)+1.)/2.,(sin(u.x+time*3.)+1.)/2.,(sin(u.y+time*5.)+1.)/2.);
+}
+
+void main(){
+    vec2 iResolution=vec2(1920.,1080.);
+    float iTime=0;
+    // Normalized pixel coordinates (from -0.5 to 0.5 vertically, -AR to AR horizontally)
+    vec2 uv=gl_FragCoord.xy/iResolution.y;
+    uv.x-=iResolution.x/iResolution.y/2.;
+    uv.y-=.5;
+    
+    // Antialias
+    float low=1./iResolution.y/2.;;
+    vec3 o=vec3(low,-low,0.);
+    vec3 col=(logo(uv+o.xx,iTime)
+    +logo(uv+o.xy,iTime)
+    +logo(uv+o.yx,iTime)
+    +logo(uv+o.yy,iTime)
+    +logo(uv+o.yz,iTime)
+    +logo(uv+o.zy,iTime)
+    +logo(uv+o.zz,iTime)
+    +logo(uv+o.zx,iTime)
+    +logo(uv+o.xz,iTime))/9.;
+    
+    // Output to screen
+    fragColor=vec4(col,1.);
+}

shaders/shader.vert

@@ -0,0 +1,11 @@
+#version 450
+
+vec2 positions[3]=vec2[](
+    vec2(-1.,-1.),
+    vec2(3.,-1.),
+    vec2(-1.,3.)
+);
+
+void main(){
+    gl_Position=vec4(positions[gl_VertexIndex],0.,1.);
+}