X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fblitblur.fs;h=8de9e67b7ac269a9f9f8ad434cf574f43f8da983;hb=be5e25dee2c54c2a22ca3bbb5bbe0eb6149343be;hp=3a7b1fcd5daf36efb4684188841b45f001f25548;hpb=a1adba47558099cab82aa6d10abdc1dca11d3342;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/blitblur.fs b/shaders/blitblur.fs
index 3a7b1fc..8de9e67 100644
--- a/shaders/blitblur.fs
+++ b/shaders/blitblur.fs
@@ -2,28 +2,45 @@ out vec4 FragColor;
 uniform sampler2D uTexMain;
 uniform sampler2D uTexMotion;
 uniform float uBlurStrength;
+uniform vec2 uOverrideDir;
+uniform float uTime;
+uniform float uGlitchStrength;
+uniform vec2 uClampUv;
 
 in vec2 aUv;
 
-vec2 rand_hash22( vec2 p )
-{
+vec2 rand_hash22( vec2 p ){
    vec3 p3 = fract(vec3(p.xyx) * 213.8976123);
    p3 += dot(p3, p3.yzx+19.19);
    return fract(vec2((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y));
 }
 
-void main()
-{
-   vec2 vcenter = (aUv-vec2(0.5))*vec2(2.0);
-   vec2 vrand = rand_hash22( aUv ) * 2.0 - vec2(1.0);
+const int NOISE_LOOP = 3;
+vec3 digital_noise( uvec3 iuv ){
+   iuv *=uvec3(8,2524,7552);
+   for( int i=0; i<NOISE_LOOP; i++ )
+      iuv += (iuv.yzx<<2) ^ (iuv.yxz)+iuv.z;
+   return vec3(iuv)*(1.0/float(0xffffffffU));
+}
+
+void main(){
+   vec2 vuv = aUv; 
+
+   //if( uGlitchStrength > 0.0 ){
+   //   uvec3 p = uvec3( gl_FragCoord.xy, uint(uTime*30.0) );
+   //   vec2 g = digital_noise(p).xy;
+   //   vuv = aUv + g.xy*uGlitchStrength - uGlitchStrength*0.5;
+   //}
+
+   vec2 vrand = rand_hash22( vuv ) * 2.0 - vec2(1.0);
    vec2 vrand1 = rand_hash22( vrand ) * 2.0 - vec2(1.0);
    
-   vec2 vdir = texture( uTexMotion, aUv ).xy * uBlurStrength;
+   vec2 vdir = texture( uTexMotion, vuv ).xy * uBlurStrength + uOverrideDir;
 
-   vec4 vcolour0 = texture( uTexMain, aUv + vdir*vrand.x );
-   vec4 vcolour1 = texture( uTexMain, aUv + vdir*vrand.y );
-   vec4 vcolour2 = texture( uTexMain, aUv + vdir*vrand1.x );
-   vec4 vcolour3 = texture( uTexMain, aUv + vdir*vrand1.y );
+   vec4 vcolour0 = texture( uTexMain, min(vuv + vdir*vrand.x,uClampUv) );
+   vec4 vcolour1 = texture( uTexMain, min(vuv + vdir*vrand.y,uClampUv) );
+   vec4 vcolour2 = texture( uTexMain, min(vuv + vdir*vrand1.x,uClampUv) );
+   vec4 vcolour3 = texture( uTexMain, min(vuv + vdir*vrand1.y,uClampUv) );
 
    FragColor = ( vcolour0 + vcolour1 + vcolour2 + vcolour3 ) * 0.25;
 }