Document the --version option

Merge pull request 'Hide visible scrolling in background staticNoise' (#768 ) from aaronkollasch/random-static-noise into master
Reviewed-on: #768
2024-10-11 11:02:46 +02:00 · 2024-10-11 10:57:00 +02:00 · 2024-10-11 10:56:16 +02:00
1 changed files with 16 additions and 1 deletions
--- a/app/qml/ShaderTerminal.qml
+++ b/app/qml/ShaderTerminal.qml
@ -247,6 +247,17 @@ Item {
             "  return outColor;
             }" +

+             //pseudo-random vector
+             //https://stackoverflow.com/a/10625698
+             "float random( vec2 p )
+             {
+                 vec2 K1 = vec2(
+                     23.14069263277926, // e^pi (Gelfond's constant)
+                     2.665144142690225 // 2^sqrt(2) (Gelfond-Schneider constant)
+                 );
+                 return fract( cos( dot(p,K1) ) * 12345.6789 );
+             }" +
+
             "void main() {" +
                 "vec2 cc = vec2(0.5) - qt_TexCoord0;" +
                 "float distance = length(cc);" +
@ -285,7 +296,11 @@ Item {
                 : "") +

                 (jitter !== 0 || staticNoise !== 0 ?
-                     "vec4 noiseTexel = texture2D(noiseSource, scaleNoiseSize * coords + vec2(fract(time / 51.0), fract(time / 237.0)));"
+                 "vec4 noiseTexel = texture2D(
+                     noiseSource, scaleNoiseSize * coords
+                     + vec2(0.0, random(vec2(fract(time / 237.0), 822.9582)))
+                     + vec2(fract(time / 31.0), fract(time / 177.0))
+                 );"
                 : "") +

                 (jitter !== 0 ? "
Author	SHA1	Message	Date
Nick Hanley	27b248d851	Document the --version option	2024-10-11 11:02:46 +02:00
Sebastiaan de Schaetzen	e3c2e024bb	Merge pull request 'Hide visible scrolling in background staticNoise' (#768 ) from aaronkollasch/random-static-noise into master Reviewed-on: #768	2024-10-11 10:57:00 +02:00
Aaron Kollasch	b69610d7f3	Hide visible scrolling in static noise Randomize vertical position of staticNoise texel and add to existing scrolling of noise texture (both horizontal and vertical; faster in vertical direction)	2024-10-11 10:56:16 +02:00