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some tweaks to vhs rewind

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hunterk 2018-01-10 20:58:09 -06:00
parent a627142fbf
commit fe395a86ce
1 changed files with 7 additions and 5 deletions
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12
vhs/shaders/rewind.glsl
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@ -111,27 +111,29 @@ void main()
vec4 texColor = COMPAT_TEXTURE(Source, vTexCoord);
if (float(FrameDirection) < 0.0)
{
texColor = COMPAT_TEXTURE(Source, jumpy(vTexCoord, iTime));
vec2 uv = vTexCoord.xy;
uv.x -= sin(0.0006 * mod(iTime, 11.0)) * cos(mod(iTime, 17.0) * -uv.y);
texColor = COMPAT_TEXTURE(Source, jumpy(uv, iTime));
// get position to sample
vec2 samplePosition = vTexCoord.xy * TextureSize.xy / InputSize.xy - vec2(0.0, 0.45);
vec2 samplePosition = uv.xy * TextureSize.xy / InputSize.xy - vec2(0.0, 0.45);
float whiteNoise;
// Jitter each line left and right
samplePosition.x = samplePosition.x+(rand(vec2(iTime,vTexCoord.y))-0.5)/64.0;
samplePosition.x += (rand(vec2(iTime,vTexCoord.y))+0.5);
// Jitter the whole picture up and down
samplePosition.y = samplePosition.y+(rand(vec2(iTime))-0.5)/32.0;
// Slightly add color noise to each line
texColor = texColor + (vec4(-0.5)+vec4(rand(vec2(vTexCoord.y,iTime)),rand(vec2(vTexCoord.y,iTime+1.0)),rand(vec2(vTexCoord.y,iTime+2.0)),0))*0.1;
// Either sample the texture, or just make the pixel white (to get the staticy-bit at the bottom)
whiteNoise = rand(vec2(floor(samplePosition.y*160.0),floor(samplePosition.x*190.0))+vec2(iTime,0));
whiteNoise = rand(vec2(floor(samplePosition.y*160.0),floor(samplePosition.x*cos(iTime)))+vec2(iTime,0.));
if ((whiteNoise > 11.5-30.0*samplePosition.y || whiteNoise < 1.5-5.0*samplePosition.y) &&
(whiteNoise > 11.5-30.0*(samplePosition.y + 0.5) || whiteNoise < 1.5-5.0*(samplePosition.y + 0.4))) {
// Sample the texture.
samplePosition.y = 1.0-samplePosition.y; //Fix for upside-down texture
} else {
// Use white. (I'm adding here so the color noise still applies)
texColor = vec4(1.0,1.0,1.0,1.0);
texColor += vec4(0.5 + rand(samplePosition));
}
vec4 rew_osd = COMPAT_TEXTURE(rew, jumpy(vTexCoord * TextureSize / InputSize, iTime));
rew_osd.a = ((mod(iTime, 100.0) < 50.0)) ? rew_osd.a : 0.0;