file_id.diz
// 2D plasma in C64 graphics style
//
// Version 1.0 (2013-03-31)
// Simon Stelling-de San Antonio
// #version 130
uniform float iTime;
void main()
{
float camtime = 1.23*iTime;
vec2 iResolution = vec2(1280, 720);
vec4 fragCoord = gl_FragCoord;
vec2 p = fragCoord.xy / iResolution.xy;
p.y = 1.0 - p.y;
p *= 200.0;
p.x *= (iResolution.x / iResolution.y);
p.x /= 2.0;
p = floor(p);
p.x *= 2.0;
float a = p.x+30.0*sin(p.x/21.0 + 0.3*sin(0.4*camtime))+20.0*cos(p.y/19.0 + 0.2*cos(0.6*camtime))-160.0;
float b = p.y+30.0*cos(p.y/18.0 + 0.4*sin(0.7*camtime))+20.0*sin(p.x/16.0 + 0.5*cos(0.7*camtime))- 97.0;
float e = floor((length(vec2(a,b))
+4.0*mod(floor((p.x+p.y+p.y)/2.0),2.0))/13.0);
float c;
if (e == 0.0) { c = 9.0;
} else if (e == 1.0) { c = 2.0;
} else if (e == 2.0) { c = 8.0;
} else if (e == 3.0) { c = 10.0;
} else if (e == 4.0) { c = 15.0;
} else if (e == 5.0) { c = 7.0;
} else if (e == 6.0) { c = 1.0;
} else if (e == 7.0) { c = 13.0;
} else if (e == 8.0) { c = 3.0;
} else if (e == 9.0) { c = 14.0;
} else if (e == 10.0) { c = 4.0;
} else if (e == 11.0) { c = 6.0;
} else if (e == 12.0) { c = 0.0;
} else if (e == 13.0) { c = 11.0;
} else if (e == 14.0) { c = 5.0;
} else { c = 12.0;
}
vec3 col;
if (c == 0.0) { col = vec3(0.0);
} else if (c == 1.0) { col = vec3(0.0);
} else if (c == 2.0) { col = vec3(137.0, 64.0, 54.0)/256.0;
} else if (c == 3.0) { col = vec3(122.0, 191.0, 199.0)/256.0;
} else if (c == 4.0) { col = vec3(138.0, 70.0, 174.0)/256.0;
} else if (c == 5.0) { col = vec3(104.0, 169.0, 65.0)/256.0;
} else if (c == 6.0) { col = vec3( 62.0, 49.0, 162.0)/256.0;
} else if (c == 7.0) { col = vec3(208.0, 220.0, 113.0)/256.0;
} else if (c == 8.0) { col = vec3(144.0, 95.0, 37.0)/256.0;
} else if (c == 9.0) { col = vec3( 92.0, 71.0, 0.0)/256.0;
} else if (c == 10.0) { col = vec3(187.0, 119.0, 109.0)/256.0;
} else if (c == 11.0) { col = vec3( 85.0, 85.0, 85.0)/256.0;
} else if (c == 12.0) { col = vec3(128.0, 128.0, 128.0)/256.0;
} else if (c == 13.0) { col = vec3(172.0, 234.0, 136.0)/256.0;
} else if (c == 14.0) { col = vec3(124.0, 112.0, 218.0)/256.0;
} else { col = vec3(171.0, 171.0, 171.0)/256.0;
}
gl_FragColor = vec4(col,1.0);
}
// #version 130
uniform float iTime;
uniform float iSize;
// Variables
vec4 final_col = vec4(0.0); // <-- Fixed according to the suggestion by user inferno
// Color palette arrays
// Not sure how accurate they are but whatever, looks enough C64'ish to me
vec4 PALETTE_RED[4];
vec4 PALETTE_GREEN[4];
vec4 PALETTE_BLUE[4];
void buildPalette()
{
// Red color palette
PALETTE_RED[0] = vec4( 0.533, 0.223, 0.196, 1.0);
PALETTE_RED[1] = vec4( 0.721, 0.411, 0.384, 1.0);
PALETTE_RED[2] = vec4( 0.749, 0.807, 0.447, 1.0);
PALETTE_RED[3] = vec4( 1.000, 1.000, 1.000, 1.0);
// Green color palette
PALETTE_GREEN[0] = vec4( 0.333, 0.627, 0.286, 1.0);
PALETTE_GREEN[1] = vec4( 0.580, 0.878, 0.537, 1.0);
PALETTE_GREEN[2] = vec4( 0.749, 0.807, 0.447, 1.0);
PALETTE_GREEN[3] = vec4( 1.000, 1.000, 1.000, 1.0);
// Blue color palette
PALETTE_BLUE[0] = vec4( 0.250, 0.192, 0.552, 1.0);
PALETTE_BLUE[1] = vec4( 0.470, 0.411, 0.768, 1.0);
PALETTE_BLUE[2] = vec4( 0.403, 0.713, 0.741, 1.0);
PALETTE_BLUE[3] = vec4( 0.000, 0.000, 0.000, 1.0);
}
vec4 rasterline(in vec2 xy, in int axis, in vec4 line_color, in float raster_size, in float line_pos, in float line_offset)
{
float line_pos_final = line_pos + (line_offset);
float line_pos_max = line_pos_final + raster_size;
float line_pos_min = line_pos_final - raster_size;
if (axis == 0 && xy.x < line_pos_max && xy.x > line_pos_min)
{
return line_color;
}
if (axis == 1 && xy.y < line_pos_max && xy.y > line_pos_min)
{
return line_color;
}
return vec4(0.0);
}
void rasterbar(in vec2 xy, in int axis, in vec4 palette_0[4], in vec4 palette_1[4], in float bar_pos, in float size_0)
{
// Lol, I'm new to GLSL so I just dealt with my lack of knowledge and hardcoded this...
// This kinda loses it's point if I do it this way though. :( Maybe I'll figure this out later...
final_col += rasterline(xy, axis, palette_0[0], 0.015 * size_0, bar_pos, 0.2300 * size_0);
final_col += rasterline(xy, axis, palette_0[1], 0.005 * size_0, bar_pos, 0.2100 * size_0);
final_col += rasterline(xy, axis, palette_0[0], 0.005 * size_0, bar_pos, 0.2000 * size_0);
final_col += rasterline(xy, axis, palette_0[1], 0.015 * size_0, bar_pos, 0.1800 * size_0);
final_col += rasterline(xy, axis, palette_0[0], 0.005 * size_0, bar_pos, 0.1600 * size_0);
final_col += rasterline(xy, axis, palette_0[1], 0.015 * size_0, bar_pos, 0.1400 * size_0);
final_col += rasterline(xy, axis, palette_0[2], 0.005 * size_0, bar_pos, 0.1200 * size_0);
final_col += rasterline(xy, axis, palette_0[1], 0.005 * size_0, bar_pos, 0.1100 * size_0);
final_col += rasterline(xy, axis, palette_0[2], 0.015 * size_0, bar_pos, 0.0900 * size_0);
final_col += rasterline(xy, axis, palette_0[3], 0.005 * size_0, bar_pos, 0.0700 * size_0);
final_col += rasterline(xy, axis, palette_0[2], 0.005 * size_0, bar_pos, 0.0600 * size_0);
final_col += rasterline(xy, axis, palette_0[3], 0.005 * size_0, bar_pos, 0.0500 * size_0);
final_col += rasterline(xy, axis, palette_0[2], 0.005 * size_0, bar_pos, 0.0400 * size_0);
final_col += rasterline(xy, axis, palette_0[3], 0.020 * size_0, bar_pos, 0.0200 * size_0);
final_col += rasterline(xy, axis, palette_1[0], 0.015 * size_0, bar_pos, -0.2300 * size_0);
final_col += rasterline(xy, axis, palette_1[1], 0.005 * size_0, bar_pos, -0.2100 * size_0);
final_col += rasterline(xy, axis, palette_1[0], 0.005 * size_0, bar_pos, -0.2000 * size_0);
final_col += rasterline(xy, axis, palette_1[1], 0.015 * size_0, bar_pos, -0.1800 * size_0);
final_col += rasterline(xy, axis, palette_1[0], 0.005 * size_0, bar_pos, -0.1600 * size_0);
final_col += rasterline(xy, axis, palette_1[1], 0.015 * size_0, bar_pos, -0.1400 * size_0);
final_col += rasterline(xy, axis, palette_1[2], 0.005 * size_0, bar_pos, -0.1200 * size_0);
final_col += rasterline(xy, axis, palette_1[1], 0.005 * size_0, bar_pos, -0.1100 * size_0);
final_col += rasterline(xy, axis, palette_1[2], 0.015 * size_0, bar_pos, -0.0900 * size_0);
final_col += rasterline(xy, axis, palette_1[3], 0.005 * size_0, bar_pos, -0.0700 * size_0);
final_col += rasterline(xy, axis, palette_1[2], 0.005 * size_0, bar_pos, -0.0600 * size_0);
final_col += rasterline(xy, axis, palette_1[3], 0.005 * size_0, bar_pos, -0.0500 * size_0);
final_col += rasterline(xy, axis, palette_1[2], 0.005 * size_0, bar_pos, -0.0400 * size_0);
final_col += rasterline(xy, axis, palette_1[3], 0.020 * size_0, bar_pos, -0.0200 * size_0);
}
void main()
{
vec2 iResolution = vec2(1280, 720);
vec4 fragCoord = gl_FragCoord;
buildPalette();
float aspectRatio = iResolution.x / iResolution.y;
vec2 xy_norm;
xy_norm.x = (fragCoord.x / iResolution.x) * aspectRatio;
xy_norm.y = fragCoord.y / iResolution.y;
vec2 xy_final = -1.0 + 2.0 * xy_norm;
float mid = -0.15;
float bar_1_pos = 0.1 * cos(xy_final.x + iTime * 5.0);
float bar_2_pos = 0.1 * sin(xy_final.y + iTime * 2.5) - 0.625;
float bar_3_pos = 0.1 * cos((xy_final.y * 2.5) + iTime * 5.0) + 2.25;
float bar_4_pos = 0.1 * cos(iTime * 5.0) + 1.75;
float bar_5_pos = 0.25 * cos((xy_final.x * 2.0) + iTime * 2.5) + 1.125;
rasterbar(xy_final, 1, PALETTE_RED, PALETTE_BLUE, bar_1_pos, iSize);
gl_FragColor = final_col;
}
// #version 140
void main()
{
gl_Position = gl_ProjectionMatrix * gl_ModelViewMatrix * gl_Vertex;
gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
gl_FrontColor = gl_Color;
}/*
* MIT License
* Copyright © Etienne 'Eethe' Orlhac
* 07/08/2015
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the “Software”),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software
* is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* The Software is provided “as is”, without warranty of any kind,
* express or implied, including but not limited to the warranties of merchantability,
* fitness for a particular purpose and noninfringement. In no event shall the authors
* or copyright holders be liable for any claim, damages or other liability, whether in an
* action of contract, tort or otherwise, arising from, out of or in connection with
* the software or the use or other dealings in the Software.
*/
#define AMPLITUDE 0.0085
#define SPEED 0.01
uniform float iTime;
uniform sampler2D iChannel0;
uniform sampler2D iChannel1;
vec4 rgbShift( in vec2 p , in vec4 shift) {
shift *= 2.0*shift.w - 1.0;
vec2 rs = vec2(shift.x,-shift.y);
vec2 gs = vec2(shift.y,-shift.z);
vec2 bs = vec2(shift.z,-shift.x);
float r = texture2D(iChannel0, p+rs, 0.0).x;
float g = texture2D(iChannel0, p+gs, 0.0).y;
float b = texture2D(iChannel0, p+bs, 0.0).z;
return vec4(r,g,b,1.0);
}
vec4 noise( in vec2 p ) {
return texture2D(iChannel1, p, 0.0);
}
vec4 vec4pow( in vec4 v, in float p ) {
// Don't touch alpha (w), we use it to choose the direction of the shift
// and we don't want it to go in one direction more often than the other
return vec4(pow(v.x,p),pow(v.y,p),pow(v.z,p),v.w);
}
void main()
{
vec2 iResolution = vec2(1280.0, 720.0);
vec4 fragCoord = gl_FragCoord;
vec2 p = fragCoord.xy / iResolution.xy;
vec4 c = vec4(0.0,0.0,0.0,1.0);
// Elevating shift values to some high power (between 8 and 16 looks good)
// helps make the stuttering look more sudden
vec4 shift = vec4pow(noise(vec2(SPEED*iTime,2.0*SPEED*iTime/25.0 )),8.0)
*vec4(AMPLITUDE,AMPLITUDE,AMPLITUDE,1.0);;
c += rgbShift(p, shift);
gl_FragColor = c;
}// change these values to 0.0 to turn off individual effects
float vertJerkOpt = 1.0;
float vertMovementOpt = 2.0;
float bottomStaticOpt = 5.0;
float scalinesOpt = 1.0;
float rgbOffsetOpt = 1.0;
float horzFuzzOpt = 1.0;
uniform float iTime;
uniform sampler2D iChannel0;
// uniform float bottomStaticOpt;
// Noise generation functions borrowed from:
// https://github.com/ashima/webgl-noise/blob/master/src/noise2D.glsl
vec3 mod289(vec3 x) {
return x - floor(x * (1.0 / 289.0)) * 289.0;
}
vec2 mod289(vec2 x) {
return x - floor(x * (1.0 / 289.0)) * 289.0;
}
vec3 permute(vec3 x) {
return mod289(((x*34.0)+1.0)*x);
}
float snoise(vec2 v)
{
const vec4 C = vec4(0.211324865405187, // (3.0-sqrt(3.0))/6.0
0.366025403784439, // 0.5*(sqrt(3.0)-1.0)
-0.577350269189626, // -1.0 + 2.0 * C.x
0.024390243902439); // 1.0 / 41.0
// First corner
vec2 i = floor(v + dot(v, C.yy) );
vec2 x0 = v - i + dot(i, C.xx);
// Other corners
vec2 i1;
//i1.x = step( x0.y, x0.x ); // x0.x > x0.y ? 1.0 : 0.0
//i1.y = 1.0 - i1.x;
i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);
// x0 = x0 - 0.0 + 0.0 * C.xx ;
// x1 = x0 - i1 + 1.0 * C.xx ;
// x2 = x0 - 1.0 + 2.0 * C.xx ;
vec4 x12 = x0.xyxy + C.xxzz;
x12.xy -= i1;
// Permutations
i = mod289(i); // Avoid truncation effects in permutation
vec3 p = permute( permute( i.y + vec3(0.0, i1.y, 1.0 ))
+ i.x + vec3(0.0, i1.x, 1.0 ));
vec3 m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0);
m = m*m ;
m = m*m ;
// Gradients: 41 points uniformly over a line, mapped onto a diamond.
// The ring size 17*17 = 289 is close to a multiple of 41 (41*7 = 287)
vec3 x = 2.0 * fract(p * C.www) - 1.0;
vec3 h = abs(x) - 0.5;
vec3 ox = floor(x + 0.5);
vec3 a0 = x - ox;
// Normalise gradients implicitly by scaling m
// Approximation of: m *= inversesqrt( a0*a0 + h*h );
m *= 1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h );
// Compute final noise value at P
vec3 g;
g.x = a0.x * x0.x + h.x * x0.y;
g.yz = a0.yz * x12.xz + h.yz * x12.yw;
return 130.0 * dot(m, g);
}
float staticV(vec2 uv) {
float staticHeight = snoise(vec2(9.0,iTime*1.2+3.0))*0.3+5.0;
float staticAmount = snoise(vec2(1.0,iTime*1.2-6.0))*0.1+0.3;
float staticStrength = snoise(vec2(-9.75,iTime*0.6-3.0))*2.0+2.0;
return (1.0-step(snoise(vec2(5.0*pow(iTime,2.0)+pow(uv.x*7.0,1.2),pow((mod(iTime,100.0)+100.0)*uv.y*0.3+3.0,staticHeight))),staticAmount))*staticStrength;
}
void main()
{
vec2 iResolution = vec2(1280, 720);
vec2 uv = gl_FragCoord.xy/iResolution.xy;
float jerkOffset = (1.0-step(snoise(vec2(iTime*1.3,5.0)),0.8))*0.05;
float fuzzOffset = snoise(vec2(iTime*15.0,uv.y*80.0))*0.003;
float largeFuzzOffset = snoise(vec2(iTime*1.0,uv.y*25.0))*0.004;
float vertMovementOn = (1.0-step(snoise(vec2(iTime*0.2,8.0)),0.4))*vertMovementOpt;
float vertJerk = (1.0-step(snoise(vec2(iTime*1.5,5.0)),0.6))*vertJerkOpt;
float vertJerk2 = (1.0-step(snoise(vec2(iTime*5.5,5.0)),0.2))*vertJerkOpt;
float yOffset = abs(sin(iTime)*4.0)*vertMovementOn+vertJerk*vertJerk2*0.3;
float y = mod(uv.y+yOffset,1.0);
float xOffset = (fuzzOffset + largeFuzzOffset) * horzFuzzOpt;
float staticVal = 0.0;
for (float y = -1.0; y <= 1.0; y += 1.0) {
float maxDist = 5.0/200.0;
float dist = y/200.0;
staticVal += staticV(vec2(uv.x,uv.y+dist))*(maxDist-abs(dist))*1.5;
}
staticVal *= bottomStaticOpt;
float red = texture2D( iChannel0, vec2(uv.x + xOffset -0.01*rgbOffsetOpt,y)).r+staticVal;
float green = texture2D( iChannel0, vec2(uv.x + xOffset, y)).g+staticVal;
float blue = texture2D( iChannel0, vec2(uv.x + xOffset +0.01*rgbOffsetOpt,y)).b+staticVal;
vec3 color = vec3(red,green,blue);
float scanline = sin(uv.y*800.0)*0.04*scalinesOpt;
color -= scanline;
gl_FragColor = vec4(color,1.0);
}
