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zyzz1995

A really awesome edge glow effect on ShaderToy

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I just found really awesome edge glow effect on ShaderToy, here is the link I don't know if the LE have some similar effect or if it possible to port it to LE. I know nothing about shader, so maybe this is a stupid question. I think i should spend some time on learning it though some of my friends told me that it was very difficult.

 

EDIT: the link is repaired now. Sorry for the broken link before. And below is the shader code.

 

// shader input
uniform vec3     iResolution;         // viewport resolution (in pixels)
uniform float     iGlobalTime;         // shader playback time (in seconds)
uniform float     iTimeDelta;         // render time (in seconds)
uniform int     iFrame;             // shader playback frame
uniform float     iChannelTime[4];     // channel playback time (in seconds)
uniform vec3     iChannelResolution[4]; // channel resolution (in pixels)
uniform vec4     iMouse;             // mouse pixel coords. xy: current (if MLB down), zw: click
uniform samplerXX iChannel0..3;         // input channel. XX = 2D/Cube
uniform vec4     iDate;                 // (year, month, day, time in seconds)
uniform float     iSampleRate;         // sound sample rate (i.e., 44100)
float d;
float lookup(vec2 p, float dx, float dy)
{
vec2 uv = (p.xy + vec2(dx * d, dy * d)) / iResolution.xy;
vec4 c = texture(iChannel0, uv.xy);

// return as luma
return 0.2126*c.r + 0.7152*c.g + 0.0722*c.b;
}
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
d = sin(iGlobalTime * 5.0)*0.5 + 1.5; // kernel offset
vec2 p = fragCoord.xy;

// simple sobel edge detection
float gx = 0.0;
gx += -1.0 * lookup(p, -1.0, -1.0);
gx += -2.0 * lookup(p, -1.0, 0.0);
gx += -1.0 * lookup(p, -1.0, 1.0);
gx += 1.0 * lookup(p, 1.0, -1.0);
gx += 2.0 * lookup(p, 1.0, 0.0);
gx += 1.0 * lookup(p, 1.0, 1.0);

float gy = 0.0;
gy += -1.0 * lookup(p, -1.0, -1.0);
gy += -2.0 * lookup(p, 0.0, -1.0);
gy += -1.0 * lookup(p, 1.0, -1.0);
gy += 1.0 * lookup(p, -1.0, 1.0);
gy += 2.0 * lookup(p, 0.0, 1.0);
gy += 1.0 * lookup(p, 1.0, 1.0);

// hack: use g^2 to conceal noise in the video
float g = gx*gx + gy*gy;
float g2 = g * (sin(iGlobalTime) / 2.0 + 0.5);

vec4 col = texture(iChannel0, p / iResolution.xy);
col += vec4(0.0, g, g2, 1.0);

fragColor = col;
}

 

Found a Leadwerks version of the abvoe shader, but can't get it working

 

#version 400
uniform sampler2D texture1;
uniform bool isbackbuffer;
uniform vec2 buffersize;
uniform float currenttime;
out vec4 fragData0;
#define time currenttime * 0.05
float d = sin(time * 5.0)*0.5 + 1.5; // kernel offset
float lookup(vec2 p, float dx, float dy)
{
   vec2 uv = (p.xy + vec2(dx * d, dy * d)) / buffersize.xy;
   vec4 c = texture(texture1, uv.xy);

 // return as luma
   return 0.2126*c.r + 0.7152*c.g + 0.0722*c.b;
}
void main(void)
{
vec2 icoord = vec2(gl_FragCoord.xy/buffersize);
if (isbackbuffer) icoord.y = 1.0 - icoord.y;
   vec2 p = gl_FragCoord.xy/buffersize;
if (isbackbuffer) p.y = 1.0 - p.y;
p*=buffersize;

 // simple sobel edge detection
   float gx = 0.0;
   gx += -1.0 * lookup(p, -1.0, -1.0);
   gx += -2.0 * lookup(p, -1.0,  0.0);
   gx += -1.0 * lookup(p, -1.0,  1.0);
   gx +=  1.0 * lookup(p,  1.0, -1.0);
   gx +=  2.0 * lookup(p,  1.0,  0.0);
   gx +=  1.0 * lookup(p,  1.0,  1.0);

   float gy = 0.0;
   gy += -1.0 * lookup(p, -1.0, -1.0);
   gy += -2.0 * lookup(p,  0.0, -1.0);
   gy += -1.0 * lookup(p,  1.0, -1.0);
   gy +=  1.0 * lookup(p, -1.0,  1.0);
   gy +=  2.0 * lookup(p,  0.0,  1.0);
   gy +=  1.0 * lookup(p,  1.0,  1.0);

   //hack: use g^2 to conceal noise in the video
   float g = gx*gx + gy*gy;
   float g2 = g * (sin(time) / 2.0 + 0.5);

   vec4 col = texture(texture1, p / buffersize.xy);
   col += vec4(0.0, g, g2, 1.0);

   fragData0 = col;
}

Edited by zyzz1995
Link to post

Your link doesn't work for me.

 

There is an edge shader in the archive

 

There is a glow shader in this thread.

 

Sorry for the link, it is ok now. I will check what you posted later.Anyway thanks for help.

Link to post

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