Shader - SparkSL

Spark AR
, , , ,
#1

Hi everyone, I am writing because I don’t know how to pass this problem…Do any of you happen to know how I can convert this code so that it can work for SparkAr? (from GLSL :arrow_right: SparkSL)

This below is the GLSL code taken from shadertoy:

// -------------------------------------------------------------------------------------------------

#define ImageTex iChannel0

#define Res  iResolution.xy
#define Res0 vec2(textureSize(iChannel0,0))
#define Res1 vec2(textureSize(iChannel1,0))
#define Res2 vec2(textureSize(iChannel2,0))
#define Res3 vec2(textureSize(iChannel3,0))

float getVal(vec2 uv)
{
    return length(textureLod(ImageTex,uv,.5+.5*log2(Res.x/1920.)).xyz)*1.;
}
    
vec2 getGrad(vec2 uv,float delta)
{
    vec2 d=vec2(delta,0);
    return vec2(
        getVal(uv+d.xy)-getVal(uv-d.xy),
        getVal(uv+d.yx)-getVal(uv-d.yx)
    )/delta;
}

float PaintSpec = .15;

float Vignette = 1.5;

void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
	vec2 uv = fragCoord/Res;
    vec3 n = vec3(getGrad(uv,1.0/iResolution.y),150.0);
    //n *= n;
    n=normalize(n);
    fragColor=vec4(n,1);
    vec3 light = normalize(vec3(-1,1,1.4));
    float diff=clamp(dot(n,light),0.,1.0);
    float spec=clamp(dot(reflect(light,n),vec3(0,0,-1)),0.0,1.0);
    spec=pow(spec,12.0)*PaintSpec;
    float sh=clamp(dot(reflect(light*vec3(-1,-1,1),n),vec3(0,0,-1)),0.0,1.0);
    sh=pow(sh,4.0)*.1;
	fragColor = texture(ImageTex,uv)*mix(diff,1.,.9)+spec*vec4(.85,1.,1.15,1.)+sh*vec4(.85,1.,1.15,1.);
	fragColor.w=1.;
    vec2 uv2 = (fragCoord-.5*Res)*min(Res2.y/Res.y,Res2.x/Res.x)/Res2+.5;
    vec4 col0 = texture(iChannel2,uv2);
    
    if(true)
    {
        vec2 scc=(fragCoord-.5*iResolution.xy)/iResolution.x;
        float vign = 1.1-Vignette*dot(scc,scc);
        vign*=1.-.7*Vignette*exp(-sin(fragCoord.x/iResolution.x*3.1416)*40.);
        vign*=1.-.7*Vignette*exp(-sin(fragCoord.y/iResolution.y*3.1416)*20.);
        fragColor.xyz *= vign;
    }
}

// -------------------------------------------------------------------------------------------------

Thanks in case anyone can find an answer!

#2

@modelsbymike3d has a tutorial for you!

1 Like