LYGIA Shader Library

hueShift (lygia/color/hueShift)

Shifts color hue

Dependencies:

Use:

hueShift(<vec3|vec4> color, <float> angle)

Check it on Github



#ifndef FNC_HUESHIFT
#define FNC_HUESHIFT
vec3 hueShift( vec3 color, float a){
    vec3 hsl = rgb2hsl(color);
#ifndef HUESHIFT_AMOUNT
    hsl.r = hsl.r * TAU + a;
    hsl.r = fract(hsl.r / TAU);
#else
    hsl.r += a;
#endif
    return hsl2rgb(hsl);
}

vec4 hueShift(in vec4 v, in float a) {
    return vec4(hueShift(v.rgb, a), v.a);
}
#endif

Dependencies:

Use:

hueShift(<float3|float4> color, <float> angle)

Check it on Github



#ifndef FNC_HUESHIFT
#define FNC_HUESHIFT
float3 hueShift( float3 color, float a){
    float3 hsl = rgb2hsl(color);
#ifndef HUESHIFT_AMOUNT
    hsl.r = hsl.r * TAU + a;
    hsl.r = frac(hsl.r / TAU);
#else
    hsl.r += a;
#endif
    return hsl2rgb(hsl);
}

float4 hueShift(in float4 v, in float a) { return float4(hueShift(v.rgb, a), v.a);}
#endif

Dependencies:

Use:

hueShift(<float3|float4> color, <float> angle)

Check it on Github



#ifndef FNC_HUESHIFT
#define FNC_HUESHIFT
float3 hueShift( float3 color, float a){
    float3 hsl = rgb2hsl(color);
#ifndef HUESHIFT_AMOUNT
    hsl.r = hsl.r * TAU + a;
    hsl.r = fract(hsl.r / TAU);
#else
    hsl.r += a;
#endif
    return hsl2rgb(hsl);
}

float4 hueShift(float4 v, float a) {
    return float4(hueShift(v.rgb, a), v.a);
}
#endif

Dependencies:

Use:

<vec3f> hueShift(<vec3f> color, <float> angle)

Check it on Github



fn hueShift(color: vec3f, a: f32 ) -> vec3f{
    var hsl = rgb2hsl(color);
    hsl.r = hsl.r * TAU + a;
    hsl.r = fract(hsl.r / TAU);
    return hsl2rgb(hsl);
}

Licenses

LYGIA is dual-licensed under the Prosperity License and the Patron License for sponsors and contributors.

Sponsors and contributors are automatically added to the Patron License and they can ignore the any non-commercial rule of the Prosperity Licensed software (please take a look to the exception).

It's also possible to get a permanent comercial license hook to a single and specific version of LYGIA.

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