palette.yaml

styles:
    color-palette:
        doc:
            author: 
                name: Inigo Quiles
                twitter: iquilezles
            version: 0.0.1
            tangram-version: 0.0.7
            licence: MIT
            description: |
                Procedural generation of color palettes implemented by [Inigo Quiles](https://twitter.com/iquilezles) (1999) explained in [this article](http://www.iquilezles.org/www/articles/palettes/palettes.htm)
        shaders:
            blocks:
                global: |
                    vec3 palette (float t, vec3 a, vec3 b, vec3 c, vec3 d) {
                        return a + b*cos( 6.28318*(c*t+d) );
                    }