blocks/polygons/shimmering.yaml at gh-pages · tangrams/blocks · GitHub

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import:
    - ../tiling/simplex.yaml
    - ../generative/noise.yaml
    - ../space/constant.yaml

styles:
    polygons-shimmering:
        doc:
            author:
                name: Patricio Gonzalez Vivo
                twitter: patriciogv
            version: 0.0.1
            tangram-version: 0.0.7
            licence: MIT
            description: |
                Apply a shimmering radom pattern of simplex grid triangles to the polygon style. To learn more about noise and simplex grid check [this chapter from the Book of Shaders](https://thebookofshaders.com/11/)
        ui:
            shaders:
                defines:
                    SHIMMERING_SCALE:
                        type: number
                        label: Scale
                        range:
                            min: 1.
                            max: 1000.
                            step: 1.
                    SHIMMERING_SPEED:
                        type: number
                        label: Speed
                        range:
                            min: 0.
                            max: 1.
                            step: 0.01
                    SHIMMERING_AMOUNT:
                        type: number
                        label: Amount
                        range:
                            min: 0.
                            max: 1.
                            step: 0.01
                    SHIMMERING_COLOR:
                        type: color
                        label: Color
                    SHIMMERING_BACKGROUND_COLOR:
                        type: color
                        label: 'Background color'
                    SHIMMERING_ANIMATED:
                        type: boolean
                        label: Animate

        base: polygons
        mix: [tiling-simplex, generative-noise, space-constant]
        animated: true
        shaders:
            defines:
                SHIMMERING_SCALE: 10.
                SHIMMERING_COLOR: color.rgb
                SHIMMERING_BACKGROUND_COLOR: color.rgb*.5
                SHIMMERING_SPEED: 0.1
                SHIMMERING_AMOUNT: 1.
                SHIMMERING_ANIMATED: true
            blocks:
                color: |
                    vec2 st = getConstantCoords()*SHIMMERING_SCALE;
                    vec2 s = skew(st);
                    vec2 s_f = fract(s);
                    #ifdef SHIMMERING_ANIMATED
                    float n = snoise(vec3(floor(s+step(s_f.x,s_f.y)*5.),u_time*SHIMMERING_SPEED));
                    #else
                    float n = snoise(floor(s+step(s_f.x,s_f.y)*5.));
                    #endif
                    color.rgb = mix(SHIMMERING_COLOR,
                                    mix(SHIMMERING_BACKGROUND_COLOR,SHIMMERING_COLOR,n),
                                    SHIMMERING_AMOUNT);