stripes.yaml

import:
    - ../space/tile.yaml
    - ../patterns/stripes.yaml

styles:
    polygons-stripes:
        doc:
            author: 
                name: Patricio Gonzalez Vivo
                twitter: patriciogv
            version: 0.0.1
            tangram-version: 0.0.7
            licence: MIT
            description: |  
                Apply stripe pattern to the polygon style. To learn more about patterns check [this chapter from the Book of Shaders](https://thebookofshaders.com/09/)
        ui:
            shaders:
                defines:
                    STRIPES_SCALE:
                        type: number
                        label: Scale
                        range: 
                            min: 1.
                            max: 1000.
                            step: 1.
                    STRIPES_WIDTH:
                        type: number
                        label: Width
                        range: 
                            min: 0.
                            max: 1.
                            step: 0.01
                    STRIPES_ALPHA:
                        type: number
                        label: Amount
                        range: 
                            min: 0.
                            max: 1.
                            step: 0.01
                    STRIPES_ANGLE:
                        type: number
                        label: Angle (radiants)
                        range: 
                            min: 0.
                            max: 3.1415
                            step: 0.1
        base: polygons
        mix: [patterns-stripes, space-tile]
        shaders:
            defines:
                STRIPES_WIDTH: .5
                STRIPES_ALPHA: .5
                STRIPES_SCALE: 2.
                STRIPES_ANGLE: PI*0.25
            blocks:
                color: |
                    color.a = stripes(  getTileCoords()*STRIPES_SCALE, 
                                        STRIPES_WIDTH, 
                                        STRIPES_ANGLE)*STRIPES_ALPHA;