stripes.yaml

import:
    - ../polygons/diagonal-stripes.yaml

styles:
    elevation-stripes:
        doc:
            author: 
                name: Patricio Gonzalez Vivo
                twitter: patriciogv
            version: 0.0.1
            tangram-version: 0.0.7
            licence: MIT
            description: |
                Perfect for the `landuse` layer on your elevation maps, the `elevation-stripe` modules use the color of the layer to draw a stripe pattern that changes width based on the surface of the terrain.
            examples:
                stripes:
                    url: https://tangrams.github.io/tangram-sandbox/styles/elevation-stripes.yaml
                    img: https://tangrams.github.io/tangram-sandbox/styles/elevation-stripes.png
        base: polygons
        mix: [polygons-diagonal-stripes]
        blend: inlay
        lighting: false
        raster: custom
        shaders: 
            defines:
                STRIPES_ALPHA: .5
                STRIPES_SCALE: 20.
                STRIPES_PCT: 1.8
                NORMAL_TEXTURE_INDEX: 0
                STRIPES_DIR: vec3(-0.600,-0.420,0.600)
                STRIPES_WIDTH: dot((sampleRaster(int(NORMAL_TEXTURE_INDEX)).rgb-.5)*2.,
                                    STRIPES_DIR)*STRIPES_PCT