//! Shows how to do clipping.

use geo::polygon;
use geo_clipper::Clipper;
use geo_types::Polygon;
use polygon_art::Context;

fn main() {
    // two polygons
    let polygon_a: Polygon<f64> = polygon![
    ( x : 40.,  y : 34. ),
    ( x : 200., y : 66. ),
    ( x : 106., y : 80. ),
    ( x : 120., y : 175. ),
        ];

    let polygon_b: Polygon<f64> = polygon![
    ( x: 133., y :  120.),
    ( x: 80.,  y : 146.),
    ( x: 26.,  y : 106.),
    ( x: 40.,  y : 90.),
    ( x: 0.,   y :  53.),
    ( x: 80.,  y : 66.),
    ( x: 146., y :  0.),
            ];

    let context = Context::create();

    // input polygons
    context.translate(2.0, 100.);
    context.draw_polygon(&polygon_a);
    context.draw_polygon(&polygon_b);

    // union
    context.translate(250.0, 0.);
    let union = &polygon_a.union(&polygon_b, 10.0);
    context.draw_multipolgon(union);

    // intersection
    context.translate(0.0, 250.);
    let intersection = &polygon_a.intersection(&polygon_b, 10.0);
    context.draw_multipolgon(intersection);
    context.restore();

    // difference A
    context.translate(250.0, 0.);
    let difference = &polygon_a.difference(&polygon_b, 10.0);
    context.draw_multipolgon(difference);

    // difference B
    context.translate(0., 250.);
    let difference = &polygon_b.difference(&polygon_a, 10.0);
    context.draw_multipolgon(difference);
    context.restore();

    context.render();
}