OpenNest/OpenNest.Core/Shapes/TShape.cs

using OpenNest.Geometry;
using System.Collections.Generic;

namespace OpenNest.Shapes
{
    public class TShape : ShapeDefinition
    {
        public double Width { get; set; }
        public double Height { get; set; }
        public double StemWidth { get; set; }
        public double BarHeight { get; set; }

        public override string GenerateName() => $"T {Dim(Width)}x{Dim(Height)}";

        public override void SetPreviewDefaults()
        {
            Width = 10;
            Height = 8;
            StemWidth = 3;
            BarHeight = 3;
        }

        public override Drawing GetDrawing()
        {
            var sw = StemWidth > 0 ? StemWidth : Width / 3.0;
            var bh = BarHeight > 0 ? BarHeight : Height / 3.0;
            var stemLeft = (Width - sw) / 2.0;
            var stemRight = stemLeft + sw;
            var stemTop = Height - bh;

            var entities = new List<Entity>
            {
                new Line(stemLeft, 0, stemRight, 0),
                new Line(stemRight, 0, stemRight, stemTop),
                new Line(stemRight, stemTop, Width, stemTop),
                new Line(Width, stemTop, Width, Height),
                new Line(Width, Height, 0, Height),
                new Line(0, Height, 0, stemTop),
                new Line(0, stemTop, stemLeft, stemTop),
                new Line(stemLeft, stemTop, stemLeft, 0)
            };

            return CreateDrawing(entities);
        }
    }
}