132 lines
3.7 KiB
C#
132 lines
3.7 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Runtime.Serialization;
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namespace Shapes
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{
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[DataContract(Name = "Triangle", Namespace = "Shapes")]
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public class Triangle : GeometricShape
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{
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[DataMember]
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public sealed override List<Point> Points { get; protected set; }
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[DataMember]
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public override Color Fill { get; set; }
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[DataMember]
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public override Color Stroke { get; set; }
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[DataMember]
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public sealed override Point CenterPoint { get; protected set; }
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[DataMember]
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public List<Line> Lines { get; internal set; }
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internal IFileIO _fileWriter;
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public Triangle(Point point1, Point point2, Point point3)
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{
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Stroke = Color.Black;
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Points = new List<Point>();
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Lines = new List<Line>();
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Points.Add(point1);
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Points.Add(point2);
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Points.Add(point3);
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Lines.Add(new Line(point1, point2));
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Lines.Add(new Line(point2, point3));
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Lines.Add(new Line(point3, point1));
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ComputeCenter();
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}
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public Triangle(double x1, double y1, double x2, double y2, double x3, double y3)
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{
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Stroke = Color.Black;
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var point1 = new Point(x1, y1);
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var point2 = new Point(x2, y2);
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var point3 = new Point(x3, y3);
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Points = new List<Point>();
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Lines = new List<Line>();
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Points.Add(point1);
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Points.Add(point2);
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Points.Add(point3);
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Lines.Add(new Line(point1, point2));
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Lines.Add(new Line(point2, point3));
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Lines.Add(new Line(point3, point1));
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ComputeCenter();
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}
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public override double ComputeArea()
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{
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var a = Lines[0].ComputeLength();
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var b = Lines[1].ComputeLength();
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var c = Lines[2].ComputeLength();
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var p = (a + b + c) / 2;
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return Math.Sqrt(p * (p - a) * (p - b) * (p - c));
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}
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public override void Scale(double scaleFactor)
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{
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Validator.ValidatePositiveDouble(scaleFactor, "Invalid scale factor");
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foreach (var point in Points)
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{
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point.X *= scaleFactor;
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point.Y *= scaleFactor;
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}
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}
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public override void Save(Stream stream)
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{
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_fileWriter.SaveShape(stream, this);
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}
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[ExcludeFromCodeCoverage]
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public override void Draw(Stream stream)
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{
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var tmp = new Bitmap((int) Lines.Max(x => x.ComputeLength()) * 2, (int) Lines.Max(x => x.ComputeLength()) * 2);
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var blackPen = new Pen(Stroke, 3);
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// Draw line to screen.
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using (var graphics = Graphics.FromImage(tmp))
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{
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for (var i = 1; i < Points.Count; i++)
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graphics.DrawLine(blackPen,
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(float) Points[i - 1].X,
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(float) Points[i - 1].Y,
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(float) Points[i].X,
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(float) Points[i].Y);
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}
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tmp.Save(stream, ImageFormat.Jpeg);
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}
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internal override void ComputeCenter()
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{
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var x = (Points[0].X + Points[1].X + Points[2].X) * 0.33333333333;
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var y = (Points[0].Y + Points[1].Y + Points[2].Y) * 0.33333333333;
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CenterPoint = new Point(x, y);
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}
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}
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} |