54 lines
1.5 KiB
C#
54 lines
1.5 KiB
C#
using System;
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using System.Runtime.Serialization;
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namespace Shapes
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{
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[DataContract]
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[KnownType(typeof(Circle))]
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[KnownType(typeof(Rectangle))]
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[KnownType(typeof(Triangle))]
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public abstract class GeometricShape : Shape
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{
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[DataMember]
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public abstract Point CenterPoint { get; protected set; }
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internal abstract void ComputeCenter();
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public void Rotate(double degrees)
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{
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var radians = degrees * (Math.PI / 180);
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var cosTheta = Math.Cos(radians);
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var sinTheta = Math.Sin(radians);
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foreach (var point in Points)
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{
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var oldPoint = point;
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var tempX = oldPoint.X - CenterPoint.X;
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var tempY = oldPoint.Y - CenterPoint.X;
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var rotatedX = tempX * cosTheta - tempY * sinTheta;
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var rotatedY = tempX * sinTheta + tempY * cosTheta;
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point.X = rotatedX + CenterPoint.X;
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point.Y = rotatedY + CenterPoint.Y;
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}
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}
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public void Move(double deltaX, double deltaY)
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{
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var tmpCenter = CenterPoint;
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foreach (var point in Points)
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{
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var tmpPoint = point - tmpCenter;
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point.X = deltaX + tmpPoint.X;
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point.Y = deltaY + tmpPoint.Y;
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}
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CenterPoint = new Point(deltaX, deltaY);
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}
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}
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} |