46 lines
1.1 KiB
C#
46 lines
1.1 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Drawing;
|
|
|
|
namespace Shapes
|
|
{
|
|
public abstract class Shape
|
|
{
|
|
|
|
public abstract double Width { get; }
|
|
public abstract double Height { get; }
|
|
public abstract double ComputeArea();
|
|
|
|
public abstract Point CenterPoint { get; }
|
|
|
|
public virtual List<Point> Points { get; }
|
|
|
|
|
|
public abstract void Scale(double scaleFactor);
|
|
|
|
|
|
public void Rotate(double degrees)
|
|
{
|
|
double radians = degrees * (Math.PI / 180);
|
|
double cosTheta = Math.Cos(radians);
|
|
double sinTheta = Math.Sin(radians);
|
|
foreach (var point in Points)
|
|
{
|
|
var oldPoint = point;
|
|
|
|
|
|
var tempX = oldPoint.X - CenterPoint.X;
|
|
var tempY = oldPoint.Y - CenterPoint.X;
|
|
|
|
var rotatedX = tempX*cosTheta - tempY*sinTheta;
|
|
var rotatedY = tempX*sinTheta + tempY*cosTheta;
|
|
|
|
point.X = rotatedX + CenterPoint.X;
|
|
point.Y = rotatedY + CenterPoint.Y;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
} |