大家帮帮忙哈，C#图形设计的

public override void Draw(System.Drawing.Graphics g)

{

float delta = (float)Math.PI / 12;

PointF[] inPoints = new PointF[24];

PointF[] outPoints = new PointF[24];

float outA = Rectangle.Width / 2;

float outB = Rectangle.Height / 2;

float inA = Rectangle.Width * 3 / 8;

float inB = Rectangle.Height * 3 / 8;

float centerX = Rectangle.X + Rectangle.Width / 2;

float centerY = Rectangle.Y + Rectangle.Height / 2;

float inAngle = delta / 2;

float outAngle = delta;

for (int i = 0; i < 24; i++)

{

inPoints[i].X = centerX + inA * (float)Math.Cos(inAngle);

inPoints[i].Y = centerY + inB * (float)Math.Sin(inAngle);

outPoints[i].X = centerX + outA * (float)Math.Cos(outAngle);

outPoints[i].Y = centerY + outB * (float)Math.Sin(outAngle);

inAngle += delta;

outAngle += delta;

}

for (int i = 0; i < 23; i++)

{

g.DrawLine(Pens.Black, inPoints[i], outPoints[i]);

g.DrawLine(Pens.Black, outPoints[i], inPoints[i + 1]);

}

g.DrawLine(Pens.Black, inPoints[23], outPoints[23]);

g.DrawLine(Pens.Black, outPoints[23], inPoints[0]);

}

效果是画出24角型

请问，这些语句是什么意思啊？看不懂啊

float delta = (float)Math.PI / 12;

要产生的图形就是word文档中自定义图形中的24角星，然后这边用PI除以12有什么用意，超级不明白啊；而且如果把12变成8，然后改相应的数组个数，就可以产生16角星，所以不明白变量delta在这里的作用？？？？？？