技术文章 > 利用C#+GDIPLUS模拟杂乱无章的现实场景

利用C#+GDIPLUS模拟杂乱无章的现实场景

2018-07-19 17:25

文档管理软件,文档管理系统,知识管理系统,档案管理系统的技术资料:
疯狂的图形(利用C# + GDI plus模拟杂乱无章的现实场景)

本文给出了模拟竹叶、长叶草、杂乱石头、天上繁星等关键代码。使用.Net环境下C#语言,GDI+编写。

[CODE]
csharp

//模拟竹叶

//关键参数

int minCorners = 3;
int maxCorners =4;

PointF[] points = Stone.CreateStone(new Point((int)(perX * j), (int)(perY * i)), (int)(perX * 1.4f), (int)(perX * 0.009f), corners);



//模拟长叶青草

//关键参数

int minCorners = 20;
int maxCorners =38;

PointF[] points = Stone.CreateStone(new Point((int)(perX * j), (int)(perY * i)), (int)(perX * 0.88f), (int)(perX * 0.01f), corners);
g.FillClosedCurve(Brushes.Green, points, FillMode.Winding);





//模拟不规则的石块

//关键参数:

int minCorners = 3;
int maxCorners =4;

PointF[] points = Stone.CreateStone(new Point((int)(perX * j), (int)(perY * i)), (int)(perX * 0.4f), (int)(perX * 0.396f), corners);
g.FillClosedCurve(Brushes.Gray, points, FillMode.Winding);





//天上星,亮晶晶

//关键参数:

int minCorners = 3;
int maxCorners =4;

PointF[] points = Stone.CreateStone(new Point((int)(perX * j), (int)(perY * i)), (int)(perX * 0.18f), (int)(perX * 0.06f), corners);
g.FillClosedCurve(Brushes.White, points, FillMode.Winding);



//关键代码:

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;

namespace ZPXP.Com.Util
{
public static class Stone
{
public static PointF[] CreateStone(Point center, int outerRadius, int inner_radius, int arms)
{
int center_x = center.X;
int center_y = center.Y;
PointF[] points = new PointF[arms * 2];
double offset = Math.PI / 2;
double arc = 2 * Math.PI / arms;
double half = arc / 2;
double angle = 0;
for (int i = 0; i < arms; i++)
{
Random randomOuter = new Random((int)DateTime.Now.Ticks);
outerRadius = outerRadius - randomOuter.Next((int)(inner_radius * 0.06 * new Random().Next(-20,20) /30d), (int)(inner_radius * 0.08));
//outerRadius = outerRadius - randomOuter.Next((int)(inner_radius * 0.16 * new Random().Next(-20, 20) / 30d), (int)(inner_radius * 0.18));
Random randomInner = new Random(Guid.NewGuid().GetHashCode());
inner_radius = inner_radius + randomInner.Next((int)(inner_radius * 0.02 * new Random().Next(-100,100) /150d), (int)(inner_radius * 0.08));
//inner_radius = inner_radius + randomInner.Next((int)(inner_radius * 0.02 * new Random().Next(-100, 100) / 150d), (int)(inner_radius * 0.22));

if (inner_radius > outerRadius)
{
int temp = outerRadius;
outerRadius = inner_radius;
inner_radius = temp;
}
double angleTemp = arc * randomInner.Next(-5, 5) / 10d;
angle = i * arc;
angle += angleTemp;
points[i * 2].X = (float)(center_x + Math.Cos(angle - offset) * outerRadius);
points[i * 2].Y = (float)(center_y + Math.Sin(angle - offset) * outerRadius);
points[i * 2 + 1].X = (float)(center_x + Math.Cos(angle + half - offset) * inner_radius);
points[i * 2 + 1].Y = (float)(center_y + Math.Sin(angle + half - offset) * inner_radius);
}

return points;
}

}
}



测试用代码:

private void button3_Click(object sender, EventArgs e)
{
int width = 500;
int height = 500;
int x = 0;
int y = 0;
int numX = 10;
int numY =10;
float perX = width * 1f / numX;
float perY = height * 1f / numY;
Bitmap image = new Bitmap(width, height);
Graphics g = Graphics.FromImage(image);

g.CompositingQuality = CompositingQuality.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;

g.FillRectangle(Brushes.Black, new Rectangle(0,0, width, height));

int minCorners = 3;
int maxCorners =18;
int lastCorners = minCorners;
for (int i = 0; i < numX; i++)
{
for (int j = 0; j < numY; j++)
{
long tick = DateTime.Now.Ticks;
Random random = new Random((int)(tick & 0xffffffff) | (int)(tick >> 32));
int corners = random.Next(minCorners, maxCorners);
if (Math.Abs(corners - lastCorners) < (maxCorners - minCorners) / 2) corners = RetrievRandomCorners(minCorners, maxCorners);
lastCorners = corners;
//PointF[] points = Stone.CreateStone(new Point((int)(perX * j), (int)(perY * i)), (int)(perX * 0.9f), (int)(perX * 0.8f), corners);
PointF[] points = Stone.CreateStone(new Point((int)(perX * j), (int)(perY * i)), (int)(perX * 0.18f), (int)(perX * 0.06f), corners);
g.FillClosedCurve(Brushes.White, points, FillMode.Winding);
}
}

picEncode.Image = image;

}

private int RetrievRandomCorners(int minCorners, int maxCorners)
{
return new Random(Guid.NewGuid().GetHashCode()).Next(minCorners, maxCorners);
}
[/CODE]