wo80
101 lines
2.6 KiB
C#
101 lines
2.6 KiB
C#
// -----------------------------------------------------------------------
|
|
// <copyright file="RingPolygon.cs" company="">
|
|
// Christian Woltering, Triangle.NET, http://triangle.codeplex.com/
|
|
// </copyright>
|
|
// -----------------------------------------------------------------------
|
|
|
|
namespace MeshExplorer.Generators
|
|
{
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using TriangleNet.Geometry;
|
|
|
|
/// <summary>
|
|
/// Generates a ring polygon.
|
|
/// </summary>
|
|
public class RingPolygon : BaseGenerator
|
|
{
|
|
public RingPolygon()
|
|
{
|
|
name = "Ring";
|
|
description = "";
|
|
parameter = 2;
|
|
|
|
descriptions[0] = "Number of points:";
|
|
descriptions[1] = "Variation:";
|
|
|
|
ranges[0] = new int[] { 50, 250 };
|
|
ranges[1] = new int[] { 0, 1 };
|
|
}
|
|
|
|
public override string ParameterDescription(int paramIndex, double paramValue)
|
|
{
|
|
if (paramIndex == 0)
|
|
{
|
|
int numRays = GetParamValueInt(paramIndex, paramValue);
|
|
return numRays.ToString();
|
|
}
|
|
|
|
if (paramIndex == 1)
|
|
{
|
|
double variation = GetParamValueDouble(paramIndex, paramValue);
|
|
return variation.ToString("0.0", Util.Nfi);
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
public override IPolygon Generate(double param0, double param1, double param2)
|
|
{
|
|
int n = GetParamValueInt(0, param0);
|
|
int m = n / 2;
|
|
|
|
var input = new Polygon(n + 1);
|
|
|
|
double ro, r = 10;
|
|
double step = 2 * Math.PI / m;
|
|
|
|
var inner = new List<Vertex>(m);
|
|
|
|
// Inner ring
|
|
for (int i = 0; i < m; i++)
|
|
{
|
|
inner.Add(new Vertex(r * Math.Cos(i * step), r * Math.Sin(i * step)));
|
|
}
|
|
|
|
input.Add(new Contour(inner, 1));
|
|
|
|
r = 1.5 * r;
|
|
|
|
var outer = new List<Vertex>(n);
|
|
|
|
step = 2 * Math.PI / n;
|
|
double offset = step / 2;
|
|
|
|
// Outer ring
|
|
for (int i = 0; i < n; i++)
|
|
{
|
|
ro = r;
|
|
|
|
if (i % 2 == 0)
|
|
{
|
|
ro = r + r * Util.Random.NextDouble() * (param1 / 100);
|
|
}
|
|
|
|
outer.Add(new Vertex(ro * Math.Cos(i * step + offset), ro * Math.Sin(i * step + offset)));
|
|
}
|
|
|
|
input.Add(new Contour(outer, 2));
|
|
|
|
input.Holes.Add(new Point(0, 0));
|
|
|
|
return input;
|
|
}
|
|
|
|
public override string ToString()
|
|
{
|
|
return this.Name;
|
|
}
|
|
}
|
|
}
|