SND\wo80_cp
c2fdcea816
Removed MeshData class (use InputGeometry for mesh input) Direct access to mesh geometry using public properties Lots of smaller changes git-svn-id: https://triangle.svn.codeplex.com/svn@67719 0e2699bc-83d4-4a8f-98e7-55e24ab8c7a5
116 lines
3.3 KiB
C#
116 lines
3.3 KiB
C#
// -----------------------------------------------------------------------
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// <copyright file="PolygonGenerator.cs" company="">
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// TODO: Update copyright text.
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// </copyright>
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// -----------------------------------------------------------------------
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namespace MeshExplorer
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{
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using MeshExplorer.IO;
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using TriangleNet.IO;
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using MeshExplorer.Rendering;
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using TriangleNet.Geometry;
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/// <summary>
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/// TODO: Update summary.
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/// </summary>
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public static class PolygonGenerator
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{
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public static InputGeometry StarInBox(int n)
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{
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InputGeometry input = new InputGeometry(n + 4);
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input.AddPoint(0, 0); // Center
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double x, y, r, e, step = 2 * Math.PI / n;
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for (int i = 0; i < n; i++)
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{
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e = Util.Random.NextDouble() * step * 0.7;
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r = (Util.Random.NextDouble() + 0.7) * 0.5;
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x = r * Math.Cos(i * step + e);
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y = r * Math.Sin(i * step + e);
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input.AddPoint(x, y);
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input.AddSegment(0, i + 1);
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}
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input.AddPoint(-1, -1); // Box
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input.AddPoint(1, -1);
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input.AddPoint(1, 1);
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input.AddPoint(-1, 1);
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n = input.Count;
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input.AddSegment(n - 1, n - 2);
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input.AddSegment(n - 2, n - 3);
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input.AddSegment(n - 3, n - 4);
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input.AddSegment(n - 4, n - 1);
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return input;
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}
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public static InputGeometry CreateRandomPoints(int numPoints, int width, int height)
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{
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InputGeometry input = new InputGeometry(numPoints);
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for (int i = 0; i < numPoints; i++)
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{
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input.AddPoint(Util.Random.NextDouble() * width,
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Util.Random.NextDouble() * height);
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}
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return input;
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}
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public static InputGeometry CreateCirclePoints(double x, double y, double r, int n)
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{
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InputGeometry input = new InputGeometry(n + 1);
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// Add center
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input.AddPoint(x, y);
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double angle = 0, step = 2 * Math.PI / n;
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while (angle < 2 * Math.PI)
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{
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input.AddPoint(r * Math.Cos(angle), r * Math.Sin(angle));
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angle += step;
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}
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return input;
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}
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public static InputGeometry CreateStarPoints(double x, double y, double r, int n)
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{
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InputGeometry input = new InputGeometry(n + 1);
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// Add center
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input.AddPoint(x, y);
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double angle = 0, step = 2 * Math.PI / n;
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while (angle < 2 * Math.PI)
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{
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input.AddPoint(r * Math.Cos(angle), r * Math.Sin(angle));
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angle += step;
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}
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angle = step / 2;
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r /= 1.5;
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while (angle < 2 * Math.PI)
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{
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input.AddPoint(r * Math.Cos(angle), r * Math.Sin(angle));
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angle += step;
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}
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return input;
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}
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}
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}
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