wo80
72 lines
1.9 KiB
C#
72 lines
1.9 KiB
C#
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namespace TriangleNet.Examples
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{
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using TriangleNet;
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using TriangleNet.Geometry;
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using TriangleNet.Meshing;
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using TriangleNet.Rendering.Text;
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using TriangleNet.Smoothing;
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/// <summary>
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/// Refine only a part of a polygon mesh by using region pointers and an area constraint.
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/// </summary>
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public class Example4
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{
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public static bool Run(bool print = false)
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{
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// Generate the input geometry.
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var poly = CreatePolygon();
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// Define regions (first one defines the area constraint).
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poly.Regions.Add(new RegionPointer(1.5, 0.0, 1, 0.01));
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poly.Regions.Add(new RegionPointer(2.5, 0.0, 2));
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// Set quality and constraint options.
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var options = new ConstraintOptions()
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{
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ConformingDelaunay = true
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};
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var quality = new QualityOptions()
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{
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MinimumAngle = 25.0,
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VariableArea = true
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};
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//quality.UserTest = (t, area) => t.Label == 1 && area > 0.01;
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var mesh = poly.Triangulate(options, quality);
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var smoother = new SimpleSmoother();
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smoother.Smooth(mesh, 5);
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if (print) SvgImage.Save(mesh, "example-4.svg", 500);
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return true;
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}
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public static IPolygon CreatePolygon()
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{
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// Generate three concentric circles.
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var poly = new Polygon();
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// Center point.
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var center = new Point(0, 0);
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// Inner contour (hole).
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poly.Add(Generate.Circle(1.0, center, 0.1, 1), center);
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// Internal contour.
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poly.Add(Generate.Circle(2.0, center, 0.1, 2));
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// Outer contour.
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poly.Add(Generate.Circle(3.0, center, 0.3, 3));
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// Note that the outer contour has a larger segment size!
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return poly;
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}
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}
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}
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