64 lines
2.8 KiB
C#
64 lines
2.8 KiB
C#
using System.Collections.Generic;
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using System.Diagnostics;
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using FarseerPhysics.Collision.Shapes;
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using FarseerPhysics.Common;
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using FarseerPhysics.Dynamics;
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using Microsoft.Xna.Framework;
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namespace FarseerPhysics.Factories
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{
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public static class LinkFactory
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{
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/// <summary>
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/// Creates a chain.
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/// </summary>
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/// <param name="world">The world.</param>
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/// <param name="start">The start.</param>
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/// <param name="end">The end.</param>
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/// <param name="linkWidth">The width.</param>
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/// <param name="linkHeight">The height.</param>
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/// <param name="numberOfLinks">The number of links.</param>
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/// <param name="linkDensity">The link density.</param>
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/// <param name="attachRopeJoint">Creates a rope joint between start and end. This enforces the length of the rope. Said in another way: it makes the rope less bouncy.</param>
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/// <returns></returns>
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public static Path CreateChain(World world, Vector2 start, Vector2 end, float linkWidth, float linkHeight, int numberOfLinks, float linkDensity, bool attachRopeJoint)
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{
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Debug.Assert(numberOfLinks >= 2);
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//Chain start / end
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Path path = new Path();
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path.Add(start);
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path.Add(end);
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//A single chainlink
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PolygonShape shape = new PolygonShape(PolygonTools.CreateRectangle(linkWidth, linkHeight), linkDensity);
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//Use PathManager to create all the chainlinks based on the chainlink created before.
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List<Body> chainLinks = PathManager.EvenlyDistributeShapesAlongPath(world, path, shape, BodyType.Dynamic, numberOfLinks);
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//TODO
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//if (fixStart)
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//{
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// //Fix the first chainlink to the world
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// JointFactory.CreateFixedRevoluteJoint(world, chainLinks[0], new Vector2(0, -(linkHeight / 2)),
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// chainLinks[0].Position);
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//}
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//if (fixEnd)
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//{
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// //Fix the last chainlink to the world
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// JointFactory.CreateFixedRevoluteJoint(world, chainLinks[chainLinks.Count - 1],
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// new Vector2(0, (linkHeight / 2)),
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// chainLinks[chainLinks.Count - 1].Position);
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//}
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//Attach all the chainlinks together with a revolute joint
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PathManager.AttachBodiesWithRevoluteJoint(world, chainLinks, new Vector2(0, -linkHeight), new Vector2(0, linkHeight), false, false);
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if (attachRopeJoint)
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JointFactory.CreateRopeJoint(world, chainLinks[0], chainLinks[chainLinks.Count - 1], Vector2.Zero, Vector2.Zero);
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return (path);
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}
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}
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} |