using System.Collections.Generic;
using FarseerPhysics.Collision.Shapes;
using FarseerPhysics.Common;
using FarseerPhysics.Dynamics;
using Microsoft.Xna.Framework;
namespace FarseerPhysics.Factories
{
public static class LinkFactory
{
///
/// Creates a chain.
///
/// The world.
/// The start.
/// The end.
/// The width.
/// The height.
/// if set to true [fix start].
/// if set to true [fix end].
/// The number of links.
/// The link density.
///
public static Path CreateChain(World world, Vector2 start, Vector2 end, float linkWidth, float linkHeight,
bool fixStart, bool fixEnd, int numberOfLinks, float linkDensity)
{
//Chain start / end
Path path = new Path();
path.Add(start);
path.Add(end);
//A single chainlink
PolygonShape shape = new PolygonShape(PolygonTools.CreateRectangle(linkWidth, linkHeight), linkDensity);
//Use PathManager to create all the chainlinks based on the chainlink created before.
List chainLinks = PathManager.EvenlyDistributeShapesAlongPath(world, path, shape, BodyType.Dynamic,
numberOfLinks);
if (fixStart)
{
//Fix the first chainlink to the world
JointFactory.CreateFixedRevoluteJoint(world, chainLinks[0], new Vector2(0, -(linkHeight / 2)),
chainLinks[0].Position);
}
if (fixEnd)
{
//Fix the last chainlink to the world
JointFactory.CreateFixedRevoluteJoint(world, chainLinks[chainLinks.Count - 1],
new Vector2(0, (linkHeight / 2)),
chainLinks[chainLinks.Count - 1].Position);
}
//Attach all the chainlinks together with a revolute joint
PathManager.AttachBodiesWithRevoluteJoint(world, chainLinks, new Vector2(0, -linkHeight),
new Vector2(0, linkHeight),
false, false);
return (path);
}
}
}