/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.physics.box2d;

import org.jbox2d.common.Vec2;

import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.math.Vector2;

public class ChainShape extends Shape {
	org.jbox2d.collision.shapes.ChainShape shape;
	boolean isLooped = false;

	public ChainShape () {
		super(new org.jbox2d.collision.shapes.ChainShape());
		shape = (org.jbox2d.collision.shapes.ChainShape)super.shape;
	}

	ChainShape (org.jbox2d.collision.shapes.ChainShape shape) {
		super(shape);
		this.shape = shape;
	}

	@Override
	public Type getType () {
		return Type.Chain;
	}

	public void createLoop (float[] vertices) {
		Vec2[] v = new Vec2[vertices.length / 2];
		for (int i = 0; i < vertices.length; i += 2) {
			v[i] = new Vec2(vertices[i], vertices[i + 1]);
		}
		shape.createLoop(v, v.length);
		isLooped = true;
	}
	
	/** Create a loop. This automatically adjusts connectivity.
	 * @param vertices an array of vertices, these are copied */
	public void createLoop (Vector2[] vertices) {
		Vec2[] v = new Vec2[vertices.length];
		for (int i = 0; i < vertices.length; i++) {
			v[i] = new Vec2(vertices[i].x, vertices[i].y);
		}
		shape.createLoop(v, v.length);
		isLooped = true;
	}

	public void createChain (float[] vertices) {
		Vec2[] v = new Vec2[vertices.length / 2];
		for (int i = 0; i < vertices.length; i += 2) {
			v[i] = new Vec2(vertices[i], vertices[i + 1]);
		}
		shape.createChain(v, v.length);
		isLooped = false;
	}
	
	/** Create a chain with isolated end vertices.
	 * @param vertices an array of vertices, these are copied */
	public void createChain (Vector2[] vertices) {
		Vec2[] v = new Vec2[vertices.length];
		for (int i = 0; i < vertices.length; i++) {
			v[i] = new Vec2(vertices[i].x, vertices[i].y);
		}
		shape.createChain(v, v.length);
		isLooped = false;
	}

	/** Establish connectivity to a vertex that precedes the first vertex. Don't call this for loops. */
	public void setPrevVertex (Vector2 prevVertex) {
		shape.setPrevVertex(new Vec2(prevVertex.x, prevVertex.y));
	}

	/** Establish connectivity to a vertex that precedes the first vertex. Don't call this for loops. */
	public void setPrevVertex (float prevVertexX, float prevVertexY) {
		shape.setPrevVertex(new Vec2(prevVertexX, prevVertexY));
	}

	/** Establish connectivity to a vertex that follows the last vertex. Don't call this for loops. */
	public void setNextVertex (Vector2 nextVertex) {
		shape.setNextVertex(new Vec2(nextVertex.x, nextVertex.y));
	}

	/** Establish connectivity to a vertex that follows the last vertex. Don't call this for loops. */
	public void setNextVertex (float nextVertexX, float nextVertexY) {
		shape.setNextVertex(new Vec2(nextVertexX, nextVertexY));
	}

	/** @return the number of vertices */
	public int getVertexCount () {
		return shape.m_count;
	}

	/** Returns the vertex at the given position.
	 * @param index the index of the vertex 0 <= index < getVertexCount( )
	 * @param vertex vertex */
	public void getVertex (int index, Vector2 vertex) {
		Vec2 v = shape.m_vertices[index];
		vertex.set(v.x, v.y);
	}

	@Override
	public float getRadius () {
		return shape.getRadius();
	}

	@Override
	public void setRadius (float radius) {
		shape.setRadius(radius);
	}

	@Override
	public int getChildCount () {
		return shape.getChildCount();
	}

	public boolean isLooped () {
		return isLooped;
	}
}

@@ -824,16 +824,45 @@
 .Vec2;%0A%0A
+import com.badlogic.gdx.Gdx;%0A
 import c
@@ -1541,32 +1541,34 @@
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 %0A%09%09shape.createL
@@ -1910,32 +1910,34 @@
 tices%5Bi%5D.y);%0A%09%09%7D
+%09%09
 %0A%09%09shape.createL
@@ -2073,32 +2073,40 @@
 ;%0A%09%09for (int i =
+ 0, vi =
  0; i %3C vertices
@@ -2112,32 +2112,38 @@
 s.length; i += 2
+, vi++
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@@ -2127,32 +2127,33 @@
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+v
 i%5D = new Vec2(ve

Fix indexing when creating chain from float[]