Example usage for com.badlogic.gdx.utils Array addAll

Introduction

In this page you can find the example usage for com.badlogic.gdx.utils Array addAll.

Prototype

public void addAll(T[] array, int offset, int length) 

Source Link

Usage

From source file:com.infunity.isometricgame.shared.utils.dermetfan.GeometryUtils.java

License:Apache License

/** @param vertices the vertices to arrange in clockwise order */
public static void arrangeClockwise(Array<Vector2> vertices) {
    // http://www.emanueleferonato.com/2011/08/05/slicing-splitting-and-cutting-objects-with-box2d-part-4-using-real-graphics
    int n = vertices.size, i1 = 1, i2 = vertices.size - 1;

    if (tmpVecArr == null || tmpVecArr.length < n)
        tmpVecArr = new Vector2[vertices.size];
    System.arraycopy(vertices.items, 0, tmpVecArr, 0, n);
    Arrays.sort(tmpVecArr, arrangeClockwiseComparator);

    tmpVecArr[0] = vertices.get(0);// w  w  w  .j  ava  2 s  . c  o  m
    Vector2 C = vertices.get(0);
    Vector2 D = vertices.get(n - 1);

    float det;
    for (int i = 1; i < n - 1; i++) {
        det = det(C.x, C.y, D.x, D.y, vertices.get(i).x, vertices.get(i).y);
        if (det < 0)
            tmpVecArr[i1++] = vertices.get(i);
        else
            tmpVecArr[i2--] = vertices.get(i);
    }

    tmpVecArr[i1] = vertices.get(n - 1);

    vertices.clear();
    vertices.addAll(tmpVecArr, 0, n);
}

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