void WDrawNode::drawSmoothSpline(PointArray *config, float tension, unsigned int segments, const Color4F &color)
{
    Vec2* vertices = new (std::nothrow) Vec2[segments + 1];
    if (!vertices)
        return;

    ssize_t p;
    float lt;
    float deltaT = 1.0f / config->count();

    Vec2 lastPos;
    Vec2 lastN;

    for (unsigned int i = 0; i < segments + 1; i++) {

        float dt = (float)i / segments;

        // border
        if (dt == 1) {
            p = config->count() - 1;
            lt = 1;
        }
        else {
            p = dt / deltaT;
            lt = (dt - deltaT * (float)p) / deltaT;
        }

        // Interpolate
        Vec2 pp0 = config->getControlPointAtIndex(p - 1);
        Vec2 pp1 = config->getControlPointAtIndex(p + 0);
        Vec2 pp2 = config->getControlPointAtIndex(p + 1);
        Vec2 pp3 = config->getControlPointAtIndex(p + 2);

        Vec2 newPos = ccCardinalSplineAt(pp0, pp1, pp2, pp3, tension, lt);

        if (i == 0)
        {
            lastPos = newPos;
            continue;
        }

        Vec2 n = newPos - lastPos;
        n = Vec2(-n.y, n.x);
        n.normalize();

        if (i == 1)
        {
            lastN = 0.5f * n;
        }

        Vec2 p1 = lastPos + lastN * _lineWidth;
        Vec2 p2 = lastPos + lastN * -_lineWidth;
        Vec2 p3 = newPos + n * _lineWidth;
        Vec2 p4 = newPos + n * -_lineWidth;

        drawTriangle(p1, p3, p2, color);
        drawTriangle(p3, p4, p2, color);
        lastPos = newPos;
        lastN = n;

        //vertices[i].x = newPos.x;
        //vertices[i].y = newPos.y;
    }
    //drawPoly(vertices, segments + 1, false, color);

    CC_SAFE_DELETE_ARRAY(vertices);
}