Unity游戏开发中的桥接模式

   /// <summary>
    /// 绘图引擎（实现体接口和实现体）
    /// </summary>
    public abstract class RenderEngine
    {
        public abstract void Render(string objName);
    }
    /// <summary>
    /// DirectX 引擎
    /// </summary>
    public class DirectX : RenderEngine
    {
        public override void Render(string objName)
        {
            DXRender(objName);
        }
        public void DXRender(string objName)
        {
            //print "ObjName"
        }
    }
    /// <summary>
    /// OpenGL 引擎
    /// </summary>
    public class OpenGL : RenderEngine
    {
        public override void Render(string objName)
        {
            GLRender(objName);
        }
        public void GLRender(string objName)
        {
            //print "ObjName"
        }
    }

/// <summary>
    /// 形状 (抽象接口)
    /// </summary>
    public abstract class IShape
    {
        protected RenderEngine renderEngine = null;
        public void SetRenderEngine(RenderEngine renderEngine)
        {
            this.renderEngine = renderEngine;
        }
        public abstract void Draw();
    }

   /// <summary>
    /// 球体
    /// </summary>
    public class Sphere : IShape
    {
        public override void Draw()
        {
            renderEngine.Render("Sphere");
        }
    }
    /// <summary>
    /// 圆柱体
    /// </summary>
    public class Cube : IShape
    {
        public override void Draw()
        {
            renderEngine.Render("Cube");
        }
    }
    /// <summary>
    /// 圆柱体
    /// </summary>
    public class Cylinder : IShape
    {
        public override void Draw()
        {
            renderEngine.Render("Cylinder");
        }
    }