顶点变形的原始图形 - C＃

Question

嘿我用原始物体制作游戏。使用Vertex Buffer创建这些对象。我遇到的问题是，当我渲染一个立方体时它看起来很完美......但是当我将它缩放得更大时，立方体变形会留下孔和锯齿状的末端。我已经尝试了很多方法来制作立方体，我无法弄明白。将立方体扩大的想法是制作一个Skybox。

以下是一些图片：

变形立方体： http://i.imgur.com/5aGu7mF.png

完美的小方块： http://i.imgur.com/FmMBb4X.png

我的代码：

使用顶点的Skybox的路径数据。

   private void loadSkyboxData(Color color)
            {
                VertexPositionColorTexture[] verts = new VertexPositionColorTexture[25];
                //Top Left 
                verts[0] = new VertexPositionColorTexture(new Vector3(-500, 500, -500), color, new Vector2(0, 0));
                verts[1] = new VertexPositionColorTexture(new Vector3(500, 500, -500), color, new Vector2(0, 0));
                verts[2] = new VertexPositionColorTexture(new Vector3(-500, -500, -500), color, new Vector2(0, 0));
                verts[3] = new VertexPositionColorTexture(new Vector3(500, -500, -500), color, new Vector2(0, 0));
                //Top Left 
                verts[4] = new VertexPositionColorTexture(new Vector3(500, 500, -500), color, new Vector2(0, 0));
                verts[5] = new VertexPositionColorTexture(new Vector3(500, 500, 500), color, new Vector2(0, 0));
                verts[6] = new VertexPositionColorTexture(new Vector3(500, -500, -500), color, new Vector2(0, 0));
                verts[7] = new VertexPositionColorTexture(new Vector3(500, -500, 500), color, new Vector2(0, 0));
                //Top Left 
                verts[8] = new VertexPositionColorTexture(new Vector3(-500, 500, 500), color, new Vector2(0, 0));
                verts[9] = new VertexPositionColorTexture(new Vector3(500, 500, 500), color, new Vector2(0, 0));
                verts[10] = new VertexPositionColorTexture(new Vector3(-500, 500, 500), color, new Vector2(0, 0));
                verts[11] = new VertexPositionColorTexture(new Vector3(500, 500, -500), color, new Vector2(0, 0));
                //Top Left 
                verts[12] = new VertexPositionColorTexture(new Vector3(500, 500, 500), color, new Vector2(0, 0));
                verts[13] = new VertexPositionColorTexture(new Vector3(-500, 500, 500), color, new Vector2(0, 0));
                verts[14] = new VertexPositionColorTexture(new Vector3(500, -500, 500), color, new Vector2(0, 0));
                verts[15] = new VertexPositionColorTexture(new Vector3(-500, -500, 500), color, new Vector2(0, 0));
                //Top Left 
                verts[16] = new VertexPositionColorTexture(new Vector3(-500, 500, 500), color, new Vector2(0, 0));
                verts[17] = new VertexPositionColorTexture(new Vector3(-500, 500, -500), color, new Vector2(0, 0));
                verts[18] = new VertexPositionColorTexture(new Vector3(-500, -500, 500), color, new Vector2(0, 0));
                verts[19] = new VertexPositionColorTexture(new Vector3(500, -500, -500), color, new Vector2(0, 0));
                //Top Left 
                verts[20] = new VertexPositionColorTexture(new Vector3(-500, -500 ,-500), color, new Vector2(0, 0));
                verts[21] = new VertexPositionColorTexture(new Vector3(500, -500, -500), color, new Vector2(0, 0));
                verts[23] = new VertexPositionColorTexture(new Vector3(-500, -500, 500), color, new Vector2(0, 0));
                verts[24] = new VertexPositionColorTexture(new Vector3(500, -500, 500), color, new Vector2(0, 0));
                vertexDictionary.Add("Skybox", new BufferedVertexTextureData(verts, PrimitiveType.TriangleStrip, 21));

BufferedVertexTextureData.cs

  public class BufferedVertexTextureData : VertexTextureData
    {
        protected VertexBuffer vertsBuffer;

        public BufferedVertexTextureData(VertexPositionColorTexture[] verts, PrimitiveType primitiveType, int primitiveCount)
            : base(verts, primitiveType, primitiveCount)
        {
            this.vertsBuffer = new VertexBuffer(Object3D.Game.GraphicsDevice, typeof(VertexPositionColorTexture), verts.Length, BufferUsage.WriteOnly);
            this.vertsBuffer.SetData(verts, 0, verts.Length);
        }

        public override void Draw(BasicEffect effect)
        {
            //apply all changes
            effect.CurrentTechnique.Passes[0].Apply();

            //instruct gfx card to use vertsbuffer
            Game.GraphicsDevice.SetVertexBuffer(vertsBuffer);

            //draw
            Game.GraphicsDevice.DrawPrimitives(PrimitiveType, 0, PrimitiveCount);
        }

    }

提前感谢您的帮助。它的伟大赞赏。