Question

我是c＃中的DirectX新手，有一个让我困惑的问题，基本上我想在屏幕上渲染两个立方体，一个靠近相机，另一个远离相机，我期望的是更接近的一个总是在另一个前面，但事实上，它取决于渲染序列，最后渲染的一个总是在另一个前面，我试图清除z缓冲区但是那样做根本不工作，所以我想知道是否有什么我做错了？

以下是我的代码段

private void Form1_Load(object sender, EventArgs e)
    {
        PresentParameters presentParams = new PresentParameters();
        presentParams.Windowed = true;
        presentParams.SwapEffect = SwapEffect.Discard;
        presentParams.EnableAutoDepthStencil = true;
        presentParams.AutoDepthStencilFormat = DepthFormat.D16;

        device = new Device(0, DeviceType.Hardware, this, CreateFlags.MixedVertexProcessing, presentParams);
        device.VertexFormat = CustomVertex.PositionColored.Format;
        device.RenderState.CullMode = Cull.CounterClockwise;
        device.RenderState.Lighting = false;

        Matrix projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Height, 0f, 10000.0f);
        device.Transform.Projection = projection;
    }

protected override void OnPaint(PaintEventArgs e)
    {
        Cube a = new Cube(new Vector3(0, 0, 0), 5);
        Cube b = new Cube(new Vector3(0, 0, 15), 5);
        device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.DarkGray, 1, 0);
        device.BeginScene();
        Matrix viewMatrix = Matrix.LookAtLH(cameraPosition, targetPosition, up);
        device.Transform.View = viewMatrix;
        device.DrawIndexedUserPrimitives(PrimitiveType.TriangleList, 0, 8, 12, a.IndexData, false, a.GetVertices());
        device.DrawIndexedUserPrimitives(PrimitiveType.TriangleList, 0, 8, 12, b.IndexData, false, b.GetVertices());
        device.EndScene();
        device.Present();
    }

Answer 1

好吧，我终于通过改变

解决了这个问题

Matrix projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Height, 0f, 10000.0f);

到

Matrix projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Height, 1f, 10000.0f);

但我不知道原因，为什么会发生这种情况，有人知道吗？

Directx 3D更远的物体覆盖更近的物体

1 个答案: