C# 新华社提款单问题

我一直在尝试将去饱和和白噪声效果应用到我的XNA项目中，我成功地做到了这一点，但现在我在绘制顺序方面遇到了一些问题

在下面的代码中，注释掉的行是导致问题的原因。如果对它们进行了注释，则绘制顺序问题已得到修复，但屏幕不会去饱和。当它们未注释时，屏幕会如我所愿地去饱和，但会出现绘图顺序问题

//GraphicsDevice.SetRenderTarget(scaleupTarget);
GraphicsDevice.Clear(Color.SeaGreen);            

DrawModel(building_a_mdl, (Matrix.Identity * Matrix.CreateTranslation(100, -14, -100)), building_a_tex);

/*GraphicsDevice.SetRenderTarget(null);
scaleupEffect.Parameters["RandomOffset"].SetValue((float)rng.NextDouble());
GraphicsDevice.Textures[1] = noiseTexture;
spriteBatch.Begin(
    SpriteSortMode.Texture,
    BlendState.AlphaBlend,
    SamplerState.PointClamp,
    null,
    null,
    scaleupEffect);
spriteBatch.Draw(scaleupTarget, Vector2.Zero, null, Color.White, 0.0f, Vector2.Zero, upScaleAmount, SpriteEffects.None, 0.0f);
spriteBatch.End();*/

---

我怀疑，即使您试图更改

DepthStencilState

，它仍然是您问题的关键所在

调用

SpriteBatch.Begin（）

的过程会关闭深度缓冲区测试，因为在

SpriteBatch.Draw（）调用的2d渲染中不需要深度缓冲区测试。然后在下一帧，当你开始绘制3d素材时，它仍然处于关闭状态，并且你遇到了问题

因此，在绘制3d素材之前，请确保将DepthStencilState设置回默认值

GraphicsDevice.Clear(Color.SeaGreen);

GraphicsDevice.BlendState = BlendState.Opaque;
GraphicsDevice.DepthStencilState = DepthStencilState.Default;            

DrawModel(building_a_mdl, (Matrix.Identity * Matrix.CreateTranslation(100, -14, -100)), building_a_tex);

请参阅此链接以获取参考：
请尝试以下代码：

    RenderTarget2D scaleupTarget = null;

    protected override void Draw(GameTime gameTime)
    {                        
            if (scaleupTarget == null)
            {
                    // be sure to keep the depthformat when creating the new renderTarget2d
                    scaleupTarget = new RenderTarget2D(GraphicsDevice, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height, false, SurfaceFormat.Color, DepthFormat.Depth24);                
            }        
            GraphicsDevice.SetRenderTarget(scaleupTarget);
            GraphicsDevice.Clear(ClearOptions.Target, Color.SeaGreen, 1.0f, 0);
            GraphicsDevice.BlendState = BlendState.Opaque;
            GraphicsDevice.DepthStencilState = DepthStencilState.Default;

            // Setup the rasterState, 
            // if CullMode.None; works, try with 
            // CullMode.CullCounterClockwiseFace
            // afterwards
            var rs = new RasterizerState();
            rs.CullMode = CullMode.None;
            rs.FillMode = FillMode.Solid;

            // Set the GraphicsDevice to use the new RasterizeState
            GraphicsDevice.RasterizerState = rs;

            DrawModel(building_a_mdl, (Matrix.Identity * Matrix.CreateTranslation(100, -14, -100)), building_a_tex);

            scaleupEffect.Parameters["RandomOffset"].SetValue((float)rng.NextDouble());
            GraphicsDevice.Textures[1] = noiseTexture;

            GraphicsDevice.SetRenderTarget(null);

            // SpriteBatch.Begin will set the GraphicsDevice.DepthStencilState to None.
            spriteBatch.Begin(
                    SpriteSortMode.Texture,
                    BlendState.AlphaBlend,
                    SamplerState.PointClamp,
                    null,
                    null,
                    scaleupEffect);
            spriteBatch.Draw(scaleupTarget, Vector2.Zero, null, Color.White, 0.0f, Vector2.Zero, upScaleAmount, SpriteEffects.None, 0.0f);            
            spriteBatch.End();

            // Set back to the original depthstate before you continue.
            GraphicsDevice.DepthStencilState = DepthStencilState.Default;
    }

什么东西画得不对？在调用SpriteBatch.Begin（）时，您是否尝试过更改BlendState？@davidsbro，如果您仔细观察黑白图像（很难看到），但您可以看到从建筑的另一侧通过它渲染的窗口-一组横穿模型的条形图。我已经更改了BlendState、SpriteSortMode和SamplerState，一切都没有运气。@詹姆斯蒙格在绘制模型之前是否更改了DepthStencialState和光栅化状态？@Blau我更改了DepthStencilState，但没有运气-我没有更改光栅化状态。为什么不在绘制三维模型之前尝试设置“GraphicsDevice.RenderState.DepthBufferEnable=true”这条线。我只记得我遇到了与您相同的问题，在每次抽签之前都将此设置为真。不幸的是，仍然存在问题，我截图并将其放在这里：