着色器在 Monogame 中不起作用（使用着色器看起来好像没有） | C＃

Question

所以我有以下问题：

我想在我的游戏中有一个漂亮的绽放效果。但是当我尝试使用我的着色器和 shader.draw();方法被称为它看起来没有变化......看起来它不会使用着色器。此外，当我更改着色器参数时，没有任何变化。我可以将 BloomThreshold 设置为 10000f，它看起来像 0f 或 1f ...我对着色器完全陌生，所以我很高兴能得到一些帮助！

左边有着色器，右边没有着色器：

这是我的绘制循环：

protected override void Draw (GameTime gameTime) {  
    bloom.BeginDraw();
    bloom.Draw(gameTime);

    spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.Additive);
    spriteBatch.Draw(texture, new Rectangle(300, 300, 50, 50), Color.White);
    spriteBatch.End();

    base.Draw(gameTime);
}

这是我的bloom类的调用方法的摘录：

    /// <summary>
    /// This should be called at the very start of the scene rendering. The bloom
    /// component uses it to redirect drawing into its custom rendertarget, so it
    /// can capture the scene image in preparation for applying the bloom filter.
    /// </summary>
    public void BeginDraw()
    {
        if (Visible)
        {
           GraphicsDevice.SetRenderTarget(sceneRenderTarget);
        }

    }


    /// <summary>
    /// This is where it all happens. Grabs a scene that has already been rendered,
    /// and uses postprocess magic to add a glowing bloom effect over the top of it.
    /// </summary>
    public override void Draw(GameTime gameTime)
    {

        GraphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;

        // Pass 1: draw the scene into rendertarget 1, using a
        // shader that extracts only the brightest parts of the image.
        bloomExtractEffect.Parameters["BloomThreshold"].SetValue(
            Settings.BloomThreshold);

        DrawFullscreenQuad(sceneRenderTarget, renderTarget1,
                           bloomExtractEffect,
                           IntermediateBuffer.PreBloom);

        // Pass 2: draw from rendertarget 1 into rendertarget 2,
        // using a shader to apply a horizontal gaussian blur filter.
        SetBlurEffectParameters(1.0f / (float)renderTarget1.Width, 0);

        DrawFullscreenQuad(renderTarget1, renderTarget2,
                           gaussianBlurEffect,
                           IntermediateBuffer.BlurredHorizontally);


        // Pass 3: draw from rendertarget 2 back into rendertarget 1,
        // using a shader to apply a vertical gaussian blur filter.
        SetBlurEffectParameters(0, 1.0f / (float)renderTarget1.Height);

        DrawFullscreenQuad(renderTarget2, renderTarget1,
                           gaussianBlurEffect,
                           IntermediateBuffer.BlurredBothWays);

        // Pass 4: draw both rendertarget 1 and the original scene
        // image back into the main backbuffer, using a shader that
        // combines them to produce the final bloomed result.
        GraphicsDevice.SetRenderTarget(null);

        EffectParameterCollection parameters = bloomCombineEffect.Parameters;

        parameters["BloomIntensity"].SetValue(Settings.BloomIntensity);
        parameters["BaseIntensity"].SetValue(Settings.BaseIntensity);
        parameters["BloomSaturation"].SetValue(Settings.BloomSaturation);
        parameters["BaseSaturation"].SetValue(Settings.BaseSaturation);

        //GraphicsDevice.Textures[1] = sceneRenderTarget; 

        bloomCombineEffect.Parameters["BaseTexture"].SetValue(sceneRenderTarget);

        Viewport viewport = GraphicsDevice.Viewport;

        DrawFullscreenQuad(renderTarget1,
                           viewport.Width, viewport.Height,
                           bloomCombineEffect,
                           IntermediateBuffer.FinalResult);

                           System.Console.WriteLine("Draw Called");

    }

完整的classes and shader code can be found here

Answer 1

您的 sprite 批量渲染应介于 bloom.BeginDraw 和 bloom.Draw 之间。

bloom.BeginDraw 绑定了您应该将场景渲染到的sceneRenderTarget。通过这种方式，可以访问呈现的数据以在bloom.Draw 中进行进一步处理。