如何在XNA 4.0中取消设置纹理数据 [英] How to unset texture data in XNA 4.0

问题描述

我需要向我的像素着色器传达一些不断变化的数据.我有一个texture2d通过纹理参数传递给我的像素着色器.在调用着色器之前，我需要更新纹理中的数据.

I need to communicate some constantly changing data to my pixel shader. I have a texture2d that I am passing to my pixel shader via a texture parameter. Before I call the shader I need to update the data in the texture.

        emittingPositions.SetData(emittingPositionsBuffer); //Set the data on the texture
        animationEffect.Parameters["emittersMap"].SetValue(emittingPositions); //Tell the shader about the texture data
        //go on to do the actual drawing calls to use the pixel shader

问题是，当我这样做时，我得到一个例外:

The problem is that when I do this I get an exception:

在GraphicsDevice上主动设置资源时，您不能在资源上调用SetData.在调用SetData之前，请先从设备上取消设置."

"You may not call SetData on a resource while it is actively set on the GraphicsDevice. Unset it from the device before calling SetData."

如何从设备上取消设置"?还是我应该在这里采用其他方法?

How do I "unset it from the device"? Or should I be taking a different approach here?

推荐答案

第一个纹理是在GraphicsDevice.Textures数组中设置的，索引为0.

The first texture is set in the GraphicsDevice.Textures array with the index 0.

所以您必须这样做:

 GraphicsDevice.Textures[0] = null;

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