Custom vertex declaration for use in 2D?

@mgulde wrote:

Dear all,

I am at a bit of a loss concerning how to pass data to a custom pixel shader when drawing sprites from a sprite batch.

I am drawing a 2D tile-based landscape and would like to additionally pass information on the height of the tile for later use. In 3D, I would use a custom vertex declaration and store the needed information in, e.g., an additional texture coordinate. However, I do not know how to access the vertex declaration when using the SpriteBatch.Draw() method.

Here is the (default) VertexShaderOutput I am using right now:

struct VertexShaderOutput
{
	float4 Position		: SV_POSITION;
	float4 Color		: COLOR0;
	float2 TexCoord	: TEXCOORD0;
};

Now, is there a way to use a custom vertex declaration instead?

Alternatively, I could use an additional Texture2D object to pass height information. then I would also need to pass the tile position so that I can relate the height information to the correct tile.

So I am pretty much stuck at the moment, even though I am sure I am overlooking something fundamental. Any help (or alternative approach) would be highly appreciated.

Thanks!

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