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Texture Splatting

Started by Programmer101 Feb 28, 2007 at 8:32 PM 0 replies 300+ views

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Feb 28, 2007 at 8:32 PM

I was reading the article on texture splatting and when I implemented it the fixed-function way, all I could see was my base texture. Here is my texture setup code:

g_pD3DDevice->SetTexture(0, groundTexture[0]);
	g_pD3DDevice->SetTexture(1, alphamap);
	g_pD3DDevice->SetTexture(2, groundTexture[1]);
	g_pD3DDevice->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);
	// Alphamap: take the alpha from the alphamap, we don't care about the color
	g_pD3DDevice->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1);
	g_pD3DDevice->SetTextureStageState(1, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);

	// Texture: take the color from the texture, take the alpha from the previous stage
	g_pD3DDevice->SetTextureStageState(2, D3DTSS_COLOROP, D3DTOP_SELECTARG1);
	g_pD3DDevice->SetTextureStageState(2, D3DTSS_COLORARG1, D3DTA_TEXTURE);
	g_pD3DDevice->SetTextureStageState(2, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1);
	g_pD3DDevice->SetTextureStageState(2, D3DTSS_ALPHAARG1, D3DTA_CURRENT);

	g_pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
	g_pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
	g_pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);

Does anyone know how to fix this?

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