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IDirect3DDevice8::SetTexture

Started by randal Dec 16, 2002 at 10:39 PM 2 replies 400+ views

Original Post

Dec 16, 2002 at 10:39 PM

I'm following tutorials on andypike.com. In the mesh loading tutorial when he loads the .x file, he uses 3DXCreateTextureFromFile. He checks if this function fails and if it does he sets the texture array (m_pMeshTextures) to NULL. Then in the Render function he sets the texture like m_pD3DDevice->SetTexture(0, m_pMeshTextures[i]) When the texture is NULL it appears to not load anything. Trying to load the texture and seeing if it fails, then calling SetTexture on the NULL texture interface just seems like a bad way to do this.. what would be a better way? [edited by - randal on December 17, 2002 9:28:14 AM]

CrazedGenius

Dec 17, 2002 at 12:54 AM

Setting the texture to NULL is okay. In fact, that's what you need to do to set the stage to no texture.

Read the docs:

quote:
When the texture is no longer needed, set the texture at the appropriate stage to NULL. Failure to do this results in a memory leak.

It's the way to decrement the ref count on the current texture (before shutting down, etc.)

Author, "Real Time Rendering Tricks and Techniques in DirectX", "Focus on Curves and Surfaces"

[edited by - CrazedGenius on December 17, 2002 1:56:51 AM]

randal

Dec 17, 2002 at 8:27 AM

hey thanks for the reply. I actually did check the docs first but for whatever reason I didn''t see that at the time. I musta been pretty tired cause I checked again and did see the info I needed. It still seems strange to me though to check if 3DXCreateTextureFromFile failed, then set the texture to NULL.

mickey

Dec 17, 2002 at 9:58 AM

hi randal,

if the D3DXCreateTextureFromFile fails, and he didn''t set the texture to NULL, then when the render function comes, it will break,

so.., probably rather than having his render function liks this,


void Render()
{
   if(theres a texture)
      SetTexture();
    RenderXFile();
}

he can then instead omit the if, then just call on SetTexture and it won''t break because it''s set to NULL anyways,

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