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Render a mesh on a texture

Started by BlueChip Jun 10, 2003 at 10:04 AM 4 replies 750+ views

Original Post

Jun 10, 2003 at 10:04 AM

Hi to all... Someone can tell me how can I render a mesh on a texture? I think that I must do in this way:

LPDIRECT3DTEXTURE9 destTex; 
LPDIRECT3DSURFACE9  destSup;
LPDIRECT3DSURFACE9  ts2=NULL;

D3DXCreateTexture (device,h,w,0,D3DUSAGE_RENDERTARGET,D3DFMT_UNKNOWN,D3DPOOL_DEFAULT,&destTex);
destTex->GetSurfaceLevel(0,&destSup);
m_pd3dDevice->SetRenderTarget(0,destSup);

Then?? I should do 1)render the mesh on destSup.... 2)Set old render target... 3)to use my new texture destTex.. I''ve forgot something? and can you teach me how do I do?

S1CA

Jun 10, 2003 at 10:09 AM

That looks ok.

Depending on what the texture represents, you might also want to change the current projection and view matrices as well as the current viewport (if the texture has different dimensions to your back buffer).

Also you''ll probably want to Clear() the render target surface before you render to it.

--
Simon O''Connor
Creative Asylum Ltd
www.creative-asylum.com

BlueChip

Jun 10, 2003 at 1:00 PM

I would test a Yann L. idea (perhaps this idea isn''t of Yann, but I''ve read it in his post)...

I want change 3D trees in 2D billboards when they are far...
but I wouldn''t use same 2d sprite, but a snapshot of the far tree...

In this last hours I''ve try ... and I''ve write this code:


LPDIRECT3DTEXTURE9  tex;
LPDIRECT3DSURFACE9  surfaceMaps;
LPDIRECT3DSURFACE9  stencil,old;

m_pd3dDevice->GetRenderTarget(0,&old);
m_pd3dDevice->GetDepthStencilSurface(&stencil);

D3DXCreateTexture (m_pd3dDevice,256,256,0,D3DUSAGE_RENDERTARGET,D3DFMT_UNKNOWN,D3DPOOL_DEFAULT,&tex);
tex->GetSurfaceLevel(0, &surfaceMaps);
m_pd3dDevice->SetRenderTarget(0, surfaceMaps);

m_pd3dDevice->BeginScene();
m_pCMeshtree->Render(); <---- =) this is my mesh
m_pd3dDevice->EndScene();

m_pd3dDevice->SetRenderTarget(0, current);
stencil->Release();
surfaceMaps->Release();
current->Release();

but this give me 2 problem:
1)The texture is black o_O
If I understand it, I''ll use it for shadow ^__^
2)The texture is drawed.... but there isn''t the command
m_pd3dDevice->SetTexture( 0, tex);

Can you help me ??? =)
Thanks ....

Now I go to do other test =)
byezzzzzzzzzzzzzzzzzzzz

BlueChip

Jun 11, 2003 at 6:30 AM

Noone have these problems?
or had these problems?

BlueChip

Jun 11, 2003 at 9:45 AM

No... this is the same code that I use with other textures...

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