CUSTOMVERTEX triangleVertices[] =
{
{250.0f, 200.0f, 0.0f, 1.0f, 0.0f, 0.0f,),
{550.0f, 200.0f, 0.0f, 1.0f, 1.0f, 0.0f,),
{250.0f, 400.0f, 0.0f, 1.0f, 0.0f, 1.0f,},
{550.0f, 200.0f, 0.0f, 1.0f, 1.0f, 0.0f,),
{550.0f, 400.0f, 0.0f, 1.0f, 1.0f, 1.0f,),
};
if( FAILED( hr = g_pd3dDevice->CreateVertexBuffer( 6*sizeof(CUSTOMVERTEX), 0, D3DFVF_CUSTOMVERTEX,D3DPOOL_DEFAULT, &g_pVB, NULL ) ) )
{
Msg(TEXT("Could not create a vertex buffer! hr=0x%x"), hr);
return E_FAIL;
}
// Fill the vertex buffer. We are setting the tu and tv texture
// coordinates, which range from 0.0 to 1.0
CUSTOMVERTEX* pVertices;
if ( FAILED( hr = g_pVB->Lock( 0, 0, (void**)&pVertices, 0 ) ) )
{
Msg(TEXT("Could not lock the vertex buffer! hr=0x%x"), hr);
return E_FAIL;
}
g_pVB->Unlock();
// DShow: Set up filter graph with our custom renderer.
if( FAILED( InitDShowTextureRenderer() ) )
return E_FAIL;
return S_OK;
DirectShow, render an avi to texture
Author
hi there ive been playing around with directshow and i want to render an avi to a texture. im using the sdk samples but im having problems with working out how to get rid of that damn cylinder surface and just have a flat square surface.
ive done most of the code for shoinbg a surface but i cant render the avi onto it . . how would i go about doing this, here is some of my code
then the rest is just the dx8 directshow sample for rendering an avi to texture.
cna anyone help me out and explain where ive gone wrong, im pretty sure its to do with the fact that i dont fully understand how to texture to surfaces properly
[Edited by - zerotheend2000 on September 1, 2005 5:55:40 AM]
Author
hmm, if u look at the sdk texture3d example, where would i put my code in the
InitGeometry() part, or should i say what code whould i add to make a simple square play my avi?
InitGeometry() part, or should i say what code whould i add to make a simple square play my avi?
Author
i think i need an eqivalent example of creating a square plane.
the cylinder code is as follows:
what would be a recatgular plane equivalent
the cylinder code is as follows:
{ FLOAT theta = (2*D3DX_PI*i)/(nGrid-1.f) + (FLOAT)(D3DX_PI/2.f); pVertices[2*i+0].position = D3DXVECTOR3( sinf(theta),-1.0f, cosf(theta) ); pVertices[2*i+0].color = 0xffffffff; pVertices[2*i+0].tu = ((FLOAT)i)/((FLOAT)nGrid-1.f); pVertices[2*i+0].tv = 1.0f; pVertices[2*i+1].position = D3DXVECTOR3( sinf(theta), 1.0f, cosf(theta) ); pVertices[2*i+1].color = 0xffffffff; pVertices[2*i+1].tu = ((FLOAT)i)/((FLOAT)nGrid-1.f); pVertices[2*i+1].tv = 0.0f; }what would be a recatgular plane equivalent
pVertices[0].position = D3DXVECTOR3(-1.f, -1.f, 0.f);pVertices[1].position = D3DXVECTOR3( 1.f, -1.f, 0.f);pVertices[2].position = D3DXVECTOR3( 1.f, 1.f, 0.f);pVertices[3].position = D3DXVECTOR3(-1.f, 1.f, 0.f);
Author
wouldnt it be 6 elements . . to make a square dont u use 2 triangles? . . this has me a bit confused. do you see what i want to do tho? I want the example of the directshow in the sample viewer, texture3d9 to be a flat plane rather than the cylinder.
Author
all im trying to do is change the sample in the dx9 sample browser named 'texture 3d' from a rotating cylinder to a flat sqaure, how would i do this?
Quote:Original post by zerotheend2000Render it as a triangle fan. Two triangles, four vertices.
wouldnt it be 6 elements . . to make a square dont u use 2 triangles?
If you can't figure out how to set up vertices for a basic quad, you really may want to spend some more time studying basic 3D before messing with streaming video-to-texture and suchlike...
Author
i know how to set up basic quads, thats not a problem, its just i cant get them to replace the code in the sample, when i do i get a wierd looking result, im just asking for a little helping hand in the right direction. i appreciate ur responses but i wouldnt be asking here if i could get the info from somewhere else
This topic is closed to new replies.
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