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Why dosen't my SetTransform work?

Started by Optimal Jan 5, 2003 at 3:23 PM 4 replies 400+ views

Original Post

Jan 5, 2003 at 3:23 PM

I have never had problems with it before. But now suddenly the changes that I make using it won''t apply. This is the code I use: D3DXMatrixIdentity( &Identy ); D3DXMatrixMultiply(&matWorld,&matWorld,&Identy); D3DXMatrixRotationY( &matWorld, timeGetTime()/150.0f ); m_pDevice->SetTransform( D3DTS_WORLD, &matWorld ); And I want the transformation to affect this rendering: m_pDevice->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 1, (void*)vertices, sizeof CUSTOMVERTEX); That I call directly after I have Set the transformation. Is there something Iam missing. Or is there something that can cancel out the SetTransform? The problem is that the damn triangle won''t rotate. Hope someone can help me out

S1CA

Jan 5, 2003 at 3:41 PM

And your FVF? - it is set, it doesn''t contain D3DFVF_XYZRHW.

Have you tried taking out the timeGetTime and instead just incrementing a static variable ?

And I don''t quite get what you''re trying to achieve either:

// This won''t do _anything_ - (M*I=M)
D3DXMatrixIdentity( &Identy );
D3DXMatrixMultiply(&matWorld,&matWorld,&Identy);

1x500

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

trekey19966

Jan 5, 2003 at 4:53 PM

m_pDevice->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 1, (void*)vertices, sizeof CUSTOMVERTEX);

should be


m_pDevice->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 1, (void*)vertices, sizeof(CUSTOMVERTEX));

David Smith
www.geocities.com/gamespp5004
-"If you can''t dream it; it can''t be done"-David Smith

Optimal

Jan 5, 2003 at 9:24 PM

he he, some of that was the wrong code :
D3DXMatrixIdentity( &Identy );
D3DXMatrixMultiply(&matWorld,&matWorld,&Identy);

This was used testing something else but I did unfortunately copy it with the other code.

What Iam trying to do is to rotate the triangle in this case. Using the SetTransform and in this case transfrom the world matrix. So that the object spins.

And the problem is like I said before I dosen't seem to be used by the rendering. There is no change if I use settransform or not. The result is the same.

So please help. I have used this before but now it suddenly became a problem.

Is there anything special requered to use settransform?

Guess directx ain't my deal

[edited by - Optimal on January 5, 2003 10:27:00 PM]

S1CA

Jan 6, 2003 at 6:36 AM

Could this be your problem?

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

luxitan

Jan 6, 2003 at 6:39 AM

first of all i''m kinda new to this 3d stuff so don''t expect much

have you tried this:

D3DXMATRIX matTemp;

D3DXMatrixRotationY( &matTemp, timeGetTime()/150.0f );
D3DXMatrixMultiply(&matWorld,&matWorld,&matTemp);
m_pDevice->SetTransform( D3DTS_WORLD, &matWorld );

don''t know if it works but give it a try

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