Does LPD3DXMESH have built in values I can adjust manually?

Does LPD3DXMESH have built in values I can adjust manually?

• Jos Verlinde

  Well heres the thing I want to translate my cube according to x,y values along the world axises. Does the D3DXMatrixTranslation do what I want

  
  

• Greg Van Mullem

  The meshes itself doesn’t contain build in values for this. If you want to translate/scale or rotate them you have to build a matrix for this operation (Direct3DX contains helper for this) and use it as part of your transformation. If you use the fixed function pipeline you have to set it as world matrix. The shader pipeline needs it as constant on the right registers.

  
  
  

• Boman

  I actually have my code configured now. The problem I am having now is that my object rotates around the center of the world axis Y instead of the objects axis. I guess my quesition now would be do i rotate and then translate or translate then rotate my cube..

  
  

• Asiye

  Ok so I have my device.

  LPDIRECT3DDEVICE9 pDevice;

  I also have my Mesh object:

  LPD3DXMESH oglla;

  THen my matrix .

  D3DXMATRIX pTheWorld;

  1st:

  I load my mesh into the device.

  if FAILED(D3DXLoadMeshFromX("MYCUBE.x", D3DXMESH_SYSTEMMEM, pDevice, NULL, &mymodel1, NULL, &dnumofMats, &oglla))

  {

  MessageBox(hWnd, "D3DXLoadMeshFromX", "Failed to Load", MB_OK);

  }

  2nd

  pDevice->SetTransform(D3DTS_WORLD, &pTheWorld);

  then what

  
  

• FreeHansje

  You need to associate the device with your matrix before you call DrawSubset for the mesh

  pDevice->SetTransform (D3DTS_WORLD, pTheWorld);

  oglla-> DrawSubset (0);

  
  
  

• Sandrix

  Well, actually things are the same for multiple models scene, D3DXMatrixTranslation here is really useful

  Try this code (it looks very familiar, doesn't it )

  static float DistanceZ=1.0;

  D3DXMATRIXA16 mWorld;
  D3DXMATRIXA16 mTrans;

  D3DXMatrixTranslation(&mTrans, 0, 0, DistanceZ);

  DistanceZ+=0.05;//try to change this value

  mWorld=mWorld*mTrans;

  pDevice->SetTransform( D3DTS_WORLD, &mWorld );

  // here goes model #1 drawing part
  //DrawSubset..............

  // Here we set the matrices to Identity, that is containing zeroes everywhere but in the main diagonal to previous values not to affect the second model transformations:

  D3DXMatrixIdentity(&mWorld);
  D3DXMatrixIdentity(&mTrans);

  D3DXMatrixTranslation(&mTrans, 0.5, 0, 1.0);

  mWorld=mWorld*mTrans;

  pDevice->SetTransform( D3DTS_WORLD, &mWorld );

  // here goes model #2 drawing part
  //DrawSubset..............

  
  

• robinjam

  Have you already take a look in the 6 tutorial examples in the SDK The 6^th one shows what you want to do.

  
  
  

• SQuen

  How do I associate my mesh with the matrix

  LPD3DXMESH oglla;

  D3DXMATRIX pTheWorld;

  Basically I want my mesh to be loaded into the matrix and then transform the matrix according the what my input values are.

  
  

• Talkless

  Actually, I tried to answer your question at the beginning of the thread...

  As for your last one, use this: mWorld=mRotateY*mTrans, that is , rotate first, then translate. Was it hard to try it yourself

  
  
• Does LPD3DXMESH have built in values I can adjust manually?