Draw Mesh by Triangle List

akira32

That is special case for my research about Adpative Shadow Maps.
I must do that first. But I encounter a problem the result is not like the one I want. I think maybe my code has some mistakes. Could somebody take some time to my source code.

1. 
   
2.         struct ASM_VERTEX
   
3.         {
   
4.                 D3DXVECTOR3 p, n;
   
5.                 float u;
   
6.                 float v;
   
7.         };
   
8.        
   
9.         ASM_VERTEX*                m_pVertices;
   
10.         DWORD                        m_dwNumFaces;
    
11. 
    
12.         WORD*       pIndices;
    
13.         LPD3DXMESH pMesh;
    
14.         DWORD nFVF;
    
15.         DWORD dwNumFaces;
    
16. 
    
17.         nFVF=m_MeshShip.GetLocalMesh()->GetFVF();//D3DFVF_XYZ|D3DFVF_NORMAL|D3DFVF_TEX1
    
18. 
    
19.         FAILED(m_MeshShip.GetLocalMesh()->CloneMeshFVF(
    
20.                 D3DXMESH_SYSTEMMEM,
    
21.                 nFVF,
    
22.                 pd3dDevice,
    
23.                 &pMesh
    
24.                 ));
    
25. 
    
26.         dwNumFaces=pMesh->GetNumFaces();
    
27.         m_dwNumFaces = 4*dwNumFaces;
    
28. 
    
29.         ASM_VERTEX * pVertices;
    
30.         D3DXVECTOR3 *vNormal;
    
31.        
    
32.         m_pVertices = new ASM_VERTEX[3*m_dwNumFaces];
    
33.         vNormal = new D3DXVECTOR3[dwNumFaces];
    
34. 
    
35.         // lock buffers
    
36.         pMesh->LockVertexBuffer( 0L, (LPVOID*)&pVertices );
    
37.         pMesh->LockIndexBuffer ( 0L, (LPVOID*)&pIndices );
    
38. 
    
39.         for(DWORD i=0; i< dwNumFaces; i++ )
    
40.         {
    
41.                 D3DXVECTOR3 v0 = pVertices[pIndices[3*i+0]].p;
    
42.                 D3DXVECTOR3 v1 = pVertices[pIndices[3*i+1]].p;
    
43.                 D3DXVECTOR3 v2 = pVertices[pIndices[3*i+2]].p;
    
44. 
    
45.                 // calculate normal
    
46.                 D3DXVECTOR3 vCross1(v1-v0);
    
47.                 D3DXVECTOR3 vCross2(v2-v1);
    
48.                 D3DXVec3Cross( &vNormal[i], &vCross1, &vCross2 );
    
49.                 D3DXVec3Normalize(&vNormal[i],&vNormal[i]);
    
50. 
    
51.                 // store a face               
    
52.                 m_pVertices[pIndices[3*i+0]].p = v0;
    
53.                 m_pVertices[pIndices[3*i+1]].p = v1;
    
54.                 m_pVertices[pIndices[3*i+2]].p = v2;
    
55.                 m_pVertices[pIndices[3*i+0]].n = vNormal[i];
    
56.                 m_pVertices[pIndices[3*i+1]].n = vNormal[i];
    
57.                 m_pVertices[pIndices[3*i+2]].n = vNormal[i];
    
58.         }
    
59. 
    
60.         pMesh->UnlockVertexBuffer();
    
61.         pMesh->UnlockIndexBuffer();
    
62. 
    
63.         pMesh->Release();
    
64. 
    
65.         //render
    
66.         pd3dDevice->SetFVF(nFVF);
    
67. 
    
68.         pd3dDevice->DrawPrimitiveUP(
    
69.                 D3DPT_TRIANGLELIST,
    
70.                 m_dwNumFaces,
    
71.                 m_pVertices,
    
72.                 sizeof(ASM_VERTEX)
    
73.                 );
    
74. 
    
75.         SAFE_DELETE(m_pVertices);
    
76.         SAFE_DELETE(vNormal);
    

复制代码

I print the result of right and error as below website:

http://www.game.csie.ndhu.edu.tw/~akira/else/space_ok.jpg
http://www.game.csie.ndhu.edu.tw/~akira/else/space_err.jpg