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|
{
HRESULT hr = E_FAIL;
WCHAR sz[MAX_PATH];
// créé le layout du clone mesh
D3D10_INPUT_ELEMENT_DESC CloneMeshDesc[] =
{
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
{ "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 24, D3D10_INPUT_PER_VERTEX_DATA, 0 },
{ "TANGENT", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 36, D3D10_INPUT_PER_VERTEX_DATA, 0 },
{ "BINORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 48, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};
ID3DX10Mesh* pSourceMesh = g_pCube->m_pMeshDX10;
ID3DX10Mesh* pCloneMesh;
// acquiert description du vb
D3D10_PASS_DESC PassDesc;
V( g_pMeshTechnique->GetPassByIndex( 0 )->GetDesc( &PassDesc ) );
UINT uiNBElements = sizeof( CloneMeshDesc ) / sizeof( CloneMeshDesc[0] );
DWORD dwNumVertices = g_pCube->m_pMeshDX10->GetVertexCount();
DWORD dwNumIndices = g_pCube->m_pMeshDX10->GetFaceCount()*3;
// créé le input layout pour le mesh cloné
ID3D10InputLayout* CloneMeshlayout;
V( pd3dDevice->CreateInputLayout(
CloneMeshDesc,
uiNBElements,
PassDesc.pIAInputSignature,
PassDesc.IAInputSignatureSize,
&CloneMeshlayout
) );
// créé un mesh dupliqué avec nouveau layout
V( D3DX10CreateMesh(
pd3dDevice, // device
CloneMeshDesc, // déclaration de format de vertex
uiNBElements, // nombre d'éléments de la déclaration
"POSITION", // sémantique déclarant la position
dwNumVertices, // nombre de vertices
dwNumIndices/3, // nombre de faces
D3DX10_MESH_32_BIT, // options
&pCloneMesh // mesh de destination créé
) );
// acquiert les VB
ID3DX10MeshBuffer* pSrcVB;
V( pSourceMesh->GetVertexBuffer( 0, &pSrcVB ) );
ID3DX10MeshBuffer* pDestVB;
V( pCloneMesh->GetVertexBuffer( 0, &pDestVB ) );
// verrouille les VB src et dest
MESH_VERTEX* pSrcData;
V( pSrcVB->Map( (void**)&pSrcData, &dwNumVertices ) );
BNRMTGT_MESH_VERTEX* pDestData;
V( pDestVB->Map( (void**)&pDestData, &dwNumVertices ) );
// copie les données vertices du mesh source vers mesh destination
for ( int i = 0; i < (int)dwNumVertices; i++ )
{
pDestData[i].position = pSrcData[i].position;
pDestData[i].normal = pSrcData[i].normal;
pDestData[i].texuv = pSrcData[i].texuv;
}
// clone le mesh en calculant tangentes et binormales associées
CloneBnrmTgtMesh( pSourceMesh, pCloneMesh );
// DEBUG output
for ( int i = 0; i < (int)dwNumVertices; i++ )
{
StringCchPrintf( sz, 256, L"pos x:%0.2f, y:%0.2f, z:%0.2f, tex u:%0.2f, v:%0.2f\n", pDestData[i].position.x, pDestData[i].position.y, pDestData[i].position.z,
pDestData[i].texuv.x, pDestData[i].texuv.y );
OutputDebugString( sz );
StringCchPrintf( sz, 256, L"tgt x:%0.2f, y:%0.2f, z:%0.2f, bnrml x:%0.2f, y:%0.2f, z:%0.2f ", pDestData[i].tangent.x, pDestData[i].tangent.y, pDestData[i].tangent.z,
pDestData[i].binormal.x, pDestData[i].binormal.y, pDestData[i].binormal.z );
OutputDebugString( sz );
StringCchPrintf( sz, 256, L" normal x:%0.2f, y:%0.2f, z:%0.2f\n", pDestData[i].normal.x, pDestData[i].normal.y, pDestData[i].normal.z );
OutputDebugString( sz );
}
// libère les VB aprés copie
V( pSrcVB->Unmap() );
V( pDestVB->Unmap() );
// copie l'index buffer du mesh source
ID3DX10MeshBuffer* pSrcIB;
V( pSourceMesh->GetIndexBuffer( &pSrcIB ) );
ID3DX10MeshBuffer* pDestIB;
V( pSourceMesh->GetIndexBuffer( &pDestIB ) );
void* pSrcIBData;
V( pSrcIB->Map( &pSrcIBData, &dwNumIndices ) );
void* pDstIBData;
V( pDestIB->Map( &pDstIBData, &dwNumIndices ) );
memcpy( pDstIBData, pSrcIBData, dwNumIndices );
V( pSrcIB->Unmap() );
V( pDestIB->Unmap() );
return;
}
//--------------------------------------------------------------------------------------
// Nom: CloneBnrmTgtMesh(..)
// Desc: clone un mesh en calculant tangentes et binormales
//--------------------------------------------------------------------------------------
void CloneBnrmTgtMesh( ID3DX10Mesh* pSrcMesh, ID3DX10Mesh* pDestMesh )
{
HRESULT hr = E_FAIL;
int faceCount, i, index;
MESH_VERTEX vertex1, vertex2, vertex3;
D3DXVECTOR3 tangent, binormal, normal;
// nombre de faces du mesh source
DWORD dwNumVertices = pSrcMesh->GetVertexCount();
faceCount = dwNumVertices / 3;
// initialise l'index pour parcourir les vertices du mesh source
index = 0;
ID3DX10MeshBuffer* pSrcVB;
hr = pSrcMesh->GetVertexBuffer( 0, &pSrcVB );
MESH_VERTEX* pSrcData;
hr = pSrcVB->Map( (void**)&pSrcData, &dwNumVertices );
ID3DX10MeshBuffer* pDestVB;
hr = pDestMesh->GetVertexBuffer( 0, &pDestVB );
BNRMTGT_MESH_VERTEX* pDestData;
hr = pDestVB->Map( (void**)&pDestData, &dwNumVertices );
// parcoure les façes et calcule tangente, binormal, et normales
for(i=0; i<faceCount; i++)
{
// acquiert les 3 vertices pour cette face depuis le mesh source
vertex1.position.x = pSrcData[index].position.x;
vertex1.position.y = pSrcData[index].position.y;
vertex1.position.z = pSrcData[index].position.z;
vertex1.texuv.x = pSrcData[index].texuv.x;
vertex1.texuv.y = pSrcData[index].texuv.y;
vertex1.normal.x = pSrcData[index].normal.x;
vertex1.normal.y = pSrcData[index].normal.y;
vertex1.normal.z = pSrcData[index].normal.z;
index++; // vertex suivant
vertex2.position.x = pSrcData[index].position.x;
vertex2.position.y = pSrcData[index].position.y;
vertex2.position.z = pSrcData[index].position.z;
vertex2.texuv.x = pSrcData[index].texuv.x;
vertex2.texuv.y = pSrcData[index].texuv.y;
vertex2.normal.x = pSrcData[index].normal.x;
vertex2.normal.y = pSrcData[index].normal.y;
vertex2.normal.z = pSrcData[index].normal.z;
index++;
vertex3.position.x = pSrcData[index].position.x;
vertex3.position.y = pSrcData[index].position.y;
vertex3.position.z = pSrcData[index].position.z;
vertex3.texuv.x = pSrcData[index].texuv.x;
vertex3.texuv.y = pSrcData[index].texuv.y;
vertex3.normal.x = pSrcData[index].normal.x;
vertex3.normal.y = pSrcData[index].normal.y;
vertex3.normal.z = pSrcData[index].normal.z;
index++;
// calcul tangente et binormale de cette face
ComputeTangentBinormal( vertex1, vertex2, vertex3, tangent, binormal );
// calcul la nouvelle normale en utilisant tangente et binormale
ComputeNormal( tangent, binormal, normal );
// stocke les vecteurs calculés dans le nouveau mesh
pDestData[index-1].normal.x = normal.x;
pDestData[index-1].normal.y = normal.y;
pDestData[index-1].normal.z = normal.z;
pDestData[index-1].tangent.x = tangent.x;
pDestData[index-1].tangent.y = tangent.y;
pDestData[index-1].tangent.z = tangent.z;
pDestData[index-1].binormal.x = binormal.x;
pDestData[index-1].binormal.y = binormal.y;
pDestData[index-1].binormal.z = binormal.z;
pDestData[index-2].normal.x = normal.x;
pDestData[index-2].normal.y = normal.y;
pDestData[index-2].normal.z = normal.z;
pDestData[index-2].tangent.x = tangent.x;
pDestData[index-2].tangent.y = tangent.y;
pDestData[index-2].tangent.z = tangent.z;
pDestData[index-2].binormal.x = binormal.x;
pDestData[index-2].binormal.y = binormal.y;
pDestData[index-2].binormal.z = binormal.z;
pDestData[index-3].normal.x = normal.x;
pDestData[index-3].normal.y = normal.y;
pDestData[index-3].normal.z = normal.z;
pDestData[index-3].tangent.x = tangent.x;
pDestData[index-3].tangent.y = tangent.y;
pDestData[index-3].tangent.z = tangent.z;
pDestData[index-3].binormal.x = binormal.x;
pDestData[index-3].binormal.y = binormal.y;
pDestData[index-3].binormal.z = binormal.z;
}
// libère les VB
V( pSrcVB->Unmap() );
V( pDestVB->Unmap() );
return;
} |
clonage ID3DX10Mesh avec tangente et binormales
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