How to create two objects from one vertices array with translate? - directx

Question

I have an object and I can render it but I want to use its vertices twice but I don't know how to.
Edit: I wan them to translate independently during the game.
this is my code reading object from txt:
fin.open("piyon.txt");
fin >> vertexCountpiyon;
verticespiyon = new SimpleVertex[vertexCountpiyon];
for(int i=0; i<vertexCountpiyon; i++)
{
fin >> verticespiyon[i].Pos.x >> verticespiyon[i].Pos.y >> verticespiyon[i].Pos.z;
fin >> verticespiyon[i].Tex.x >> verticespiyon[i].Tex.y;
fin >> verticespiyon[i].Normal.x >> verticespiyon[i].Normal.y >> verticespiyon[i].Normal.z;
}
fin.close();
bd.ByteWidth = sizeof( SimpleVertex ) * vertexCountpiyon;
ZeroMemory( &InitData, sizeof(InitData) );
InitData.pSysMem = verticespiyon;
hr = g_pd3dDevice->CreateBuffer( &bd, &InitData, &g_pVertexBuffer_piyon );
if( FAILED( hr ) ) return hr;
and my render code:
g_pImmediateContext->IASetVertexBuffers( 0, 1, &g_pVertexBuffer_piyon, &stride, &offset );
cBuffer.vMeshColor = XMFLOAT4( 1.0f, 1.0f, 1.0f, 1.0f );
XMMATRIX mTranslateBeyazPiyon = XMMatrixTranslation( -17.5F, 0, -12.5F );
cBuffer.mWorld = XMMatrixTranspose( mTranslateBeyazPiyon );
g_World_Piyon = mTranslateBeyazPiyon;
g_pImmediateContext->UpdateSubresource( g_pConstantBuffer, 0, NULL, &cBuffer, 0, 0 );
g_pImmediateContext->VSSetShader( g_pVertexShader, NULL, 0 );
g_pImmediateContext->VSSetConstantBuffers( 2, 1, &g_pConstantBuffer );
g_pImmediateContext->PSSetShader( g_pPixelShader, NULL, 0 );
g_pImmediateContext->PSSetConstantBuffers( 2, 1, &g_pConstantBuffer );
g_pImmediateContext->Draw( 7050, 0 );

Answer 1

If you want to just draw the same object in a different place, you only need to change your world matrix and then draw again. So, using parts of your code for reference, something like this:
// set world matrix for first object ...
XMMATRIX mTranslateBeyazPiyon = XMMatrixTranslation( -17.5F, 0, -12.5F );
cBuffer.mWorld = XMMatrixTranspose( mTranslateBeyazPiyon );
g_pImmediateContext->UpdateSubresource( g_pConstantBuffer, 0, NULL, &cBuffer, 0, 0 );
// ... set any other common state
// draw first object
g_pImmediateContext->Draw( 7050, 0 );
// set world matrix for second object ... for example, translated somewhere else
mTranslateBeyazPiyon = XMMatrixTranslation( -34.5F, 0, -24.5F );
cBuffer.mWorld = XMMatrixTranspose( mTranslateBeyazPiyon );
g_pImmediateContext->UpdateSubresource( g_pConstantBuffer, 0, NULL, &cBuffer, 0, 0 );
// draw second object
g_pImmediateContext->Draw( 7050, 0 );