Problem using index buffers
Hi,
I am trying to draw a simple quad using IDirect3DIndexBuffer9 (im using directX 9 and c++). I have set de RenderState to (D3DRS_CULLMODE, D3DCULL_NONE) and i cannot see the 2 triangles of my quad.
here is my code
//#include <Windows.h>
//#include <mmsystem.h>
#include
<d3dx9.h>#pragma
warning(disable : 4996 )// disable deprecated warning#include
<strsafe.h>#pragma
warning(default : 4996 )//--
// Global variables
//--
LPDIRECT3D9 g_pD3D = NULL;
// Used to create the D3DDeviceLPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
// Our rendering deviceLPDIRECT3DVERTEXBUFFER9 g_pVB = NULL;
// Buffer to hold VerticesLPDIRECT3DINDEXBUFFER9 g_pIX =NULL;
//Buffer to hold index// A structure for our custom vertex type
struct
CUSTOMVERTEX{
FLOAT x, y, z;
// The transformed position for the vertexDWORD color;
// The vertex color};
// Our custom FVF, which describes our custom vertex structure
#define
D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE)//--
// Name: InitD3D()
// Desc: Initializes Direct3D
//--
HRESULT InitD3D( HWND hWnd )
{
// Create the D3D object.if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )return E_FAIL;// Set up the structure used to create the D3DDeviceD3DPRESENT_PARAMETERS d3dpp;
ZeroMemory( &d3dpp,
sizeof(d3dpp) );d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
// Create the D3DDeviceif( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;}
// Device state would normally be set hereg_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
return S_OK;}
HRESULT InitVB()
{
// Initialize three Vertices for rendering a quadCUSTOMVERTEX Vertices[] =
{
{ 0.0f, 0.0f, 0.0f, 0xffff0000, },
//0{ 1.0f, 0.0f, 0.0f, 0xff0000ff, },
//1{ 0.0f, 1.0f, 0.0f, 0xffff0000, },
//2{ 1.0f, 1.0f, 0.0f, 0xff0000ff, },
//3};
if( FAILED( g_pd3dDevice->CreateVertexBuffer( 4*sizeof(CUSTOMVERTEX),0, D3DFVF_CUSTOMVERTEX,
D3DPOOL_DEFAULT, &g_pVB, NULL ) ) )
{
return E_FAIL;}
VOID* pVertices;if( FAILED( g_pVB->Lock( 0, 0, (void**)&pVertices, 0 ) ) )return E_FAIL;memcpy( pVertices, Vertices,
sizeof(Vertices) );g_pVB->Unlock();
// Crear los Indicesif( FAILED(g_pd3dDevice->CreateIndexBuffer( 6 *sizeof(WORD),D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_MANAGED,&g_pIX, 0)))return E_FAIL;DWORD Indices[]={
3,1,0,
2,3,0
};
VOID *pIX;
if( FAILED(g_pIX->Lock(0, 0, (void**)&pIX, 0)))return E_FAIL;memcpy( pIX, Indices,
sizeof(Indices) );sizeof(&pIX);sizeof(Indices);g_pIX->Unlock();
DWORD x
;
D3DXVECTOR3 vEyePt( 0.0f, 0.0f,10.0f );
D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f );
D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );
D3DXMATRIXA16 matView;
D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );
D3DXMATRIXA16 matProj;
D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 10.0f, -10.0f );
g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );
return S_OK;}
//--
// Name: Cleanup()
// Desc: Releases all previously initialized objects
//--
VOID Cleanup()
{
if( g_pVB != NULL )g_pVB->Release();
if( g_pd3dDevice != NULL )g_pd3dDevice->Release();
if( g_pD3D != NULL )g_pD3D->Release();
}
//--
// Name: Render()
// Desc: Draws the scene
//--
VOID Render()
{
// Clear the backbuffer to a blue colorg_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255,255,255), 1.0f, 0 );
// Begin the sceneif( SUCCEEDED( g_pd3dDevice->BeginScene() ) ){
g_pd3dDevice->SetStreamSource( 0, g_pVB, 0,sizeof(CUSTOMVERTEX) );g_pd3dDevice->SetIndices(g_pIX);
g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, 4, 0, 2);
// End the sceneg_pd3dDevice->EndScene();
}
// Present the backbuffer contents to the displayg_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
//--
// Name: MsgProc()
// Desc: The window's message handler
//--
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg ){
case WM_DESTROY:Cleanup();
PostQuitMessage( 0 );
return 0;}
return DefWindowProc( hWnd, msg, wParam, lParam );}
//--
// Name: WinMain()
// Desc: The application's entry point
//--
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
// Register the window classWNDCLASSEX wc = {
sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
"D3D Tutorial", NULL };RegisterClassEx( &wc );
// Create the application's windowHWND hWnd = CreateWindow(
"D3D Tutorial","D3D Tutorial 02: Vertices",WS_OVERLAPPEDWINDOW, 100, 100, 300, 300,
NULL, NULL, wc.hInstance, NULL );
// Initialize Direct3Dif( SUCCEEDED( InitD3D( hWnd ) ) ){
// Create the vertex bufferif( SUCCEEDED( InitVB() ) ){
// Show the windowShowWindow( hWnd, SW_SHOWDEFAULT );
UpdateWindow( hWnd );
// Enter the message loopMSG msg;
ZeroMemory( &msg,
sizeof(msg) );while( msg.message!=WM_QUIT ){
if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) ){
TranslateMessage( &msg );
DispatchMessage( &msg );
}
elseRender();
}
}
}
UnregisterClass(
"D3D Tutorial", wc.hInstance );return 0;}
