Original Post
Greetings for the third time, gentlemen. Your advice has been really helpful so far, but i regret to bother you to tell that i need help again. It's all about matrices. I draw a sphere and then i need to get it to the center of the screen. I've come to conclusion that the operation should be View Transformation. But it isn't working. The sphere appears in the upper left corner if i don't touch the matrices, but when i do it's not on the screen. Also i should mention, that 30 would be the radius. And i have a clue - maybe it has to do something with the D3DFVF_ formats. I use XYZRHW, because if i don't the sphere doesn't appear. And in examples in sdk they would use either XYZ + Normal or just XYZ. Thanx.
#include <Windows.h>
#include <mmsystem.h>
#include <d3dx9.h>
#include <fstream.h>
LPDIRECT3D9 g_pD3D = NULL;
LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL;
LPDIRECT3DINDEXBUFFER9 g_pIB = NULL;
struct CUSTOMVERTEX
{
FLOAT x, y, z,rhw;
DWORD color;
};
#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE)
HRESULT InitD3D( HWND hWnd )
{
if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
return E_FAIL;
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp, sizeof(d3dpp));
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8;
d3dpp.BackBufferHeight = 200;
d3dpp.BackBufferWidth = 320;
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;
}
g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
return S_OK;
}
HRESULT InitGeometry()
{
DWORD i=0;
DWORD g_Indices[4000];
CUSTOMVERTEX g_Vertices[4000];
FLOAT dB = 10, dL = 10, R = 30;
FLOAT B = -90, L = 0;
for(B = -90; B < 90; B+=dB)
for(L = 0; L < 360; L+=dL)
{
g_Vertices.x = R*cosf(B)*sinf(L);
g_Vertices.y = R*cosf(B)*cosf(L);
g_Vertices.z = R*sinf(B);
g_Vertices.rhw = 1.0f;
g_Vertices.color = D3DCOLOR_XRGB(0,0,255);
g_Indices = i;
++i;
g_Vertices.x = R*cosf(B+dB)*sinf(L);
g_Vertices.y = R*cosf(B+dB)*cosf(L);
g_Vertices.z = R*sinf(B+dB);
g_Vertices.rhw = 1.0f;
g_Vertices.color = D3DCOLOR_XRGB(0,255,0);
g_Indices = i;
++i;
g_Vertices.x = R*cosf(B)*sinf(L+dL);
g_Vertices.y = R*cosf(B)*cosf(L+dL);
g_Vertices.z = R*sinf(B);
g_Vertices.rhw = 1.0f;
g_Vertices.color = D3DCOLOR_XRGB(255,0,0);
g_Indices = i;
++i;
g_Vertices.x = R*cosf(B+dB)*sinf(L);
g_Vertices.y = R*cosf(B+dB)*cosf(L);
g_Vertices.z = R*sinf(B+dB);
g_Vertices.rhw = 1.0f;
g_Vertices.color = D3DCOLOR_XRGB(0,255,255);
g_Indices = i;
++i;
g_Vertices.x = R*cosf(B)*sinf(L+dL);
g_Vertices.y = R*cosf(B)*cosf(L+dL);
g_Vertices.z = R*sinf(B);
g_Vertices.rhw = 1.0f;
g_Vertices.color = D3DCOLOR_XRGB(255,0,0);
g_Indices = i;
++i;
g_Vertices.x = R*cosf(B+dB)*sinf(L+dL);
g_Vertices.y = R*cosf(B+dB)*cosf(L+dL);
g_Vertices.z = R*sinf(B+dB);
g_Vertices.rhw = 1.0f;
g_Vertices.color = D3DCOLOR_XRGB(255,255,0);
g_Indices = i;
++i;
}
if( FAILED( g_pd3dDevice->CreateVertexBuffer( 4000*sizeof(CUSTOMVERTEX),
0, D3DFVF_CUSTOMVERTEX,
D3DPOOL_DEFAULT, &g_pVB, NULL)))
{
return E_FAIL;
}
VOID* pVertices;
if( FAILED( g_pVB->Lock( 0, sizeof(g_Vertices), (void**)&pVertices, 0 )))
return E_FAIL;
memcpy( pVertices, g_Vertices, sizeof(g_Vertices) );
g_pVB->Unlock();
//----------------------------------------------------------------------
g_pd3dDevice->CreateIndexBuffer(4000*sizeof(int), 0, D3DFMT_INDEX16
,D3DPOOL_DEFAULT, &g_pIB, NULL);
VOID* pIndices;
if( FAILED( g_pIB->Lock( 0,
sizeof(g_Indices),
&pIndices,
0 )))
return E_FAIL;
memcpy( pIndices, g_Indices, sizeof(g_Indices) );
g_pIB->Unlock();
return S_OK;
}
VOID Cleanup()
{
if( g_pVB != NULL )
g_pVB->Release();
if( g_pd3dDevice != NULL )
g_pd3dDevice->Release();
if( g_pD3D != NULL )
g_pD3D->Release();
}
VOID SetupMatrices()
{
D3DXMATRIXA16 matWorld;
D3DXVECTOR3 vEyePt( -40.0f, -40.0f,4.0f );
D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f );
D3DXVECTOR3 vUpVec( 0.0f, 4.0f, 0.0f );
D3DXMATRIXA16 matView;
D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );
}
VOID Render()
{
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,0), 1.0f, 0 );
if( SUCCEEDED( g_pd3dDevice->BeginScene()))
{
SetupMatrices();
g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX );
g_pd3dDevice->SetIndices(g_pIB);
g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, 3888, 0, 1296);//1296..3888
g_pd3dDevice->EndScene();
}
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
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 );
}
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,
GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
"D3D", NULL };
RegisterClassEx( &wc );
HWND hWnd = CreateWindow( "D3D", "D_3_D",
WS_OVERLAPPEDWINDOW, 100, 100, 255, 255,
GetDesktopWindow(), NULL, wc.hInstance, NULL );
if( SUCCEEDED( InitD3D( hWnd ) ) )
{
if( SUCCEEDED( InitGeometry() ) )
{
ShowWindow( hWnd, SW_SHOWDEFAULT );
UpdateWindow( hWnd );
MSG msg;
ZeroMemory( &msg, sizeof(msg) );
while( msg.message!=WM_QUIT )
{
if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
Render();
}
}
}
UnregisterClass( "D3D", wc.hInstance );
return 0;
}
