3D编程-旋转的三角形

#include <d3d9.h>
#include <d3dx9.h>
#include <stdio.h>
#pragma comment(lib,"d3d9.lib")
#pragma comment(lib,"d3dx9.lib")
#pragma comment(lib,"winmm.lib")

#define KeyDown(vk_code) 	((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define Msg(info) 			MessageBox(NULL,info,"message",MB_OK)
#define ErrorMsg(info) 		MessageBox(NULL,info,"error",MB_ICONSTOP)
#define	DXRELOBJ(pObject)	if(pObject){pObject->Release();}

#define WND_CLASS "wndclass"
#define WND_TITLE "D3DApp Demo"
#define WND_WIDTH    400
#define WND_HEIGHT   300

HWND g_hwnd;
HINSTANCE g_hinst;

LPDIRECT3D9 g_d3d;
LPDIRECT3DDEVICE9 g_device;
LPDIRECT3DVERTEXBUFFER9 g_vb;

#define D3DFVF_CUSTOM (D3DFVF_XYZ|D3DFVF_DIFFUSE)
struct CustomVertex
{
float x,y,z;
long color;
};

bool InitGeometry()
{
CustomVertex triangle[]=
{
-1, -1, 0, 0xffff00,
1, -1, 0, 0xff0000,
0, 1, 0, 0x0000ff
};

if(FAILED(g_device->CreateVertexBuffer(sizeof(triangle), 0, D3DFVF_CUSTOM, D3DPOOL_DEFAULT, &g_vb, NULL)))
return false;

void * paddr;

if(FAILED(g_vb->Lock(0, 0, (void**)&paddr, 0)))
return false;

memcpy(paddr, triangle, sizeof(triangle));

g_vb->Unlock();

return true;
}

bool InitD3D()
{
if(NULL==(g_d3d = Direct3DCreate9(D3D_SDK_VERSION)))
return false;

D3DDISPLAYMODE d3dpm;
if(FAILED(g_d3d->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &d3dpm)))
return false;

D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp, sizeof(d3dpp));
d3dpp.Windowed = TRUE;
d3dpp.hDeviceWindow = g_hwnd;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = d3dpm.Format;

if(FAILED(g_d3d->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, g_hwnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_device)))
return false;

g_device->SetRenderState(D3DRS_LIGHTING, FALSE);
g_device->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);

return true;
}

bool InitApp()
{
if(!InitD3D() | !InitGeometry())
{
ErrorMsg("Unable to Initialize D3D !");
return false;
}

return true;
}

void Render()
{
g_device->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,0), 1.0f, 0);
g_device->BeginScene();

static D3DXMATRIX world,view,proj;

D3DXMatrixRotationY(&world, timeGetTime() / 500.0f);
g_device->SetTransform(D3DTS_WORLD, &world);

D3DXMatrixLookAtLH(&view,
&D3DXVECTOR3(0.0f, 0.0f, 4.0f),
&D3DXVECTOR3(0.0f, 0.0f, 0.0f),
&D3DXVECTOR3(0.0f, 1.0f, 0.0f));

g_device->SetTransform(D3DTS_VIEW, &view);

D3DXMatrixPerspectiveFovLH(&proj, D3DX_PI / 4.0f, WND_WIDTH/WND_HEIGHT, 1.0, 1000.0f);
g_device->SetTransform(D3DTS_PROJECTION, &proj);

g_device->SetStreamSource(0, g_vb, 0, sizeof(CustomVertex));
g_device->SetFVF(D3DFVF_CUSTOM);
g_device->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 1);

g_device->EndScene();
g_device->Present(NULL, NULL, NULL, NULL);
}

void ShutdownApp()
{
DXRELOBJ(g_vb);
DXRELOBJ(g_device);
DXRELOBJ(g_d3d);
}

LRESULT CALLBACK MsgProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
switch(msg)
{
case WM_DESTROY:
PostQuitMessage(0);
break;

default:
break;
}

return DefWindowProc(hwnd, msg, wparam, lparam);
}

int WINAPI WinMain(HINSTANCE hinst,HINSTANCE hprevinst, LPSTR cmdlint, INT show)
{
g_hinst = hinst;

WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_CLASSDC;
wcex.lpfnWndProc = MsgProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = GetModuleHandle(NULL);
wcex.hIcon = LoadIcon(NULL, IDC_APPSTARTING);
wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wcex.hCursor = LoadCursor( NULL, IDC_ARROW );
wcex.lpszClassName = WND_CLASS;
wcex.lpszMenuName = NULL;
wcex.hIconSm = LoadIcon(NULL, IDC_APPSTARTING);

if(!RegisterClassEx(&wcex))
{
ErrorMsg("RegisterClassEx failed!");
return 0;
}

g_hwnd = CreateWindow(WND_CLASS, WND_TITLE, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, WND_WIDTH, WND_HEIGHT,
NULL, NULL, hinst, NULL);

if(!g_hwnd)
return 0;

ShowWindow(g_hwnd, SW_SHOWNORMAL);
UpdateWindow(g_hwnd);

MSG msg={0};

if(!InitApp())
msg.message = WM_QUIT;

while(msg.message != WM_QUIT)
{
if(PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}

Render();
}

ShutdownApp();
UnregisterClass(WND_CLASS, wcex.hInstance);

return 0;
}