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Quellcode

d3ddev->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 1);

Quellcode

d3ddev->DrawPrimitive(D3DPT_LINELIST, 0, 1);

C-/C++-Quelltext

// include the basic windows header files and the Direct3D header file

#include <windows.h>
#include <windowsx.h>
#include <d3d9.h>

// define the screen resolution and keyboard macros

#define SCREEN_WIDTH 800
#define SCREEN_HEIGHT 600
#define KEY_DOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define KEY_UP(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)

// include the Direct3D Library file

#pragma comment (lib, "d3d9.lib")

// global declarations

LPDIRECT3D9 d3d;    // the pointer to our Direct3D interface

LPDIRECT3DDEVICE9 d3ddev;    // the pointer to the device class

LPDIRECT3DVERTEXBUFFER9 v_buffer = NULL;    // the pointer to the vertex buffer


// function prototypes

void initD3D(HWND hWnd);    // sets up and initializes Direct3D

void render_frame(void);    // renders a single frame

void cleanD3D(void);    // closes Direct3D and releases memory

void init_graphics(void);    // 3D declarations


struct CUSTOMVERTEX {FLOAT X, Y, Z, RHW; DWORD COLOR;};
#define CUSTOMFVF (D3DFVF_XYZRHW | D3DFVF_DIFFUSE)

// the WindowProc function prototype

LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);


// the entry point for any Windows program

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
    HWND hWnd;
    WNDCLASSEX wc;

    ZeroMemory(&wc, sizeof(WNDCLASSEX));

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.lpszClassName = "WindowClass";

    RegisterClassEx(&wc);

    hWnd = CreateWindowEx(NULL,
                          "WindowClass",
                          "Our Direct3D Program",
                          WS_OVERLAPPEDWINDOW,
                          0, 0,
                          SCREEN_WIDTH, SCREEN_HEIGHT,
                          NULL,
                          NULL,
                          hInstance,
                          NULL);

    ShowWindow(hWnd, nCmdShow);

    // set up and initialize Direct3D

    initD3D(hWnd);

    // enter the main loop:


    MSG msg;

    while(TRUE)
    {
        while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }

        if(msg.message == WM_QUIT)
            break;

        render_frame();

        // check the 'escape' key

        if(KEY_DOWN(VK_ESCAPE))
            PostMessage(hWnd, WM_DESTROY, 0, 0);
    }

    // clean up DirectX and COM

    cleanD3D();

    return msg.wParam;
}


// this is the main message handler for the program

LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch(message)
    {
        case WM_DESTROY:
            {
                PostQuitMessage(0);
                return 0;
            } break;
    }

    return DefWindowProc (hWnd, message, wParam, lParam);
}


// this function initializes and prepares Direct3D for use

void initD3D(HWND hWnd)
{
    d3d = Direct3DCreate9(D3D_SDK_VERSION);

    D3DPRESENT_PARAMETERS d3dpp;

    ZeroMemory(&d3dpp, sizeof(d3dpp));
    d3dpp.Windowed = TRUE;
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpp.hDeviceWindow = hWnd;
    d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8;
    d3dpp.BackBufferWidth = SCREEN_WIDTH;
    d3dpp.BackBufferHeight = SCREEN_HEIGHT;

    // create a device class using this information and the info from the d3dpp stuct

    d3d->CreateDevice(D3DADAPTER_DEFAULT,
                      D3DDEVTYPE_HAL,
                      hWnd,
                      D3DCREATE_SOFTWARE_VERTEXPROCESSING,
                      &d3dpp,
                      &d3ddev);

    init_graphics();    // call the function to initialize the triangle

}


// this is the function used to render a single frame

void render_frame(void)
{
    d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 255, 255), 1.0f, 0);

    d3ddev->BeginScene();

        // select which vertex format we are using

        d3ddev->SetFVF(CUSTOMFVF);

        // select the vertex buffer to display

        d3ddev->SetStreamSource(0, v_buffer, 0, sizeof(CUSTOMVERTEX));

        // copy the vertex buffer to the back buffer

        d3ddev->DrawPrimitive(D3DPT_LINELIST, 0, 3);

    d3ddev->EndScene();

    d3ddev->Present(NULL, NULL, NULL, NULL);
}


// this is the function that cleans up Direct3D and COM

void cleanD3D(void)
{
    v_buffer->Release();    // close and release the vertex buffer

    d3ddev->Release();    // close and release the 3D device

    d3d->Release();    // close and release Direct3D

}


// this is the function that puts the 3D models into video RAM

void init_graphics(void)
{
    // create the vertices using the CUSTOMVERTEX struct

    CUSTOMVERTEX vertices[] =
    {
        { 400.0f, 100.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(255, 0, 0), },
        { 650.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 0, 255), },
        { 150.0f, 500.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 255, 0), },
    };

    // create a vertex buffer interface called v_buffer

    d3ddev->CreateVertexBuffer(3*sizeof(CUSTOMVERTEX),
                               0,
                               CUSTOMFVF,
                               D3DPOOL_MANAGED,
                               &v_buffer,
                               NULL);

    VOID* pVoid;    // a void pointer


    // lock v_buffer and load the vertices into it

    v_buffer->Lock(0, 0, (void**)&pVoid, 0);
    memcpy(pVoid, vertices, sizeof(vertices));
    v_buffer->Unlock();
}