第10章 キャラクタの制御

このページはゲームループの基礎講座シリーズの１つです。
今回は第10章の「キャラクタの制御」について説明します。(戻る)

キャラクタの移動制御

// 画面内に移動制御
GetClientRect( hWnd, &rc );

if ( nFaceX < rc.left ){
    nFaceX = (rc.left);
    MessageBeep( MB_OK );
}
else if ( nFaceX > (rc.right - nFaceW) ){
    nFaceX = (rc.right - nFaceW);
    MessageBeep( MB_OK );
}
if ( nFaceY < rc.top ){
    nFaceY = (rc.top);
    MessageBeep( MB_OK );
}
else if ( nFaceY > (rc.bottom - nFaceH) ){
    nFaceY = (rc.bottom - nFaceH);
    MessageBeep( MB_OK );
}

プロシージャ関数に組み込む

//------------------------------------------------
// ウインドウのプロシージャ関数(OK)
//------------------------------------------------
static LRESULT CALLBACK mainWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    static HDC      hFaceChip;
    static LONG     nFaceW;
    static LONG     nFaceH;
    static LONG     nFaceX;
    static LONG     nFaceY;
    static LONG     nFaceSpeed;
    
    switch ( uMsg ){
        CASE WM_CREATE:
            nFaceSpeed  = 16;
            nFaceW      = 32;
            nFaceH      = 32;
            hFaceChip   = funcCreateMemDC( hWnd, nFaceW, nFaceH );
            funcFaceImage( hFaceChip, nFaceW, nFaceH );
        CASE WM_CLOSE:
            DeleteDC( hFaceChip );
            DestroyWindow( hWnd );
        CASE WM_DESTROY:
            PostQuitMessage( 0 );
        CASE WM_PAINT:
        {
            PAINTSTRUCT     ps;
            HDC             hDC;
            
            hDC = BeginPaint( hWnd, &ps );
            /*
            描画処理
            */
            EndPaint( hWnd, &ps );
        }
        CASE WM_KEYDOWN:
        {
            HDC     hDC;
            RECT    rc;
            
            switch ( wParam ){
                // 矢印キー
                CASE VK_UP:         nFaceY -= nFaceSpeed;
                CASE VK_DOWN:       nFaceY += nFaceSpeed;
                CASE VK_LEFT:       nFaceX -= nFaceSpeed;
                CASE VK_RIGHT:      nFaceX += nFaceSpeed;
                // テンキー
                CASE VK_NUMPAD1:    nFaceY += nFaceSpeed; nFaceX -= nFaceSpeed;
                CASE VK_NUMPAD2:    nFaceY += nFaceSpeed;
                CASE VK_NUMPAD3:    nFaceY += nFaceSpeed; nFaceX += nFaceSpeed;
                CASE VK_NUMPAD4:    nFaceX -= nFaceSpeed;
                CASE VK_NUMPAD5:    nFaceY += nFaceSpeed;
                CASE VK_NUMPAD6:    nFaceX += nFaceSpeed;
                CASE VK_NUMPAD7:    nFaceY -= nFaceSpeed; nFaceX -= nFaceSpeed;
                CASE VK_NUMPAD8:    nFaceY -= nFaceSpeed;
                CASE VK_NUMPAD9:    nFaceY -= nFaceSpeed; nFaceX += nFaceSpeed;
                DEFAULT:            return 0;
            }
            // 画面内に移動制御
            GetClientRect( hWnd, &rc );
            
            if ( nFaceX < rc.left ){
                nFaceX = (rc.left);
                MessageBeep( MB_OK );
            }
            else if ( nFaceX > (rc.right - nFaceW) ){
                nFaceX = (rc.right - nFaceW);
                MessageBeep( MB_OK );
            }
            if ( nFaceY < rc.top ){
                nFaceY = (rc.top);
                MessageBeep( MB_OK );
            }
            else if ( nFaceY > (rc.bottom - nFaceH) ){
                nFaceY = (rc.bottom - nFaceH);
                MessageBeep( MB_OK );
            }
            // キャラクタの描画
            hDC = GetDC( hWnd );
            TransparentBlt( hDC, nFaceX, nFaceY, nFaceW, nFaceH, hFaceChip, 0, 0, nFaceW, nFaceH, RGB(0x00,0x00,0x00) );
            ReleaseDC( hWnd, hDC );
        }
        CASE WM_ENDSESSION:         PostMessage( hWnd, WM_CLOSE, 0, 0 );
        CASE WM_LBUTTONDOWN:        SendMessage( hWnd, WM_NCLBUTTONDOWN, HTCAPTION, 0 );
        CASE WM_LBUTTONDBLCLK:      SetWindowPos( hWnd, HWND_TOPMOST,   0, 0, 0, 0, (SWP_NOMOVE|SWP_NOSIZE) );
        CASE WM_RBUTTONDBLCLK:      SetWindowPos( hWnd, HWND_NOTOPMOST, 0, 0, 0, 0, (SWP_NOMOVE|SWP_NOSIZE) );
        DEFAULT:                    return DefWindowProc( hWnd, uMsg, wParam, lParam );
    }
    return 0;
}

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