dxutcamera.cpp

声音和图片的加载功能,不过运行起来有点卡

    D3DXVECTOR3 vLocalUp    = D3DXVECTOR3(0,1,0);
    D3DXVECTOR3 vLocalAhead = D3DXVECTOR3(0,0,1);
    D3DXVec3TransformCoord( &vWorldUp, &vLocalUp, &mCameraRot );
    D3DXVec3TransformCoord( &vWorldAhead, &vLocalAhead, &mCameraRot );

    // Transform the position delta by the camera's rotation 
    D3DXVECTOR3 vPosDeltaWorld;
    if( !m_bEnableYAxisMovement )
    {
        // If restricting Y movement, do not include pitch
        // when transforming position delta vector.
        D3DXMatrixRotationYawPitchRoll( &mCameraRot, m_fCameraYawAngle, 0.0f, 0.0f );
    }
    D3DXVec3TransformCoord( &vPosDeltaWorld, &vPosDelta, &mCameraRot );

    // Move the eye position 
    m_vEye += vPosDeltaWorld;
    if( m_bClipToBoundary )
        ConstrainToBoundary( &m_vEye );

    // Update the lookAt position based on the eye position 
    m_vLookAt = m_vEye + vWorldAhead;

    // Update the view matrix
    D3DXMatrixLookAtLH( &m_mView, &m_vEye, &m_vLookAt, &vWorldUp );

    D3DXMatrixInverse( &m_mCameraWorld, NULL, &m_mView );
}


//--------------------------------------------------------------------------------------
// Enable or disable each of the mouse buttons for rotation drag.
//--------------------------------------------------------------------------------------
void CFirstPersonCamera::SetRotateButtons( bool bLeft, bool bMiddle, bool bRight, bool bRotateWithoutButtonDown )
{
    m_nActiveButtonMask = ( bLeft ? MOUSE_LEFT_BUTTON : 0 ) |
                          ( bMiddle ? MOUSE_MIDDLE_BUTTON : 0 ) |
                          ( bRight ? MOUSE_RIGHT_BUTTON : 0 );
    m_bRotateWithoutButtonDown = bRotateWithoutButtonDown;
}


//--------------------------------------------------------------------------------------
// Constructor 
//--------------------------------------------------------------------------------------
CModelViewerCamera::CModelViewerCamera()
{
    D3DXMatrixIdentity( &m_mWorld );
    D3DXMatrixIdentity( &m_mModelRot );
    D3DXMatrixIdentity( &m_mModelLastRot );    
    D3DXMatrixIdentity( &m_mCameraRotLast );    
    m_vModelCenter = D3DXVECTOR3(0,0,0);
    m_fRadius    = 5.0f;
    m_fDefaultRadius = 5.0f;
    m_fMinRadius = 1.0f;
    m_fMaxRadius = FLT_MAX;
    m_bLimitPitch = false;
    m_bEnablePositionMovement = false;
    m_bAttachCameraToModel = false;

    m_nRotateModelButtonMask  = MOUSE_LEFT_BUTTON;
    m_nZoomButtonMask         = MOUSE_WHEEL;
    m_nRotateCameraButtonMask = MOUSE_RIGHT_BUTTON;
    m_bDragSinceLastUpdate    = true;
}




//--------------------------------------------------------------------------------------
// Update the view matrix & the model's world matrix based 
//       on user input & elapsed time
//--------------------------------------------------------------------------------------
VOID CModelViewerCamera::FrameMove( FLOAT fElapsedTime )
{
    if( IsKeyDown(m_aKeys[CAM_RESET]) )
        Reset();

    // If no dragged has happend since last time FrameMove is called,
    // and no camera key is held down, then no need to handle again.
    if( !m_bDragSinceLastUpdate && 0 == m_cKeysDown )
        return;
    m_bDragSinceLastUpdate = false;

    //// If no mouse button is held down, 
    //// Get the mouse movement (if any) if the mouse button are down
    //if( m_nCurrentButtonMask != 0 ) 
    //    UpdateMouseDelta( fElapsedTime );

    GetInput( m_bEnablePositionMovement, m_nCurrentButtonMask != 0, true, false );

    // Get amount of velocity based on the keyboard input and drag (if any)
    UpdateVelocity( fElapsedTime );

    // Simple euler method to calculate position delta
    D3DXVECTOR3 vPosDelta = m_vVelocity * fElapsedTime;

    // Change the radius from the camera to the model based on wheel scrolling
    if( m_nMouseWheelDelta && m_nZoomButtonMask == MOUSE_WHEEL )
        m_fRadius -= m_nMouseWheelDelta * m_fRadius * 0.1f / 120.0f;
    m_fRadius = __min( m_fMaxRadius, m_fRadius );
    m_fRadius = __max( m_fMinRadius, m_fRadius );
    m_nMouseWheelDelta = 0;

    // Get the inverse of the arcball's rotation matrix
    D3DXMATRIX mCameraRot;
    D3DXMatrixInverse( &mCameraRot, NULL, m_ViewArcBall.GetRotationMatrix() );

    // Transform vectors based on camera's rotation matrix
    D3DXVECTOR3 vWorldUp, vWorldAhead;
    D3DXVECTOR3 vLocalUp    = D3DXVECTOR3(0,1,0);
    D3DXVECTOR3 vLocalAhead = D3DXVECTOR3(0,0,1);
    D3DXVec3TransformCoord( &vWorldUp, &vLocalUp, &mCameraRot );
    D3DXVec3TransformCoord( &vWorldAhead, &vLocalAhead, &mCameraRot );

    // Transform the position delta by the camera's rotation 
    D3DXVECTOR3 vPosDeltaWorld;
    D3DXVec3TransformCoord( &vPosDeltaWorld, &vPosDelta, &mCameraRot );

    // Move the lookAt position 
    m_vLookAt += vPosDeltaWorld;
    if( m_bClipToBoundary )
        ConstrainToBoundary( &m_vLookAt );

    // Update the eye point based on a radius away from the lookAt position
    m_vEye = m_vLookAt - vWorldAhead * m_fRadius;

    // Update the view matrix
    D3DXMatrixLookAtLH( &m_mView, &m_vEye, &m_vLookAt, &vWorldUp );

    D3DXMATRIX mInvView;
    D3DXMatrixInverse( &mInvView, NULL, &m_mView );
    mInvView._41 = mInvView._42 = mInvView._43 = 0;

    D3DXMATRIX mModelLastRotInv;
    D3DXMatrixInverse(&mModelLastRotInv, NULL, &m_mModelLastRot);

    // Accumulate the delta of the arcball's rotation in view space.
    // Note that per-frame delta rotations could be problematic over long periods of time.
    D3DXMATRIX mModelRot;
    mModelRot = *m_WorldArcBall.GetRotationMatrix();
    m_mModelRot *= m_mView * mModelLastRotInv * mModelRot * mInvView;

    if( m_ViewArcBall.IsBeingDragged() && m_bAttachCameraToModel && !IsKeyDown(m_aKeys[CAM_CONTROLDOWN]) )
    {
        // Attach camera to model by inverse of the model rotation
        D3DXMATRIX mCameraLastRotInv;
        D3DXMatrixInverse(&mCameraLastRotInv, NULL, &m_mCameraRotLast);
        D3DXMATRIX mCameraRotDelta = mCameraLastRotInv * mCameraRot; // local to world matrix
        m_mModelRot *= mCameraRotDelta;
    }
    m_mCameraRotLast = mCameraRot; 

    m_mModelLastRot = mModelRot;

    // Since we're accumulating delta rotations, we need to orthonormalize 
    // the matrix to prevent eventual matrix skew
    D3DXVECTOR3* pXBasis = (D3DXVECTOR3*) &m_mModelRot._11;
    D3DXVECTOR3* pYBasis = (D3DXVECTOR3*) &m_mModelRot._21;
    D3DXVECTOR3* pZBasis = (D3DXVECTOR3*) &m_mModelRot._31;
    D3DXVec3Normalize( pXBasis, pXBasis );
    D3DXVec3Cross( pYBasis, pZBasis, pXBasis );
    D3DXVec3Normalize( pYBasis, pYBasis );
    D3DXVec3Cross( pZBasis, pXBasis, pYBasis );

    // Translate the rotation matrix to the same position as the lookAt position
    m_mModelRot._41 = m_vLookAt.x;
    m_mModelRot._42 = m_vLookAt.y;
    m_mModelRot._43 = m_vLookAt.z;

    // Translate world matrix so its at the center of the model
    D3DXMATRIX mTrans;
    D3DXMatrixTranslation( &mTrans, -m_vModelCenter.x, -m_vModelCenter.y, -m_vModelCenter.z );
    m_mWorld = mTrans * m_mModelRot;
}


void CModelViewerCamera::SetDragRect( RECT &rc )
{
    CBaseCamera::SetDragRect( rc );

    m_WorldArcBall.SetOffset( rc.left, rc.top );
    m_ViewArcBall.SetOffset( rc.left, rc.top );
    SetWindow( rc.right - rc.left, rc.bottom - rc.top );
}


//--------------------------------------------------------------------------------------
// Reset the camera's position back to the default
//--------------------------------------------------------------------------------------
VOID CModelViewerCamera::Reset()
{
    CBaseCamera::Reset();

    D3DXMatrixIdentity( &m_mWorld );
    D3DXMatrixIdentity( &m_mModelRot );
    D3DXMatrixIdentity( &m_mModelLastRot );    
    D3DXMatrixIdentity( &m_mCameraRotLast );    

    m_fRadius = m_fDefaultRadius;
    m_WorldArcBall.Reset();
    m_ViewArcBall.Reset();
}


//--------------------------------------------------------------------------------------
// Override for setting the view parameters
//--------------------------------------------------------------------------------------
void CModelViewerCamera::SetViewParams( D3DXVECTOR3* pvEyePt, D3DXVECTOR3* pvLookatPt )
{
    CBaseCamera::SetViewParams( pvEyePt, pvLookatPt );

    // Propogate changes to the member arcball
    D3DXQUATERNION quat;
    D3DXMATRIXA16 mRotation;
    D3DXVECTOR3 vUp(0,1,0);
    D3DXMatrixLookAtLH( &mRotation, pvEyePt, pvLookatPt, &vUp );
    D3DXQuaternionRotationMatrix( &quat, &mRotation );
    m_ViewArcBall.SetQuatNow( quat );

    // Set the radius according to the distance
    D3DXVECTOR3 vEyeToPoint;
    D3DXVec3Subtract( &vEyeToPoint, pvLookatPt, pvEyePt );
    SetRadius( D3DXVec3Length( &vEyeToPoint ) );

    // View information changed. FrameMove should be called.
    m_bDragSinceLastUpdate = true;
}



//--------------------------------------------------------------------------------------
// Call this from your message proc so this class can handle window messages
//--------------------------------------------------------------------------------------
LRESULT CModelViewerCamera::HandleMessages( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    CBaseCamera::HandleMessages( hWnd, uMsg, wParam, lParam );

    if( ( (uMsg == WM_LBUTTONDOWN || uMsg == WM_LBUTTONDBLCLK ) && m_nRotateModelButtonMask & MOUSE_LEFT_BUTTON) ||
        ( (uMsg == WM_MBUTTONDOWN || uMsg == WM_MBUTTONDBLCLK ) && m_nRotateModelButtonMask & MOUSE_MIDDLE_BUTTON) ||
        ( (uMsg == WM_RBUTTONDOWN || uMsg == WM_RBUTTONDBLCLK ) && m_nRotateModelButtonMask & MOUSE_RIGHT_BUTTON) )
    {
        int iMouseX = (short)LOWORD(lParam);
        int iMouseY = (short)HIWORD(lParam);
        m_WorldArcBall.OnBegin( iMouseX, iMouseY );
    }

    if( ( (uMsg == WM_LBUTTONDOWN || uMsg == WM_LBUTTONDBLCLK ) && m_nRotateCameraButtonMask & MOUSE_LEFT_BUTTON) ||
        ( (uMsg == WM_MBUTTONDOWN || uMsg == WM_MBUTTONDBLCLK ) && m_nRotateCameraButtonMask & MOUSE_MIDDLE_BUTTON) ||
        ( (uMsg == WM_RBUTTONDOWN || uMsg == WM_RBUTTONDBLCLK ) && m_nRotateCameraButtonMask & MOUSE_RIGHT_BUTTON) )
    {
        int iMouseX = (short)LOWORD(lParam);
        int iMouseY = (short)HIWORD(lParam);
        m_ViewArcBall.OnBegin( iMouseX, iMouseY );
    }

    if( uMsg == WM_MOUSEMOVE )
    {
        int iMouseX = (short)LOWORD(lParam);
        int iMouseY = (short)HIWORD(lParam);
        m_WorldArcBall.OnMove( iMouseX, iMouseY );
        m_ViewArcBall.OnMove( iMouseX, iMouseY );
    }

    if( (uMsg == WM_LBUTTONUP && m_nRotateModelButtonMask & MOUSE_LEFT_BUTTON) ||
        (uMsg == WM_MBUTTONUP && m_nRotateModelButtonMask & MOUSE_MIDDLE_BUTTON) ||
        (uMsg == WM_RBUTTONUP && m_nRotateModelButtonMask & MOUSE_RIGHT_BUTTON) )
    {
        m_WorldArcBall.OnEnd();
    }

    if( (uMsg == WM_LBUTTONUP && m_nRotateCameraButtonMask & MOUSE_LEFT_BUTTON) ||
        (uMsg == WM_MBUTTONUP && m_nRotateCameraButtonMask & MOUSE_MIDDLE_BUTTON) ||
        (uMsg == WM_RBUTTONUP && m_nRotateCameraButtonMask & MOUSE_RIGHT_BUTTON) )
    {
        m_ViewArcBall.OnEnd();
    }

    if( uMsg == WM_CAPTURECHANGED )
    {
        if( (HWND)lParam != hWnd )
        {
            if( (m_nRotateModelButtonMask & MOUSE_LEFT_BUTTON) ||
                (m_nRotateModelButtonMask & MOUSE_MIDDLE_BUTTON) ||
                (m_nRotateModelButtonMask & MOUSE_RIGHT_BUTTON) )
            {
                m_WorldArcBall.OnEnd();
            }
        
            if( (m_nRotateCameraButtonMask & MOUSE_LEFT_BUTTON) ||
                (m_nRotateCameraButtonMask & MOUSE_MIDDLE_BUTTON) ||
                (m_nRotateCameraButtonMask & MOUSE_RIGHT_BUTTON) )
            {
                m_ViewArcBall.OnEnd();
            }
        }
    }

    if( uMsg == WM_LBUTTONDOWN ||
        uMsg == WM_LBUTTONDBLCLK ||
        uMsg == WM_MBUTTONDOWN ||
        uMsg == WM_MBUTTONDBLCLK ||
        uMsg == WM_RBUTTONDOWN ||
        uMsg == WM_RBUTTONDBLCLK ||
        uMsg == WM_LBUTTONUP ||
        uMsg == WM_MBUTTONUP ||
        uMsg == WM_RBUTTONUP ||
        uMsg == WM_MOUSEWHEEL ||
        uMsg == WM_MOUSEMOVE )
    {
        m_bDragSinceLastUpdate = true;
    }

    return FALSE;
}



//--------------------------------------------------------------------------------------
// D3D9
IDirect3DDevice9* CDXUTDirectionWidget::s_pd3d9Device = NULL;
ID3DXEffect*      CDXUTDirectionWidget::s_pD3D9Effect = NULL;
ID3DXMesh*        CDXUTDirectionWidget::s_pD3D9Mesh = NULL;
// D3D10
ID3D10Device*     CDXUTDirectionWidget::s_pd3d10Device = NULL;
ID3D10Effect*     CDXUTDirectionWidget::s_pD3D10Effect = NULL;
ID3D10InputLayout* CDXUTDirectionWidget::s_pVertexLayout = NULL;
ID3D10EffectTechnique* CDXUTDirectionWidget::s_pRenderTech = NULL;
ID3D10EffectVectorVariable* CDXUTDirectionWidget::g_pMaterialDiffuseColor = NULL;
ID3D10EffectVectorVariable* CDXUTDirectionWidget::g_pLightDir = NULL;  
ID3D10EffectMatrixVariable* CDXUTDirectionWidget::g_pmWorld = NULL;
ID3D10EffectMatrixVariable* CDXUTDirectionWidget::g_pmWorldViewProjection = NULL; 

//--------------------------------------------------------------------------------------
CDXUTDirectionWidget::CDXUTDirectionWidget()
{
    m_fRadius = 1.0f;
    m_vDefaultDir = D3DXVECTOR3(0,1,0);
    m_vCurrentDir = m_vDefaultDir;
    m_nRotateMask = MOUSE_RIGHT_BUTTON;

    D3DXMatrixIdentity( &m_mView );
    D3DXMatrixIdentity( &m_mRot );
    D3DXMatrixIdentity( &m_mRotSnapshot );
}


//--------------------------------------------------------------------------------------
HRESULT CDXUTDirectionWidget::StaticOnD3D9CreateDevice( IDirect3DDevice9* pd3dDevice )
{
    HRESULT hr;

    s_pd3d9Device = pd3dDevice;
   
    const char* g_strBuffer = 
    "float4 g_MaterialDiffuseColor;      // Material's diffuse color\r\n"
    "float3 g_LightDir;                  // Light's direction in world space\r\n"
    "float4x4 g_mWorld;                  // World matrix for object\r\n"
    "float4x4 g_mWorldViewProjection;    // World * View * Projection matrix\r\n"
    "\r\n"
    "struct VS_OUTPUT\r\n"
    "{\r\n"
    "    float4 Position   : POSITION;   // vertex position\r\n"
    "    float4 Diffuse    : COLOR0;     // vertex diffuse color\r\n"
    "};\r\n"
    "\r\n"
    "VS_OUTPUT RenderWith1LightNoTextureVS( float4 vPos : POSITION,\r\n"
    "                                       float3 vNormal : NORMAL )\r\n"
    "{\r\n"