StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POc++ first person camera in directx
primarykey
Id
8049705
data
AcceptedAnswerId
8049888
AnswerCount
1
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2011-11-08T11:30:07.097
FavoriteCount
1
LastActivityDate
2011-11-08T12:00:14.370
LastEditDate
2011-11-08T12:00:14.370
LastEditorUserId
704114
OwnerUserId
704114
ParentId
0
PostTypeId
1
Score
0
ViewCount
1136
LastEditorDisplayName
text
Body
<p>m a beginner programmer and im creating a project which allows me to walk around rooms via a first person camera so far i have the buildings drawn etc but now im stuck and don't know how to make a first person camera to allow me to walk around could anyone point me towards a camera class i could use or some useful code? thanks in advance</p> <p>below is the code for one of my buildings but not my full project, its rotating so i could see what i was drawing. i want to be able to move forwards and backwards using the arrow keys and also left and right :)</p> <pre><code>#include <stdio.h> #include <d3d9.h> #include <d3dx9.h> #include <dinput.h> #include <math.h> const char TITLE[] = "game experimenting"; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE) //*****Direct 3D Initialization***** LPDIRECT3D9 g_pD3D = NULL; LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Buffer to hold vertices LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; //Direct Input References LPDIRECTINPUT8 m_pDIObject = NULL;//DirectInput object LPDIRECTINPUTDEVICE8 m_pDIKeyboardDevice = NULL;//keyboard device LPDIRECTINPUTDEVICE8 m_pDIMouseDevice = NULL;//mouse device LPDIRECTINPUTDEVICE8 m_pDIJoystickDevice = NULL;//joystick device //D3DXMATRIX Transformation Matrices D3DXMATRIX g_matProj; D3DXMATRIX g_matView; D3DXMATRIX g_matWorld; //********************** //****** Vertex Buffer Definition and Setting *** struct CUSTOMVERTEX { FLOAT x, y, z; // The position for the vertex DWORD color; // The vertex color }; int numberOfTriangles = 34; int numberOfVertecies = 3*numberOfTriangles; float scale = 1.0f; float doorHeight = 1.0f; float doorWidth = 0.25f; CUSTOMVERTEX g_Vertices[] = { // Y +Axis //Top Side Outer Wall { 1.0f, 1.0f,-1.0f, 0xffffffff, }, { 1.0f, 1.0f,1.0f, 0xffffffff, }, { -1.0f,1.0f, -1.0f, 0xffffffff,}, //Triangle { -1.0f,1.0f, 1.0f, 0xffffffff,}, { 1.0f, 1.0f, 1.0f, 0xffffffff, }, { -1.0f,1.0f, -1.0f, 0xffffffff,}, //Triangle //Top Side Inner Wall { 0.9f, 0.9f,-0.9f, 0x00ff0000, }, { 0.9f, 0.9f,0.9f, 0x00ff0000, }, { -0.9f,0.9f, -0.9f, 0x00ff0000,}, //Triangle { -0.9f,0.9f, 0.9f, 0x00ff0000,}, { 0.9f, 0.9f, 0.9f, 0x00ff0000, }, { -0.9f,0.9f, -0.9f, 0x00ff0000,}, //Triangle // X +Axis //Right Side Outer Wall { 1.0f, 1.0f,-1.0f, 0xffffffff, }, { 1.0f, 1.0f,1.0f, 0xffffffff, }, { 1.0f,-1.0f, -1.0f, 0xffffffff,}, /////Triangle { 1.0f,-1.0f, 1.0f, 0xffffffff,}, { 1.0f, 1.0f, 1.0f, 0xffffffff, }, { 1.0f,-1.0f, -1.0f, 0xffffffff,}, /////Triangle //Right Side Inner Wall { 0.9f, 0.9f,-0.9f, 0xff0000ff, }, { 0.9f, 0.9f,0.9f, 0xff0000ff, }, { 0.9f,-1.0f, -0.9f, 0xff0000ff,}, /////Triangle { 0.9f,-1.0f, 0.9f, 0xff0000ff,}, { 0.9f, 0.9f, 0.9f, 0xff0000ff, }, { 0.9f,-1.0f, -0.9f, 0xff0000ff,}, /////Triangle // X -Axis //Left Side Outer Wall {-1.0f, 1.0f,-1.0f, 0xffffffff, }, {-1.0f, 1.0f,1.0f, 0xffffffff, }, {-1.0f,-1.0f, -1.0f, 0xffffffff,}, /////Triangle {-1.0f,-1.0f, 1.0f, 0xffffffff,}, {-1.0f, 1.0f, 1.0f, 0xffffffff, }, {-1.0f,-1.0f, -1.0f, 0xffffffff,}, /////Triangle //Left Side Inner Wall {-0.9f, 0.9f,-0.9f, 0xff0000ff, }, {-0.9f, 0.9f,0.9f, 0xff0000ff, }, {-0.9f,-1.0f, -0.9f, 0xff0000ff,}, /////Triangle {-0.9f,-1.0f, 0.9f, 0xff0000ff,}, {-0.9f, 0.9f, 0.9f, 0xff0000ff, }, {-0.9f,-1.0f, -0.9f, 0xff0000ff,}, /////Triangle // Z +Axis //Back Outer Wall { 1.0f,-1.0f, 1.0f, 0xffffffff, }, { 1.0f, 1.0f, 1.0f, 0xffffffff, }, { -1.0f,-1.0f, 1.0f, 0xffffffff,}, /////Triangle { -1.0f,1.0f, 1.0f, 0xffffffff,}, { 1.0f, 1.0f, 1.0f, 0xffffffff, }, { -1.0f,-1.0f, 1.0f, 0xffffffff,}, /////Triangle //Back Inner Wall { 0.9f,-1.0f, 0.9f, 0xff0000ff, }, { 0.9f, 0.9f, 0.9f, 0xff0000ff, }, { -0.9f,-1.0f, 0.9f, 0xff0000ff,}, /////Triangle { -0.9f,0.9f, 0.9f, 0xff0000ff,}, { 0.9f, 0.9f, 0.9f, 0xff0000ff, }, { -0.9f,-1.0f, 0.9f, 0xff0000ff,}, /////Triangle // Z Negative Axis //Front Outer Wall Top1 { 1.0f,-1.0f+doorHeight, -1.0f, 0xffffffff, }, { 1.0f, 1.0f, -1.0f, 0xffffffff, }, { -1.0f,-1.0f+doorHeight, -1.0f, 0xffffffff,}, /////Triangle //Front Outer Wall Top2 { -1.0f, 1.0f, -1.0f, 0xffffffff, }, { 1.0f, 1.0f, -1.0f, 0xffffffff, }, { -1.0f,-1.0f+doorHeight, -1.0f, 0xffffffff,}, /////Triangle //Front Outer Wall Left1 { -1.0f,-1.0f+doorHeight, -1.0f, 0xffffffff,}, { -1.0f,-1.0f, -1.0f, 0xffffffff,}, { -1.0f+(scale-doorWidth),-1.0f, -1.0f, 0xffffffff,}, /////Triangle //Front Outer Wall Left2 { -1.0f,-1.0f+doorHeight, -1.0f, 0xffffffff,}, { -1.0f+(scale-doorWidth),-1.0f, -1.0f, 0xffffffff,}, { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffffffff,}, /////Triangle //Front Outer Wall Right1 { 1.0f,-1.0f+doorHeight, -1.0f, 0xffffffff,}, { 1.0f,-1.0f, -1.0f, 0xffffffff,}, { 1.0f-(scale-doorWidth),-1.0f, -1.0f, 0xffffffff,}, /////Triangle //Front Outer Wall Right2 { 1.0f,-1.0f+doorHeight, -1.0f, 0xffffffff,}, { 1.0f-(scale-doorWidth),-1.0f, -1.0f, 0xffffffff,}, { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffffffff,}, /////Triangle //Door Inner Edges Right of door 1 { 1.0f-(scale-doorWidth),-1.0f, -1.0f, 0xffff0099,}, { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffff0099,}, { 1.0f-(scale-doorWidth),-1.0f, -0.9f, 0xffff0099,}, /////Triangle //Door Inner Edges Right of door 2 { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffff0099,}, { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -0.9f, 0xffff0099,}, { 1.0f-(scale-doorWidth),-1.0f, -0.9f, 0xffff0099,}, /////Triangle //Door Inner Edges Left of door 1 { -1.0f+(scale-doorWidth),-1.0f, -1.0f, 0xffff0099,}, { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffff0099,}, { -1.0f+(scale-doorWidth),-1.0f, -0.9f, 0xffff0099,}, /////Triangle //Door Inner Edges Left of door 2 { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffff0099,}, { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -0.9f, 0xffff0099,}, { -1.0f+(scale-doorWidth),-1.0f, -0.9f, 0xffff0099,}, /////Triangle //Door Inner Edges Top Of Door 1 { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffff0099,}, { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffff0099,}, { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -0.9f, 0xffff0099,}, /////Triangle //Door Inner Edges Top Of Door 2 { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -0.9f, 0xffff0099,}, { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -1.0f, 0xffff0099,}, { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -0.9f, 0xffff0099,}, /////Triangle //FRONT Inner Wall Top1 { 0.9f,-1.0f+doorHeight, -0.9f, 0xff0000ff, }, { 0.9f, 1.0f, -0.9f, 0xff0000ff, }, { -0.9f,-1.0f+doorHeight, -0.9f, 0xff0000ff,}, /////Triangle //FRONT Inner Wall Top2 { -0.9f, 1.0f, -0.9f, 0xff0000ff, }, { 0.9f, 1.0f, -0.9f, 0xff0000ff, }, { -0.9f,-1.0f+doorHeight, -0.9f, 0xff0000ff,}, /////Triangle //FRONT Inner Wall Left1 { -0.9f,-1.0f+doorHeight, -0.9f, 0xff0000ff,}, { -0.9f,-1.0f, -0.9f, 0xff0000ff,}, { -1.0f+(scale-doorWidth),-1.0f, -0.9f, 0xff0000ff,}, /////Triangle //FRONT Inner Wall Left2 { -0.9f,-1.0f+doorHeight, -0.9f, 0xff0ff0ff,}, { -1.0f+(scale-doorWidth),-1.0f, -0.9f, 0xff0ff0ff,}, { -1.0f+(scale-doorWidth),-1.0f+doorHeight, -0.9f, 0xff0ff0ff,}, /////Triangle //FRONT Inner Wall Right1 { 0.9f,-1.0f+doorHeight, -0.9f, 0xff0ff0ff,}, { 0.9f,-1.0f, -0.9f, 0xff0ff0ff,}, { 1.0f-(scale-doorWidth),-1.0f, -0.9f, 0xff0ff0ff,}, /////Triangle //FRONT Inner Wall Right2 { 0.9f,-1.0f+doorHeight, -0.9f, 0xff0000ff,}, { 1.0f-(scale-doorWidth),-1.0f, -0.9f, 0xff0000ff,}, { 1.0f-(scale-doorWidth),-1.0f+doorHeight, -0.9f, 0xff0000ff,}, /////Triangle }; //******************************************************************* // Name: SetupMatrices() // Desc: Sets up the world, view, and projection transform matrices. //------------------------------------------------------------------- void SetupMatrices() { static float time = 0.0f; time += 10.0f; D3DXMatrixIdentity( &g_matWorld ); D3DXMatrixRotationYawPitchRoll( &g_matWorld, time/1000.0f, time/700.0f, time/850.0f ); g_pd3dDevice->SetTransform( D3DTS_WORLD, &g_matWorld ); D3DXMatrixLookAtLH( &g_matView, &D3DXVECTOR3( 0.0f, 0.0f,-5.0f ), &D3DXVECTOR3( 0.0f, 0.0f, 0.0f ), &D3DXVECTOR3( 0.0f, 1.0f, 0.0f ) ); g_pd3dDevice->SetTransform( D3DTS_VIEW, &g_matView ); D3DXMatrixPerspectiveLH(&g_matProj, 2.0f, 2.0f/1.5f, 1.0f, 10000.0f); g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &g_matProj ); } void TestForMouse() { DIMOUSESTATE mouseState; m_pDIMouseDevice->GetDeviceState(sizeof(mouseState), (LPVOID)&mouseState); if(mouseState.rgbButtons[0] & 0x80) // left mouse button down { } } //************************ MESSAGE HANDLER ************************** LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) { // this is the main message handler of the system PAINTSTRUCT ps; // used in WM_PAINT HDC hdc; // handle to a device context // what is the message switch(msg) { case WM_CREATE: { // do initialization stuff here return(0); } case WM_PAINT: { // validate the window hdc = BeginPaint(hwnd,&ps); EndPaint(hwnd,&ps); return(0); } case WM_KEYDOWN: { // Handle any non-accelerated key commands switch (wparam) { case VK_ESCAPE: case VK_F12: PostMessage(hwnd, WM_CLOSE, 0, 0); return (0); default: char message[15]; sprintf_s(message, "Key Pressed: %c", (char)wparam); MessageBox(NULL, message, "Key Pressed", MB_OK); } break; } case WM_DESTROY: { // kill the application PostQuitMessage(0); return(0); } default: break; } // end switch // process any messages that wasn't taken care of return (DefWindowProc(hwnd, msg, wparam, lparam)); } // end WinProc //********************* END OF MESSAGE HANDLER *********************** void InitializeDX(HWND hwnd) { if(!( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) ) MessageBox(hwnd,"Direct3d Create problem", NULL, NULL); D3DPRESENT_PARAMETERS d3dpp; ZeroMemory( &d3dpp, sizeof(d3dpp) ); d3dpp.Windowed = TRUE; d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; d3dpp.BackBufferFormat = D3DFMT_UNKNOWN; d3dpp.EnableAutoDepthStencil = TRUE; d3dpp.AutoDepthStencilFormat = D3DFMT_D16; if(FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice ) ) ) MessageBox(hwnd,"CreateDevice problem", NULL, NULL); //InitializeCircleArray(); //InitializeSquareArray(); //*************************** Create Vertex Buffer **************************** if( FAILED( g_pd3dDevice->CreateVertexBuffer( numberOfVertecies*sizeof(CUSTOMVERTEX), 0 /* Usage */, D3DFVF_CUSTOMVERTEX, D3DPOOL_MANAGED, &g_pVB, NULL ) ) ) MessageBox(hwnd,"Vertex Buffer problem",NULL,NULL); VOID* pVertices; if( FAILED( g_pVB->Lock( 0, sizeof(g_Vertices), (void**)&pVertices, 0 ) ) ) MessageBox(hwnd,"Vertex Lock Problem",NULL,NULL); memcpy( pVertices, g_Vertices, sizeof(g_Vertices) ); g_pVB->Unlock(); g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, TRUE); // turn on the z-buffer } void InitializeDI(HWND hwnd) { if(FAILED(DirectInput8Create(GetModuleHandle(NULL), DIRECTINPUT_VERSION, IID_IDirectInput8, (void**)&m_pDIObject, NULL))) MessageBox(hwnd,"DirectInput8Create() failed!",NULL,NULL); // Setup Mouse Input if(FAILED(m_pDIObject->CreateDevice(GUID_SysMouse, &m_pDIMouseDevice, NULL))) MessageBox(hwnd,"CreateDevice() failed!",NULL,NULL); if(FAILED(m_pDIMouseDevice->SetDataFormat(&c_dfDIMouse))) MessageBox(hwnd,"SetDataFormat() failed!",NULL,NULL); if(FAILED(m_pDIMouseDevice->SetCooperativeLevel(hwnd, DISCL_BACKGROUND | DISCL_NONEXCLUSIVE))) MessageBox(hwnd,"SetCooperativeLevel() failed!",NULL,NULL); if(FAILED(m_pDIMouseDevice->Acquire())) MessageBox(hwnd,"Acquire() failed!",NULL,NULL); } //**************************Render and display the scene*********************** void Render() { g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(0,0,0), 1.0f, 0 ); // Turn off D3D lighting, // providing our own vertex colours g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE ); // Turn off culling g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE ); // Begin the scene if( SUCCEEDED( g_pd3dDevice->BeginScene() ) ) { SetupMatrices(); // Rendering of scene objects can happen here g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) ); g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX ); //g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLEFAN, 0, 179 ); // 179 triangles from 181 vertices //g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, 2 ); g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, numberOfTriangles ); //1 triangle // End the scene g_pd3dDevice->EndScene(); } g_pd3dDevice->Present( NULL, NULL, NULL, NULL ); } //************************ WIN MAIN*********************** int WINAPI WinMain( HINSTANCE hinstance, HINSTANCE hprevinstance, LPSTR lpcmdline, int ncmdshow) { WNDCLASS winclass; // this will hold the class HWND hwnd; // generic window handle MSG msg; // generic message // first fill in the window class stucture winclass.style = CS_HREDRAW | CS_VREDRAW; winclass.lpfnWndProc = WindowProc; winclass.cbClsExtra = 0; winclass.cbWndExtra = 0; winclass.hInstance = hinstance; winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); winclass.hCursor = LoadCursor(NULL, IDC_ARROW); // winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); // winclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); winclass.hbrBackground = (HBRUSH)CreateSolidBrush(RGB(255, 0, 0)); winclass.lpszMenuName = NULL; winclass.lpszClassName = "DX9WinClass"; // register the window class if (!RegisterClass(&winclass)) return(0); // create the window if (!(hwnd = CreateWindow( "DX9WinClass", // class TITLE, // title WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, //Set the size of the window to the size of the screen 600, 400, //GetSystemMetrics(SM_CXSCREEN), //GetSystemMetrics(SM_CYSCREEN), NULL, // handle to parent NULL, // handle to menu hinstance, // instance NULL))) // creation parms return(0); InitializeDX(hwnd); InitializeDI(hwnd); // enter main event loop bool quit = false; while(!quit) { TestForMouse(); if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) { // test if this is a quit if (msg.message == WM_QUIT) quit = true; // translate any accelerator keys TranslateMessage(&msg); // send the message to the window proc DispatchMessage(&msg); } // end if else { Render(); } } // end while //Set Mouse Free Run Away Mouse m_pDIMouseDevice->Release(); // return to Windows like this return(msg.wParam); } // end WinMain //************************ END OF WIN MAIN ******************* </code></pre>
Tags
<c++><camera><directx><frame-rate>
Title
c++ first person camera in directx
singulars
PostAcceptedAnswerId
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USDK10
UserOwnerUserId
1. USDK10
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. PL
  singulars
  LinkTypeLinkTypeId
  LTLinked
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. VO
  singulars
  PostPostId
  POc++ first person camera in directx
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTDownMod
2. VO
  singulars
  PostPostId
  POc++ first person camera in directx
  UserUserId
  USDK10
  VoteTypeVoteTypeId
  VTFavorite
3. VO
  singulars
  PostPostId
  POc++ first person camera in directx
  UserUserId
  This table or related slice is empty.
  VoteTypeVoteTypeId
  VTUpMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.