Tutorial05 Dx10

Tutorial 05 - DXSDK - Animando cubos

Neste tutorial ocorre a animação de dois cubos. O intuito principal dele é mostrar como usar o buffer de profundidade para que os cubos sejam desenhados apropriadamente na tela

// Esta aplicação demonstra animação usando transformações de matriz
 
#include <windows.h>
#include <d3d10.h>
#include <d3dx10.h>
 
struct SimpleVertex{
    D3DXVECTOR3 Pos;
    D3DXVECTOR4 Color;
};
 
HINSTANCE g_hInst = NULL;
HWND g_hWnd = NULL;
D3D10_DRIVER_TYPE g_driverType = D3D10_DRIVER_TYPE_NULL;
ID3D10Device*    g_pd3dDevice = NULL;
IDXGISwapChain*    g_pSwapChain = NULL;
ID3D10RenderTargetView*    g_pRenderTargetView = NULL;
ID3D10Texture2D*    g_pDepthStencil = NULL;
ID3D10DepthStencilView*    g_pDepthStencilView = NULL;
ID3D10Effect*    g_pEffect = NULL;
ID3D10EffectTechnique*    g_pTechnique = NULL;
ID3D10InputLayout*    g_pVertexLayout = NULL;
ID3D10Buffer*    g_pVertexBuffer = NULL;
ID3D10Buffer*    g_pIndexBuffer = NULL;
ID3D10EffectMatrixVariable* g_pWorldVariable = NULL;
ID3D10EffectMatrixVariable* g_pViewVariable = NULL;
ID3D10EffectMatrixVariable* g_pProjectionVariable = NULL;
D3DXMATRIX    g_World1;
D3DXMATRIX    g_World2;
D3DXMATRIX    g_View;
D3DXMATRIX    g_Projection;
 
HRESULT InitWindow( HINSTANCE hInstance, int nCmdShow );
HRESULT InitDevice();
void CleanupDevice();
LRESULT CALLBACK WndProc( HWND, UINT, WPARAM, LPARAM );
void Render();
 
// Ponto de entrada para o programa. Inicializa tudo e entra em um loop de processamento de
// mensagem. Tempo ocioso é usado para renderizar a cena
int WINAPI wWinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow ){
    if( FAILED( InitWindow( hInstance, nCmdShow ) ) )
        return 0;
 
    if( FAILED( InitDevice() ) ){
        CleanupDevice();
        return 0;
    }
 
    // Loop principal de mensagens
    MSG msg = {0};
    while( WM_QUIT != msg.message ){
        if( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) ){
            TranslateMessage( &msg );
            DispatchMessage( &msg );
        } else {
            Render();
        }
    }
 
    return (int) msg.wParam;
}
 
// Registra classe e cria janela
HRESULT InitWindow( HINSTANCE hInstance, int nCmdShow ){
    // Registra a classe
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof( WNDCLASSEX );
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    //wcex.hIcon = LoadIcon( hInstance, ( LPCTSTR )IDI_TUTORIAL1 );
    wcex.hIcon = NULL;
    wcex.hCursor = LoadCursor( NULL, IDC_ARROW );
    wcex.hbrBackground = ( HBRUSH )( COLOR_WINDOW + 1 );
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = L"TutorialWindowClass";
    //wcex.hIconSm = LoadIcon( hInstance, ( LPCTSTR )IDI_TUTORIAL1 );
    wcex.hIconSm = NULL;
 
    if( !RegisterClassEx( &wcex ) )
        return E_FAIL;
 
    // Cria a janela
    g_hInst = hInstance;
    RECT rc = { 0, 0, 640, 480 };
    AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );
    g_hWnd = CreateWindow( L"TutorialWindowClass", L"Direct3D 10 Tutorial 5",
        WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top,
        NULL, NULL, hInstance, NULL );
 
    if( !g_hWnd )
        return E_FAIL;
 
    ShowWindow( g_hWnd, nCmdShow );
 
    return S_OK;
}
 
// Chamado toda vez que a aplicação recebe uma mensagem
LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam ){
    PAINTSTRUCT ps;
    HDC hdc;
 
    switch( message ){
        case WM_PAINT:
            hdc = BeginPaint( hWnd, &ps );
            EndPaint( hWnd, &ps );    
            break;
        case WM_DESTROY:
            PostQuitMessage( 0 );
            break;
 
        default:
            return DefWindowProc( hWnd, message, wParam, lParam );
    }
 
    return 0;
}
 
// Cria o dispositivo Direct3D e a cadeia de troca
HRESULT InitDevice(){
    HRESULT hr = S_OK;
 
    RECT rc;
    GetClientRect( g_hWnd, &rc );
    UINT width = rc.right - rc.left;
    UINT height = rc.bottom - rc.top;
 
    UINT createDeviceFlags = 0;
 
#ifdef _DEBUG
    createDeviceFlags |= D3D10_CREATE_DEVICE_DEBUG;
#endif
 
    D3D10_DRIVER_TYPE driverTypes[] = {
        D3D10_DRIVER_TYPE_HARDWARE,
        D3D10_DRIVER_TYPE_REFERENCE
    };
 
    UINT numDriverTypes = sizeof( driverTypes ) / sizeof( driverTypes[0] );
    DXGI_SWAP_CHAIN_DESC sd;
    ZeroMemory( &sd, sizeof( sd ) );
    sd.BufferCount = 1;
    sd.BufferDesc.Width = width;
    sd.BufferDesc.Height = height;
    sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
    sd.BufferDesc.RefreshRate.Numerator = 60;
    sd.BufferDesc.RefreshRate.Denominator = 1;
    sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
    sd.OutputWindow = g_hWnd;
    sd.SampleDesc.Count = 1;
    sd.SampleDesc.Quality = 0;
    sd.Windowed = TRUE;
 
    for( UINT driverTypeIndex = 0; driverTypeIndex < numDriverTypes; driverTypeIndex++ ){
        g_driverType = driverTypes[driverTypeIndex];
        hr = D3D10CreateDeviceAndSwapChain( NULL, g_driverType, NULL, createDeviceFlags,
            D3D10_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice );
 
        if( SUCCEEDED( hr ) )
            break;
    }
 
    if( FAILED( hr ) )
        return hr;
 
    // cria uma visão de renderização alvo (Render Target)
    ID3D10Texture2D* pBackBuffer;
    hr = g_pSwapChain->GetBuffer( 0, __uuidof( ID3D10Texture2D ), (LPVOID *) &pBackBuffer );
 
    if( FAILED( hr ) )
        return hr;
 
    hr = g_pd3dDevice->CreateRenderTargetView( pBackBuffer, NULL, &g_pRenderTargetView );
    pBackBuffer->Release();
 
    if( FAILED( hr ) )
        return hr;
 
    // Cria textura stencil de profundidade
    D3D10_TEXTURE2D_DESC descDepth;
    descDepth.Width = width;
    descDepth.Height = height;
    descDepth.MipLevels = 1;
    descDepth.ArraySize = 1;
    descDepth.Format = DXGI_FORMAT_D32_FLOAT;
    descDepth.SampleDesc.Count = 1;
    descDepth.SampleDesc.Quality = 0;
    descDepth.Usage = D3D10_USAGE_DEFAULT;
    descDepth.BindFlags = D3D10_BIND_DEPTH_STENCIL;
    descDepth.CPUAccessFlags = descDepth.MiscFlags = 0;
    hr = g_pd3dDevice->CreateTexture2D( &descDepth, NULL, &g_pDepthStencil );
 
    if( FAILED( hr ) )
        return hr;
 
    // Cria a visão stencil de profundidade
    D3D10_DEPTH_STENCIL_VIEW_DESC descDSV;
    descDSV.Format = descDepth.Format;
    descDSV.ViewDimension = D3D10_DSV_DIMENSION_TEXTURE2D;
    descDSV.Texture2D.MipSlice = 0;
 
    hr = g_pd3dDevice->CreateDepthStencilView( g_pDepthStencil, &descDSV, &g_pDepthStencilView );
    pBackBuffer->Release();
 
    if( FAILED( hr ) )
        return hr;
 
    g_pd3dDevice->OMSetRenderTargets( 1, & g_pRenderTargetView, g_pDepthStencilView );
 
    // Configure o viewport
    D3D10_VIEWPORT vp;
    vp.Width = width;
    vp.Height = height;
    vp.MinDepth = 0.0f;
    vp.MaxDepth = 1.0f;
    vp.TopLeftX = vp.TopLeftY = 0;
    g_pd3dDevice->RSSetViewports( 1, &vp );
 
    //Cria o efeito
    DWORD dwShaderFlags = D3D10_SHADER_ENABLE_STRICTNESS;
#if defined( DEBUG ) || defined( _DEBUG )
    // Configure a opção D3D10_SHADER_DEBUG para embutir informação de debug nos shaders.
    // Configurar esta opção melhora a debugação do shader, mas ainda permite aos
    // shaders serem otimizados e executarem da maneira que eles executarão na 
    // configuração release deste programa
    dwShaderFlags |= D3D10_SHADER_DEBUG;
#endif
 
    hr = D3DX10CreateEffectFromFile( L"..\\Tutorial05.fx", NULL, NULL, "fx_4_0", dwShaderFlags, 0,
        g_pd3dDevice, NULL, NULL, &g_pEffect, NULL, NULL );
 
    if( FAILED( hr ) ){
        MessageBox( g_hWnd, L"O arquivo fx não pôde ser localizado. Por favor execute este executável do diretório que contém o arquivo FX", 
            L"Erro", MB_OK );
 
        return hr;
    }
 
    // Obtem a técnica
    g_pTechnique = g_pEffect->GetTechniqueByName( "Render" );
 
    // Obtém as variáveis
    g_pWorldVariable = g_pEffect->GetVariableByName( "World" )->AsMatrix();
    g_pViewVariable = g_pEffect->GetVariableByName( "View" )->AsMatrix();
    g_pProjectionVariable = g_pEffect->GetVariableByName( "Projection" )->AsMatrix();
 
    // Defina o leiaute de entrada
    D3D10_INPUT_ELEMENT_DESC layout[] = {
        { "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA },
        { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA },
    };
    UINT numElements = sizeof( layout ) / sizeof( layout[0] );
 
    // Cria o leiaute de entrada
    D3D10_PASS_DESC PassDesc;
    g_pTechnique->GetPassByIndex( 0 )->GetDesc( &PassDesc );
    hr = g_pd3dDevice->CreateInputLayout( layout, numElements, PassDesc.pIAInputSignature,
        PassDesc.IAInputSignatureSize, &g_pVertexLayout );
 
    if( FAILED( hr ) )
        return hr;
 
    // Configure o leiaute de entrada
    g_pd3dDevice->IASetInputLayout( g_pVertexLayout );
 
    // Crie o buffer de vértice
    SimpleVertex vertices[] = {
        { D3DXVECTOR3( -1.0f, 1.0f, -1.0f ), D3DXVECTOR4( 0.0f, 0.0f, 1.0f, 1.0f ) },
        { D3DXVECTOR3( 1.0f, 1.0f, -1.0f ), D3DXVECTOR4( 0.0f, 1.0f, 0.0f, 1.0f ) },
        { D3DXVECTOR3( 1.0f, 1.0f, 1.0f ), D3DXVECTOR4( 0.0f, 1.0f, 1.0f, 1.0f ) },
        { D3DXVECTOR3( -1.0f, 1.0f, 1.0f ), D3DXVECTOR4( 1.0f, 0.0f, 0.0f, 1.0f ) },
        { D3DXVECTOR3( -1.0f, -1.0f, -1.0f ), D3DXVECTOR4( 1.0f, 0.0f, 1.0f, 1.0f ) },
        { D3DXVECTOR3( 1.0f, -1.0f, -1.0f ), D3DXVECTOR4( 1.0f, 1.0f, 0.0f, 1.0f ) },
        { D3DXVECTOR3( 1.0f, -1.0f, 1.0f ), D3DXVECTOR4( 1.0f, 1.0f, 1.0f, 1.0f ) },
        { D3DXVECTOR3( -1.0f, -1.0f, 1.0f ), D3DXVECTOR4( 0.0f, 0.0f, 0.0f, 1.0f ) },
    };
    D3D10_BUFFER_DESC bd;
    bd.Usage = D3D10_USAGE_DEFAULT;
    bd.ByteWidth = sizeof( SimpleVertex ) * 8;
    bd.BindFlags = D3D10_BIND_VERTEX_BUFFER;
    bd.CPUAccessFlags = 0;
    bd.MiscFlags = 0;
    D3D10_SUBRESOURCE_DATA InitData;
    InitData.pSysMem = vertices;
    hr = g_pd3dDevice->CreateBuffer( &bd, &InitData, &g_pVertexBuffer );
 
    if( FAILED( hr ) )
        return hr;
 
    // Configure o buffer de vértice
    UINT stride = sizeof( SimpleVertex );
    UINT offset = 0;
    g_pd3dDevice->IASetVertexBuffers( 0,1, &g_pVertexBuffer, &stride, &offset );
 
    // Cria o buffer de índice
    DWORD indices[] = {
        3,1,0,
        2,1,3,
 
        0,5,4,
        1,5,0,
 
        3,4,7,
        0,4,3,
 
        1,6,5,
        2,6,1,
 
        2,7,6,
        3,7,2,
 
        6,4,5,
        7,4,6,
    };
 
    bd.Usage = D3D10_USAGE_DEFAULT;
    bd.ByteWidth = sizeof( DWORD ) * 36;    // 36 vértices necessários para 12 triângulos em uma lista de triângulos
    bd.BindFlags = D3D10_BIND_INDEX_BUFFER;
    bd.CPUAccessFlags = bd.MiscFlags = 0;
    InitData.pSysMem = indices;
    hr = g_pd3dDevice->CreateBuffer( &bd, &InitData, &g_pIndexBuffer );
    if( FAILED( hr ) )
        return hr;
 
    // Configura o buffer de índice
    g_pd3dDevice->IASetIndexBuffer( g_pIndexBuffer, DXGI_FORMAT_R32_UINT, 0 );
 
    // Configure a topologia primitiva
    g_pd3dDevice->IASetPrimitiveTopology( D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST );
 
    // Inicialize a matriz do mundo
    D3DXMatrixIdentity( &g_World1 );
    D3DXMatrixIdentity( &g_World2 );
 
    // Inicialize a matriz visão
    D3DXVECTOR3 Eye( 0.0f, 1.0f, -10.0f );
    D3DXVECTOR3 At( 0.0f, 1.0f, 0.0f );
    D3DXVECTOR3 Up( 0.0f, 1.0f, 0.0f );
    D3DXMatrixLookAtLH( &g_View, &Eye, &At, &Up );
 
    // Inicializa a matriz de projeção
    D3DXMatrixPerspectiveFovLH( &g_Projection, (float) D3DX_PI * 0.25f, width / (FLOAT) height, 0.1f, 100.0f );
 
    return TRUE;
}
 
// Renderiza um quadro
void Render(){
    // Atualize nosso tempo
    static float t = 0.0f;
    if( g_driverType == D3D10_DRIVER_TYPE_REFERENCE ){
        t += (float) D3DX_PI * 0.0125f;
    } else {
        static DWORD dwTimeStart = 0;
        DWORD dwTimeCur = GetTickCount();
        if( dwTimeStart == 0 )
            dwTimeStart = dwTimeCur;
        t = ( dwTimeCur - dwTimeStart ) / 1000.0f;
    }
 
    // Primeiro cubo: Rotacione ao redor da origem
    D3DXMatrixRotationY( &g_World1, t );
 
    // Segundo cubo: Rotacione ao redor da origem
    D3DXMATRIX mTranslate;
    D3DXMATRIX mOrbit;
    D3DXMATRIX mSpin;
    D3DXMATRIX mScale;
    D3DXMatrixRotationZ( &mSpin, -t );
    D3DXMatrixRotationY( &mOrbit, -t * 2.0f );
    D3DXMatrixTranslation( &mTranslate, -4.0f, 0.0f, 0.0f );
    D3DXMatrixScaling( &mScale, 0.3f, 0.3f, 0.3f );
 
    D3DXMatrixMultiply( &g_World2, &mScale, &mSpin );
    D3DXMatrixMultiply( &g_World2, &g_World2, &mTranslate );
    D3DXMatrixMultiply( &g_World2, &g_World2, &mOrbit );
 
    // Limpe o buffer de trás
    float ClearColor[4] = {0.0f, 0.125f, 0.3f, 1.0f};    // vermelho, verde, azul, alfa
    g_pd3dDevice->ClearRenderTargetView( g_pRenderTargetView, ClearColor );
 
    // limpe o buffer de profundidade para 1.0 (profundidade máxima)
    g_pd3dDevice->ClearDepthStencilView( g_pDepthStencilView, D3D10_CLEAR_DEPTH, 1.0f, 0 );
 
    // Atualize as variáveis para o primeiro cubo
    g_pWorldVariable->SetMatrix( (float* )&g_World1 );
    g_pViewVariable->SetMatrix( (float* )&g_View );
    g_pProjectionVariable->SetMatrix( (float* )&g_Projection );
 
    // Renderize o primeiro cubo
    D3D10_TECHNIQUE_DESC techDesc;    
    g_pTechnique->GetDesc( &techDesc );
    for( UINT p = 0; p < techDesc.Passes; ++p ){
        g_pTechnique->GetPassByIndex( p )->Apply( 0 );
        g_pd3dDevice->DrawIndexed( 36, 0, 0 );    // 36 vértices necessários para 12 triângulos em uma lista de triângulos
    }
 
    // Atualize as variáveis para o segundo cubo
    g_pWorldVariable->SetMatrix( (float* )&g_World2 );
    g_pViewVariable->SetMatrix( (float* )&g_View );
    g_pProjectionVariable->SetMatrix( (float* )&g_Projection );
 
    // Renderize o segundo cubo
    for( UINT p = 0; p < techDesc.Passes; ++p ){
        g_pTechnique->GetPassByIndex( p )->Apply( 0 );
        g_pd3dDevice->DrawIndexed( 36, 0, 0 );    // 36 vértices necessários para 12 triângulos em uma lista de triângulos
    }
 
    // Apresenta a informação renderizada no buffer de trás para o buffer da frente (a tela)
    g_pSwapChain->Present(0,0);
}
 
// Limpa os objetos que nós criamos
void CleanupDevice(){
    if( g_pd3dDevice ) g_pd3dDevice->ClearState();
 
    if( g_pVertexBuffer ) g_pVertexBuffer->Release();
    if( g_pIndexBuffer ) g_pIndexBuffer->Release();
    if( g_pVertexLayout ) g_pVertexLayout->Release();
    if( g_pEffect ) g_pEffect->Release();
    if( g_pRenderTargetView ) g_pRenderTargetView->Release();
    if( g_pSwapChain ) g_pSwapChain->Release();
    if( g_pd3dDevice ) g_pd3dDevice->Release();
}

Este tutorial usa o mesmo arquivo de efeito que o anterior:

//--------------------------------------------------------------------------------------
// File: Tutorial05.fx
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//--------------------------------------------------------------------------------------
 
//--------------------------------------------------------------------------------------
// Constant Buffer Variables
//--------------------------------------------------------------------------------------
matrix World;
matrix View;
matrix Projection;
 
//--------------------------------------------------------------------------------------
struct VS_INPUT
{
    float4 Pos : POSITION;
    float4 Color : COLOR;
};
 
struct PS_INPUT
{
    float4 Pos : SV_POSITION;
    float4 Color : COLOR;
};
 
//--------------------------------------------------------------------------------------
// Vertex Shader
//--------------------------------------------------------------------------------------
PS_INPUT VS( VS_INPUT input )
{
    PS_INPUT output = (PS_INPUT)0;
    output.Pos = mul( input.Pos, World );
    output.Pos = mul( output.Pos, View );
    output.Pos = mul( output.Pos, Projection );
    output.Color = input.Color;
 
    return output;
}
 
//--------------------------------------------------------------------------------------
// Pixel Shader
//--------------------------------------------------------------------------------------
float4 PS( PS_INPUT input) : SV_Target
{
    return input.Color;
}
 
//--------------------------------------------------------------------------------------
technique10 Render
{
    pass P0
    {
        SetVertexShader( CompileShader( vs_4_0, VS() ) );
        SetGeometryShader( NULL );
        SetPixelShader( CompileShader( ps_4_0, PS() ) );
    }
}
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