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BumpLens.cpp
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2001-10-31
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496 lines
//-----------------------------------------------------------------------------
// File: BumpLens.cpp
//
// Desc: Code to simulate a magnifying glass using bumpmapping.
//
// Note: Based on a sample from the Matrox web site
//
// Copyright (c) 2000-2001 Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#define STRICT
#include <tchar.h>
#include <math.h>
#include <stdio.h>
#include "D3DX8.h"
#include "D3DApp.h"
#include "D3DFont.h"
#include "D3DUtil.h"
#include "DXUtil.h"
#include "resource.h"
//-----------------------------------------------------------------------------
// Function prototypes and global (or static) variables
//-----------------------------------------------------------------------------
inline DWORD F2DW( FLOAT f ) { return *((DWORD*)&f); }
struct BUMPVERTEX // Vertex type used for bumpmap lens effect
{
D3DXVECTOR3 p;
FLOAT tu1, tv1;
FLOAT tu2, tv2;
};
struct BACKGROUNDVERTEX // Vertex type used for rendering background
{
D3DXVECTOR4 p;
DWORD color;
FLOAT tu, tv;
};
#define D3DFVF_BUMPVERTEX (D3DFVF_XYZ|D3DFVF_TEX2)
#define D3DFVF_BACKGROUNDVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE|D3DFVF_TEX1)
//-----------------------------------------------------------------------------
// Name: class CMyD3DApplication
// Desc: Application class. The base class (CD3DApplication) provides the
// generic functionality needed in all Direct3D samples. CMyD3DApplication
// adds functionality specific to this sample program.
//-----------------------------------------------------------------------------
class CMyD3DApplication : public CD3DApplication
{
CD3DFont* m_pFont;
LPDIRECT3DVERTEXBUFFER8 m_pBackgroundVB;
LPDIRECT3DVERTEXBUFFER8 m_pLensVB;
FLOAT m_fLensX;
FLOAT m_fLensY;
LPDIRECT3DTEXTURE8 m_pBumpMapTexture;
LPDIRECT3DTEXTURE8 m_pBackgroundTexture;
BOOL m_bDeviceValidationFailed;
HRESULT CreateBumpMap( UINT iWidth, UINT iHeight );
HRESULT ConfirmDevice( D3DCAPS8*, DWORD, D3DFORMAT );
protected:
HRESULT OneTimeSceneInit();
HRESULT InitDeviceObjects();
HRESULT RestoreDeviceObjects();
HRESULT InvalidateDeviceObjects();
HRESULT DeleteDeviceObjects();
HRESULT Render();
HRESULT FrameMove();
HRESULT FinalCleanup();
public:
CMyD3DApplication();
};
//-----------------------------------------------------------------------------
// Name: WinMain()
// Desc: Entry point to the program. Initializes everything, and goes into a
// message-processing loop. Idle time is used to render the scene.
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
CMyD3DApplication d3dApp;
if( FAILED( d3dApp.Create( hInst ) ) )
return 0;
return d3dApp.Run();
}
//-----------------------------------------------------------------------------
// Name: CMyD3DApplication()
// Desc: Application constructor. Sets attributes for the app.
//-----------------------------------------------------------------------------
CMyD3DApplication::CMyD3DApplication()
{
m_strWindowTitle = _T("BumpLens: Lens Effect Using BumpMapping");
m_bUseDepthBuffer = FALSE;
m_pFont = new CD3DFont( _T("Arial"), 12, D3DFONT_BOLD );
m_pBumpMapTexture = NULL;
m_pBackgroundTexture = NULL;
m_pBackgroundVB = NULL;
m_pLensVB = NULL;
m_bDeviceValidationFailed = FALSE;
}
//-----------------------------------------------------------------------------
// Name: OneTimeSceneInit()
// Desc: Called during initial app startup, this function performs all the
// permanent initialization.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::OneTimeSceneInit()
{
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: FrameMove()
// Desc: Called once per frame, the call is the entry point for animating
// the scene.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::FrameMove()
{
// Get a triangle wave between -1 and 1
m_fLensX = 2 * fabsf( 2 * ( (m_fTime/2) - floorf(m_fTime/2) ) - 1 ) - 1;
// Get a regulated sine wave between -1 and 1
m_fLensY = 2 * fabsf( sinf( m_fTime ) ) - 1;
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: Render()
// Desc: Called once per frame, the call is the entry point for 3d
// rendering. This function sets up render states, clears the
// viewport, and renders the scene.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::Render()
{
// Begin the scene
if( FAILED( m_pd3dDevice->BeginScene() ) )
return S_OK;
// Render the background
m_pd3dDevice->SetTexture( 0, m_pBackgroundTexture );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLOROP, D3DTOP_DISABLE );
m_pd3dDevice->SetVertexShader( D3DFVF_BACKGROUNDVERTEX );
m_pd3dDevice->SetStreamSource( 0, m_pBackgroundVB, sizeof(BACKGROUNDVERTEX) );
m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2 );
// Render the lens
m_pd3dDevice->SetTexture( 0, m_pBumpMapTexture );
m_pd3dDevice->SetTexture( 1, m_pBackgroundTexture );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_BUMPENVMAP );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_CURRENT );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_DISABLE );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_BUMPENVMAT00, F2DW(0.2f) );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_BUMPENVMAT01, F2DW(0.0f) );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_BUMPENVMAT10, F2DW(0.0f) );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_BUMPENVMAT11, F2DW(0.2f) );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_BUMPENVLSCALE, F2DW(1.0f) );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_BUMPENVLOFFSET, F2DW(0.0f) );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLOROP, D3DTOP_SELECTARG1 );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLORARG1, D3DTA_TEXTURE );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLORARG2, D3DTA_CURRENT );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_ALPHAOP, D3DTOP_DISABLE );
// Generate texture coords depending on objects camera space position
D3DXMATRIX mat;
mat._11 = 0.5f; mat._12 = 0.0f;
mat._21 = 0.0f; mat._22 =-0.5f;
mat._31 = 0.0f; mat._32 = 0.0f;
mat._41 = 0.5f; mat._42 = 0.5f;
// Scale-by-z here
D3DXMATRIX matView, matProj;
m_pd3dDevice->GetTransform( D3DTS_VIEW, &matView );
m_pd3dDevice->GetTransform( D3DTS_PROJECTION, &matProj );
D3DXVECTOR3 vEyePt( matView._41, matView._42, matView._43 );
FLOAT z = D3DXVec3Length( &vEyePt );
mat._11 *= ( matProj._11 / ( matProj._33 * z + matProj._34 ) );
mat._22 *= ( matProj._22 / ( matProj._33 * z + matProj._34 ) );
m_pd3dDevice->SetTransform( D3DTS_TEXTURE1, &mat );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_TEXTURETRANSFORMFLAGS, D3DTTFF_COUNT2 );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_TEXCOORDINDEX, D3DTSS_TCI_CAMERASPACEPOSITION | 1);
// Position the lens
D3DXMATRIX matWorld;
D3DXMatrixTranslation( &matWorld, 0.7f * (1000.0f-256.0f)*m_fLensX,
0.7f * (1000.0f-256.0f)*m_fLensY,
0.0f );
m_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld );
m_pd3dDevice->SetVertexShader( D3DFVF_BUMPVERTEX );
m_pd3dDevice->SetStreamSource( 0, m_pLensVB, sizeof(BUMPVERTEX) );
// Verify that the texture operations are possible on the device
DWORD dwNumPasses;
if( FAILED( m_pd3dDevice->ValidateDevice( &dwNumPasses ) ) )
{
// The right thing to do when device validation fails is to try
// a different rendering technique. This sample just warns the user.
m_bDeviceValidationFailed = TRUE;
}
// Render the lens
m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2 );
// Output statistics
m_pFont->DrawText( 2, 0, D3DCOLOR_ARGB(255,255,255,0), m_strFrameStats );
m_pFont->DrawText( 2, 20, D3DCOLOR_ARGB(255,255,255,0), m_strDeviceStats );
if( m_bDeviceValidationFailed )
{
m_pFont->DrawText( 2, 40, D3DCOLOR_ARGB(255,255,0,0),
_T("Warning: Device validation failed. Rendering may not look right.") );
}
// End the scene.
m_pd3dDevice->EndScene();
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: CreateBumpmap()
// Desc: Create a bump map texture and fill its content to BUMPDUDV format
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::CreateBumpMap( UINT iWidth, UINT iHeight )
{
// Create the bumpmap's surface and texture objects
if( FAILED( m_pd3dDevice->CreateTexture( iWidth, iHeight, 1, 0,
D3DFMT_V8U8, D3DPOOL_MANAGED, &m_pBumpMapTexture ) ) )
{
return E_FAIL;
}
// Fill the bumpmap texels to simulate a lens
D3DLOCKED_RECT d3dlr;
m_pBumpMapTexture->LockRect( 0, &d3dlr, 0, 0 );
DWORD dwDstPitch = (DWORD)d3dlr.Pitch;
BYTE* pDst = (BYTE*)d3dlr.pBits;
UINT mid = iWidth/2;
for( DWORD y0 = 0; y0 < iHeight; y0++ )
{
CHAR* pDst = (CHAR*)d3dlr.pBits + y0*d3dlr.Pitch;
for( DWORD x0 = 0; x0 < iWidth; x0++ )
{
DWORD x1 = ( (x0==iWidth-1) ? x0 : x0+1 );
DWORD y1 = ( (x0==iHeight-1) ? y0 : y0+1 );
FLOAT fDistSq00 = (FLOAT)( (x0-mid)*(x0-mid) + (y0-mid)*(y0-mid) );
FLOAT fDistSq01 = (FLOAT)( (x1-mid)*(x1-mid) + (y0-mid)*(y0-mid) );
FLOAT fDistSq10 = (FLOAT)( (x0-mid)*(x0-mid) + (y1-mid)*(y1-mid) );
FLOAT v00 = ( fDistSq00 > (mid*mid) ) ? 0.0f : sqrtf( (mid*mid) - fDistSq00 );
FLOAT v01 = ( fDistSq01 > (mid*mid) ) ? 0.0f : sqrtf( (mid*mid) - fDistSq01 );
FLOAT v10 = ( fDistSq10 > (mid*mid) ) ? 0.0f : sqrtf( (mid*mid) - fDistSq10 );
FLOAT iDu = (128/D3DX_PI)*atanf(v00-v01); // The delta-u bump value
FLOAT iDv = (128/D3DX_PI)*atanf(v00-v10); // The delta-v bump value
*pDst++ = (CHAR)(iDu);
*pDst++ = (CHAR)(iDv);
}
}
m_pBumpMapTexture->UnlockRect(0);
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: InitDeviceObjects()
// Desc: Initialize scene objects
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::InitDeviceObjects()
{
m_pFont->InitDeviceObjects( m_pd3dDevice );
// Load the texture for the background image
if( FAILED( D3DUtil_CreateTexture( m_pd3dDevice, _T("Lake.bmp"),
&m_pBackgroundTexture ) ) )
return E_FAIL;
// Create the bump map texture
if( FAILED( CreateBumpMap( 256, 256 ) ) )
return E_FAIL;
// Create a square for rendering the background
if( FAILED( m_pd3dDevice->CreateVertexBuffer( 4*sizeof(BACKGROUNDVERTEX),
D3DUSAGE_WRITEONLY, D3DFVF_BACKGROUNDVERTEX,
D3DPOOL_MANAGED, &m_pBackgroundVB ) ) )
return E_FAIL;
// Create a square for rendering the lens
if( FAILED( m_pd3dDevice->CreateVertexBuffer( 4*sizeof(BUMPVERTEX),
D3DUSAGE_WRITEONLY, D3DFVF_BUMPVERTEX,
D3DPOOL_MANAGED, &m_pLensVB ) ) )
return E_FAIL;
BUMPVERTEX* vLens;
m_pLensVB->Lock( 0, 0, (BYTE**)&vLens, 0 );
vLens[0].p = D3DXVECTOR3(-256.0f,-256.0f, 0.0f );
vLens[1].p = D3DXVECTOR3(-256.0f, 256.0f, 0.0f );
vLens[2].p = D3DXVECTOR3( 256.0f,-256.0f, 0.0f );
vLens[3].p = D3DXVECTOR3( 256.0f, 256.0f, 0.0f );
vLens[0].tu1 = 0.0f; vLens[0].tv1 = 1.0f;
vLens[1].tu1 = 0.0f; vLens[1].tv1 = 0.0f;
vLens[2].tu1 = 1.0f; vLens[2].tv1 = 1.0f;
vLens[3].tu1 = 1.0f; vLens[3].tv1 = 0.0f;
m_pLensVB->Unlock();
m_bDeviceValidationFailed = FALSE;
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: RestoreDeviceObjects()
// Desc: Initialize scene objects
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::RestoreDeviceObjects()
{
m_pFont->RestoreDeviceObjects();
// Set the transform matrices
D3DXVECTOR3 vEyePt = D3DXVECTOR3( 0.0f, 0.0f, -2001.0f );
D3DXVECTOR3 vLookatPt = D3DXVECTOR3( 0.0f, 0.0f, 0.0f );
D3DXVECTOR3 vUpVec = D3DXVECTOR3( 0.0f, 1.0f, 0.0f );
D3DXMATRIX matWorld, matView, matProj;
D3DXMatrixIdentity( &matWorld );
D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
FLOAT fAspect = m_d3dsdBackBuffer.Width / (FLOAT)m_d3dsdBackBuffer.Height;
D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, fAspect, 1.0f, 3000.0f );
m_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld );
m_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );
m_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );
// Set any appropiate state
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MINFILTER, D3DTEXF_LINEAR );
m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MAGFILTER, D3DTEXF_LINEAR );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_ADDRESSU, D3DTADDRESS_CLAMP );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_ADDRESSV, D3DTADDRESS_CLAMP );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_MINFILTER, D3DTEXF_LINEAR );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_MAGFILTER, D3DTEXF_LINEAR );
m_pd3dDevice->SetTextureStageState( 1, D3DTSS_MIPFILTER, D3DTEXF_NONE );
// Size the background image
BACKGROUNDVERTEX* vBackground;
m_pBackgroundVB->Lock( 0, 0, (BYTE**)&vBackground, 0 );
for( UINT i=0; i<4; i ++ )
{
vBackground[i].p = D3DXVECTOR4( 0.0f, 0.0f, 0.9f, 1.0f );
vBackground[i].color = 0xffffffff;
}
vBackground[0].p.y = (FLOAT)m_d3dsdBackBuffer.Height;
vBackground[2].p.y = (FLOAT)m_d3dsdBackBuffer.Height;
vBackground[2].p.x = (FLOAT)m_d3dsdBackBuffer.Width;
vBackground[3].p.x = (FLOAT)m_d3dsdBackBuffer.Width;
vBackground[0].tu = 0.0f; vBackground[0].tv = 1.0f;
vBackground[1].tu = 0.0f; vBackground[1].tv = 0.0f;
vBackground[2].tu = 1.0f; vBackground[2].tv = 1.0f;
vBackground[3].tu = 1.0f; vBackground[3].tv = 0.0f;
m_pBackgroundVB->Unlock();
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: InvalidateDeviceObjects()
// Desc:
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::InvalidateDeviceObjects()
{
m_pFont->InvalidateDeviceObjects();
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: DeleteDeviceObjects()
// Desc: Called when the app is exiting, or the device is being changed,
// this function deletes any device dependent objects.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::DeleteDeviceObjects()
{
m_pFont->DeleteDeviceObjects();
SAFE_RELEASE( m_pBackgroundTexture );
SAFE_RELEASE( m_pBumpMapTexture );
SAFE_RELEASE( m_pBackgroundVB );
SAFE_RELEASE( m_pLensVB );
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: FinalCleanup()
// Desc: Called before the app exits, this function gives the app the chance
// to cleanup after itself.
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::FinalCleanup()
{
SAFE_DELETE( m_pFont );
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: ConfirmDevice()
// Desc: Called during device intialization, this code checks the device
// for some minimum set of capabilities
//-----------------------------------------------------------------------------
HRESULT CMyD3DApplication::ConfirmDevice( D3DCAPS8* pCaps, DWORD dwBehavior,
D3DFORMAT Format )
{
if( dwBehavior & D3DCREATE_PUREDEVICE )
return E_FAIL; // GetTransform doesn't work on PUREDEVICE
// Device must be able to do bumpmapping
if( 0 == ( pCaps->TextureOpCaps & D3DTEXOPCAPS_BUMPENVMAP ) )
return E_FAIL;
// Accept devices that can create D3DFMT_V8U8 textures
if( SUCCEEDED( m_pD3D->CheckDeviceFormat( pCaps->AdapterOrdinal,
pCaps->DeviceType, Format,
0, D3DRTYPE_TEXTURE,
D3DFMT_V8U8 ) ) )
return S_OK;
return E_FAIL;
}