// ============================================================================
// Filename: DOT3DINPUT.cpp
// Description: DirectInput Mouse and Dot3 Bumpmapping. This code corresponds
// to DirectX Techniques Series 1 tutorial 5.
//
// Created by wizard version 0.1 Beta.
//
// Found a bug in this code framework? Need some help? Come to www.32bits.co.uk
// for support, feedback and the best DirectX dev community on the net!
// ============================================================================
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <d3d8.h>
#include <d3dx8.h>
#include <dxerr8.h>
// Include helper functions.
#include "D3DFuncs.h"
#include "DIMouse.h"
// Function declarations
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow);
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam );
HRESULT AppInit();
HRESULT AppLoop();
HRESULT AppShutDown();
HRESULT Render();
// Globals required for all apps
static char szAppname[]="[32Bits.co.uk] DInput Mouse & Dot3 Bumpmap";
LPDIRECT3D8 g_pD3D;
LPDIRECT3DDEVICE8 g_pDevice;
HWND g_hWnd;
D3DCURRENTSETTINGS g_D3DSettings;
// Globals specifically for this app
LPDIRECT3DVERTEXBUFFER8 g_pVertexBuffer;
LPDIRECT3DTEXTURE8 g_pBumpMapTexture;
LPDIRECT3DTEXTURE8 g_pNormalMapTexture;
CDIMouse* g_pDIMouse;
// Change our normal vertex struct to include members for texturemapping...
typedef struct _tagSimpleTexMapVertex
{
float x,y,z;
D3DCOLOR dwDiffuse;
float tu,tv;
} SIMPLETEXMAPVERTEX;
// ...and update our FVF define to match.
#define FVF_SIMPLETEXMAPVERTEX (D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1)
// =====================================================================================
// Application code begins here
// =====================================================================================
// =====================================================================================
// Function Name: WinMain
// Purpose: Application entry point
// =====================================================================================
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wc;
ZeroMemory(&wc, sizeof(WNDCLASSEX));
wc.cbSize=sizeof(WNDCLASSEX); // size of the window struct in bytes
wc.style=CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // window styles to use
wc.lpfnWndProc=MsgProc; // function name of event handler
wc.hInstance=hInstance; // handle to this apps instance
wc.hbrBackground=(HBRUSH)GetStockObject(GRAY_BRUSH);// background colour of window
wc.hIcon= LoadIcon(NULL, IDI_APPLICATION); // icon for the app window
wc.hIconSm=LoadIcon(NULL, IDI_APPLICATION); // icon when minimized to taskbar
wc.hCursor=LoadCursor(NULL, IDC_ARROW); // cursor to use for this window
wc.lpszClassName=szAppname; // name for this class
// Register the window class
RegisterClassEx( &wc );
g_D3DSettings.m_nDeviceWidth=800;
g_D3DSettings.m_nDeviceHeight=600;
g_D3DSettings.m_fScreenAspect=(float)g_D3DSettings.m_nDeviceWidth / (float)g_D3DSettings.m_nDeviceHeight;
// Create the application's window
g_hWnd = CreateWindow(szAppname, szAppname, WS_OVERLAPPEDWINDOW, 10, 10,
g_D3DSettings.m_nDeviceWidth, g_D3DSettings.m_nDeviceHeight,
NULL, NULL, wc.hInstance, NULL );
// Show the window
ShowWindow(g_hWnd, nCmdShow);
UpdateWindow(g_hWnd);
if(FAILED(AppInit()))
{
UnregisterClass(szAppname, wc.hInstance);
return -1;
}
// Enter the message loop
MSG msg;
ZeroMemory(&msg, sizeof(msg));
int count=0;
while(msg.message != WM_QUIT)
{
if(PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
AppLoop();
}
}
AppShutDown();
UnregisterClass(szAppname, wc.hInstance);
return 0;
}
// =====================================================================================
// Function Name: MsgProc
// Purpose: Message handler for main app window
// =====================================================================================
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg )
{
case WM_KEYDOWN:
{
switch(wParam)
{
// Exit app on space or escape keypress
case VK_SPACE:
case VK_ESCAPE:
{
PostQuitMessage(0);
return 0;
}
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
default:
return DefWindowProc(hWnd, msg, wParam, lParam);
}
}
// =====================================================================================
// Function Name: AppInit
// Purpose: Initialisation for D3D and the app's global objects
// =====================================================================================
HRESULT AppInit()
{
HRESULT rslt=0;
g_pD3D=Direct3DCreate8(D3D_SDK_VERSION);
if(g_pD3D==NULL)
{
return D3DError(E_FAIL, __LINE__, __FILE__, "Failed to create a D3D8 object.");
}
// Populate our struct with how we want to set up D3D...
g_D3DSettings.m_bWindowed=TRUE;
g_D3DSettings.m_bMultiSampling=FALSE;
g_D3DSettings.m_D3DFormat=D3DFMT_X8R8G8B8;
// ...and pass it to our function to create the device!
rslt=InitDirect3DDevice(g_hWnd, g_D3DSettings, g_pD3D, &g_pDevice);
if(FAILED(rslt))
{
return E_FAIL;
}
// ===================================================================================
// Set up our Projection, View and World transformations
// ===================================================================================
// Create a matrix to store our Projection transform. Null all the fields.
D3DXMATRIX matProjection;
ZeroMemory(&matProjection, sizeof(matProjection));
// Use D3DX to create a left handed cartesian Field Of View transform
D3DXMatrixPerspectiveFovLH(&matProjection, D3DX_PI/4, g_D3DSettings.m_fScreenAspect,
1.0f, 100.0f);
// Tell D3D to use our Projection matrix for the projection transformation stage
rslt=g_pDevice->SetTransform(D3DTS_PROJECTION, &matProjection);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "Failed to set Projection Transform."); }
// Create a matrix to store our View transform. Null all the fields.
D3DXMATRIX matView;
ZeroMemory(&matView, sizeof(matView));
// Use D3DX to create a Look At matrix from eye, lookat and up vectors.
D3DXMatrixLookAtLH(&matView, &D3DXVECTOR3(0.0f, 0.0f, -5.0f),
&D3DXVECTOR3(0.0f, 0.0f, 0.0f),
&D3DXVECTOR3(0.0f, 1.0f, 0.0f));
// Tell D3D to use our View matrix for the view transformation stage
rslt=g_pDevice->SetTransform(D3DTS_VIEW, &matView);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "Failed to set View Transform."); }
// Create a matrix to store our World transform
D3DXMATRIX matWorld;
// Set the matrix to an identity matrix (one that makes no change)
D3DXMatrixIdentity(&matWorld);
// Tell D3D to use our World matrix for the world transformation stage
rslt=g_pDevice->SetTransform(D3DTS_WORLD, &matWorld);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "Failed to set World Transform."); }
// ===================================================================================
// Set up our scene states
// ===================================================================================
// Set our culling & lighting renderstates
g_pDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_CCW);
g_pDevice->SetRenderState(D3DRS_LIGHTING, FALSE);
// ===================================================================================
// Create the objects for this app
// ===================================================================================
// Create a quad for texturemapping the bumpmap onto, and assign each vertex a texcoord:
SIMPLETEXMAPVERTEX Quad[4];
Quad[0].x=-1.0f; Quad[0].y=-1.0f; Quad[0].z=0.0f;
Quad[0].tu=0.0f;
Quad[0].tv=1.0f;
Quad[0].dwDiffuse=D3DCOLOR_XRGB(255,255,255);
Quad[1].x=-1.0f; Quad[1].y=1.0f; Quad[1].z=0.0f;
Quad[1].tu=0.0f;
Quad[1].tv=0.0f;
Quad[1].dwDiffuse=D3DCOLOR_XRGB(255,255,255);
Quad[2].x=1.0f; Quad[2].y=-1.0f; Quad[2].z=0.0f;
Quad[2].tu=1.0f;
Quad[2].tv=1.0f;
Quad[2].dwDiffuse=D3DCOLOR_XRGB(255,255,255);
Quad[3].x=1.0f; Quad[3].y=1.0f; Quad[3].z=0.0f;
Quad[3].tu=1.0f;
Quad[3].tv=0.0f;
Quad[3].dwDiffuse=D3DCOLOR_XRGB(255,255,255);
// Next, create our vertex buffer using the properties of our custom struct and FVF
rslt=g_pDevice->CreateVertexBuffer(sizeof(Quad), 0, FVF_SIMPLETEXMAPVERTEX, D3DPOOL_DEFAULT,
&g_pVertexBuffer);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "CreateVertexBuffer() failed."); }
// Now lock the vertex buffer...
BYTE* pVerticeLock=0;
rslt=g_pVertexBuffer->Lock(0, sizeof(Quad), &pVerticeLock, 0);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "Failed to lock Vertex Buffer."); }
// ...and copy our array of vertices straight into it
CopyMemory(pVerticeLock, &Quad, sizeof(Quad));
// Remember to unlock the vertex buffer once we're done.
g_pVertexBuffer->Unlock();
// ===================================================================================
// Create our texture surface for texturemapping
// ===================================================================================
// Create the texture surface from the file
rslt=D3DXCreateTextureFromFileEx(g_pDevice, "bumpmap.png", 256, 256,
1, 0, D3DFMT_UNKNOWN, D3DPOOL_MANAGED,
D3DX_DEFAULT, D3DX_DEFAULT, 0, NULL, NULL,
&g_pBumpMapTexture);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "Could not create texture."); }
// Create a brand new texture to receive our normal map
rslt=D3DXCreateTexture(g_pDevice, 256, 256, 1, D3DX_DEFAULT, D3DFMT_A8R8G8B8,
D3DPOOL_DEFAULT, &g_pNormalMapTexture);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "Could not create texture 1"); }
// Calculate the normal map from the source png image, and write it to the normal map texture
rslt = D3DXComputeNormalMap(g_pNormalMapTexture, g_pBumpMapTexture, NULL, 0, D3DX_CHANNEL_RED, 1.0f);
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "Could not create normal map texture"); }
// ===================================================================================
// Initialise our DirectInput mouse
// ===================================================================================
// Create the mouse on the heap, we might want to kill it later.
g_pDIMouse = new CDIMouse;
g_pDIMouse->Initialise(g_hWnd, g_D3DSettings.m_nDeviceWidth, g_D3DSettings.m_nDeviceHeight);
return S_OK;
}
// =====================================================================================
// Function Name: AppLoop
// Purpose: Controls the flow of the app, called by the messageloop.
// =====================================================================================
HRESULT AppLoop()
{
// Update the mouse position
g_pDIMouse->Update();
return Render();
}
// =====================================================================================
// Function Name: AppShutDown
// Purpose: Called when the app exits. Releases all global COM interfaces.
// =====================================================================================
HRESULT AppShutDown()
{
// Don't forget to release the vertex buffer - it's a COM interface!
if(g_pVertexBuffer)
g_pVertexBuffer->Release();
if(g_pBumpMapTexture)
g_pBumpMapTexture->Release();
if(g_pNormalMapTexture)
g_pNormalMapTexture->Release();
// Mouse destructor handles the DirectInput deallocation
delete g_pDIMouse;
if(g_pDevice)
g_pDevice->Release();
if(g_pD3D)
g_pD3D->Release();
return S_OK;
}
// =====================================================================================
// Function Name: Render()
// Purpose: Main rendering function to perform D3D drawing
// =====================================================================================
HRESULT Render()
{
HRESULT rslt=NULL;
// ====================================================================================
// - Do all the usual checks to make sure we have the right pointers, etc...
// ====================================================================================
// Make sure we have a valid D3D Device
if(!g_pDevice) { return E_FAIL; }
// Return if the device is not ready
rslt=ValidateDevice(g_pDevice, g_D3DSettings);
// Clear the back buffer
if(g_pDIMouse->IsMouseButtonDown(DIMOUSE_LEFTBUTTON))
g_pDevice->Clear(0,0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(0,100,55), 1.0f, 0);
else
g_pDevice->Clear(0,0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(0,0,55), 1.0f, 0);
rslt=g_pDevice->BeginScene();
if(FAILED(rslt)) { return D3DError(rslt, __LINE__, __FILE__, "BeginScene() failed."); }
// ====================================================================================
// - Do our drawing operations
// ====================================================================================
// Tell D3D we want to use our vertex buffer as the "source stream"
g_pDevice->SetStreamSource(0, g_pVertexBuffer, sizeof(SIMPLETEXMAPVERTEX));
// Tell D3D we want to use our custom FVF define
g_pDevice->SetVertexShader(FVF_SIMPLETEXMAPVERTEX);
// We are going to use the mouse cursor position as the light source for the bump
// mapping. In other words, we need to create a vector from the cursor to the origin
D3DXVECTOR3 vLight;
POINT kPoint;
g_pDIMouse->GetAbsolutePos(&kPoint);
// Create a vector from the cursor position (no Z axis for this, the mouse is in 2D)
vLight.x = (((float)kPoint.x / (float)g_D3DSettings.m_nDeviceWidth) - 1);
vLight.y = (((float)kPoint.y / (float)g_D3DSettings.m_nDeviceHeight) - 1);
vLight.z = 1.0f;
// Normalize the vector. See the tutorial for more info! Normalization reduces the
// magnitude of a vector to 1, but keeps the original direction. This makes it a
// unit vector. Also see the Cheaters Guide to 3D Maths!
D3DXVec3Normalize( &vLight, &vLight );
// Now that we have our light vector, we need to turn it back into a greyscale
// RGB to use to modulate the texture with. Remember that we've normalized this
// vector, so .x and .y will be between 0.0 and 1.0f (which is why we need to
// * 127.0f and + 128.0f). Calculate it yourself, if vLight.x was 0.5f.
DWORD r = (DWORD)(127.0f * vLight.x + 128.0f);
DWORD g = (DWORD)(127.0f * vLight.y + 128.0f);
DWORD b = (DWORD)(127.0f * vLight.z + 128.0f);
DWORD dwFactor = D3DCOLOR_XRGB(r, g, b);
// Set the texture factor to the rgb calculated above. For more info on the texture
// factor and how it works with the D3DTA_TFACTOR state, refer to DirectX Basics
// Series 3 tutorial 4.
g_pDevice->SetRenderState(D3DRS_TEXTUREFACTOR, dwFactor);
// Modulate the texture (the normal map) with the light vector (stored
// above in the texture factor). From the SDK: "Modulate the components of each argument
// as signed components, add their products; then replicate the sum to all color
// channels, including alpha".
g_pDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
g_pDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_DOTPRODUCT3 );
g_pDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_TFACTOR );
// Set the texture to be the normal map
g_pDevice->SetTexture( 0, g_pNormalMapTexture );
// And finally tell D3D to draw our bumpmapped quad!
g_pDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);
// If all that looked too simple to do bumpmapping, don't worry - you're right. Most
// of the "magic" takes place in the D3DTOP_DOTPRODUCT3 texture stage, which does
// all the per pixel calculations for us.
// ====================================================================================
// - Render the mouse last so that Z-ordering keeps the cursor on top
// ====================================================================================
g_pDIMouse->Render(g_pDevice);
// ====================================================================================
// - Clean up and present the back buffer to be page flipped
// ====================================================================================
g_pDevice->EndScene();
// Present the back buffer to the display adapter to be drawn
g_pDevice->Present(NULL, NULL, NULL, NULL);
return S_OK;
}