dx9_spot_light.zip_directx9.0

//----------------------------------------------------------------------------- // Name: dx9_spot_light.cpp // Author: Kevin Harris (kevin@codesampler.com) // Last Modified: 02/17/05 // Description: This sample demonstrates how to setup a spot light with // Direct3D. The sample also demonstrates how the tessellation // or triangle count of a mesh effects lighting. // // Control Keys: v - Decrease the mesh's tessellation or vertex count // V - Increase the mesh's tessellation or vertex count // w - Toggle wire-frame mode // // r - Decrease Range // R - Increase Range // t - Decrease Theta // T - Increase Theta // p - Decrease Phi // P - Increase Phi // f - Decrease Falloff // F - Increase Falloff // F1 - Decrease Attenuation0 // F2 - Increase Attenuation0 // F3 - Decrease Attenuation1 // F4 - Increase Attenuation1 // F5 - Decrease Attenuation2 // F6 - Increase Attenuation2 // // Up - Move the spot light up // Down - Move the spot light down // Left - Swing the spot to the left // Right - Swing the spot to the right // // NOTE: Please refer to the DirectX 9.0c Documentation for the more // information concerning the Attenuation, Theta, Phi, and Falloff // controls. //----------------------------------------------------------------------------- #define STRICT #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <mmsystem.h> #include <d3d9.h> #include <d3dx9.h> #include "resource.h" //----------------------------------------------------------------------------- // GLOBALS //----------------------------------------------------------------------------- HWND g_hWnd = NULL; LPDIRECT3D9 g_pD3D = NULL; LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; LPDIRECT3DVERTEXBUFFER9 g_pMeshVertices = NULL; // Vertex buffer for our custom made mesh LPD3DXMESH g_pConeMesh = NULL; // A mesh to represent a spot light D3DLIGHT9 g_light0; D3DMATERIAL9 g_meshMaterial; D3DMATERIAL9 g_coneMaterial; bool g_bRenderInWireFrame = false; float g_fLightPositionY = 3.0f; float g_fLightDirectionX = 0.0f; float g_fAttenuation0 = 0.0f; float g_fAttenuation1 = 0.5f; float g_fAttenuation2 = 0.0f; float g_fRange = 10.0f; float g_fTheta = 0.5f; float g_fPhi = 1.0f; float g_fFalloff = 1.0f; int g_nMeshVertCount = 0; int g_nNumVerts = 64; #define D3DFVF_MY_VERTEX ( D3DFVF_XYZ | D3DFVF_NORMAL | D3DFVF_DIFFUSE ) struct Vertex { float x, y, z; // Position of vertex in 3D space float nx, ny, nz; // Normal for lighting calculations DWORD diffuse; // Diffuse color of vertex }; //----------------------------------------------------------------------------- // PROTOTYPES //----------------------------------------------------------------------------- int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow); LRESULT CALLBACK WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); void init(void); void shutDown(void); void render(void); void initLighting(void); int createSimpleMesh(int nNumVertsAlongX, int nNumVertsAlongZ, float fMeshLengthAlongX, float fMeshLengthAlongZ); //----------------------------------------------------------------------------- // Name: WinMain() // Desc: The application's entry point //----------------------------------------------------------------------------- int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow ) { WNDCLASSEX winClass; MSG uMsg; memset(&uMsg,0,sizeof(uMsg)); winClass.lpszClassName = "MY_WINDOWS_CLASS"; winClass.cbSize = sizeof(WNDCLASSEX); winClass.style = CS_HREDRAW | CS_VREDRAW; winClass.lpfnWndProc = WindowProc; winClass.hInstance = hInstance; winClass.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_DIRECTX_ICON); winClass.hIconSm = LoadIcon(hInstance, (LPCTSTR)IDI_DIRECTX_ICON); winClass.hCursor = LoadCursor(NULL, IDC_ARROW); winClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); winClass.lpszMenuName = NULL; winClass.cbClsExtra = 0; winClass.cbWndExtra = 0; if(!RegisterClassEx( &winClass) ) return E_FAIL; g_hWnd = CreateWindowEx( NULL, "MY_WINDOWS_CLASS", "Direct3D (DX9) - Spot Light", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 640, 480, NULL, NULL, hInstance, NULL ); if( g_hWnd == NULL ) return E_FAIL; ShowWindow( g_hWnd, nCmdShow ); UpdateWindow( g_hWnd ); init(); while( uMsg.message != WM_QUIT ) { if( PeekMessage( &uMsg, NULL, 0, 0, PM_REMOVE ) ) { TranslateMessage( &uMsg ); DispatchMessage( &uMsg ); } else render(); } shutDown(); UnregisterClass( "MY_WINDOWS_CLASS", winClass.hInstance ); return uMsg.wParam; } //----------------------------------------------------------------------------- // Name: WindowProc() // Desc: The window's message handler //----------------------------------------------------------------------------- LRESULT CALLBACK WindowProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) { switch( msg ) { case WM_CHAR: { switch( wParam ) { case 'v': g_nNumVerts -= 1; // Don't let the mesh's resolution get too low! if( g_nNumVerts <= 1 ) g_nNumVerts = 2; // Release the old mesh so we can create a new one. if( g_pMeshVertices != NULL ) g_pMeshVertices->Release(); g_nMeshVertCount = createSimpleMesh( g_nNumVerts, g_nNumVerts, 10.0f, 10.0f ); break; case 'V': g_nNumVerts += 1; // Release the old mesh so we can create a new one. if( g_pMeshVertices != NULL ) g_pMeshVertices->Release(); g_nMeshVertCount = createSimpleMesh( g_nNumVerts, g_nNumVerts, 10.0f, 10.0f ); break; case 'r': g_fRange -= 1.0f; break; case 'R': g_fRange += 1.0f; break; case 't': g_fTheta -= 0.01f; if( g_fTheta < 0.0f ) g_fTheta = 0.0f; break; case 'T': g_fTheta += 0.01f; break; case 'p': g_fPhi -= 0.01f; if( g_fPhi < 0.0f ) g_fPhi = 0.0f; break; case 'P': g_fPhi += 0.01f; break; case 'f': g_fFalloff -= 0.01f; if( g_fFalloff < 0.0f ) g_fFalloff = 0.0f; break; case 'F': g_fFalloff += 0.01f; break; case 'w': case 'W': g_bRenderInWireFrame = !g_bRenderInWireFrame; if( g_bRenderInWireFra