opengl 与CG结合的骨骼动画

//----------------------------------------------------------------------------- // Name: ogl_cg_skinning.cpp // Author: Kevin Harris // Last Modified: 04/28/05 // Description: This sample demonstrates how to skin a mesh on the hardware // using a Cg shader. To keep things simple, the skeletal // system used in this sample is very simple and only consists // of two bones or bone matrices. // // Special thanks go out to Cyril Zeller, and Matthias Wloka // of nVIDIA for their help in straightening out a few oddities // that my sample was suffering from. In short, Cg works fine // and I'm occasionally a big dummy! ;) // // Control Keys: Left Mouse Button - Spin the matrix for bone0. // Right Mouse Button - Spin the matrix for bone1. // // F1 - Toggle test geometry between a cylinder and a simple // grouping of 3 quads. // F2 - Toggle wire-frame mode //----------------------------------------------------------------------------- #define STRICT #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <GL/gl.h> #include <GL/glu.h> #include <Cg/Cg.h> #include <Cg/cgGL.h> #include "matrix4x4f.h" #include "vector3f.h" #include "resource.h" //----------------------------------------------------------------------------- // GLOBALS //----------------------------------------------------------------------------- HWND g_hWnd = NULL; HDC g_hDC = NULL; HGLRC g_hRC = NULL; GLuint g_boneDisplayList = -1; CGprofile g_CGprofile; CGcontext g_CGcontext; CGprogram g_CGprogram; CGparameter g_CGparam_modelViewProjection; CGparameter g_CGparam_modelViewInverse; CGparameter g_CGparam_boneMatrices; CGparameter g_CGparam_eyePosition; CGparameter g_CGparam_lightVector; CGparameter g_CGparam_weights; CGparameter g_CGparam_matrixIndices; CGparameter g_CGparam_numBones; bool g_bRenderInWireFrame = false; bool g_bRenderQuads = false; float g_fDistance = -12.0f; float g_fSpinX_L = 0.0f; float g_fSpinY_L = 0.0f; float g_fSpinX_R = 0.0f; float g_fSpinY_R = 0.0f; const int MAX_BONES = 2; matrix4x4f g_boneMatrix0; matrix4x4f g_boneMatrix1; matrix4x4f g_matrixToRenderBone0; matrix4x4f g_matrixToRenderBone1; struct Vertex { float r, g, b, a; float nx, ny, nz; float x, y, z; float weights[MAX_BONES]; float matrixIndices[MAX_BONES]; float numBones; }; // Cylinder geometry const int CYLINDER_RESOLUTION = 12; const int NUM_CYLINDER_SECTIONS = 6; const int NUM_VERTICES_PER_SECTION = CYLINDER_RESOLUTION * 2; const int NUM_VERTICES = NUM_VERTICES_PER_SECTION * NUM_CYLINDER_SECTIONS; Vertex g_cylinderVertices[NUM_VERTICES]; // Quad geometry Vertex g_quadVertices[] = { // r g b a nx ny nz x y z w0 w1 mi0 mi1 nb { 1.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, -1.0f,0.0f,0.0f, 1.0f,0.0f, 0.0f,0.0f, 1.0f }, // Quad 0 { 1.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, 1.0f,0.0f,0.0f, 1.0f,0.0f, 0.0f,0.0f, 1.0f }, { 1.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, 1.0f,2.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, { 1.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, -1.0f,2.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, { 0.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, -1.0f,2.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, // Quad 1 { 0.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, 1.0f,2.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, { 0.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, 1.0f,4.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, { 0.0f,1.0f,0.0f,1.0f, 0.0f,0.0f,1.0, -1.0f,4.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, { 0.0f,0.0f,1.0f,1.0f, 0.0f,0.0f,1.0, -1.0f,4.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, // Quad 2 { 0.0f,0.0f,1.0f,1.0f, 0.0f,0.0f,1.0, 1.0f,4.0f,0.0f, 0.5f,0.5f, 0.0f,1.0f, 2.0f }, { 0.0f,0.0f,1.0f,1.0f, 0.0f,0.0f,1.0, 1.0f,6.0f,0.0f, 1.0f,0.0f, 1.0f,0.0f, 1.0f }, { 0.0f,0.0f,1.0f,1.0f, 0.0f,0.0f,1.0, -1.0f,6.0f,0.0f, 1.0f,0.0f, 1.0f,0.0f, 1.0f } }; //----------------------------------------------------------------------------- // 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 render(void); void shutDown(void); void initShader(void); void setShaderConstants(void); void createMeshCylinderWithWeightedVertices(void); //----------------------------------------------------------------------------- // 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 | CS_OWNDC; winClass.lpfnWndProc = WindowProc; winClass.hInstance = hInstance; winClass.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_OPENGL_ICON); winClass.hIconSm = LoadIcon(hInstance, (LPCTSTR)IDI_OPENGL_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", "OpenGL - Skinning on the Hardware Using a Cg Shader", 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(); initShader(); 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 ) { static POINT ptLastMousePosit_L; static POINT ptCurrentMousePosit_L; static bool bMousing_L; static POINT ptLastMousePosit_R; static POINT ptCurrentMousePosit_R; static bool bMousing_R; switch( msg ) { case WM_KEYDOWN: { switch( wParam ) { case VK_ESCAPE: PostQuitMessage(0); break; case VK_F1: g_bRenderQuads = !g_bRenderQuads; break; case VK_F2: g_bRenderInWireFrame = !g_bRenderInWireFrame; if( g_bRenderInWireFrame == true ) glPolygonMode( GL_FRONT_AND_BACK, GL_LINE ); else glPolygonMode( GL_FRONT_AND_BACK, GL_FILL ); break; case 38: // Up Arrow Key g_fDistance += 1.0f; break; case 40: // Down Arrow Key g_fDistance -= 1.0f; break; } } break; case WM_LBUTTONDOWN: { ptLastMousePosit_L.x = ptCurrentMousePosit_L.x = LOWORD (lParam); ptLastMousePosit_L.y = ptCurrentMousePos