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#include <windows.h> #include <gl/gl.h> #include <gl/glu.h> #include <gl/glaux.h> #include <math.h> //------------------------------------------------------------ #define PI 3.1415926535897932384626433832795 //------------------------------------------------------------ #define EPSILON 0.001 #define TIME_PER_TURN 10 //------------------------------------------------------------ #define MY_TORUS 1 //------------------------------------------------------------ void RePaint(HDC DC,double zoom,double theta,double phi) { static double q; if(TRUE) { static DWORD oldCall; DWORD t; t = GetTickCount(); q += (360.*((double)(t - oldCall)))/(1000.*((double)TIME_PER_TURN)); oldCall = t; } glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glEnable(GL_DEPTH_TEST); glEnable(GL_TEXTURE_2D); glPushAttrib(GL_CURRENT_BIT); // position de l'oeil gluLookAt(zoom*cos(theta)*cos(phi),zoom*sin(theta)*cos(phi),zoom*sin(phi),0,0,0,cos(theta-PI)*cos(PI/2.-phi),sin(theta-PI)*cos(PI/2.-phi),sin(PI/2.-phi)); // les axes if(TRUE) { glColor3d(1.,1.,1.); // blanc glBegin(GL_LINES); glVertex3d(-500,0,0); glVertex3d(+500,0,0); glVertex3d(0,-500,0); glVertex3d(0,+500,0); glVertex3d(0,0,-500); glVertex3d(0,0,+500); glEnd(); } // les torus if(TRUE) { glPushMatrix(); glCallList(MY_TORUS); glPopMatrix(); } // fin du dessinage glPopAttrib(); glPopMatrix(); SwapBuffers(DC); } //------------------------------------------------------------ void InitPixelFormat(HDC hdc) { PIXELFORMATDESCRIPTOR pfd = {sizeof (PIXELFORMATDESCRIPTOR),1,PFD_SUPPORT_OPENGL | PFD_TYPE_RGBA | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER,16,0,0,0,0,0,0,0,0,0,0,0,0,0,16,0,0,0,0,0,0,0}; SetPixelFormat(hdc,ChoosePixelFormat(hdc,&pfd),&pfd); } //------------------------------------------------------------ static void CalcPointTorus(double R,double r,double t,double a,double z) { glVertex3d( (R + r*cos(a))*cos(t), (R + r*cos(a))*sin(t), z+r*sin(a) ); } //------------------------------------------------------------ // creer un torus d'axes z de grand rayon <R> et de petit rayon <r> // le commencement de fait a z=0 et la fin a z=<dz> void MyCreateTorus(double R,double r,int nVertex,int slices,double angleBegin,double angleEnd,double dz) { double theta,stepTheta,oldTheta; double stepAlpha; double z,oldZ,stepDz; stepTheta = (angleEnd - angleBegin)/((double)nVertex); stepAlpha = 2.*PI/slices; stepDz = dz/((double)nVertex); glBegin(GL_TRIANGLE_STRIP); oldTheta = angleBegin; oldZ = 0.; z = stepDz; for(theta=angleBegin+stepTheta;theta<=angleEnd+EPSILON;theta+=stepTheta) { double a,b; // alpha,beta for(a=0.,b=0.5*stepAlpha;a<=2.*PI+EPSILON;a+=stepAlpha,b+=stepAlpha) { CalcPointTorus(R,r,oldTheta ,b,oldZ); CalcPointTorus(R,r,theta ,a,z); } oldTheta = theta; oldZ = z; z += stepDz; } glEnd(); } //------------------------------------------------------------ LRESULT CALLBACK WindowProc(HWND hwnd,UINT iMsg,WPARAM wParam,LPARAM lParam) { static HDC hdc; static HGLRC hrc; static int cxClient,cyClient; static double zoom,theta,phi,_theta,_phi; static BOOL isMouseDown; static int xMouseStart,yMouseStart; // traitement des messages switch (iMsg) { case WM_CREATE: { hdc=GetDC(hwnd); InitPixelFormat(hdc); hrc = wglCreateContext(hdc); wglMakeCurrent(hdc,hrc); glEnable(GL_DEPTH_TEST); glClearColor(0,0,0,0); // creation des torus if(TRUE) { // support glNewList(MY_TORUS,GL_COMPILE); // premier figure glColor3d(1.,1.,0.1); // jaune glPushMatrix(); MyCreateTorus(125.,4.,32,10,0.,2.*PI,0.); glRotated(90.,1.,0.,0.); MyCreateTorus(125.,4.,32,10,0.,2.*PI,0.); glRotated(90.,0.,1.,0.); MyCreateTorus(125.,4.,32,10,0.,2.*PI,0.); glPopMatrix(); glColor3d(0.1,1.,0.1); // vert glPushMatrix(); glTranslated(250.,0.,-250.); MyCreateTorus(125.,4.,200,10,0.,8.*PI,500.); glPopMatrix(); glColor3d(1.,0.1,0.1); // rouge glPushMatrix(); MyCreateTorus(500.,4.,32,10,0.,PI,0.); glRotated(120.,1.,0.,0.); MyCreateTorus(500.,4.,32,10,0.,PI,0.); glRotated(120.,1.,0.,0.); MyCreateTorus(500.,4.,32,10,0.,PI,0.); glPopMatrix(); glColor3d(0.1,0.1,1.); // bleu glPushMatrix(); glTranslated(-250.,0.,0.); glPushMatrix(); glTranslated(0.,0.,-100.); MyCreateTorus(100.,4.,32,10,0.,2.*PI,0.); glTranslated(0.,0.,200.); MyCreateTorus(100.,4.,32,10,0.,2.*PI,0.); glPopMatrix(); glRotated(90.,1.,0.,0.); glPushMatrix(); glTranslated(0.,0.,-100.); MyCreateTorus(100.,4.,32,10,0.,2.*PI,0.); glTranslated(0.,0.,200.); MyCreateTorus(100.,4.,32,10,0.,2.*PI,0.); glPopMatrix(); glRotated(90.,0.,1.,0.); glPushMatrix(); glTranslated(0.,0.,-100.); MyCreateTorus(100.,4.,32,10,0.,2.*PI,0.); glTranslated(0.,0.,200.); MyCreateTorus(100.,4.,32,10,0.,2.*PI,0.); glPopMatrix(); glPopMatrix(); glEndList(); } zoom = 1400.; // on veut les coordonnees de l'ecran (meme direction) theta = -PI/2; phi = -PI/2; break; } case WM_SIZE: { double r; cxClient = LOWORD(lParam); cxClient = (cxClient ? cxClient : 1); cyClient = HIWORD(lParam); cyClient = (cyClient ? cyClient : 1); glViewport(0,0,cxClient,cyClient); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if(1 > (r = (float)(cxClient)/(float)(cyClient))) { //r = (float)(cyClient)/(float)(cxClient); } gluPerspective(45.,r,100.,100000.); break; } case WM_CHAR: { switch((char)wParam) { case 'a': { zoom -= 10.; return 0; } case 'q': { zoom += 10.; return 0; } } break; } case WM_LBUTTONDOWN: { xMouseStart = LOWORD(lParam); yMouseStart = HIWORD(lParam); // on sauvegarde les angles _theta = theta; _phi = phi; isMouseDown = TRUE; SetCapture(hwnd); return 0; } case WM_LBUTTONUP: { if(isMouseDown) { ReleaseCapture(); isMouseDown = FALSE; } return 0; } case WM_MOUSEMOVE: { if(isMouseDown) { int x,y; x = (int) (__int16) LOWORD(lParam); y = (int) (__int16) HIWORD(lParam); // attention, comme les coordonnees en Y // client sont inversees (de haut en bas) // il faut faire -, et non + // comme pout le X theta = _theta + ((xMouseStart - x)*2*PI)/(double)cxClient; phi = _phi - ((yMouseStart - y)*2*PI)/(double)cyClient; } return 0; } case WM_PAINT: { RePaint(hdc,zoom,theta,phi); return 0; } case WM_DESTROY: { glDeleteLists(MY_TORUS,1); wglMakeCurrent(NULL, NULL); wglDeleteContext(hrc); ReleaseDC(hwnd,hdc); PostQuitMessage(0); break; } } return DefWindowProc(hwnd,iMsg,wParam,lParam); } //------------------------------------------------------------ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int CmdShow) { WNDCLASS wc; MSG msg; HWND hWnd; wc.style = CS_OWNDC; wc.lpfnWndProc = WindowProc; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hInstance = hInstance; wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = NULL; wc.lpszMenuName = NULL; wc.lpszClassName = "jcdTorus"; RegisterClass(&wc); hWnd = CreateWindow("jcdTorus","Objet 3D en OpenGL : Torus", WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT, NULL,NULL,hInstance,NULL ); ShowWindow(hWnd,SW_SHOWMAXIMIZED); UpdateWindow(hWnd); while(GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return 0; }
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