图形学opengl绘图入门代码.doc

/ opg1.cpp : Defines the entry point for the console application./#include stdafx.h/*#include void display(void) glClear (GL_COLOR_BUFFER_BIT);/ clear all pixels glColor3f (1.0, 1.0, 1.0); glBegin(GL_POLYGON);/draw white polygon glVertex3f (0.25, 0.25, 0.0); glVertex3f (0.75, 0.25, 0.0); glVertex3f (0.75, 0.75, 0.0); glVertex3f (0.25, 0.75, 0.0); glEnd(); glFlush ();/ start processing buffered OpenGL routines void init (void) glClearColor (0.0, 0.0, 0.0, 0.0);/ select clearing color glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);/ initialize viewing values int main(int argc, char* argv) glutInit(&argc, argv); glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); glutInitWindowSize (250, 250); /Declare initial window size. glutInitWindowPosition (100, 100);/Declare initial window position. glutCreateWindow (hello);/Open window with helloin its title bar. init ();/Call initialization routines. glutDisplayFunc(display); /*Register callback function to display graphics. glutMainLoop();/Enter main loop and process events. return 0; / ANSI C requires main to return int. */ GL_2_17.cpp : Defines the entry point for the console application./*#include #include #include #include const int screenWidth=640;const int screenHeight=480;GLdouble A,B,C,D;void myInit(void)glClearColor(1.0,1.0,1.0,0.0);glColor3f(0.0f,0.0f,0.0f);glPointSize(2.0);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluOrtho2D(0.0,screenWidth,0.0,screenHeight);A=screenWidth/4.0;B=0.0;C=D=screenHeight/2.0;void myDisplay(void)glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBegin(GL_POINTS);for(GLdouble x=0;x4.0;x+=0.001)GLdouble func=exp(-x)*cos(2*3.14159265*x);glVertex2d(A*x+B,C*func+D);glEnd();glFlush();void main(int argc, char* argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowSize(640,480);glutInitWindowPosition(100,150);glutCreateWindow(Dot plot of a function);glutDisplayFunc(myDisplay);myInit();glutMainLoop();*/图形学第三课-opengl绘图入门代码#include #include #include #include #include void myInit(void)glClearColor(0.0,0.0,0.0,0.0);glClear(GL_COLOR_BUFFER_BIT);void myReshape(GLsizei w,GLsizei h)glViewport(0,0,w,h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if(w=h)glOrtho(-1.5,1.5,-1.5*(GLfloat)h/(GLfloat)w, 1.5*(GLfloat)h/(GLfloat)w,-10.0,10.0);elseglOrtho(-1.5*(GLfloat)h/(GLfloat)w, 1.5*(GLfloat)h/(GLfloat)w,-1.5,1.5,-10.0,10.0);glMatrixMode(GL_MODELVIEW); glLoadIdentity();void myDisplay(void)glColor3f(1.0,1.0,0.0);/auxWireSphere(1.0);auxSolidTeapot(1.0);glFlush();void main(int argc, char* argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowSize(640,480);glutInitWindowPosition(100,150);glutCreateWindow(AUX_SAMPLE);myInit();glutReshapeFunc(myReshape); glutDisplayFunc(myDisplay);glutMainLoop();图形学opengl入门-建模代码#include #include #include #include #include void DrawMyObjects(void)/* draw some points */glBegin(GL_POINTS);glColor3f(1.0,0.0,0.0);glVertex2f(-10.0,11.0);glColor3f(1.0,1.0,0.0);glVertex2f(-9.0,10.0);glColor3f(0.0,1.0,1.0);glVertex2f(-8.0,12.0);glEnd();/* draw some line_segments */glBegin(GL_LINES); glColor3f(1.0,1.0,0.0);glVertex2f(-11.0,8.0);glVertex2f(-7.0,7.0);glColor3f(1.0,0.0,1.0);glVertex2f(-11.0,9.0);glVertex2f(-8.0,6.0);glEnd();/* draw one opened_line */glBegin(GL_LINE_STRIP); glColor3f(0.0,1.0,0.0);glVertex2f(-3.0,9.0);glVertex2f(2.0,6.0);glVertex2f(3.0,8.0);glVertex2f(-2.5,6.5);glEnd();/* draw one closed_line */glBegin(GL_LINE_LOOP); glColor3f(0.0,1.0,1.0);glVertex2f(7.0,7.0);glVertex2f(8.0,8.0);glVertex2f(9.0,6.5);glVertex2f(10.3,7.5);glVertex2f(11.5,6.0);glVertex2f(7.5,6.0);glEnd();/* draw one filled_polygon */glBegin(GL_POLYGON); glColor3f(0.5,0.3,0.7);glVertex2f(-7.0,2.0);glVertex2f(-8.0,3.0);glVertex2f(-10.3,0.5);glVertex2f(-7.5,-2.0);glVertex2f(-6.0,-1.0);glEnd();/* draw some filled_quandrangles */glBegin(GL_QUADS); glColor3f(0.7,0.5,0.2);glVertex2f(0.0,2.0);glVertex2f(-1.0,3.0);glVertex2f(-3.3,0.5);glVertex2f(-0.5,-1.0);glColor3f(0.5,0.7,0.2);glVertex2f(3.0,2.0);glVertex2f(2.0,3.0);glVertex2f(0.0,0.5);glVertex2f(2.5,-1.0);glEnd();/* draw some filled_strip_quandrangles */glBegin(GL_QUAD_STRIP); glVertex2f(6.0,-2.0); glVertex2f(5.5,1.0);glVertex2f(8.0,-1.0);glColor3f(0.8,0.0,0.0);glVertex2f(9.0,2.0);glVertex2f(11.0,-2.0);glColor3f(0.0,0.0,0.8);glVertex2f(11.0,2.0);glVertex2f(13.0,-1.0);glColor3f(0.0,0.8,0.0);glVertex2f(14.0,1.0);glEnd();/* draw some filled_triangles */glBegin(GL_TRIANGLES); glColor3f(0.2,0.5,0.7);glVertex2f(-10.0,-5.0);glVertex2f(-12.3,-7.5);glVertex2f(-8.5,-6.0);glColor3f(0.2,0.7,0.5);glVertex2f(-8.0,-7.0);glVertex2f(-7.0,-4.5);glVertex2f(-5.5,-9.0);glEnd();/* draw some filled_strip_triangles */glBegin(GL_TRIANGLE_STRIP); glVertex2f(-1.0,-8.0);glVertex2f(-2.5,-5.0);glColor3f(0.8,0.8,0.0);glVertex2f(1.0,-7.0);glColor3f(0.0,0.8,0.8);glVertex2f(2.0,-4.0);glColor3f(0.8,0.0,0.8);glVertex2f(4.0,-6.0);glEnd();/* draw some filled_fan_triangles */glBegin(GL_TRIANGLE_FAN); glVertex2f(8.0,-6.0);glVertex2f(10.0,-3.0);glColor3f(0.8,0.2,0.5);glVertex2f(12.5,-4.5);glColor3f(0.2,0.5,0.8);glVertex2f(13.0,-7.5);glColor3f(0.8,0.5,0.2);glVertex2f(10.5,-9.0);glEnd();void myInit(void)glClearColor(0.0,0.0,0.0,0.0);glClear(GL_COLOR_BUFFER_BIT);glShadeModel(GL_FLAT);void myReshape(GLsizei w,GLsizei h)glViewport(0,0,w,h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if(w=h)glOrtho(-20.0,20.0,-20.0*(GLfloat)h/(GLfloat)w, 20.0*(GLfloat)h/(GLfloat)w,-50.0,50.0);elseglOrtho(-20.0*(GLfloat)h/(GLfloat)w, 20.0*(GLfloat)h/(GLfloat)w,-20.0,20.0,-50.0,50.0);glMatrixMode(GL_MODELVIEW); glLoadIdentity();void myDisplay(void)glColor3f(1.0,1.0,0.0);DrawMyObj