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#include<GL/gl.h>
#include<GL/glu.h>
#include<GL/glut.h>
#include<math.h>
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,(GLdouble)screenWidth,0.0,(GLdouble)screenHeight);
    a=screenWidth/4.0;
    b=0.0;
    c=d=screenHeight/2.0;
    }
    void myDisplay(void){
        glClear(GL_COLOR_BUFFER_BIT);
        glBegin(GL_POINTS);
        for(GLdouble x=0;x<4.0;x+=0.005){
            GLdouble func=exp(-x)*cos(2*3.1415926*x);
            glVertex2d(a*x+b,c*func+d);
            }
        glEnd();
        glFlush();
        }
int main(int argc,char**argv){
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
    glutInitWindowSize(screenWidth,screenHeight);
    glutInitWindowPosition(100,150);
    glutCreateWindow("Dot Plot of a Function";
    glutDisplayFunc(myDisplay);
    myInit();
    glutMainLoop();
    }
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3Â¥: Originally posted by lvweizhong at 2015-10-19 23:09:21
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