breakup.cpp

//      SETI Visualizations
//	by Immanuel Buder

#include <stdlib.h>
#include <iostream.h>
#include <GL/glut.h>

double f,t;
int mainwindow;       //window id numbers
GLint height, width;		//window size

void display ();            //main drawing function (prototype)
void outtext (double x, double y, double z, char *string, void *font); //not used

void initialize () {
    height = width = 500;                   //set size
    glutInitDisplayMode(GLUT_RGB);   //OpenGl mode
	glutInitWindowSize(width, height);
	mainwindow = glutCreateWindow("SETI Visualizations");    //create main window
	glutDisplayFunc(display);       //set display function
	
    glClearColor(.3,.3,.6,0);       //background color
	glMatrixMode(GL_PROJECTION);	//create view
	glLoadIdentity();               //
	glOrtho(0,500,0,2500,-1,1);      //drawspace size

//    cwidth= 200; cheight = 200;  //no longer used
    glutInitDisplayMode(GLUT_DEPTH|GLUT_SINGLE|GLUT_RGB);
    
/*    controlwindow = glutCreateWindow("Controls");
    glutDisplayFunc(controldisplay);        //no longer used
    glClearColor (1,1,1,1);
    glClear(GL_COLOR_BUFFER_BIT);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(-1,1,-1,1,-1,1);

    Twindow = glutCreateSubWindow(controlwindow, 10, 10, 40, 40);
    glutDisplayFunc(Tdisplay);
    glutMouseFunc(Tmouse);*/
}

void outtext (double x, double y, double z, char *string, void *font) {
	glRasterPos3f(x,y,z);		//locate position for output   
	int len = strlen (string); //find length of output
    for (int i = 0; i < len; i++) { 
		glutBitmapCharacter(font,string[i]);	//output by chars
    }    
}

void display () {
	glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);	//clear
	glColor3f(.8,0,.6);             //color
    glBegin(GL_QUADS);              //draw background square
    glVertex3f(0,0,0);
    glVertex3f(0,2500,0);
    glVertex3f(500,2500,0);
    glVertex3f(500,0,0);
   
    glColor3f(.8,.8,0);
    glVertex3f(0,0,0);              //draw foreground rectangle
    glVertex3f(0,f,0);
    glVertex3f(t,f,0);
    glVertex3f(t,0,0);
    
    glEnd();                //done drawing quads
    
    glColor3f(1,1,1);
    outtext(200,50,0.1,"Time",GLUT_BITMAP_TIMES_ROMAN_24);  //label axes
    outtext(10,1250,.1,"Frequency",GLUT_BITMAP_TIMES_ROMAN_24); 
    glFlush();	//force drawing	
    cout<<"The current frequency width is "<<f<<" kHz"<<endl
        <<"The current time width is "<<t<<" s"<<endl
        <<"The current data size is "<<2*f*t<<" Kb"<<endl;
    cout<<"Enter new (f,t) in (kHz,s)"<<endl;
    cin>>f>>t;
    glutPostRedisplay();        //redraw after input
    //    glutPostWindowRedisplay(Twindow);
}

int main (int argc, char ** argv) {
    f = 10;         //initialize values = SETI@home current
    t=107;
    initialize();               //OpenGL stuff
    glutMainLoop();             //hand control to OpenGL
    return 0;
}