lab_9

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

void display(void) {
    glClear(GL_COLOR_BUFFER_BIT);   //flush gl

    typedef GLint vertex3[2];   //2 attributes
    int rows= 3;
    int cols= 5;

    //data storage matrix
    vertex3 vData[rows][cols]= {
        {{0,80}, {50,50}, {100,100}, {150,75}, {200,120}},
        {{0,50}, {50,100}, {100,80}, {150,150}, {200,60}},
        {{0,20}, {50,70}, {100,120}, {150,160}, {200,200}}
    };

    //set flags
    glPushAttrib(GL_ENABLE_BIT);
    glEnable(GL_LINE_STIPPLE);

    //draw each line
    for(int r=0; r<rows; ++r){
        //line color, width, type
        switch(r){
            case 0:
                glColor3f(1.0, 0.0, 0.0);   //red
                glLineWidth(1.0);           //single-width
                glLineStipple(1, 0x00FF);   //dashed
                break;
            case 1:
                glColor3f(0.0, 1.0, 0.0);   //green
                glLineWidth(2.0);           //double-width
                glLineStipple(1, 0x0101);   //dotted
                break;
            case 2:
                glColor3f(0.0, 0.0, 1.0);   //blue
                glLineWidth(3.0);           //triple-width
                glLineStipple(1, 0x1C47);   //dash-dot
                break;
        }

        //draw each vertice
        glBegin(GL_LINE_STRIP);
            for(int c=0; c<cols; ++c){
                glVertex2iv(vData[r][c]);
            }
        glEnd();
    }

    //clear flags
    glPopAttrib();

    glFlush();
}

int main(int argc,char *argv[]) {
    glutInit(&argc,argv);                   //prepare glut
    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);       //set the display mode
    glutInitWindowSize (500, 500);          //the size of the program window
    glutInitWindowPosition (100, 100);      //initial position for the window
    glutCreateWindow ("CS334-Lab9");        //create window with a title

    glClearColor(0,0,0,0.0);                //background color
    glMatrixMode (GL_PROJECTION);           //2d envyronment
    gluOrtho2D (-20.0, 220.0, 0.0, 220.0);  //matrix dimensions

    glutDisplayFunc(display);               //show thee actual program
    glutMainLoop();

    return EXIT_SUCCESS;                    //exit the program
}