Programming and Graphics

7.6 Graph animation 233

{

points[1][1] = xmin;

points[1][2] = ymin;

points[2][1] = xmax;

points[2][2] = ymin;

points[3][1] = xmax;

points[3][2] = ymax;

points[4][1] = xmin;

points[4][2] = ymax;

poly2 (4,points);

}

//--- Data:

for (int i=0; i<n; i++)

{

yd[i] = 0.5+ 0.2*sin(6*xd[i]-0.3*t);

}

//--- Markers:

color (BLACK);

int marker = 0;

for(int i=0; i<n; i++)

{

if( xd[i]>xmin && xd[i]<xmax

&& yd[i]>ymin && yd[i]<ymax)

drawmarker2d (xd[i], yd[i], marker

xmin, xmax,ymin, ymax);

}

//--- Prepare the graph:

color (BLUE);

Icheck=1;

drawline2d (n,xd,yd,xmin,xmax,ymin,ymax,Icheck);

//--- Draw draw axes:

drawaxes2d

(xmin,xmax

,ymin,ymax

,ntcx,ntcy

,Ilabelax // 1 to label axes; 0 for no labels

,axc // axis color

,lbc // label color

,labelx // x-axis label