Programming and Graphics

212 Introduction to C++ Programming and Graphics

//--- Loop indefinitely:

while((but=slocator(&x, &y)) != 44)

{

pushmatrix();

rotate(120.0 * x, ’y’);

rotate(120.0 * y, ’x’);

color(BLACK);

clear();

color(20);

drawshape(1);

if (nplanes == 1)

{

drawshape(0);

}

popmatrix();

swapbuffers();

//--- Check the keyboard:

switch (but = checkkey())

{

case ’p’:

voutput("licosa.ps");

vnewdev("postscript");

pushmatrix();

rotate(100.0 * x, ’y’);

rotate(100.0 * y, ’x’);

color(BLACK);

clear();

drawshape(1);

if (nplanes == 1)

drawshape(0);

popmatrix();

vnewdev(device);

break;

case ’x’:

translate(tdir, 0.0, 0.0);

break;

case ’y’:

translate(0.0, tdir, 0.0);

break;

case ’z’:

translate(0.0, 0.0, tdir);

break;

case ’-’:

tdir = -tdir;