Programming and Graphics

7.7 Three-dimensional interactive graph 239

textsize(csizex,csizey);

// ..x axis ticks.../

for (int i=1; i<=ntcx+1; i++)

{

float xgo = xmin+(i-1.0)*ticx;

move (xgo, ymin, zmin);

rmove (0.0, tchx, 0.0); // ticks parallel to the y axis

rdraw (0.0,-tchx, 0.0);

rmove (0.0, 0.0, tchx); // ticks parallel to the z axis

rdraw (0.0, 0.0,-tchx);

file2 >> xunit;

color (lbc);

move (xgo-csizex, ymin-2.0*csizex, zmin);

if(xunit[0]==’-’)

{

move (xgo-2*csizex, ymin-2.0*csizex, zmin);

}

// ..y axis ticks.../

for (int i=1; i<=ntcy+1; i++)

{

float ygo = xmin+(i-1.0)*ticy;

move (xmin, ygo, zmin);

rmove ( tchy, 0, 0); // ticks parallel to the x axis;

rdraw (-tchy, 0, 0 );

rmove (0, 0, tchy); // ticks parallel to the z axis;

rdraw (0, 0,-tchy);

file2 >> xunit;

color (lbc);

move (xmin-ndig*csizex/2, ygo, zmin);

if(xunit[0]==’-’)

{

move (xmin-(ndig/2+1)*csizex, ygo, zmin);

}

// ..z axis ticks.../

for (int i=1; i<=ntcz+1; i++)

{

float zgo = zmin+(i-1.0)*ticz;

move (xmin, ymin, zgo);

rmove ( tchz, 0.0, 0.0); // ticks parallel to the x axis;

rdraw (-tchz, 0.0, 0.0);

rmove (0.0, tchz, 0.0); // ticks parallel to the y axis;

rdraw (0.0,-tchz, 0.0);