Drawing 3D Objects - Flash 3D: Animation, Interactivity, and Games - page 318

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// create intermediate coordinate arrays
x2 = []; y2 = []; z2 = [];
x3 = []; y3 = []; z3 = [];

for ( n = 0; n < numPts; n++ )
{
if (ar == 0) // no x-axis rotation
{ x2[n] = x[n];
y2[n] = y[n];
z2[n] = z[n];
} else
{
// rotate about the x-axis
x2[n] = x[n];
y2[n] = -(z[n]-zc)*sina + (y[n]-yc)*cosa + yc;
z2[n] = (z[n]-zc)*cosa + (y[n]-yc)*sina + zc;
}
if (br == 0) // no y-axis rotation
{ x3[n] = x2[n];
y3[n] = y2[n];
z3[n] = z2[n];
} else
{
// rotate about the y-axis
x3[n] = (x2[n]-xc)*cosb + (z2[n]-zc)*sinb + xc;
y3[n] = y2[n];
z3[n] = -(x2[n]-xc)*sinb + (z2[n]-zc)*cosb + zc;
}
if (cr == 0) // no z-axis rotation
{ x[n] = x3[n];
y[n] = y3[n];
z[n] = z3[n];
} else
{
// rotate about the z-axis
x[n] = -(y3[n]-yc)*sinc + (x3[n]-xc)*cosc + xc;
y[n] = (y3[n]-yc)*cosc + (x3[n]-xc)*sinc + yc;
z[n] = z3[n];
}
}
}