/usr/share/slsh/local-packages/xfig/objects.sl is in slang-xfig 0.2.0~.117-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | % -*- mode: slang; mode: fold; -*-
% Creates a rectangle with the LL corner at the origin
define xfig_new_rectangle (dx, dy)
{
return xfig_new_polygon (vector([0,dx,dx,0,0], [0,0,dy,dy,0], [0,0,0,0,0]));
}
define xfig_new_grid (nx, ny, dx, dy)
{
variable lenx, leny;
variable X;
leny = ny * dy;
lenx = nx * dx;
variable border = xfig_new_rectangle (lenx, leny);
variable list = xfig_new_polyline_list ();
nx++;
ny++;
variable xs, ys, zs, x, y;
x = 0;
ys = [0,leny];
zs = [0,0];
loop (nx)
{
X = vector ([x,x], ys, zs);
list.insert (X);
x += dx;
}
xs = [0, lenx];
y = 0;
loop (ny)
{
X = vector (xs, [y,y], zs);
list.insert (X);
y += dy;
}
%return list;
return xfig_new_compound (border, list);
}
%}}}
define xfig_new_block (dx, dy, dz)
{
variable block = xfig_new_polygon_list ();
variable X, p, obj;
variable zeros = [0,0,0,0,0];
% Bottom
X = vector ([0, 0, dx, dx, 0], [0, dy, dy, 0, 0], zeros);
block.insert (xfig_new_polygon(X));
% Top
X = vector ([0, dx, dx, 0, 0], [0, 0, dy, dy, 0], [dz, dz, dz, dz, dz]);
block.insert (xfig_new_polygon(X));
% Left
X = vector ([0, dx, dx, 0, 0], zeros, [0, 0, dz, dz, 0]);
block.insert (xfig_new_polygon(X));
% Front
X = vector ([dx, dx, dx, dx, dx], [0, dy, dy, 0, 0], [0, 0, dz, dz, 0]);
block.insert (xfig_new_polygon(X));
% Back
X = vector (zeros, [0, 0, dy, dy, 0], [0, dz, dz, 0, 0]);
block.insert (xfig_new_polygon(X));
% Right
X = vector ([0, 0, dx, dx, 0], [dy, dy, dy, dy, dy], [0, dz, dz, 0, 0]);
block.insert (xfig_new_polygon(X));
return block;
}
#ifnexists urand
private variable Fast_Random = _time ();
private define urand (n)
{
variable x = Double_Type[n];
_for (0, n-1, 1)
{
variable i = ();
Fast_Random = Fast_Random * 69069U + 1013904243U;
x[i] = Fast_Random/4294967296.0;
}
return x;
}
#endif
define xfig_new_random_polyline (dx, dy, dz, max_points)
{
return xfig_new_ellipse (dx, dy);
variable x, y, z;
x = 2*(0.5-urand(max_points));
y = 2*(0.5-urand(max_points));
z = 2*(0.5-urand(max_points));
variable i = where (x*x + y*y + z*z < 1.0);
return xfig_new_polyline (vector (dx*x[i], dy*y[i], dz*z[i]));
}
% Created photon will have head at the origin and tail at dX
define xfig_new_photon (dX, amp, wavelength)
{
dX = vector_chs (dX);
variable x, y, z, t;
variable len = vector_norm (dX);
variable npts_per_wavelength = qualifier ("npts", 16);
z = [0:len:wavelength/(1.0*npts_per_wavelength)];
t = z*(2*PI/wavelength);
% For the arrow to look ok, make the amp fall off near the end
amp *= (1.0 - exp ((z-len)/(3*wavelength)));
x = amp*cos (t);
y = amp*sin (t);
variable v = vector (x, y, z);
variable n = crossprod(vector(0,0,1), dX);
normalize_vector (n);
variable cos_theta = dX.z/len;
v = vector_rotate (v, n, acos (cos_theta));
variable photon = xfig_new_polyline (v);
variable a = xfig_new_arrow_head (0.5*wavelength, wavelength, dX);
dX = vector_chs (dX);
photon.translate (dX);
a.translate (dX*(wavelength/len));
return xfig_new_compound (photon, a);
}
% Neither of these functions work too well --- avoid them
define xfig_new_labeled_arrow (dX, label)
{
variable height = 0.1, width = 0.05;
variable p = xfig_new_polyline (vector([0,dX.x], [0,dX.y], [0,dX.z])
;; __qualifiers);
variable a = xfig_new_arrow_head (width, height, dX;; __qualifiers);
a.translate ((1.0-height)*dX);
if (label != NULL)
{
label = xfig_new_text (label ;;__qualifiers);
variable dx, dy;
(dx, dy) = label.get_pict_bbox ();
label.translate (1.05*dX + vector (dX.x*dx, dy, 0));
}
return xfig_new_compound (p, a, label);
}
define xfig_new_3d_axis (xlabel, ylabel, zlabel)
{
variable e1 = xfig_new_labeled_arrow (vector(1,0,0), xlabel;; __qualifiers);
variable e2 = xfig_new_labeled_arrow (vector(0,1,0), ylabel;; __qualifiers);
variable e3 = xfig_new_labeled_arrow (vector(0,0,1), zlabel;; __qualifiers);
return xfig_new_compound (e1, e2, e3);
}
define xfig_new_hedgehog (radius, n)
{
variable h = xfig_new_polyline_list ();
variable phis = 2*PI*urand (n);
variable thetas = acos (2.0*urand (n)-1);
variable xs = sin(thetas);
variable ys = xs*sin(phis); xs *= cos(phis);
variable zs = cos(thetas);
_for (0, n-1, 1)
{
variable i = ();
variable x = xs[i], y = ys[i], z = zs[i];
h.insert (vector ([-x,x], [-y,y], [-z,z]));
}
return h;
}
define xfig_new_polyline_with_arrow (X, width, height)
{
variable x = X.x, y = X.y, z = X.z;
if (length (x) < 2)
verror ("xfig_new_arrow: need at least 2 points");
variable line = xfig_new_polyline (X);
X = vector (x[-1], y[-1], z[-1]);
variable dX = vector_diff (X, vector (x[-2], y[-2], z[-2]));
variable a = xfig_new_arrow_head (width, height, dX);
normalize_vector (dX);
%xfig_translate_object (a, X);
a.translate (vector_diff (X, vector_mul (height, dX)));
return xfig_new_compound (line, a);
}
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