| 1 |
root |
1.1 |
/* |
| 2 |
|
|
* l-system interpreters |
| 3 |
|
|
*/ |
| 4 |
|
|
|
| 5 |
|
|
#include "config.h" |
| 6 |
|
|
|
| 7 |
|
|
#include "lsys.h" |
| 8 |
|
|
#include "interp.h" |
| 9 |
|
|
#include "interface.h" |
| 10 |
|
|
#include "attr.h" |
| 11 |
|
|
|
| 12 |
|
|
#include <cstdlib> |
| 13 |
|
|
#include <cmath> |
| 14 |
|
|
#include <iostream> |
| 15 |
|
|
|
| 16 |
|
|
#ifndef M_PI |
| 17 |
|
|
# define M_PI 3.14159265358979323846 /* pi */ |
| 18 |
|
|
#endif |
| 19 |
|
|
|
| 20 |
|
|
bool interpreter::execute_child (const module &m, const lsys &l) t_err |
| 21 |
|
|
{ |
| 22 |
|
|
hash_map<string, lsys *>::const_iterator i; |
| 23 |
|
|
const lsys *sys = &l; |
| 24 |
|
|
|
| 25 |
|
|
do { |
| 26 |
|
|
if ((i = sys->sub_lsys.find (m.str)) != sys->sub_lsys.end ()) |
| 27 |
|
|
{ |
| 28 |
|
|
module_vec v = m.wrap (); |
| 29 |
|
|
|
| 30 |
|
|
if (i->second->eval (v)) |
| 31 |
|
|
{ |
| 32 |
|
|
execute (v, *i->second); |
| 33 |
|
|
return true; |
| 34 |
|
|
} |
| 35 |
|
|
|
| 36 |
|
|
break; |
| 37 |
|
|
} |
| 38 |
|
|
|
| 39 |
|
|
sys = sys->parent; |
| 40 |
|
|
} while (sys); |
| 41 |
|
|
|
| 42 |
|
|
return false; |
| 43 |
|
|
} |
| 44 |
|
|
|
| 45 |
|
|
void simple_interpreter::execute(const module_vec &v, const lsys &l) t_err |
| 46 |
|
|
{ |
| 47 |
|
|
depth--; |
| 48 |
|
|
|
| 49 |
|
|
string s; |
| 50 |
|
|
module m; |
| 51 |
|
|
|
| 52 |
|
|
for (module_pos i = v.begin (); i != v.end(); ++i) |
| 53 |
|
|
if (!depth || !execute_child (*i, l)) |
| 54 |
|
|
cout << *i << " "; |
| 55 |
|
|
|
| 56 |
|
|
depth++; |
| 57 |
|
|
} |
| 58 |
|
|
|
| 59 |
|
|
void simple_interpreter::operator ()(const module_vec &v, const lsys &l) t_err |
| 60 |
|
|
{ |
| 61 |
|
|
if (maxdepth > 0) |
| 62 |
|
|
{ |
| 63 |
|
|
depth = maxdepth + 1; |
| 64 |
|
|
execute (v, l); |
| 65 |
|
|
cout << endl; |
| 66 |
|
|
} |
| 67 |
|
|
} |
| 68 |
|
|
|
| 69 |
|
|
#define MK(m) point((m), cur.pos, cur.dir[2], cur.attr) |
| 70 |
|
|
|
| 71 |
|
|
turtle_interpreter::turtle_interpreter (gfx_int &interface, bool flat_world) t_no |
| 72 |
|
|
: iface (interface), flat(flat_world) |
| 73 |
|
|
{ |
| 74 |
|
|
} |
| 75 |
|
|
|
| 76 |
|
|
void turtle_interpreter::rotate_tl (double phi) t_no |
| 77 |
|
|
{ |
| 78 |
|
|
phi *= M_PI/180; |
| 79 |
|
|
double s = sin (phi), |
| 80 |
|
|
c = cos (phi); |
| 81 |
|
|
cur.dir = mat ( vec ( c, s, 0), |
| 82 |
|
|
vec (-s, c, 0), |
| 83 |
|
|
vec ( 0, 0, 1)) * cur.dir; |
| 84 |
|
|
} |
| 85 |
|
|
|
| 86 |
|
|
void turtle_interpreter::rotate_pd (double phi) t_no |
| 87 |
|
|
{ |
| 88 |
|
|
if (flat) return; |
| 89 |
|
|
|
| 90 |
|
|
phi *= M_PI/180; |
| 91 |
|
|
double s = sin (phi), |
| 92 |
|
|
c = cos (phi); |
| 93 |
|
|
cur.dir = mat ( vec ( c, 0,-s), |
| 94 |
|
|
vec ( 0, 1, 0), |
| 95 |
|
|
vec ( s, 0, c)) * cur.dir; |
| 96 |
|
|
} |
| 97 |
|
|
|
| 98 |
|
|
void turtle_interpreter::rotate_rl (double phi) t_no |
| 99 |
|
|
{ |
| 100 |
|
|
if (flat) return; |
| 101 |
|
|
|
| 102 |
|
|
phi *= M_PI/180; |
| 103 |
|
|
double s = sin (phi), |
| 104 |
|
|
c = cos (phi); |
| 105 |
|
|
cur.dir = mat ( vec ( 1, 0, 0), |
| 106 |
|
|
vec ( 0, c, s), |
| 107 |
|
|
vec ( 0,-s, c)) * cur.dir; |
| 108 |
|
|
} |
| 109 |
|
|
|
| 110 |
|
|
void turtle_interpreter::forward (double d) t_no |
| 111 |
|
|
{ |
| 112 |
|
|
cur.pos = cur.pos + d * cur.dir[0]; |
| 113 |
|
|
} |
| 114 |
|
|
|
| 115 |
|
|
void turtle_interpreter::attrs_changed () t_err |
| 116 |
|
|
{ |
| 117 |
|
|
delta = cur.attr("delta", 45); |
| 118 |
|
|
distance = cur.attr("distance", 10); |
| 119 |
|
|
} |
| 120 |
|
|
|
| 121 |
|
|
void turtle_interpreter::execute (const module_vec &v, const lsys &l) t_err |
| 122 |
|
|
{ |
| 123 |
|
|
// cout << "interp " << v << endl; |
| 124 |
|
|
string s; |
| 125 |
|
|
double d; |
| 126 |
|
|
module m; |
| 127 |
|
|
const module_vec damnit; |
| 128 |
|
|
|
| 129 |
|
|
for (module_pos i = v.begin (); i != v.end (); ++i) |
| 130 |
|
|
{ |
| 131 |
|
|
// cout << delta << "|" << distance << "> " << cur.pos << " " << cur.dir << " " << i->str << endl; |
| 132 |
|
|
if (i->is_func ("[")) |
| 133 |
|
|
{ |
| 134 |
|
|
state_stack.push (cur); |
| 135 |
|
|
} |
| 136 |
|
|
else if (i->is_func ("]")) |
| 137 |
|
|
{ |
| 138 |
|
|
cur = state_stack.top (), state_stack.pop (); |
| 139 |
|
|
attrs_changed (); |
| 140 |
|
|
} |
| 141 |
|
|
else if (i->is_func ("attr", s, m)) |
| 142 |
|
|
{ |
| 143 |
|
|
if (m.is_expr) |
| 144 |
|
|
m = module (eval_expr (m, cur.attr)); |
| 145 |
|
|
|
| 146 |
|
|
cur.attr[s] = m; |
| 147 |
|
|
attrs_changed (); |
| 148 |
|
|
} |
| 149 |
|
|
else if (i->is_func ("+")) |
| 150 |
|
|
rotate_tl (delta); |
| 151 |
|
|
else if (i->is_func ("-")) |
| 152 |
|
|
rotate_tl (-delta); |
| 153 |
|
|
else if (i->is_func ("+", d)) |
| 154 |
|
|
rotate_tl (d); |
| 155 |
|
|
else if (i->is_func ("-", d)) |
| 156 |
|
|
rotate_tl (-d); |
| 157 |
|
|
else if (i->is_func ("&")) |
| 158 |
|
|
rotate_pd (delta); |
| 159 |
|
|
else if (i->is_func ("^")) |
| 160 |
|
|
rotate_pd (-delta); |
| 161 |
|
|
else if (i->is_func ("&", d)) |
| 162 |
|
|
rotate_pd (d); |
| 163 |
|
|
else if (i->is_func ("^", d)) |
| 164 |
|
|
rotate_pd (-d); |
| 165 |
|
|
else if (i->is_func ("\\")) |
| 166 |
|
|
rotate_rl (delta); |
| 167 |
|
|
else if (i->is_func ("/")) |
| 168 |
|
|
rotate_rl (-delta); |
| 169 |
|
|
else if (i->is_func ("\\", d)) |
| 170 |
|
|
rotate_rl (d); |
| 171 |
|
|
else if (i->is_func ("/", d)) |
| 172 |
|
|
rotate_rl (-d); |
| 173 |
|
|
else if (i->is_func ("|")) |
| 174 |
|
|
rotate_tl (180); |
| 175 |
|
|
else if (i->is_func ("f")) |
| 176 |
|
|
forward (distance); |
| 177 |
|
|
else if (i->is_func ("f", d)) |
| 178 |
|
|
forward (d); |
| 179 |
|
|
else if (i->is_func ("F")) |
| 180 |
|
|
{ |
| 181 |
|
|
if (obj_stack.empty ()) |
| 182 |
|
|
{ |
| 183 |
|
|
point o(MK(damnit)); forward (distance); iface.segment (o, MK(damnit)); |
| 184 |
|
|
} |
| 185 |
|
|
else |
| 186 |
|
|
{ |
| 187 |
|
|
forward (distance); cur_obj.push_back (MK(damnit)); |
| 188 |
|
|
} |
| 189 |
|
|
} |
| 190 |
|
|
else if (i->is_func ("F", d)) |
| 191 |
|
|
{ |
| 192 |
|
|
if (obj_stack.empty ()) |
| 193 |
|
|
{ |
| 194 |
|
|
point o(MK(damnit)); forward (d); iface.segment (o, MK(damnit)); |
| 195 |
|
|
} |
| 196 |
|
|
else |
| 197 |
|
|
{ |
| 198 |
|
|
forward (d); cur_obj.push_back (MK(damnit)); |
| 199 |
|
|
} |
| 200 |
|
|
} |
| 201 |
|
|
else if (i->is_func (".")) |
| 202 |
|
|
cur_obj.push_back (MK(*i)); |
| 203 |
|
|
else if (i->is_func ("{")) |
| 204 |
|
|
{ |
| 205 |
|
|
obj_stack.push (cur_obj); |
| 206 |
|
|
cur_obj.erase (cur_obj.begin (), cur_obj.end ()); |
| 207 |
|
|
} |
| 208 |
|
|
else if (i->is_func ("}")) |
| 209 |
|
|
{ |
| 210 |
|
|
iface.object (cur_obj); |
| 211 |
|
|
if (obj_stack.empty ()) |
| 212 |
|
|
throw error ("polygon stack underflow", *i); |
| 213 |
|
|
else |
| 214 |
|
|
{ |
| 215 |
|
|
cur_obj = obj_stack.top (); |
| 216 |
|
|
obj_stack.pop (); |
| 217 |
|
|
} |
| 218 |
|
|
} |
| 219 |
|
|
else |
| 220 |
|
|
execute_child (*i, l); |
| 221 |
|
|
} |
| 222 |
|
|
} |
| 223 |
|
|
|
| 224 |
|
|
void turtle_interpreter::operator ()(const module_vec &v, const lsys &l) t_err |
| 225 |
|
|
{ |
| 226 |
|
|
cur.pos = vec(0, 0, 0); |
| 227 |
|
|
cur.dir = mat (vec ( 0, 1, 0), |
| 228 |
|
|
vec ( 1, 0, 0), |
| 229 |
|
|
vec ( 0, 0, 1)); |
| 230 |
|
|
|
| 231 |
|
|
srand (1); // zero breaks certain libc versins |
| 232 |
|
|
|
| 233 |
|
|
cur.attr["delta"] = 45.0; |
| 234 |
|
|
cur.attr["distance"] = 10.0; |
| 235 |
|
|
attrs_changed (); |
| 236 |
|
|
|
| 237 |
|
|
iface.begin_fig (); |
| 238 |
|
|
execute (v, l); |
| 239 |
|
|
iface.end_fig (); |
| 240 |
|
|
} |
| 241 |
|
|
|
