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 |
|
|
|