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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
** $Id: lmathlib.cpp 935 2008-07-26 18:11:55Z aquadran $
** Lua standard mathematical library
** See Copyright Notice in lua.h
*/
#include "lauxlib.h"
#include "lua.h"
#include "lualib.h"
#ifndef LOCAL_PI
#define LOCAL_PI (3.14159265358979323846)
#endif
#define FROMRAD(a) ((a)*(180.0/LOCAL_PI))
#define TORAD(a) ((a)*(LOCAL_PI/180.0))
static void math_abs (void)
{
double d = luaL_check_number(1);
if (d < 0) d = -d;
lua_pushnumber(d);
}
static void math_sin (void)
{
lua_pushnumber(sin(TORAD(luaL_check_number(1))));
}
static void math_cos (void)
{
lua_pushnumber(cos(TORAD(luaL_check_number(1))));
}
static void math_tan (void)
{
lua_pushnumber(tan(TORAD(luaL_check_number(1))));
}
static void math_asin (void)
{
lua_pushnumber(FROMRAD(asin(luaL_check_number(1))));
}
static void math_acos (void)
{
lua_pushnumber(FROMRAD(acos(luaL_check_number(1))));
}
static void math_atan (void)
{
lua_pushnumber(FROMRAD(atan(luaL_check_number(1))));
}
static void math_atan2 (void)
{
lua_pushnumber(FROMRAD(atan2(luaL_check_number(1), luaL_check_number(2))));
}
static void math_ceil (void)
{
lua_pushnumber(ceil(luaL_check_number(1)));
}
static void math_floor (void)
{
lua_pushnumber(floor(luaL_check_number(1)));
}
static void math_mod (void)
{
lua_pushnumber(fmod(luaL_check_number(1), luaL_check_number(2)));
}
static void math_sqrt (void)
{
lua_pushnumber(sqrt(luaL_check_number(1)));
}
static void math_pow (void)
{
lua_pushnumber(pow(luaL_check_number(1), luaL_check_number(2)));
}
static void math_log (void)
{
lua_pushnumber(log(luaL_check_number(1)));
}
static void math_log10 (void)
{
lua_pushnumber(log10(luaL_check_number(1)));
}
static void math_exp (void)
{
lua_pushnumber(exp(luaL_check_number(1)));
}
static void math_deg (void)
{
lua_pushnumber(luaL_check_number(1)*(180.0/LOCAL_PI));
}
static void math_rad (void)
{
lua_pushnumber(luaL_check_number(1)*(LOCAL_PI/180.0));
}
static void math_frexp (void) {
int e;
lua_pushnumber(frexp(luaL_check_number(1), &e));
lua_pushnumber(e);
}
static void math_ldexp (void) {
lua_pushnumber(ldexp(luaL_check_number(1), (int32)luaL_check_number(2)));
}
static void math_min (void)
{
int32 i = 1;
double dmin = luaL_check_number(i);
while (lua_getparam(++i) != LUA_NOOBJECT) {
double d = luaL_check_number(i);
if (d < dmin)
dmin = d;
}
lua_pushnumber(dmin);
}
static void math_max (void)
{
int32 i = 1;
double dmax = luaL_check_number(i);
while (lua_getparam(++i) != LUA_NOOBJECT) {
double d = luaL_check_number(i);
if (d > dmax)
dmax = d;
}
lua_pushnumber(dmax);
}
static void math_random (void)
{
/* the '%' is needed because on some systems (SunOS!) "rand()" may */
/* return a value bigger than RAND_MAX... */
double r = (double)(rand()%RAND_MAX) / (double)RAND_MAX;
double l = luaL_opt_number(1, 0);
if (l == 0)
lua_pushnumber(r);
else
lua_pushnumber((int32)(r*l)+1);
}
static void math_randomseed (void)
{
srand((unsigned int)luaL_check_number(1));
}
static struct luaL_reg mathlib[] = {
{"abs", math_abs},
{"sin", math_sin},
{"cos", math_cos},
{"tan", math_tan},
{"asin", math_asin},
{"acos", math_acos},
{"atan", math_atan},
{"atan2", math_atan2},
{"ceil", math_ceil},
{"floor", math_floor},
{"mod", math_mod},
{"frexp", math_frexp},
{"ldexp", math_ldexp},
{"sqrt", math_sqrt},
{"min", math_min},
{"max", math_max},
{"log", math_log},
{"log10", math_log10},
{"exp", math_exp},
{"deg", math_deg},
{"rad", math_rad},
{"random", math_random},
{"randomseed", math_randomseed}
};
static luaL_reg powFunc[] = {
{"math_pow", math_pow}
};
/*
** Open math library
*/
void lua_mathlibopen (void)
{
luaL_openlib(mathlib, (sizeof(mathlib)/sizeof(mathlib[0])));
luaL_addlibtolist(powFunc, (sizeof(powFunc)/sizeof(powFunc[0])));
lua_pushstring("deg"); lua_setglobal("_TRIGMODE");
lua_pushcfunction(math_pow);
lua_pushnumber(0); /* to get its tag */
lua_settagmethod(lua_tag(lua_pop()), "pow");
lua_pushnumber(LOCAL_PI); lua_setglobal("PI");
}
|
