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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
|
/**
* @file lldefs.h
* @brief Various generic constant definitions.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLDEFS_H
#define LL_LLDEFS_H
#include "stdtypes.h"
#include <cassert>
#include <type_traits>
// Often used array indices
constexpr U32 VX = 0;
constexpr U32 VY = 1;
constexpr U32 VZ = 2;
constexpr U32 VW = 3;
constexpr U32 VS = 3;
constexpr U32 VRED = 0;
constexpr U32 VGREEN = 1;
constexpr U32 VBLUE = 2;
constexpr U32 VALPHA = 3;
constexpr U32 INVALID_DIRECTION = 0xFFFFFFFF;
constexpr U32 EAST = 0;
constexpr U32 NORTH = 1;
constexpr U32 WEST = 2;
constexpr U32 SOUTH = 3;
constexpr U32 NORTHEAST = 4;
constexpr U32 NORTHWEST = 5;
constexpr U32 SOUTHWEST = 6;
constexpr U32 SOUTHEAST = 7;
constexpr U32 MIDDLE = 8;
constexpr U8 EAST_MASK = 0x1<<EAST;
constexpr U8 NORTH_MASK = 0x1<<NORTH;
constexpr U8 WEST_MASK = 0x1<<WEST;
constexpr U8 SOUTH_MASK = 0x1<<SOUTH;
constexpr U8 NORTHEAST_MASK = NORTH_MASK | EAST_MASK;
constexpr U8 NORTHWEST_MASK = NORTH_MASK | WEST_MASK;
constexpr U8 SOUTHWEST_MASK = SOUTH_MASK | WEST_MASK;
constexpr U8 SOUTHEAST_MASK = SOUTH_MASK | EAST_MASK;
constexpr U32 gDirOpposite[8] = {2, 3, 0, 1, 6, 7, 4, 5};
constexpr U32 gDirAdjacent[8][2] = {
{4, 7},
{4, 5},
{5, 6},
{6, 7},
{0, 1},
{1, 2},
{2, 3},
{0, 3}
};
// Magnitude along the x and y axis
constexpr S32 gDirAxes[8][2] = {
{ 1, 0}, // east
{ 0, 1}, // north
{-1, 0}, // west
{ 0,-1}, // south
{ 1, 1}, // ne
{-1, 1}, // nw
{-1,-1}, // sw
{ 1,-1}, // se
};
constexpr S32 gDirMasks[8] = {
EAST_MASK,
NORTH_MASK,
WEST_MASK,
SOUTH_MASK,
NORTHEAST_MASK,
NORTHWEST_MASK,
SOUTHWEST_MASK,
SOUTHEAST_MASK
};
// Sides of a box...
// . Z __.Y
// /|\ /| 0 = NO_SIDE
// | / 1 = FRONT_SIDE = +x
// +------|-----------+ 2 = BACK_SIDE = -x
// /| |/ / /| 3 = LEFT_SIDE = +y
// / | -5- |/ / | 4 = RIGHT_SIDE = -y
// / | /| -3- / | 5 = TOP_SIDE = +z
// +------------------+ | 6 = BOTTOM_SIDE = -z
// | | | / | |
// | |/| | / | |/|
// | 2 | | *-------|-1--------> X
// |/| | -4- |/| |
// | +----|---------|---+
// | / / | /
// | / -6- | /
// |/ / |/
// +------------------+
constexpr U32 NO_SIDE = 0;
constexpr U32 FRONT_SIDE = 1;
constexpr U32 BACK_SIDE = 2;
constexpr U32 LEFT_SIDE = 3;
constexpr U32 RIGHT_SIDE = 4;
constexpr U32 TOP_SIDE = 5;
constexpr U32 BOTTOM_SIDE = 6;
constexpr U8 LL_SOUND_FLAG_NONE = 0x0;
constexpr U8 LL_SOUND_FLAG_LOOP = 1<<0;
constexpr U8 LL_SOUND_FLAG_SYNC_MASTER = 1<<1;
constexpr U8 LL_SOUND_FLAG_SYNC_SLAVE = 1<<2;
constexpr U8 LL_SOUND_FLAG_SYNC_PENDING = 1<<3;
constexpr U8 LL_SOUND_FLAG_QUEUE = 1<<4;
constexpr U8 LL_SOUND_FLAG_STOP = 1<<5;
constexpr U8 LL_SOUND_FLAG_SYNC_MASK = LL_SOUND_FLAG_SYNC_MASTER | LL_SOUND_FLAG_SYNC_SLAVE | LL_SOUND_FLAG_SYNC_PENDING;
//
// *NOTE: These values may be used as hard-coded numbers in scanf() variants.
//
// --------------
// DO NOT CHANGE.
// --------------
//
constexpr U32 LL_MAX_PATH = 1024; // buffer size of maximum path + filename string length
// For strings we send in messages
constexpr U32 STD_STRING_BUF_SIZE = 255; // Buffer size
constexpr U32 STD_STRING_STR_LEN = 254; // Length of the string (not including \0)
// *NOTE: This value is used as hard-coded numbers in scanf() variants.
// DO NOT CHANGE.
constexpr U32 MAX_STRING = STD_STRING_BUF_SIZE; // Buffer size
constexpr U32 MAXADDRSTR = 17; // 123.567.901.345 = 15 chars + \0 + 1 for good luck
// C++ is our friend. . . use template functions to make life easier!
// specific inlines for basic types
//
// defined for all:
// llmin(a,b)
// llmax(a,b)
// llclamp(a,minimum,maximum)
//
// defined for F32, F64:
// llclampf(a) // clamps a to [0.0 .. 1.0]
//
// defined for U16, U32, U64, S16, S32, S64, :
// llclampb(a) // clamps a to [0 .. 255]
//
// llless(d0, d1) safely compares d0 < d1 even if one is signed and the other
// is unsigned. A simple (d0 < d1) expression converts the signed operand to
// unsigned before comparing. If the signed operand is negative, that flips
// the negative value to a huge positive value, producing the wrong answer!
// llless() specifically addresses that case.
template <typename T0, typename T1>
constexpr bool llless(T0 d0, T1 d1)
{
if constexpr (std::is_signed_v<T0> && ! std::is_signed_v<T1>)
{
// T0 signed, T1 unsigned: negative d0 is less than any unsigned d1
if (d0 < 0)
return true;
// both are non-negative: explicitly cast to avoid C4018
return std::make_unsigned_t<T0>(d0) < d1;
}
else if constexpr (! std::is_signed_v<T0> && std::is_signed_v<T1>)
{
// T0 unsigned, T1 signed: any unsigned d0 is greater than negative d1
if (d1 < 0)
return false;
// both are non-negative: explicitly cast to avoid C4018
return d0 < std::make_unsigned_t<T1>(d1);
}
else
{
// both T0 and T1 are signed, or both are unsigned:
// straightforward comparison works
return d0 < d1;
}
}
// recursion tail
template <typename T>
constexpr auto llmax(T data)
{
return data;
}
template <typename T0, typename T1, typename... Ts>
constexpr auto llmax(T0 d0, T1 d1, Ts... rest)
{
auto maxrest = llmax(d1, rest...);
return llless(maxrest, d0)? d0 : maxrest;
}
// recursion tail
template <typename T>
constexpr auto llmin(T data)
{
return data;
}
template <typename T0, typename T1, typename... Ts>
constexpr auto llmin(T0 d0, T1 d1, Ts... rest)
{
auto minrest = llmin(d1, rest...);
return llless(d0, minrest) ? d0 : minrest;
}
template <typename A, typename MIN, typename MAX>
constexpr A llclamp(A a, MIN minval, MAX maxval)
{
// The only troublesome case is if A is unsigned and either minval or
// maxval is both signed and negative. Casting a negative number to
// unsigned flips it to a huge positive number, making this llclamp() call
// ineffective.
if constexpr (! std::is_signed_v<A>)
{
if constexpr (std::is_signed_v<MIN>)
{
assert(minval >= 0);
}
if constexpr (std::is_signed_v<MAX>)
{
assert(maxval >= 0);
}
}
A aminval{ static_cast<A>(minval) }, amaxval{ static_cast<A>(maxval) };
if ( a < aminval )
{
return aminval;
}
else if ( a > amaxval )
{
return amaxval;
}
return a;
}
template <class LLDATATYPE>
constexpr LLDATATYPE llclampf(LLDATATYPE a)
{
return llmin(llmax(a, LLDATATYPE(0)), LLDATATYPE(1));
}
template <class LLDATATYPE>
constexpr LLDATATYPE llclampb(LLDATATYPE a)
{
return llmin(llmax(a, LLDATATYPE(0)), LLDATATYPE(255));
}
template <class LLDATATYPE>
inline void llswap(LLDATATYPE& lhs, LLDATATYPE& rhs)
{
std::swap(lhs, rhs);
}
#endif // LL_LLDEFS_H
|
