author | rubidium |
Thu, 01 Feb 2007 15:49:12 +0000 | |
changeset 5893 | 7e431a4abebb |
parent 5622 | 1361c4bd1774 |
child 6247 | 7d81e3a5d803 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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#include "stdafx.h" |
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#include "openttd.h" |
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#include "variables.h" |
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#include "macros.h" |
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#include "oldpool.h" |
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#include "newgrf_callbacks.h" |
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#include "newgrf_spritegroup.h" |
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#include "date.h" |
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static void SpriteGroupPoolCleanBlock(uint start_item, uint end_item); |
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static uint _spritegroup_count = 0; |
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STATIC_OLD_POOL(SpriteGroup, SpriteGroup, 9, 250, NULL, SpriteGroupPoolCleanBlock) |
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static void DestroySpriteGroup(SpriteGroup *group) |
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{ |
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/* Free dynamically allocated memory */ |
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/* XXX Cast away the consts due to MSVC being buggy... */ |
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switch (group->type) { |
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case SGT_REAL: |
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free((SpriteGroup**)group->g.real.loaded); |
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free((SpriteGroup**)group->g.real.loading); |
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break; |
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|
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case SGT_DETERMINISTIC: |
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free(group->g.determ.adjusts); |
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free(group->g.determ.ranges); |
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break; |
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|
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case SGT_RANDOMIZED: |
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free((SpriteGroup**)group->g.random.groups); |
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break; |
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default: |
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break; |
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} |
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} |
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static void SpriteGroupPoolCleanBlock(uint start_item, uint end_item) |
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{ |
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uint i; |
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for (i = start_item; i <= end_item; i++) { |
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DestroySpriteGroup(GetSpriteGroup(i)); |
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} |
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} |
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/* Allocate a new SpriteGroup */ |
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SpriteGroup *AllocateSpriteGroup(void) |
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{ |
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/* This is totally different to the other pool allocators, as we never remove an item from the pool. */ |
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if (_spritegroup_count == GetSpriteGroupPoolSize()) { |
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if (!AddBlockToPool(&_SpriteGroup_pool)) return NULL; |
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} |
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return GetSpriteGroup(_spritegroup_count++); |
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} |
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void InitializeSpriteGroupPool(void) |
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{ |
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CleanPool(&_SpriteGroup_pool); |
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_spritegroup_count = 0; |
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} |
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static inline uint32 GetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available) |
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{ |
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/* Return common variables */ |
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switch (variable) { |
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case 0x00: return max(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0); |
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case 0x01: return clamp(_cur_year, ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR) - ORIGINAL_BASE_YEAR; |
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case 0x02: return _cur_month; |
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case 0x03: return _opt.landscape; |
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case 0x09: return _date_fract; |
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case 0x0A: return _tick_counter; |
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case 0x0C: return object->callback; |
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case 0x10: return object->callback_param1; |
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case 0x11: return 0; |
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case 0x18: return object->callback_param2; |
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case 0x1A: return UINT_MAX; |
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case 0x1B: return GB(_display_opt, 0, 6); |
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case 0x1C: return object->last_value; |
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case 0x20: return _opt.landscape == LT_HILLY ? _opt.snow_line : 0xFF; |
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89 |
|
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90 |
/* Not a common variable, so evalute the feature specific variables */ |
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default: return object->GetVariable(object, variable, parameter, available); |
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92 |
} |
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93 |
} |
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94 |
|
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95 |
|
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96 |
/* Evaluate an adjustment for a variable of the given size. |
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* U is the unsigned type and S is the signed type to use. */ |
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template <typename U, typename S> |
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static U EvalAdjustT(const DeterministicSpriteGroupAdjust *adjust, U last_value, uint32 value) |
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100 |
{ |
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101 |
value >>= adjust->shift_num; |
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102 |
value &= adjust->and_mask; |
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103 |
|
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104 |
if (adjust->type != DSGA_TYPE_NONE) value += (S)adjust->add_val; |
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105 |
|
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106 |
switch (adjust->type) { |
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107 |
case DSGA_TYPE_DIV: value /= (S)adjust->divmod_val; break; |
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|
108 |
case DSGA_TYPE_MOD: value %= (U)adjust->divmod_val; break; |
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109 |
case DSGA_TYPE_NONE: break; |
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110 |
} |
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|
111 |
|
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112 |
switch (adjust->operation) { |
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113 |
case DSGA_OP_ADD: return last_value + value; |
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|
114 |
case DSGA_OP_SUB: return last_value - value; |
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115 |
case DSGA_OP_SMIN: return min((S)last_value, (S)value); |
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116 |
case DSGA_OP_SMAX: return max((S)last_value, (S)value); |
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117 |
case DSGA_OP_UMIN: return min((U)last_value, (U)value); |
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118 |
case DSGA_OP_UMAX: return max((U)last_value, (U)value); |
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119 |
case DSGA_OP_SDIV: return (S)last_value / (S)value; |
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120 |
case DSGA_OP_SMOD: return (S)last_value % (S)value; |
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121 |
case DSGA_OP_UDIV: return (U)last_value / (U)value; |
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122 |
case DSGA_OP_UMOD: return (U)last_value % (U)value; |
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123 |
case DSGA_OP_MUL: return last_value * value; |
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124 |
case DSGA_OP_AND: return last_value & value; |
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125 |
case DSGA_OP_OR: return last_value | value; |
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126 |
case DSGA_OP_XOR: return last_value ^ value; |
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127 |
default: return value; |
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128 |
} |
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129 |
} |
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130 |
|
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131 |
|
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132 |
static inline const SpriteGroup *ResolveVariable(const SpriteGroup *group, ResolverObject *object) |
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133 |
{ |
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134 |
static SpriteGroup nvarzero; |
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|
135 |
uint32 last_value = 0; |
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136 |
uint32 value = 0; |
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137 |
uint i; |
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|
138 |
|
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|
139 |
object->scope = group->g.determ.var_scope; |
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|
140 |
|
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|
141 |
for (i = 0; i < group->g.determ.num_adjusts; i++) { |
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|
142 |
DeterministicSpriteGroupAdjust *adjust = &group->g.determ.adjusts[i]; |
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|
143 |
|
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|
144 |
/* Try to get the variable. We shall assume it is available, unless told otherwise. */ |
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|
145 |
bool available = true; |
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|
146 |
if (adjust->variable == 0x7E) { |
5622
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|
147 |
ResolverObject subobject = *object; |
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|
148 |
const SpriteGroup *subgroup = Resolve(adjust->subroutine, &subobject); |
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|
149 |
if (subgroup == NULL || subgroup->type != SGT_CALLBACK) { |
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150 |
value = CALLBACK_FAILED; |
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|
151 |
} else { |
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152 |
value = subgroup->g.callback.result; |
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153 |
} |
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154 |
} else { |
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|
155 |
value = GetVariable(object, adjust->variable, adjust->parameter, &available); |
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156 |
} |
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|
157 |
|
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|
158 |
if (!available) { |
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|
159 |
/* Unsupported property: skip further processing and return either |
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|
160 |
* the group from the first range or the default group. */ |
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|
161 |
return Resolve(group->g.determ.num_ranges > 0 ? group->g.determ.ranges[0].group : group->g.determ.default_group, object); |
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|
162 |
} |
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|
163 |
|
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|
164 |
switch (group->g.determ.size) { |
5600
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|
165 |
case DSG_SIZE_BYTE: value = EvalAdjustT<uint8, int8>(adjust, last_value, value); break; |
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|
166 |
case DSG_SIZE_WORD: value = EvalAdjustT<uint16, int16>(adjust, last_value, value); break; |
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|
167 |
case DSG_SIZE_DWORD: value = EvalAdjustT<uint32, int32>(adjust, last_value, value); break; |
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|
168 |
default: NOT_REACHED(); break; |
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169 |
} |
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|
170 |
last_value = value; |
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|
171 |
} |
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|
172 |
|
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|
173 |
object->last_value = last_value; |
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|
174 |
|
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|
175 |
if (group->g.determ.num_ranges == 0) { |
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|
176 |
/* nvar == 0 is a special case -- we turn our value into a callback result */ |
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|
177 |
nvarzero.type = SGT_CALLBACK; |
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|
178 |
nvarzero.g.callback.result = GB(value, 0, 15); |
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|
179 |
return &nvarzero; |
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|
180 |
} |
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|
181 |
|
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|
182 |
for (i = 0; i < group->g.determ.num_ranges; i++) { |
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|
183 |
if (group->g.determ.ranges[i].low <= value && value <= group->g.determ.ranges[i].high) { |
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|
184 |
return Resolve(group->g.determ.ranges[i].group, object); |
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|
185 |
} |
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|
186 |
} |
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|
187 |
|
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|
188 |
return Resolve(group->g.determ.default_group, object); |
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189 |
} |
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|
190 |
|
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|
191 |
|
3686
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|
192 |
static inline const SpriteGroup *ResolveRandom(const SpriteGroup *group, ResolverObject *object) |
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|
193 |
{ |
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|
194 |
uint32 mask; |
3677
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|
195 |
byte index; |
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|
196 |
|
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|
197 |
object->scope = group->g.random.var_scope; |
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|
198 |
|
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|
199 |
if (object->trigger != 0) { |
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|
200 |
/* Handle triggers */ |
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|
201 |
/* Magic code that may or may not do the right things... */ |
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|
202 |
byte waiting_triggers = object->GetTriggers(object); |
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|
203 |
byte match = group->g.random.triggers & (waiting_triggers | object->trigger); |
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|
204 |
bool res; |
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|
205 |
|
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|
206 |
res = (group->g.random.cmp_mode == RSG_CMP_ANY) ? |
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|
207 |
(match != 0) : (match == group->g.random.triggers); |
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|
208 |
|
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if (res) { |
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waiting_triggers &= ~match; |
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object->reseed |= (group->g.random.num_groups - 1) << group->g.random.lowest_randbit; |
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} else { |
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waiting_triggers |= object->trigger; |
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} |
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|
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object->SetTriggers(object, waiting_triggers); |
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} |
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|
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mask = (group->g.random.num_groups - 1) << group->g.random.lowest_randbit; |
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index = (object->GetRandomBits(object) & mask) >> group->g.random.lowest_randbit; |
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|
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return Resolve(group->g.random.groups[index], object); |
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} |
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|
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|
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/* ResolverObject (re)entry point */ |
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const SpriteGroup *Resolve(const SpriteGroup *group, ResolverObject *object) |
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{ |
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/* We're called even if there is no group, so quietly return nothing */ |
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if (group == NULL) return NULL; |
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|
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switch (group->type) { |
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case SGT_REAL: return object->ResolveReal(object, group); |
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case SGT_DETERMINISTIC: return ResolveVariable(group, object); |
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case SGT_RANDOMIZED: return ResolveRandom(group, object); |
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default: return group; |
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} |
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} |