author | rubidium |
Sat, 09 Dec 2006 14:18:08 +0000 | |
changeset 5299 | 5d613241ee5e |
parent 5216 | d581e4db95b6 |
child 5497 | b9c8c76d31b7 |
child 5642 | bfa6074e2833 |
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_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, 4, 8000, 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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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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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 -1; |
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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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/* 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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} |
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} |
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/* Evaluate an adjustment for a variable of the given size. This is a bit of |
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* an unwieldy macro, but it saves triplicating the code. */ |
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#define BUILD_EVAL_ADJUST(size, usize) \ |
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static inline usize EvalAdjust_ ## size(const DeterministicSpriteGroupAdjust *adjust, usize last_value, int32 value) \ |
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{ \ |
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value >>= adjust->shift_num; \ |
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value &= adjust->and_mask; \ |
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\ |
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if (adjust->type != DSGA_TYPE_NONE) value += (size)adjust->add_val; \ |
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\ |
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switch (adjust->type) { \ |
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case DSGA_TYPE_DIV: value /= (size)adjust->divmod_val; break; \ |
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case DSGA_TYPE_MOD: value %= (usize)adjust->divmod_val; break; \ |
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case DSGA_TYPE_NONE: break; \ |
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109 |
} \ |
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\ |
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111 |
/* Get our value to the correct range */ \ |
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112 |
value = (usize)value; \ |
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113 |
\ |
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114 |
switch (adjust->operation) { \ |
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115 |
case DSGA_OP_ADD: return last_value + value; \ |
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case DSGA_OP_SUB: return last_value - value; \ |
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case DSGA_OP_SMIN: return min(last_value, value); \ |
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118 |
case DSGA_OP_SMAX: return max(last_value, value); \ |
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119 |
case DSGA_OP_UMIN: return min((usize)last_value, (usize)value); \ |
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case DSGA_OP_UMAX: return max((usize)last_value, (usize)value); \ |
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121 |
case DSGA_OP_SDIV: return last_value / value; \ |
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122 |
case DSGA_OP_SMOD: return last_value % value; \ |
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123 |
case DSGA_OP_UDIV: return (usize)last_value / (usize)value; \ |
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124 |
case DSGA_OP_UMOD: return (usize)last_value % (usize)value; \ |
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case DSGA_OP_MUL: return last_value * value; \ |
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126 |
case DSGA_OP_AND: return last_value & value; \ |
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case DSGA_OP_OR: return last_value | value; \ |
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128 |
case DSGA_OP_XOR: return last_value ^ value; \ |
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129 |
default: return value; \ |
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130 |
} \ |
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131 |
} |
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132 |
|
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133 |
|
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134 |
BUILD_EVAL_ADJUST(int8, uint8) |
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135 |
BUILD_EVAL_ADJUST(int16, uint16) |
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136 |
BUILD_EVAL_ADJUST(int32, uint32) |
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137 |
|
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138 |
|
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139 |
static inline const SpriteGroup *ResolveVariable(const SpriteGroup *group, ResolverObject *object) |
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140 |
{ |
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141 |
static SpriteGroup nvarzero; |
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int32 last_value = object->last_value; |
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143 |
int32 value = -1; |
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144 |
uint i; |
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145 |
|
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146 |
object->scope = group->g.determ.var_scope; |
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147 |
|
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148 |
for (i = 0; i < group->g.determ.num_adjusts; i++) { |
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149 |
DeterministicSpriteGroupAdjust *adjust = &group->g.determ.adjusts[i]; |
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150 |
|
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151 |
/* Try to get the variable. We shall assume it is available, unless told otherwise. */ |
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152 |
bool available = true; |
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153 |
value = GetVariable(object, adjust->variable, adjust->parameter, &available); |
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154 |
|
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155 |
if (!available) { |
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156 |
/* Unsupported property: skip further processing and return either |
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157 |
* the group from the first range or the default group. */ |
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158 |
return Resolve(group->g.determ.num_ranges > 0 ? group->g.determ.ranges[0].group : group->g.determ.default_group, object); |
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159 |
} |
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160 |
|
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161 |
switch (group->g.determ.size) { |
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162 |
case DSG_SIZE_BYTE: value = EvalAdjust_int8(adjust, last_value, value); break; |
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163 |
case DSG_SIZE_WORD: value = EvalAdjust_int16(adjust, last_value, value); break; |
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164 |
case DSG_SIZE_DWORD: value = EvalAdjust_int32(adjust, last_value, value); break; |
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165 |
default: NOT_REACHED(); break; |
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166 |
} |
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167 |
last_value = value; |
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168 |
} |
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169 |
|
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170 |
if (group->g.determ.num_ranges == 0) { |
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171 |
/* nvar == 0 is a special case -- we turn our value into a callback result */ |
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172 |
nvarzero.type = SGT_CALLBACK; |
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173 |
nvarzero.g.callback.result = GB(value, 0, 15); |
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174 |
return &nvarzero; |
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175 |
} |
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176 |
|
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177 |
for (i = 0; i < group->g.determ.num_ranges; i++) { |
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178 |
if (group->g.determ.ranges[i].low <= (uint32)value && (uint32)value <= group->g.determ.ranges[i].high) { |
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179 |
return Resolve(group->g.determ.ranges[i].group, object); |
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180 |
} |
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181 |
} |
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182 |
|
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183 |
return Resolve(group->g.determ.default_group, object); |
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184 |
} |
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185 |
|
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186 |
|
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187 |
static inline const SpriteGroup *ResolveRandom(const SpriteGroup *group, ResolverObject *object) |
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188 |
{ |
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189 |
uint32 mask; |
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190 |
byte index; |
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191 |
|
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192 |
object->scope = group->g.random.var_scope; |
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193 |
|
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194 |
if (object->trigger != 0) { |
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195 |
/* Handle triggers */ |
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196 |
/* Magic code that may or may not do the right things... */ |
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197 |
byte waiting_triggers = object->GetTriggers(object); |
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198 |
byte match = group->g.random.triggers & (waiting_triggers | object->trigger); |
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199 |
bool res; |
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200 |
|
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201 |
res = (group->g.random.cmp_mode == RSG_CMP_ANY) ? |
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202 |
(match != 0) : (match == group->g.random.triggers); |
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|
203 |
|
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204 |
if (res) { |
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205 |
waiting_triggers &= ~match; |
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206 |
object->reseed |= (group->g.random.num_groups - 1) << group->g.random.lowest_randbit; |
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207 |
} else { |
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208 |
waiting_triggers |= object->trigger; |
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209 |
} |
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object->SetTriggers(object, waiting_triggers); |
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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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return Resolve(group->g.random.groups[index], object); |
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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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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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} |