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(svn r21175) -Add: Forced construction of missing industries.

This commit is contained in:
alberth 2010-11-13 15:21:55 +00:00
parent 0c775e5750
commit 2c4564c7dd
1 changed files with 49 additions and 21 deletions
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70
src/industry_cmd.cpp
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@ -1867,11 +1867,15 @@ static uint32 GetScaledIndustryGenerationProbability(IndustryType it, bool *forc
/**
* Compute the probability for constructing a new industry during game play.
* @param it Industry type to compute.
* @param [out] min_number Minimal number of industries that should exist at the map.
* @return Relative probability for the industry to appear.
*/
static uint16 GetIndustryGamePlayProbability(IndustryType it)
static uint16 GetIndustryGamePlayProbability(IndustryType it, byte *min_number)
{
if (_settings_game.difficulty.number_industries == 0) return 0;
if (_settings_game.difficulty.number_industries == 0) {
*min_number = 0;
return 0;
}
const IndustrySpec *ind_spc = GetIndustrySpec(it);
byte chance = ind_spc->appear_ingame[_settings_game.game_creation.landscape];
@ -1879,8 +1883,10 @@ static uint16 GetIndustryGamePlayProbability(IndustryType it)
((ind_spc->behaviour & INDUSTRYBEH_BEFORE_1950) && _cur_year > 1950) ||
((ind_spc->behaviour & INDUSTRYBEH_AFTER_1960) && _cur_year < 1960) ||
!CheckIfCallBackAllowsAvailability(it, IACT_RANDOMCREATION)) {
*min_number = 0;
return 0;
}
*min_number = (ind_spc->behaviour & INDUSTRYBEH_CANCLOSE_LASTINSTANCE) ? 1 : 0;
return chance;
}
@ -1971,6 +1977,7 @@ static uint GetCurrentTotalNumberOfIndustries()
void IndustryTypeBuildData::Reset()
{
this->probability = 0;
this->min_number = 0;
this->target_count = 0;
this->max_wait = 1;
this->wait_count = 0;
@ -2093,14 +2100,16 @@ void Industry::RecomputeProductionMultipliers()
/**
* Set the #probability field for the industry type \a it for a running game.
* Set the #probability and #min_number fields for the industry type \a it for a running game.
* @param it Industry type.
* @return The field has changed value.
* @return At least one of the fields has changed value.
*/
bool IndustryTypeBuildData::GetIndustryTypeData(IndustryType it)
{
uint32 probability = GetIndustryGamePlayProbability(it);
bool changed = probability != this->probability;
byte min_number;
uint32 probability = GetIndustryGamePlayProbability(it, &min_number);
bool changed = min_number != this->min_number || probability != this->probability;
this->min_number = min_number;
this->probability = probability;
return changed;
}
@ -2118,12 +2127,19 @@ void IndustryBuildData::SetupTargetCount()
changed |= num_planned != total_amount;
if (!changed) return; // All industries are still the same, no need to re-randomize.
/* Initialize the target counts. */
uint force_build = 0; // Number of industries that should always be available.
uint32 total_prob = 0; // Sum of probabilities.
for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
this->builddata[it].target_count = 0;
total_prob += this->builddata[it].probability;
IndustryTypeBuildData *ibd = this->builddata + it;
force_build += ibd->min_number;
ibd->target_count = ibd->min_number;
total_prob += ibd->probability;
}
/* Subtract forced industries from the number of industries available for construction. */
total_amount = (total_amount <= force_build) ? 0 : total_amount - force_build;
/* Assign number of industries that should be aimed for, by using the probability as a weight. */
while (total_amount > 0) {
uint32 r = RandomRange(total_prob);
@ -2149,34 +2165,46 @@ void IndustryBuildData::TryBuildNewIndustry()
int missing = 0; // Number of industries that need to be build.
uint count = 0; // Number of industry types eligible for build.
uint32 total_prob = 0; // Sum of probabilities.
IndustryType forced_build = NUM_INDUSTRYTYPES; // Industry type that should be forcibly build.
for (IndustryType it = 0; it < NUM_INDUSTRYTYPES; it++) {
int difference = this->builddata[it].target_count - Industry::GetIndustryTypeCount(it);
missing += difference;
if (this->builddata[it].wait_count > 0) continue; // This type may not be built now.
if (difference > 0) {
if (Industry::GetIndustryTypeCount(it) == 0 && this->builddata[it].min_number > 0) {
/* An industry that should exist at least once, is not available. Force it, trying the most needed one first. */
if (forced_build == NUM_INDUSTRYTYPES ||
difference > this->builddata[forced_build].target_count - Industry::GetIndustryTypeCount(forced_build)) {
forced_build = it;
}
}
total_prob += difference;
count++;
}
}
if (EconomyIsInRecession() || missing <= 0 || total_prob == 0) count = 0; // Skip creation of an industry.
if (EconomyIsInRecession() || (forced_build == NUM_INDUSTRYTYPES && (missing <= 0 || total_prob == 0))) count = 0; // Skip creation of an industry.
if (count >= 1) {
/* Pick a weighted random industry to build.
/* If not forced, pick a weighted random industry to build.
* For the case that count == 1, there is no need to draw a random number. */
IndustryType it;
/* Select an industry type to build (weighted random). */
uint32 r = 0; // Initialized to silence the compiler.
if (count > 1) r = RandomRange(total_prob);
for (it = 0; it < NUM_INDUSTRYTYPES; it++) {
if (this->builddata[it].wait_count > 0) continue; // Type may not be built now.
int difference = this->builddata[it].target_count - Industry::GetIndustryTypeCount(it);
if (difference <= 0) continue; // Too many of this kind.
if (count == 1) break;
if (r < (uint)difference) break;
r -= difference;
if (forced_build != NUM_INDUSTRYTYPES) {
it = forced_build;
} else {
/* Non-forced, select an industry type to build (weighted random). */
uint32 r = 0; // Initialized to silence the compiler.
if (count > 1) r = RandomRange(total_prob);
for (it = 0; it < NUM_INDUSTRYTYPES; it++) {
if (this->builddata[it].wait_count > 0) continue; // Type may not be built now.
int difference = this->builddata[it].target_count - Industry::GetIndustryTypeCount(it);
if (difference <= 0) continue; // Too many of this kind.
if (count == 1) break;
if (r < (uint)difference) break;
r -= difference;
}
assert(it < NUM_INDUSTRYTYPES && this->builddata[it].target_count > Industry::GetIndustryTypeCount(it));
}
assert(it < NUM_INDUSTRYTYPES && this->builddata[it].target_count > Industry::GetIndustryTypeCount(it));
/* Try to create the industry. */
const Industry *ind = PlaceIndustry(it, IACT_RANDOMCREATION, false);