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(svn r3032) -NewGRF, Feature: Add support for changing base prices.

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This commit is contained in:
peter1138 2005-10-12 07:27:56 +00:00
parent d678a12445
commit c78e87d4da
3 changed files with 62 additions and 0 deletions
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32
economy.c
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@ -768,6 +768,33 @@ static const int32 _price_base[NUM_PRICES] = {
1000000, // build_industry
};
static byte price_base_multiplier[NUM_PRICES];
/**
* Reset changes to the price base multipliers.
*/
void ResetPriceBaseMultipliers(void)
{
int i;
// 8 means no multiplier.
for (i = 0; i < NUM_PRICES; i++)
price_base_multiplier[i] = 8;
}
/**
* Change a price base by the given factor.
* The price base is altered by factors of two, with an offset of 8.
* NewBaseCost = OldBaseCost * 2^(n-8)
* @param price Index of price base to change.
* @param factor Amount to change by.
*/
void SetPriceBaseMultiplier(int price, byte factor)
{
if (price < NUM_PRICES)
price_base_multiplier[price] = factor;
}
void StartupEconomy(void)
{
int i;
@ -784,6 +811,11 @@ void StartupEconomy(void)
price = price * 9 >> 3;
}
}
if (price_base_multiplier[i] > 8) {
price <<= price_base_multiplier[i] - 8;
} else {
price >>= 8 - price_base_multiplier[i];
}
((int32*)&_price)[i] = price;
_price_frac[i] = 0;
}

3
economy.h
View File

@ -3,6 +3,9 @@
#ifndef ECONOMY_H
#define ECONOMY_H
void ResetPriceBaseMultipliers(void);
void SetPriceBaseMultiplier(int price, byte factor);
typedef struct {
// Maximum possible loan
int32 max_loan;

27
newgrf.c
View File

@ -16,6 +16,7 @@
#include "newgrf.h"
#include "variables.h"
#include "bridge.h"
#include "economy.h"
/* TTDPatch extended GRF format codec
* (c) Petr Baudis 2004 (GPL'd)
@ -51,6 +52,7 @@ typedef enum grfspec_feature {
GSF_CANAL,
GSF_BRIDGE,
GSF_TOWNHOUSE,
GSF_GLOBALVAR,
} grfspec_feature;
@ -1058,6 +1060,27 @@ static bool BridgeChangeInfo(uint brid, int numinfo, int prop, byte **bufp, int
return ret;
}
static bool GlobalVarChangeInfo(uint gvid, int numinfo, int prop, byte **bufp, int len)
{
byte *buf = *bufp;
int i;
bool ret = false;
switch (prop) {
case 0x08: { /* Cost base factor */
FOR_EACH_OBJECT {
byte factor = grf_load_byte(&buf);
SetPriceBaseMultiplier(gvid + i, factor);
}
} break;
default:
ret = true;
}
*bufp = buf;
return ret;
}
/* Action 0x00 */
static void VehicleChangeInfo(byte *buf, int len)
{
@ -1086,6 +1109,7 @@ static void VehicleChangeInfo(byte *buf, int len)
/* GSF_CANAL */ NULL,
/* GSF_BRIDGE */ BridgeChangeInfo,
/* GSF_TOWNHOUSE */NULL,
/* GSF_GLOBALVAR */GlobalVarChangeInfo,
};
uint8 feature;
@ -2354,6 +2378,9 @@ static void ResetNewGRFData(void)
// Unload sprite group data
UnloadWagonOverrides();
UnloadCustomEngineSprites();
// Reset price base data
ResetPriceBaseMultipliers();
}
static void InitNewGRFFile(const char* filename, int sprite_offset)