Implement ride upkeep payments

src/finance.c

@@ -23,6 +23,7 @@
 #include "sprite.h"
 #include "park.h"
 #include "peep.h"
+#include "ride.h"
 #include "window.h"
 
 // monthly cost
@@ -102,6 +103,35 @@ void finance_pay_interest()
 	finance_payment((sint32)tempcost, RCT_EXPENDITURE_TYPE_INTEREST);
 }
 
+/**
+ *
+ * rct2: 0x006AC885
+ */
+void finance_pay_ride_upkeep()
+{
+	rct_ride* ride;
+	for (int i = 0; i < 255; i++) {
+		ride = &(RCT2_ADDRESS(RCT2_ADDRESS_RIDE_LIST, rct_ride)[i]);
+		if (ride->type == RIDE_TYPE_NULL)
+			continue;
+
+		if (!(ride->var_1D0 & 0x1000)) {
+			ride->build_date = RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_MONTH_YEAR, uint16);
+			ride->var_196 = 25855; // durability?
+
+		}
+		if (ride->status != RIDE_STATUS_CLOSED && !(RCT2_GLOBAL(RCT2_ADDRESS_PARK_FLAGS, uint32) & 0x800)) {
+			sint16 upkeep = ride->upkeep_cost;
+			if (upkeep != -1) {
+				ride->var_158 -= upkeep;
+				ride->var_14D |= 2;
+				finance_payment(upkeep, RCT2_EXPENDITURE_TYPE_RIDE_UPKEEP);
+			}
+		}
+	}
+}
+
+
 /**
 *
 *  rct2: 0x0069DEFB

src/finance.h

@@ -28,6 +28,7 @@
 typedef int rct_expenditure_type;
 
 enum {
+	RCT2_EXPENDITURE_TYPE_RIDE_UPKEEP = 1,
 	RCT_EXPENDITURE_TYPE_WAGES = 10,
 	RCT_EXPENDITURE_TYPE_RESEARCH = 12,
 	RCT_EXPENDITURE_TYPE_INTEREST = 13
@@ -38,6 +39,7 @@ void finance_payment(int amount, rct_expenditure_type type);
 void finance_pay_wages();
 void finance_pay_research();
 void finance_pay_interest();
+void finance_pay_ride_upkeep();
 void finance_init();
 
 #endif

src/ride.h

@@ -74,7 +74,8 @@ typedef struct {
 	uint16 var_158;
 	uint8 pad_15A[0x26];
 	uint16 build_date;				
-	uint8 pad_182[0x14];
+	sint16 upkeep_cost;				// 0x182
+	uint8 pad_184[0x12];
 	uint16 var_196;
 	uint8 pad_198;
 	uint8 var_199;

src/scenario.c

@@ -893,8 +893,8 @@ void scenario_update()
 
 	//if ( (unsigned int)((2 * current_day) & 0xFFFF) >= 0xFFF8) {
 	if (next_month_tick % 0x8000 == 0) {
-		// biweekly checks
-		RCT2_CALLPROC_EBPSAFE(0x006AC885);
+		// fortnightly 
+		finance_pay_ride_upkeep();
 	}
 
 	RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_MONTH_TICKS, uint16) = next_month_tick;