mirror of https://github.com/OpenRCT2/OpenRCT2.git
256 lines
7.4 KiB
C
256 lines
7.4 KiB
C
/*****************************************************************************
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* Copyright (c) 2014 Ted John
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* This file is part of OpenRCT2.
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************/
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#include "addresses.h"
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#include "ride.h"
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#include "ride_data.h"
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#include "ride_ratings.h"
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/**
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* rct2: 0x0065C4D4
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*
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* Compute excitement, intensity, etc. for a crooked house ride.
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*/
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void crooked_house_excitement(rct_ride *ride)
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{
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// Set lifecycle bits
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ride->lifecycle_flags |= RIDE_LIFECYCLE_TESTED;
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ride->lifecycle_flags |= RIDE_LIFECYCLE_NO_RAW_STATS;
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ride->var_198 = 5;
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sub_655FD6(ride);
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ride_rating excitement = RIDE_RATING(2,15);
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ride_rating intensity = RIDE_RATING(0,62);
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ride_rating nausea = RIDE_RATING(0,34);
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// NB this should get marked out by the compiler, if it's smart.
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excitement = apply_intensity_penalty(excitement, intensity);
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rating_tuple tup = per_ride_rating_adjustments(ride, excitement, intensity, nausea);
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excitement = tup.excitement;
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intensity = tup.intensity;
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nausea = tup.nausea;
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ride->excitement = excitement;
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ride->intensity = intensity;
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ride->nausea = nausea;
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ride->upkeep_cost = compute_upkeep(ride);
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// Upkeep flag? or a dirtiness flag
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ride->var_14D |= 2;
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// clear all bits except lowest 5
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ride->var_114 &= 0x1f;
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// set 6th,7th,8th bits
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ride->var_114 |= 0xE0;
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}
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/**
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* rct2: sub_65E621
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*
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* I think this function computes ride upkeep? Though it is weird that the
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*
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* inputs
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* - edi: ride ptr
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*/
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uint16 compute_upkeep(rct_ride *ride)
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{
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// data stored at 0x0057E3A8, incrementing 18 bytes at a time
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uint16 upkeep = initialUpkeepCosts[ride->type];
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uint16 trackCost = costPerTrackPiece[ride->type];
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uint8 dl = ride->var_115;
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dl = dl >> 6;
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dl = dl & 3;
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upkeep += trackCost * dl;
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uint32 cuml = ride->var_0E4;
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cuml += ride->var_0E8;
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cuml += ride->var_0EC;
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cuml += ride->var_0F0;
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cuml = cuml >> 0x10;
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// The data originally here was 20's and 0's. The 20's all represented
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// rides that had tracks. The 0's were fixed rides like crooked house or
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// bumper cars.
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// Data source is 0x0097E3AC
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if (hasRunningTrack[ride->type]) {
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cuml = cuml * 20;
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}
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cuml = cuml >> 0x0A;
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upkeep += (uint16)cuml;
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if (ride->lifecycle_flags & RIDE_LIFECYCLE_ON_RIDE_PHOTO) {
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// The original code read from a table starting at 0x0097E3AE and
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// incrementing by 0x12 bytes between values. However, all of these
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// values were 40. I have replaced the table lookup with the constant
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// 40 in this case.
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upkeep += 40;
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}
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// Originally this data was at 0x0097E3B0 and incrementing in 18 byte
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// offsets. The value here for every ride is 80, except for the reverser,
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// which is 10
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uint16 eax;
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if (ride->type == RIDE_TYPE_REVERSER_ROLLER_COASTER) {
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eax = 10;
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} else {
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eax = 80;
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}
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// not sure what this value is; it's only written to in one place, where
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// it's incremented.
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sint16 dx = RCT2_GLOBAL(0x0138B5CC, sint16);
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upkeep += eax * dx;
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dx = RCT2_GLOBAL(0x0138B5CA, sint16);
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// Originally there was a lookup into a table at 0x0097E3B0 and
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// incrementing in 18 byte offsets. The value here for every ride was 20,
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// so it's been replaced here by the constant.
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upkeep += 20 * dx;
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// these seem to be adhoc adjustments to a ride's upkeep/cost, times
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// various variables set on the ride itself.
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// https://gist.github.com/kevinburke/e19b803cd2769d96c540
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upkeep += rideUnknownData1[ride->type] * ride->var_0C8;
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// either set to 3 or 0, extra boosts for some rides including mini golf
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if (rideUnknownData2[ride->type]) {
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upkeep += 3 * ride->var_0C9;
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}
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// slight upkeep boosts for some rides - 5 for mini railroad, 10 for log
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// flume/rapids, 10 for roller coaster, 28 for giga coaster
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upkeep += rideUnknownData3[ride->type] * ride->var_0C7;
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if (ride->mode == RIDE_MODE_REVERSE_INCLINED_SHUTTLE) {
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upkeep += 30;
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} else if (ride->mode == RIDE_MODE_POWERED_LAUNCH) {
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upkeep += 160;
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} else if (ride->mode == RIDE_MODE_LIM_POWERED_LAUNCH) {
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upkeep += 320;
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} else if (ride->mode == RIDE_MODE_POWERED_LAUNCH2 ||
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ride->mode == RIDE_MODE_POWERED_LAUNCH_BLOCK_SECTIONED) {
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upkeep += 220;
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}
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// multiply by 5/8
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upkeep = upkeep * 10;
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upkeep = upkeep >> 4;
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return upkeep;
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}
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/**
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* rct2: 0x0065E7FB
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*
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* inputs
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* - bx: excitement
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* - cx: intensity
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* - bp: nausea
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* - edi: ride ptr
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*/
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rating_tuple per_ride_rating_adjustments(rct_ride *ride, ride_rating excitement,
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ride_rating intensity, ride_rating nausea)
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{
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// NB: The table here is allocated dynamically. Reading the exe will tell
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// you nothing
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rct_ride_type *rideType = gRideTypeList[ride->subtype];
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// example value here: 12 (?)
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excitement = excitement + ((excitement * rideType->excitement_multipler) >> 7);
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intensity = intensity + ((intensity * rideType->intensity_multipler) >> 7);
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nausea = nausea + ((nausea * rideType->nausea_multipler) >> 7);
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// As far as I can tell, this flag detects whether the ride is a roller
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// coaster, or a log flume or rapids. Everything else it's not set.
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// more detail: https://gist.github.com/kevinburke/d951e74e678b235eef3e
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uint16 ridetype_var = RCT2_GLOBAL(0x0097D4F2 + ride->type * 8, uint16);
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if (ridetype_var & 0x80) {
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uint16 ax = ride->var_1F4;
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if (rideType->var_008 & 0x800) {
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// 65e86e
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ax = ax - 96;
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if (ax >= 0) {
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ax = ax >> 3;
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excitement = excitement - ax;
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ax = ax >> 1;
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nausea = nausea - ax;
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}
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} else {
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ax = ax >> 3;
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excitement = excitement + ax;
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ax = ax >> 1;
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nausea += ax;
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}
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}
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rating_tuple tup = { excitement, intensity, nausea };
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return tup;
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}
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/**
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* rct2: 0x0065E7A3
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*
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* inputs from x86
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* - bx: excitement
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* - cx: intensity
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* - bp: nausea
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*
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* returns: the excitement level, with intensity penalties applied
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*/
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ride_rating apply_intensity_penalty(ride_rating excitement, ride_rating intensity)
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{
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// intensity penalty
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if (intensity >= 1000) {
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excitement = excitement - (excitement >> 2);
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}
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if (intensity >= 1100) {
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excitement = excitement - (excitement >> 2);
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}
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if (intensity >= 1200) {
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excitement = excitement - (excitement >> 2);
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}
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if (intensity >= 1320) {
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excitement = excitement - (excitement >> 2);
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}
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if (intensity >= 1450) {
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excitement = excitement - (excitement >> 2);
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}
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return excitement;
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}
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/**
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* rct2: 0x00655FD6
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*
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* Take ride property 1CD, make some modifications, store the modified value in
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* property 198.
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*/
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void sub_655FD6(rct_ride *ride)
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{
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uint8 al = ride->var_1CD;
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// No idea what this address is; maybe like compensation of some kind? The
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// maximum possible value?
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// List of ride names/values is here:
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// https://gist.github.com/kevinburke/5eebcda14d94e6ee99c0
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al -= RCT2_ADDRESS(0x0097D7C9, uint8)[4 * ride->type];
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al = al << 1;
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ride->var_198 += al;
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}
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