Files @ r17167:68f47a8db1b5
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Location: cpp/openttd-patchpack/source/src/ai/api/ai_event_types.cpp

rubidium
(svn r21916) -Fix [FS#4442]: the minimum speed needed for (realistic) acceleration to work properly can sometimes be more than the (temporary) maximum speed causing Clamp to "fail". Make sure that the minimum speed always overrules the maximum speed
/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file ai_event_types.cpp Implementation of all EventTypes. */

#include "../../stdafx.h"
#include "ai_event_types.hpp"
#include "ai_vehicle.hpp"
#include "../../command_type.h"
#include "../../strings_func.h"
#include "../../settings_type.h"
#include "../../engine_base.h"
#include "../../articulated_vehicles.h"
#include "table/strings.h"

char *AIEventEnginePreview::GetName()
{
	static const int len = 64;
	char *engine_name = MallocT<char>(len);

	::SetDParam(0, this->engine);
	::GetString(engine_name, STR_ENGINE_NAME, &engine_name[len - 1]);
	return engine_name;
}

CargoID AIEventEnginePreview::GetCargoType()
{
	CargoArray cap = ::GetCapacityOfArticulatedParts(this->engine);

	CargoID most_cargo = CT_INVALID;
	uint amount = 0;
	for (CargoID cid = 0; cid < NUM_CARGO; cid++) {
		if (cap[cid] > amount) {
			amount = cap[cid];
			most_cargo = cid;
		}
	}

	return most_cargo;
}

int32 AIEventEnginePreview::GetCapacity()
{
	const Engine *e = ::Engine::Get(this->engine);
	switch (e->type) {
		case VEH_ROAD:
		case VEH_TRAIN: {
			CargoArray capacities = GetCapacityOfArticulatedParts(this->engine);
			for (CargoID c = 0; c < NUM_CARGO; c++) {
				if (capacities[c] == 0) continue;
				return capacities[c];
			}
			return -1;
		}

		case VEH_SHIP:
		case VEH_AIRCRAFT:
			return e->GetDisplayDefaultCapacity();

		default: NOT_REACHED();
	}
}

int32 AIEventEnginePreview::GetMaxSpeed()
{
	const Engine *e = ::Engine::Get(this->engine);
	int32 max_speed = e->GetDisplayMaxSpeed(); // km-ish/h
	if (e->type == VEH_AIRCRAFT) max_speed /= _settings_game.vehicle.plane_speed;
	return max_speed;
}

Money AIEventEnginePreview::GetPrice()
{
	return ::Engine::Get(this->engine)->GetCost();
}

Money AIEventEnginePreview::GetRunningCost()
{
	return ::Engine::Get(this->engine)->GetRunningCost();
}

int32 AIEventEnginePreview::GetVehicleType()
{
	switch (::Engine::Get(this->engine)->type) {
		case VEH_ROAD:     return AIVehicle::VT_ROAD;
		case VEH_TRAIN:    return AIVehicle::VT_RAIL;
		case VEH_SHIP:     return AIVehicle::VT_WATER;
		case VEH_AIRCRAFT: return AIVehicle::VT_AIR;
		default: NOT_REACHED();
	}
}

bool AIEventEnginePreview::AcceptPreview()
{
	return AIObject::DoCommand(0, this->engine, 0, CMD_WANT_ENGINE_PREVIEW);
}

bool AIEventCompanyAskMerger::AcceptMerger()
{
	return AIObject::DoCommand(0, this->owner, 0, CMD_BUY_COMPANY);
}