mirror of
https://github.com/electronicarts/CnC_Remastered_Collection
synced 2024-04-29 09:52:36 +12:00
03416d24e1
Initial commit of original Tiberian Dawn and Red Alert source code converted to build as DLLs, and compatible with the release version of Command & Conquer Remastered.
133 lines
7.6 KiB
C++
133 lines
7.6 KiB
C++
//
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// Copyright 2020 Electronic Arts Inc.
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//
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
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// software: you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
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// in the hope that it will be useful, but with permitted additional restrictions
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// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
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// distributed with this program. You should have received a copy of the
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// GNU General Public License along with permitted additional restrictions
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// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
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/* $Header: F:\projects\c&c\vcs\code\abstract.cpv 2.20 16 Oct 1995 16:49:04 JOE_BOSTIC $ */
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/***********************************************************************************************
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*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
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***********************************************************************************************
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* *
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* Project Name : Command & Conquer *
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* *
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* File Name : ABSTRACT.CPP *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : 01/26/95 *
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* *
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* Last Update : May 22, 1995 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* AbstractClass::Distance -- Determines distance to target. *
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* AbstractTypeClass::AbstractTypeClass -- Constructor for abstract type objects. *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "function.h"
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/***********************************************************************************************
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* AbstractClass::Distance -- Determines distance to target. *
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* *
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* This will determine the distance (direct line) to the target. The distance is in *
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* 'leptons'. This routine is typically used for weapon range checks. *
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* *
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* INPUT: target -- The target to determine range to. *
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* *
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* OUTPUT: Returns with the range to the specified target (in leptons). *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 08/17/1994 JLB : Created. *
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*=============================================================================================*/
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int AbstractClass::Distance(TARGET target) const
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{
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/*
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** Should subtract a fudge-factor distance for building targets.
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*/
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BuildingClass *obj = As_Building(target);
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int dist = Distance(As_Coord(target));
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/*
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** If the object is a building the adjust it by the average radius
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** of the object.
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*/
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if (obj && obj->IsActive) {
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dist -= ((obj->Class->Width() + obj->Class->Height()) * (0x100 / 4));
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if (dist < 0) dist = 0;
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}
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/*
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** Return the distance to the target
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*/
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return(dist);
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}
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/***********************************************************************************************
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* AbstractTypeClass::AbstractTypeClass -- Constructor for abstract type objects. *
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* *
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* This is the constructor for AbstractTypeClass objects. It initializes the INI name and *
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* the text name for this object type. *
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* *
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* INPUT: name -- Text number for the full name of the object. *
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* *
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* ini -- The ini name for this object type. *
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* *
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* OUTPUT: none *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 05/22/1995 JLB : Created. *
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*=============================================================================================*/
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AbstractTypeClass::AbstractTypeClass(int name, char const * ini)
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{
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Name = name;
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strncpy((char *)IniName, ini, sizeof(IniName));
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((char &)IniName[sizeof(IniName)-1]) = '\0';
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}
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RTTIType AbstractTypeClass::What_Am_I(void) const {return RTTI_ABSTRACTTYPE;};
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COORDINATE AbstractTypeClass::Coord_Fixup(COORDINATE coord) const {return coord;}
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int AbstractTypeClass::Full_Name(void) const {return Name;};
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unsigned short AbstractTypeClass::Get_Ownable(void) const {return 0xffff;};
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void AbstractClass::Delete_This(void)
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{
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/*
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** Apparently Watcom preserved the vtable through the virtual destructor chain, otherwise C&C would crash all the time.
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**
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** MSVC doesn't. It overwrites the vtable pointer with the vtable of the class currently being destructed - presumably to
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** prevent virtual functions of the classes already destructed from being called.
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**
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** So this is a hacky workaround to restore the original vtable pointer after the destructor chain has finished, for when the
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** C&C code wants to call a virtual function on an object it just 'deleted'.
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**
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** ST - 1/9/2019 6:02PM
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*/
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unsigned long *this_ptr = (unsigned long*) this;
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unsigned long vtable_ptr = *this_ptr;
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/*
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** delete this calls the operator delete, it doesn't actually deallocate the memory.
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*/
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delete this;
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*this_ptr = vtable_ptr;
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}
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