mirror of
https://github.com/electronicarts/CnC_Remastered_Collection
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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.
132 lines
7.6 KiB
C++
132 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: /CounterStrike/FLY.CPP 1 3/03/97 10:24a 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 : FLY.CPP *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : April 24, 1994 *
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* *
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* Last Update : June 5, 1995 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* FlyClass::Fly_Speed -- Sets the flying object to the speed specified. *
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* FlyClass::Physics -- Performs vector physics (movement). *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "function.h"
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/***********************************************************************************************
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* FlyClass::Physics -- Performs vector physics (movement). *
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* *
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* This routine performs movement (vector) physics. It takes the *
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* specified location and moves it according to the facing and speed *
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* of the vector. It returns the status of the move. *
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* *
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* INPUT: coord -- Reference to the coordinate that the vector will *
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* be applied to. *
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* *
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* OUTPUT: Returns with the status of the vector physics. This could *
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* range from no effect, to exiting the edge of the world. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 04/24/1994 JLB : Created. *
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* 06/05/1995 JLB : Simplified to just do movement. *
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*=============================================================================================*/
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ImpactType FlyClass::Physics(COORDINATE & coord, DirType facing)
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{
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if (SpeedAdd != MPH_IMMOBILE) {
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int actual = (int)SpeedAdd + SpeedAccum;
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div_t result = div(actual, PIXEL_LEPTON_W);
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SpeedAccum = result.rem;
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actual -= result.rem;
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COORDINATE old = coord;
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/*
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** If movement occurred that is at least one
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** pixel, then check update the coordinate and
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** check for edge of world collision.
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*/
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if (result.quot) {
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COORDINATE newcoord; // New working coordinate.
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newcoord = Coord_Move(coord, facing, actual);
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/*
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** If no movement occurred, then presume it hasn't moved at all
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** and return immediately with this indication.
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*/
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if (newcoord == coord) {
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return(IMPACT_NONE);
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}
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/*
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** Remember the new position.
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*/
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coord = newcoord;
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/*
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** If the new coordinate is off the edge of the world, then report
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** this.
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*/
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if (newcoord & HIGH_COORD_MASK /*|| !Map.In_Radar(Coord_Cell(newcoord))*/) {
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// if (!Map.In_Radar(Coord_Cell(newcoord))) {
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coord = old;
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return(IMPACT_EDGE);
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}
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return(IMPACT_NORMAL);
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}
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}
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return(IMPACT_NONE);
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}
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/***********************************************************************************************
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* FlyClass::Fly_Speed -- Sets the flying object to the speed specified. *
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* *
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* This sets the speed of the projectile. It basically functions like a throttle value *
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* where 0 equals stop and 255 equals maximum speed (whatever that is for the particular *
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* object). *
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* *
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* INPUT: speed -- Speed setting from 0 to 255. *
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* *
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* maximum -- The maximum speed of the object. *
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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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* 07/26/1994 JLB : Created. *
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* 07/26/1994 JLB : Added maximum speed as guiding value. *
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*=============================================================================================*/
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void FlyClass::Fly_Speed(int speed, MPHType maximum)
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{
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SpeedAdd = (MPHType)( maximum * fixed(speed, 256));
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// SpeedAdd = (MPHType)Fixed_To_Cardinal((int)maximum, speed);
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}
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