134 lines
2.1 KiB
C++
134 lines
2.1 KiB
C++
/*=========================================================================
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npcpath.cpp
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Author: CRB
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Created:
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Project: Spongebob
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Purpose:
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Copyright (c) 2000 Climax Development Ltd
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===========================================================================*/
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#ifndef __ENEMY_NPCPATH_H__
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#include "enemy\npcpath.h"
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#endif
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bool CNpcWaypoint::isPointNear( DVECTOR testPos, s32 *xDist, s32 *yDist )
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{
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s32 xDistSqr, yDistSqr;
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*xDist = testPos.vx - this->pos.vx;
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xDistSqr = (*xDist) * (*xDist);
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*yDist = testPos.vy - this->pos.vy;
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yDistSqr = (*yDist) * (*yDist);
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if ( xDistSqr + yDistSqr < 100 )
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{
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return( true );
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}
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else
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{
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return( false );
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}
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}
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void CNpcPath::initPath()
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{
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int loop;
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for ( loop = 0 ; loop < NPC_MAX_WAYPOINTS ; loop++ )
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{
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waypoint[loop].pos.vx = 0;
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waypoint[loop].pos.vy = 0;
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}
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pathType = SINGLE_USE_PATH;
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currentWaypoint = 0;
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waypointCount = 0;
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reversePath = false;
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}
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void CNpcPath::addWaypoint( DVECTOR newPos )
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{
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if ( waypointCount < NPC_MAX_WAYPOINTS )
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{
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waypoint[waypointCount].pos = newPos;
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waypointCount++;
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}
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}
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void CNpcPath::setPathType( NPC_PATH_TYPE newPathType )
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{
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pathType = newPathType;
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}
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bool CNpcPath::incPath()
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{
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if ( !reversePath )
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{
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if ( currentWaypoint < waypointCount - 1 )
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{
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currentWaypoint++;
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}
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else
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{
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switch( pathType )
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{
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case SINGLE_USE_PATH:
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// path is completed
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return( true );
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case REPEATING_PATH:
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// go back to start
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currentWaypoint = 0;
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break;
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case PONG_PATH:
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// reverse path
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reversePath = !reversePath;
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currentWaypoint--;
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break;
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}
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}
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}
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else
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{
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// must be pong path if reversed
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if ( currentWaypoint > 0 )
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{
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currentWaypoint--;
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}
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else
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{
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reversePath = !reversePath;
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currentWaypoint++;
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}
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}
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return( false );
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}
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s32 CNpcPath::think( DVECTOR currentPos, bool *pathComplete )
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{
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s32 xDist, yDist;
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*pathComplete = false;
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if ( waypoint[currentWaypoint].isPointNear( currentPos, &xDist, &yDist ) )
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{
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*pathComplete = incPath();
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}
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s32 headingToTarget = ratan2( -yDist, -xDist );
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return( headingToTarget );
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} |