SBSPSS/source/hazard/hpendulm.cpp

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/*=========================================================================
hpendulm.cpp
Author: CRB
Created:
Project: Spongebob
Purpose:
Copyright (c) 2001 Climax Development Ltd
===========================================================================*/
#ifndef __HAZARD_HPENDULM_H__
#include "hazard\hpendulm.h"
#endif
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#ifndef __UTILS_HEADER__
#include "utils\utils.h"
#endif
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void CNpcPendulumHazard::init()
{
CNpcHazard::init();
m_extendDir = EXTEND_LEFT;
m_extension = 0;
m_heading = 1024;
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m_length = 200;
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}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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void CNpcPendulumHazard::setWaypoints( sThingHazard *ThisHazard )
{
int pointNum;
u16 *PntList=(u16*)MakePtr(ThisHazard,sizeof(sThingHazard));
u16 newXPos, newYPos;
newXPos = (u16) *PntList;
PntList++;
newYPos = (u16) *PntList;
PntList++;
DVECTOR startPos;
startPos.vx = newXPos << 4;
startPos.vy = newYPos << 4;
if ( ThisHazard->PointCount > 1 )
{
newXPos = (u16) *PntList;
PntList++;
newYPos = (u16) *PntList;
PntList++;
DVECTOR pivotPos;
pivotPos.vx = newXPos << 4;
pivotPos.vy = newYPos << 4;
s32 xDist = startPos.vx - pivotPos.vx;
s32 yDist = startPos.vy - pivotPos.vy;
m_maxExtension = 1024 - ratan2( abs( yDist ), abs( xDist ) );
m_length = isqrt2( ( xDist * xDist ) + ( yDist * yDist ) );
Pos = pivotPos;
}
else
{
Pos = startPos;
}
m_base = Pos;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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void CNpcPendulumHazard::processMovement( int _frames )
{
if ( m_extendDir == EXTEND_LEFT )
{
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if ( m_extension > m_maxExtension )
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{
m_extendDir = EXTEND_RIGHT;
}
else
{
m_extension += _frames << 3;
}
}
else
{
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if ( m_extension < -m_maxExtension )
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{
m_extendDir = EXTEND_LEFT;
}
else
{
m_extension -= _frames << 3;
}
}
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Pos.vx = m_base.vx + ( ( m_length * rcos( m_heading + m_extension ) ) >> 12 );
Pos.vy = m_base.vy + ( ( m_length * rsin( m_heading + m_extension ) ) >> 12 );
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}