SBSPSS/source/platform/pbwheel.cpp

/*=========================================================================

	pbwheel.cpp

	Author:		CRB
	Created:
	Project:	Spongebob
	Purpose:

	Copyright (c) 2001 Climax Development Ltd

===========================================================================*/

#ifndef __PLATFORM_PBWHEEL_H__
#include "platform\pbwheel.h"
#endif

#ifndef	__UTILS_HEADER__
#include	"utils\utils.h"
#endif


////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void CNpcBigWheelPlatform::processMovement( int _frames )
{
	m_rotation += m_data[m_type].speed * _frames;
	m_rotation &= 4095;

	Pos.vx = m_base.vx + ( ( m_extension * rcos( m_rotation ) ) >> 12 );
	Pos.vy = m_base.vy + ( ( m_extension * rsin( m_rotation ) ) >> 12 );
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void CNpcBigWheelPlatform::setWaypoints( sThingPlatform *ThisPlatform )
{
	int pointNum;

	u16	*PntList=(u16*)MakePtr(ThisPlatform,sizeof(sThingPlatform));

	u16 newXPos, newYPos;

	newXPos = (u16) *PntList;
	PntList++;
	newYPos = (u16) *PntList;
	PntList++;

	DVECTOR startPos;
	startPos.vx = newXPos << 4;
	startPos.vy = newYPos << 4;

	if ( ThisPlatform->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;

		init( pivotPos );

		m_rotation = ratan2( yDist, xDist );

		m_extension = isqrt2( ( xDist * xDist ) + ( yDist * yDist ) );

	}
	else
	{
		init( startPos );
	}
}