SBSPSS/source/platform/plinear.cpp

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/*=========================================================================
plinear.cpp
Author: CRB
Created:
Project: Spongebob
Purpose:
Copyright (c) 2001 Climax Development Ltd
===========================================================================*/
#ifndef __PLATFORM_PLINEAR_H__
#include "platform\plinear.h"
#endif
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void CNpcLinearPlatform::postInit()
{
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CNpcPlatform::postInit();
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m_npcPath.setPathType( CNpcPath::PONG_PATH );
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void CNpcLinearPlatform::processMovement( int _frames )
{
s32 moveX = 0, moveY = 0;
s32 moveDist = 0;
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s32 xDist, yDist;
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bool pathComplete;
bool waypointChange;
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s16 headingToTarget = m_npcPath.think( Pos, &pathComplete, &waypointChange, &xDist, &yDist );
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if ( !pathComplete )
{
s16 decDir, incDir;
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s16 maxTurnRate = m_dataPtr->turnSpeed;
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decDir = m_heading - headingToTarget;
if ( decDir < 0 )
{
decDir += ONE;
}
incDir = headingToTarget - m_heading;
if ( incDir < 0 )
{
incDir += ONE;
}
if ( decDir < incDir )
{
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moveDist = -decDir;
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}
else
{
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moveDist = incDir;
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}
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if ( moveDist < -maxTurnRate )
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{
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moveDist = -maxTurnRate;
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}
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else if ( moveDist > maxTurnRate )
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{
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moveDist = maxTurnRate;
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}
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m_heading += moveDist;
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m_heading &= 4095;
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s32 preShiftX = _frames * m_speed * rcos( m_heading );
s32 preShiftY = _frames * m_speed * rsin( m_heading );
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moveX = preShiftX >> 12;
if ( !moveX && preShiftX )
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{
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moveX = preShiftX / abs( preShiftX );
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}
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if ( xDist > 0 )
{
if ( moveX > xDist )
{
moveX = xDist;
}
}
else if ( xDist < 0 )
{
if ( moveX < xDist )
{
moveX = xDist;
}
}
else
{
moveX = 0;
}
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moveY = preShiftY >> 12;
if ( !moveY && preShiftY )
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{
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moveY = preShiftY / abs( preShiftY );
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}
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if ( yDist > 0 )
{
if ( moveY > yDist )
{
moveY = yDist;
}
}
else if ( yDist < 0 )
{
if ( moveY < yDist )
{
moveY = yDist;
}
}
else
{
moveY = 0;
}
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//processGroundCollisionReverse( moveX, moveY );
}
Pos.vx += moveX;
Pos.vy += moveY;
}