102 lines
1.9 KiB
C++
102 lines
1.9 KiB
C++
/*=========================================================================
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pseesaw.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) 2001 Climax Development Ltd
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===========================================================================*/
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#ifndef __PLATFORM_PSEESAW_H__
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#include "platform\pseesaw.h"
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#endif
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#ifndef __GAME_GAME_H__
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#include "game\game.h"
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#endif
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void CNpcSeesawPlatform::postInit()
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{
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CNpcPlatform::postInit();
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m_angularVelocity = 0;
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m_currentAngle = 0;
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}
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void CNpcSeesawPlatform::processMovement( int _frames )
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{
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s32 forceActing = 0;
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if ( m_contact )
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{
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// find if user is to left or right of platform centre
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CPlayer *player = GameScene.getPlayer();
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DVECTOR playerPos = player->getPos();
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s32 distX = playerPos.vx - this->Pos.vx;
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if ( distX > 0 )
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{
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forceActing = 64 * _frames;
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m_angularVelocity += forceActing;
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}
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else if ( distX < 0 )
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{
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forceActing = -64 * _frames;
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m_angularVelocity += forceActing;
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}
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}
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if ( !forceActing && m_angularVelocity )
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{
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// reduce velocity until 0
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s32 m_angularResistance = -( 64 * _frames * m_angularVelocity ) / abs( m_angularVelocity );
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if ( m_angularResistance < -m_angularVelocity )
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{
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m_angularResistance = -m_angularVelocity;
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}
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else if ( m_angularResistance > m_angularVelocity )
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{
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m_angularResistance = m_angularVelocity;
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}
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m_angularVelocity += m_angularResistance;
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}
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if ( m_angularVelocity > ( 20 << 8 ) )
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{
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m_angularVelocity = 20 << 8;
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}
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else if ( m_angularVelocity < -( 20 << 8 ) )
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{
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m_angularVelocity = -( 20 << 8 );
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}
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s32 newAngle = m_currentAngle + m_angularVelocity;
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if ( newAngle > ( 512 << 8 ) )
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{
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newAngle = 512 << 8;
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m_angularVelocity = 0;
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}
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else if ( newAngle < -( 512 << 8 ) )
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{
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newAngle = -( 512 << 8 );
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m_angularVelocity = 0;
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}
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m_currentAngle = newAngle;
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setCollisionAngle( newAngle >> 8 );
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} |