Glenn Maynard
88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
#include "global.h" // testing updates
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/*
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-----------------------------------------------------------------------------
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Class: ActorScroller
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Desc: See header.
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Copyright (c) 2001-2002 by the person(s) listed below. All rights reserved.
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Chris Danford
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-----------------------------------------------------------------------------
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*/
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#include "ActorScroller.h"
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#include "ActorCollision.h"
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#include <math.h>
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#include "RageUtil.h"
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ActorScroller::ActorScroller()
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{
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m_fSecsIntoScroll = 0;
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}
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void ActorScroller::Load( vector<Actor*> vActors, float fBaseX, float fBaseY, float fVelX, float fVelY, float fSpacingX, float fSpacingY )
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{
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m_vActors = vActors;
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m_vBase.x = fBaseX;
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m_vBase.y = fBaseY;
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m_vVelocity.x = fVelX;
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m_vVelocity.y = fVelY;
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m_vSpacing.x = fSpacingX;
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m_vSpacing.y = fSpacingY;
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// adjust base
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float t = 10000; // inf
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if( m_vSpacing.x != 0 )
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t = min( t, m_vBase.x / fabsf(m_vSpacing.x) );
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if( m_vSpacing.y != 0 )
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t = min( t, m_vBase.y / fabsf(m_vSpacing.y) );
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m_vBase.x -= t * fabsf(m_vSpacing.x);
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m_vBase.y -= t * fabsf(m_vSpacing.y);
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if( m_vVelocity.x < 0 )
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m_vBase.x += SCREEN_WIDTH;
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if( m_vVelocity.y < 0 )
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m_vBase.y += SCREEN_HEIGHT;
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// push off screen
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if( m_vVelocity.x!=0 ) m_vBase.x += m_vSpacing.x/2;
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if( m_vVelocity.y!=0 ) m_vBase.y += m_vSpacing.y/2;
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}
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float ActorScroller::GetTotalSecsToScroll()
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{
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float fMaxSecToScroll = 0;
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if( m_vVelocity.x != 0 )
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{
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float fSecToScroll = fabsf(m_vSpacing.x*(m_vActors.size()+1) + SCREEN_WIDTH) / fabsf(m_vVelocity.x);
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fMaxSecToScroll = max( fMaxSecToScroll, fSecToScroll );
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}
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if( m_vVelocity.y != 0 )
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{
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float fSecToScroll = fabsf(m_vSpacing.y*(m_vActors.size()+1) + SCREEN_HEIGHT) / fabsf(m_vVelocity.y);
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fMaxSecToScroll = max( fMaxSecToScroll, fSecToScroll );
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}
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return fMaxSecToScroll;
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}
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void ActorScroller::Update( float fDeltaTime )
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{
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m_fSecsIntoScroll += fDeltaTime;
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for( unsigned i=0; i<m_vActors.size(); i++ )
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{
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float fX = m_vBase.x + m_vSpacing.x * i + m_vVelocity.x * m_fSecsIntoScroll;
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float fY = m_vBase.y + m_vSpacing.y * i + m_vVelocity.y * m_fSecsIntoScroll;
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fX = roundf( fX );
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fY = roundf( fY );
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m_vActors[i]->SetXY( fX, fY );
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}
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}
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void ActorScroller::DrawPrimitives()
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{
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for( unsigned i=0; i<m_vActors.size(); i++ )
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if( !IsOffScreen(m_vActors[i]) )
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m_vActors[i]->Draw();
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}
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