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48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/*
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Copyright (C) 2006 StrmnNrmn
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "BuildOptions.h"
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#include "Base/Types.h"
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#include "Graphics/ColourValue.h"
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#include "Math/Math.h" // VFPU Math
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#include "SysPSP/UI/ColourPulser.h"
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CColourPulser::CColourPulser( c32 dim_colour, c32 bright_colour, u32 cycle_period )
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: mTimeCounter( 0 )
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, mCyclePeriod( cycle_period )
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, mDimColour( dim_colour )
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, mBrightColour( bright_colour )
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, mCurrentColour( mDimColour )
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{}
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CColourPulser::~CColourPulser() {}
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void CColourPulser::Update( u32 elapsed_ms )
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{
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mTimeCounter = (mTimeCounter + elapsed_ms) % mCyclePeriod;
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f32 cycle_fraction( f32(mTimeCounter) / f32(mCyclePeriod) );
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f32 sin_val( cosf( cycle_fraction * 2.0f * PI ) ); // In range -1..+1
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f32 factor( ( sin_val + 1.0f ) / 2.0f ); // In range 0..1
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mCurrentColour = mDimColour.Interpolate( mBrightColour, factor );
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}
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