105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
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#include "StdAfx.h"
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#include "ColorTransitionHelper.h"
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void CColorTransitionHelper::Clear(const float & c_rfRed,
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const float & c_rfGreen,
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const float & c_rfBlue,
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const float & c_rfAlpha)
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{
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m_fSrcRed = c_rfRed;
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m_fSrcGreen = c_rfGreen;
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m_fSrcBlue = c_rfBlue;
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m_fSrcAlpha = c_rfAlpha;
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m_fDstRed = c_rfRed;
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m_fDstGreen = c_rfGreen;
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m_fDstBlue = c_rfBlue;
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m_fDstAlpha = c_rfAlpha;
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m_dwCurColor = 0x00000000;
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m_dwStartTime = m_dwDuration = 0;
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}
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void CColorTransitionHelper::SetSrcColor(const float & c_rfRed,
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const float & c_rfGreen,
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const float & c_rfBlue,
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const float & c_rfAlpha)
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{
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m_fSrcRed = c_rfRed;
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m_fSrcGreen = c_rfGreen;
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m_fSrcBlue = c_rfBlue;
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m_fSrcAlpha = c_rfAlpha;
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}
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void CColorTransitionHelper::SetTransition(const float & c_rfRed,
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const float & c_rfGreen,
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const float & c_rfBlue,
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const float & c_rfAlpha,
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const DWORD & dwDuration)
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{
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m_fDstRed = c_rfRed;
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m_fDstGreen = c_rfGreen;
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m_fDstBlue = c_rfBlue;
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m_fDstAlpha = c_rfAlpha;
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m_dwDuration = dwDuration;
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}
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void CColorTransitionHelper::StartTransition()
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{
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m_bTransitionStarted = true;
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m_dwStartTime = GetCurrentTime();
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}
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bool CColorTransitionHelper::Update()
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{
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// if (!m_bTransitionStarted)
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// return false;
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DWORD dwCurTime = GetCurrentTime();
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DWORD dwElapsedTime = dwCurTime - m_dwStartTime;
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float fpercent = (float)(dwElapsedTime) / (float)(m_dwDuration);
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if (fpercent <= 0.0f)
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fpercent = 0.0f;
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if (fpercent >= 1.0f)
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fpercent = 1.0f;
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float fCurRed, fCurGreen, fCurBlue, fCurAlpha;
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fCurRed = m_fSrcRed + (m_fDstRed - m_fSrcRed) * fpercent;
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fCurGreen = m_fSrcGreen + (m_fDstGreen - m_fSrcGreen) * fpercent;
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fCurBlue = m_fSrcBlue + (m_fDstBlue - m_fSrcBlue) * fpercent;
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fCurAlpha = m_fSrcAlpha + (m_fDstAlpha - m_fSrcAlpha) * fpercent;
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// Tracef("%f, %f, %f, %f\n", fCurRed, fCurGreen, fCurBlue, fCurAlpha);
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m_dwCurColor = (((DWORD)(fCurAlpha * 255.0f)&0xff)<< 24) |
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(((DWORD)(fCurRed * 255.0f)&0xff) << 16) |
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(((DWORD)(fCurGreen * 255.0f)&0xff) << 8) |
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((DWORD)(fCurBlue * 255.0f)&0xff);
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if ( (1.0f == fpercent) && (fCurAlpha == m_fDstAlpha) && (fCurRed == m_fDstRed) && (fCurGreen == m_fDstGreen) && (fCurBlue == m_fDstBlue) )
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{
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m_bTransitionStarted = false;
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return false;
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}
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return true;
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}
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const D3DCOLOR & CColorTransitionHelper::GetCurColor()
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{
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return m_dwCurColor;
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}
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CColorTransitionHelper::CColorTransitionHelper():m_bTransitionStarted(false)
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{
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Clear(0.0f, 0.0f, 0.0f, 0.0f);
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}
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CColorTransitionHelper::~CColorTransitionHelper()
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{
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Clear(0.0f, 0.0f, 0.0f, 0.0f);
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}
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