52 lines
976 B
C++
52 lines
976 B
C++
#include "..\easy2d.h"
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ActionOpacityBy::ActionOpacityBy(float duration, float opacity) :
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Animation(duration)
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{
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m_nVariation = opacity;
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}
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ActionOpacityBy::~ActionOpacityBy()
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{
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}
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void ActionOpacityBy::_init()
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{
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Animation::_init();
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m_nBeginVal = m_pTargetSprite->getOpacity();
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}
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bool ActionOpacityBy::_exec(LARGE_INTEGER nNow)
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{
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if (m_bStop) return true;
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if (!m_bRunning) return false;
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while (Animation::_exec(nNow))
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{
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// 计算移动位置
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float scale = float(m_nDuration) / m_nTotalDuration;
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// 移动 Sprite
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m_pTargetSprite->setOpacity(m_nBeginVal + m_nVariation * scale);
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// 判断动作是否结束
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if (_isEnd())
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{
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return true;
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}
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}
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return false;
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}
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void ActionOpacityBy::_reset()
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{
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Animation::_reset();
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}
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ActionOpacityBy * ActionOpacityBy::copy() const
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{
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return new ActionOpacityBy(m_nMilliSeconds / 1000.0f, m_nVariation);
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}
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ActionOpacityBy * ActionOpacityBy::reverse() const
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{
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return new ActionOpacityBy(m_nTotalDuration / 1000.0f, -m_nVariation);
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} |