85 lines
1.8 KiB
C++
Executable File
85 lines
1.8 KiB
C++
Executable File
#include "tools.h"
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#include <math.h>
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namespace LtsScriptTimeline
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{
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//int Tools::m_timelineLength = 5*60; // minimum len
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//float Tools::m_zoomFactor = 1;
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//int Tools::m_scrollPos = 0;
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//int Tools::m_paintWidth = 1; // rescue from possible 0-div
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int Tools::getLength(int startTime, int duration)
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{
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return /*std::abs*/ (getPos(startTime + duration) - getPos(startTime));
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}
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int Tools::getDuration(int duration) // px => time
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{
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double max = Tools::m_timelineLength;
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max /= Tools::m_zoomFactor;
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int paintWidth = m_paintWidth; // => 350px
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double x = duration; // => 466
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x /= paintWidth; // => 466 / 350px = 1,33
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x *= max; // => 1,33 * 300 = 400
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return lrint(x);
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}
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int Tools::getTime(int pos, bool neutral) // px => time
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{
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double visibleMax = Tools::m_timelineLength;
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visibleMax /= Tools::m_zoomFactor;
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if (!neutral)
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visibleMax += Tools::m_scrollPos;
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int visibleMin = 0;
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if (!neutral)
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visibleMin = Tools::m_scrollPos;
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double diff = visibleMax - visibleMin; // => 500 - 200 = 300
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int paintWidth = m_paintWidth; // => 350px
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double x = pos; // => 466
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x /= paintWidth; // => 466 / 350px = 1,33
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x *= diff; // => 1,33 * 300 = 400
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x += visibleMin; // => 400 + 0
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return lrint(x);
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}
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int Tools::getPos(int time, bool neutral) // time => px
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{
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double visibleMax = Tools::m_timelineLength;
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visibleMax /= Tools::m_zoomFactor;
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if (!neutral)
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visibleMax += Tools::m_scrollPos;
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int visibleMin = 0;
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if (!neutral)
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visibleMin = Tools::m_scrollPos;
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double diff = visibleMax - visibleMin; // => 500 - 200 = 300
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int paintWidth = m_paintWidth; // => 350px
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double x = time; // => 400
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x -= visibleMin; // => 400 - 0 = 400
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x /= diff; // => 400 / 300 = 1,333
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x *= paintWidth; // => 1,333 * 350px = 466,666
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return lrint(x);
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}
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} // namespace LtsScriptTimeline
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