91 lines
1.7 KiB
C++
91 lines
1.7 KiB
C++
/*
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** flashable.h
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**
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** This file is part of mkxp.
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**
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** Copyright (C) 2013 Jonas Kulla <Nyocurio@gmail.com>
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**
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** mkxp is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 2 of the License, or
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** (at your option) any later version.
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**
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** mkxp 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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**
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** You should have received a copy of the GNU General Public License
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** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FLASHABLE_H
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#define FLASHABLE_H
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#include "etc.h"
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#include "etc-internal.h"
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class Flashable
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{
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public:
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Flashable()
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: flashColor(0, 0, 0, 0),
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flashing(false),
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emptyFlashFlag(false)
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{}
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virtual ~Flashable() {}
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void flash(const Vec4 *color, int duration)
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{
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if (duration < 1)
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return;
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flashing = true;
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this->duration = duration;
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counter = 0;
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if (!color)
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{
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emptyFlashFlag = true;
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return;
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}
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flashColor = *color;
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flashAlpha = flashColor.w;
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}
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virtual void update()
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{
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if (!flashing)
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return;
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if (++counter > duration)
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{
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/* Flash finished. Cleanup */
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flashColor = Vec4(0, 0, 0, 0);
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flashing = false;
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emptyFlashFlag = false;
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return;
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}
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/* No need to update flash color on empty flash */
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if (emptyFlashFlag)
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return;
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float prog = (float) counter / duration;
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flashColor.w = flashAlpha * (1 - prog);
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}
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protected:
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Vec4 flashColor;
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bool flashing;
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bool emptyFlashFlag;
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private:
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float flashAlpha;
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int duration;
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int counter;
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};
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#endif // FLASHABLE_H
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