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/**
* Copyright © 2012 Canonical Ltd.
*
* Authors:
* Sam Spilsbury <sam.spilsbury@canonical.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
**/
#include "wall-offset.h"
namespace compiz
{
namespace expo
{
void
calculateWallOffset (const CompRect &output,
const CompPoint &offsetInScreenCoords,
const CompPoint &vpSize,
const CompSize &screenSize,
float &offsetInWorldX,
float &offsetInWorldY,
float &worldScaleFactorX,
float &worldScaleFactorY,
float animationProgress)
{
const float sx = screenSize.width () / static_cast <float> (output.width ());
const float sy = screenSize.height () / static_cast <float> (output.height ());
offsetInWorldX = 0.0;
offsetInWorldY = 0.0;
worldScaleFactorX = 1.0f;
worldScaleFactorY = 1.0f;
offsetInWorldX = ((vpSize.x () * sx) / ((float) output.width ()) * (offsetInScreenCoords.x ()) * animationProgress);
worldScaleFactorX = 1.0f - ((float) (offsetInScreenCoords.x ()) / (float) (output.width ())) * animationProgress;
offsetInWorldY = ((vpSize.y () * sy) / ((float) output.height ()) * (offsetInScreenCoords.y ()) * animationProgress);
worldScaleFactorY = 1.0f - ((float) (offsetInScreenCoords.y ()) / (float) output.height ()) * animationProgress;
}
}
}
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