98 lines
4.2 KiB
C++
98 lines
4.2 KiB
C++
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/* GRAPHITE2 LICENSING
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Copyright 2010, SIL International
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All rights reserved.
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of License, or
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(at your option) any later version.
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This program 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 GNU
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Lesser General Public License for more details.
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You should also have received a copy of the GNU Lesser General Public
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License along with this library in the file named "LICENSE".
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If not, write to the Free Software Foundation, 51 Franklin Street,
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Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
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internet at http://www.fsf.org/licenses/lgpl.html.
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Alternatively, the contents of this file may be used under the terms of the
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Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
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License, as published by the Free Software Foundation, either version 2
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of the License or (at your option) any later version.
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*/
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#include "inc/Position.h"
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#include <cmath>
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using namespace graphite2;
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bool Rect::hitTest(Rect &other)
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{
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if (bl.x > other.tr.x) return false;
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if (tr.x < other.bl.x) return false;
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if (bl.y > other.tr.y) return false;
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if (tr.y < other.bl.y) return false;
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return true;
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}
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Position Rect::overlap(Position &offset, Rect &other, Position &othero)
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{
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float ax = (bl.x + offset.x) - (other.tr.x + othero.x);
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float ay = (bl.y + offset.y) - (other.tr.y + othero.y);
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float bx = (other.bl.x + othero.x) - (tr.x + offset.x);
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float by = (other.bl.y + othero.y) - (tr.y + offset.y);
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return Position((ax > bx ? ax : bx), (ay > by ? ay : by));
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}
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float boundmin(float move, float lim1, float lim2, float &error)
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{
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// error is always positive for easy comparison
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if (move < lim1 && move < lim2)
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{ error = 0.; return move; }
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else if (lim1 < lim2)
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{ error = std::fabs(move - lim1); return lim1; }
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else
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{ error = std::fabs(move - lim2); return lim2; }
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}
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#if 0
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Position Rect::constrainedAvoid(Position &offset, Rect &box, Rect &sdbox, Position &other, Rect &obox, Rect &osdbox)
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{
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// a = max, i = min, s = sum, d = diff
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float eax, eay, eix, eiy, eas, eis, ead, eid;
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float beste = INF;
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Position res;
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// calculate the movements in each direction and the error (amount of remaining overlap)
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// first param is movement, second and third are movement over the constraining box
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float ax = boundmin(obox.tr.x + other.x - box.bl.x - offset.x + 1, tr.x - offset.x, INF, &eax);
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float ay = boundmin(obox.tr.y + other.y - box.bl.y - offset.y + 1, tr.y - offset.y, INF, &eay);
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float ix = boundmin(obox.bl.x + other.x - box.tr.x - offset.x + 1, bl.x - offset.x, INF, &eix);
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float iy = boundmin(obox.bl.y + other.y - box.tr.y - offset.y + 1, bl.y - offset.y, INF, &eiy);
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float as = boundmin(ISQRT2 * (osdbox.tr.x + other.x + other.y - sdbox.bl.x - offset.x - offset.y) + 1, tr.x - offset.x, tr.y - offset.y, &eas);
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float is = boundmin(ISQRT2 * (osdbox.bl.x + other.x + other.y - sdbox.tr.x - offset.x - offset.y) + 1, bl.x - offset.x, bl.y - offset.y, &eis);
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float ad = boundmin(ISQRT2 * (osdbox.tr.y + other.x - other.y - sdbox.bl.y - offset.x + offset.y) + 1, tr.y - offset.y, tr.x - offset.x, &ead);
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float id = boundmin(ISQRT2 * (osdbox.bl.y + other.x - other.y - sdbox.tr.y - offset.x + offset.y) + 1, bl.y - offset.y, bl.x - offset.x, &eid);
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if (eax < beste)
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{ res = Position(ax, 0); beste = eax; }
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if (eay < beste)
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{ res = Position(0, ay); beste = eay; }
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if (eix < beste)
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{ res = Position(ix, 0); beste = eix; }
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if (eiy < beste)
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{ res = Position(0, iy); beste = eiy; }
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if (SQRT2 * (eas) < beste)
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{ res = Position(as, ad); beste = SQRT2 * (eas); }
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if (SQRT2 * (eis) < beste)
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{ res = Position(is, is); beste = SQRT2 * (eis); }
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if (SQRT2 * (ead) < beste)
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{ res = Position(ad, ad); beste = SQRT2 * (ead); }
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if (SQRT2 * (eid) < beste)
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{ res = Position(id, id); beste = SQRT2 * (eid); }
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return res;
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}
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#endif
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