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annotate libmlk-core/core/maths.c @ 299:648f5f949afb

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core: implement stackable states
author David Demelier <markand@malikania.fr>
date Sun, 11 Apr 2021 16:41:34 +0200
parents 196264679079
children d01e83210ca2
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1 /*
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2 * maths.c -- basic maths
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include "maths.h"
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20
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21 int
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22 maths_is_boxed(int x, int y, unsigned int w, unsigned int h, int px, int py)
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23 {
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24 return px > x &&
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25 py > y &&
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26 px < x + (int)w &&
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27 py < y + (int)h;
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28 }
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29
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30 float
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31 maths_scale(float in, float old_min, float old_max, float new_min, float new_max)
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32 {
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33 return (in / ((old_max - old_min) / (new_max - new_min))) + new_min;
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34 }