40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* A library for avr microcontrollers to control WS2812 leds
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*
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* Copyright (C) 2016 Markus Schmidl
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the 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 along with this program;
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* if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* clamps x to interval [0,1]
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*/
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#define clamp_to_0_1(x) (x>0?(x<1?x:1):0)
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/**
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* clamps x to interval [0,255]
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*/
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#define clamp_to_0_255(x) (x>0?(x<255?x:255):0)
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/**
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* function
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*
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* 360 - |x|
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*/
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#define _360_min_fabs(x) (360.0 - fabs(x))
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/**
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* function
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*
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* x
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* - -----
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* |x|
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*/
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#define _change_pos_neg(x) (-1.0 * x / fabs(x))
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