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util-math: Add commonly used mathematical functions

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Michael Fabian 'Xaymar' Dirks 2017-12-14 00:28:35 +01:00
parent 61f20a83ad
commit d78d3024cc
3 changed files with 56 additions and 0 deletions
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2
CMakeLists.txt
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@ -47,6 +47,7 @@ SET(obs-stream-effects_HEADERS
"${PROJECT_SOURCE_DIR}/source/gs-mipmapper.h"
"${PROJECT_BINARY_DIR}/source/version.h"
"${PROJECT_SOURCE_DIR}/source/strings.h"
"${PROJECT_SOURCE_DIR}/source/util-math.h"
)
SET(obs-stream-effects_SOURCES
"${PROJECT_SOURCE_DIR}/source/plugin.cpp"
@ -63,6 +64,7 @@ SET(obs-stream-effects_SOURCES
"${PROJECT_SOURCE_DIR}/source/gs-vertex.cpp"
"${PROJECT_SOURCE_DIR}/source/gs-vertexbuffer.cpp"
"${PROJECT_SOURCE_DIR}/source/gs-mipmapper.cpp"
"${PROJECT_SOURCE_DIR}/source/util-math.cpp"
)
SET(obs-stream-effects_LOCALE
"${PROJECT_SOURCE_DIR}/data/locale/en-US.ini"

21
source/util-math.cpp Normal file
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@ -0,0 +1,21 @@
/*
* Modern effects for a modern Streamer
* Copyright (C) 2017 Michael Fabian Dirks
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "util-math.h"

33
source/util-math.h Normal file
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@ -0,0 +1,33 @@
/*
* Modern effects for a modern Streamer
* Copyright (C) 2017 Michael Fabian Dirks
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#pragma once
#include <math.h>
#include <inttypes.h>
#define PI 3.1415926535897932384626433832795
#define PI2 6.283185307179586476925286766559
#define PI2_SQROOT 2.506628274631000502415765284811
inline double_t Gaussian1D(double_t x, double_t o) {
double_t c = (x / o);
double_t b = exp(-0.5 * c * c);
double_t a = (1.0 / (o * PI2_SQROOT));
return a * b;
}