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Core/Misc: update g3dlite lib (#2904)

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* Core/Misc: update g3dlite lib

* update

Co-authored-by: Francesco Borzì <borzifrancesco@gmail.com>
This commit is contained in:
Viste
2020-07-30 13:35:45 +03:00
committed by GitHub
parent 91bbbf08eb
commit fcaf91b8b2
183 changed files with 13258 additions and 8022 deletions
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30
deps/g3dlite/source/Random.cpp vendored
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@@ -1,12 +1,12 @@
/**
@file Random.cpp
\file Random.cpp
@maintainer Morgan McGuire, http://graphics.cs.williams.edu
\maintainer Morgan McGuire, http://graphics.cs.williams.edu
@created 2009-01-02
@edited 2009-03-29
\created 2009-01-02
\edited 2012-03-29
Copyright 2000-2009, Morgan McGuire.
Copyright 2000-2012, Morgan McGuire.
All rights reserved.
*/
#include "G3D/Random.h"
@@ -18,15 +18,23 @@ Random& Random::common() {
return r;
}
Random::Random(void* x) : state(NULL), m_threadsafe(false) {
(void)x;
}
Random::Random(uint32 seed, bool threadsafe) : m_threadsafe(threadsafe) {
state = new uint32[N];
reset(seed, threadsafe);
}
void Random::reset(uint32 seed, bool threadsafe) {
m_threadsafe = threadsafe;
const uint32 X = 1812433253UL;
state = new uint32[N];
state[0] = seed;
for (index = 1; index < (int)N; ++index) {
state[index] = X * (state[index - 1] ^ (state[index - 1] >> 30)) + index;
@@ -115,6 +123,7 @@ void Random::generate() {
int Random::integer(int low, int high) {
debugAssert(high >= low);
int r = iFloor(low + (high - low + 1) * (double)bits() / 0xFFFFFFFFUL);
// There is a *very small* chance of generating
@@ -147,6 +156,15 @@ float Random::gaussian(float mean, float stdev) {
}
void Random::cosSphere(float& x, float& y, float& z) {
cosHemi(x, y, z);
if (bits() & 1) {
// Choose the axis direction uniformly at random
z = -z;
}
}
void Random::cosHemi(float& x, float& y, float& z) {
const float e1 = uniform();
const float e2 = uniform();