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author | Guillaume Melquiond <guillaume.melquiond@gmail.com> | 2007-08-13 21:09:12 +0000 |
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committer | Guillaume Melquiond <guillaume.melquiond@gmail.com> | 2007-08-13 21:09:12 +0000 |
commit | 68f069fea3182c6d5720df03f1d63de38f14c31d (patch) | |
tree | 129b4705b644cf1144b3bff3c18fca9e1b83a3b8 /src/utils | |
parent | d3e938c478570be44c497607262fe8ca7145b171 (diff) | |
download | mana-client-68f069fea3182c6d5720df03f1d63de38f14c31d.tar.gz mana-client-68f069fea3182c6d5720df03f1d63de38f14c31d.tar.bz2 mana-client-68f069fea3182c6d5720df03f1d63de38f14c31d.tar.xz mana-client-68f069fea3182c6d5720df03f1d63de38f14c31d.zip |
Fixed svn properties.
Diffstat (limited to 'src/utils')
-rw-r--r-- | src/utils/fastsqrt.h | 48 | ||||
-rw-r--r-- | src/utils/minmax.h | 94 |
2 files changed, 71 insertions, 71 deletions
diff --git a/src/utils/fastsqrt.h b/src/utils/fastsqrt.h index 8da1d354..78768149 100644 --- a/src/utils/fastsqrt.h +++ b/src/utils/fastsqrt.h @@ -1,24 +1,24 @@ -/* A very fast function to calculate the approximate inverse square root of a
- * floating point value and a helper function that uses it for getting the
- * normal squareroot. For an explanation of the inverse squareroot function
- * read:
- * http://www.math.purdue.edu/~clomont/Math/Papers/2003/InvSqrt.pdf
- *
- * Unfortunately the original creator of this function seems to be unknown.
- */
-
-float fastInvSqrt(float x)
-{
- union { int i; float x; } tmp;
- float xhalf = 0.5f * x;
- tmp.x = x;
- tmp.i = 0x5f375a86 - (tmp.i >> 1);
- x = tmp.x;
- x = x * (1.5f - xhalf * x * x);
- return x;
-}
-
-float fastSqrt(float x)
-{
- return 1.0f / fastInvSqrt(x);
-}
+/* A very fast function to calculate the approximate inverse square root of a + * floating point value and a helper function that uses it for getting the + * normal squareroot. For an explanation of the inverse squareroot function + * read: + * http://www.math.purdue.edu/~clomont/Math/Papers/2003/InvSqrt.pdf + * + * Unfortunately the original creator of this function seems to be unknown. + */ + +float fastInvSqrt(float x) +{ + union { int i; float x; } tmp; + float xhalf = 0.5f * x; + tmp.x = x; + tmp.i = 0x5f375a86 - (tmp.i >> 1); + x = tmp.x; + x = x * (1.5f - xhalf * x * x); + return x; +} + +float fastSqrt(float x) +{ + return 1.0f / fastInvSqrt(x); +} diff --git a/src/utils/minmax.h b/src/utils/minmax.h index 1add2b7e..27eb2565 100644 --- a/src/utils/minmax.h +++ b/src/utils/minmax.h @@ -1,47 +1,47 @@ -/*
- * The Mana World
- * Copyright 2006 The Mana World Development Team
- *
- * This file is part of The Mana World.
- *
- * The Mana World 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
- * any later version.
- *
- * The Mana World 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 The Mana World; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-/**
- * Returns a random numeric value that is larger than or equal min and smaller
- * than max
- */
-
-template <typename T> struct MinMax
-{
- void set(T min, T max)
- {
- minVal=min; maxVal=max;
- }
-
- void set(T val)
- {
- set(val, val);
- }
-
- T value()
- {
- return (T)(minVal + (maxVal - minVal) * (rand() / ((double) RAND_MAX + 1)));
- }
-
- T minVal;
- T maxVal;
-};
+/* + * The Mana World + * Copyright 2006 The Mana World Development Team + * + * This file is part of The Mana World. + * + * The Mana World 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 + * any later version. + * + * The Mana World 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 The Mana World; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/** + * Returns a random numeric value that is larger than or equal min and smaller + * than max + */ + +template <typename T> struct MinMax +{ + void set(T min, T max) + { + minVal=min; maxVal=max; + } + + void set(T val) + { + set(val, val); + } + + T value() + { + return (T)(minVal + (maxVal - minVal) * (rand() / ((double) RAND_MAX + 1))); + } + + T minVal; + T maxVal; +}; |