diff options
author | Chris Xiong <chirs241097@gmail.com> | 2015-10-26 22:52:36 +0800 |
---|---|---|
committer | Chris Xiong <chirs241097@gmail.com> | 2015-10-26 22:52:36 +0800 |
commit | 3bd383baf6a17e734329e1fc677c7e86283db772 (patch) | |
tree | 69a9148087577f797624ceb9c71323a2563d6bb4 /archive/hgehelp/hgevector.cpp | |
parent | 543e4f570be9b279ba558ca61cc02cda251af384 (diff) | |
download | bullet-lab-remix-3bd383baf6a17e734329e1fc677c7e86283db772.tar.xz |
Added support for relative line numbers.
Added instructions for, brk and cont. (They are still untested...)
Parser code cleanup. Removed garbage output to stderr.
Reorganize the repository structure.
Updated BLR2 code move it into archive.
Added BLR1 files.
Diffstat (limited to 'archive/hgehelp/hgevector.cpp')
-rw-r--r-- | archive/hgehelp/hgevector.cpp | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/archive/hgehelp/hgevector.cpp b/archive/hgehelp/hgevector.cpp new file mode 100644 index 0000000..921f7b7 --- /dev/null +++ b/archive/hgehelp/hgevector.cpp @@ -0,0 +1,69 @@ +/* +** Haaf's Game Engine 1.7 +** Copyright (C) 2003-2007, Relish Games +** hge.relishgames.com +** +** hgeVector helper class implementation +*/ + + +#include "hgevector.h" + +float InvSqrt(float x) +{ + union + { + int intPart; + float floatPart; + } convertor; + + convertor.floatPart = x; + convertor.intPart = 0x5f3759df - (convertor.intPart >> 1); + return convertor.floatPart*(1.5f - 0.4999f*x*convertor.floatPart*convertor.floatPart); +} + +/* +hgeVector *hgeVector::Normalize() +{ + float lenRcp; + + lenRcp=sqrtf(Dot(this)); + + if(lenRcp) + { + lenRcp=1.0f/lenRcp; + + x*=lenRcp; + y*=lenRcp; + } + + return this; +} +*/ + +float hgeVector::Angle(const hgeVector *v) const +{ + if(v) + { + hgeVector s=*this, t=*v; + + s.Normalize(); t.Normalize(); + return acosf(s.Dot(&t)); + } + else return atan2f(y, x); +} + +hgeVector *hgeVector::Rotate(float a) +{ + hgeVector v; + + v.x=x*cosf(a) - y*sinf(a); + v.y=x*sinf(a) + y*cosf(a); + + x=v.x; y=v.y; + + return this; +} + + + |