diff options
Diffstat (limited to 'core/math/math_2d.cpp')
| -rw-r--r-- | core/math/math_2d.cpp | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/core/math/math_2d.cpp b/core/math/math_2d.cpp index 3aaa539fb..0a3963f88 100644 --- a/core/math/math_2d.cpp +++ b/core/math/math_2d.cpp @@ -5,7 +5,7 @@ /* GODOT ENGINE */ /* http://www.godotengine.org */ /*************************************************************************/ -/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ @@ -230,6 +230,23 @@ Vector2 Vector2::cubic_interpolate(const Vector2& p_b,const Vector2& p_pre_a, co + Vector2 p0=p_pre_a; + Vector2 p1=*this; + Vector2 p2=p_b; + Vector2 p3=p_post_b; + + float t = p_t; + float t2 = t * t; + float t3 = t2 * t; + + Vector2 out; + out = 0.5f * ( ( p1 * 2.0f) + + ( -p0 + p2 ) * t + + ( 2.0f * p0 - 5.0f * p1 + 4 * p2 - p3 ) * t2 + + ( -p0 + 3.0f * p1 - 3.0f * p2 + p3 ) * t3 ); + return out; + +/* float mu = p_t; float mu2 = mu*mu; @@ -239,7 +256,7 @@ Vector2 Vector2::cubic_interpolate(const Vector2& p_b,const Vector2& p_pre_a, co Vector2 a3 = *this; return ( a0*mu*mu2 + a1*mu2 + a2*mu + a3 ); - +*/ /* float t = p_t; real_t t2 = t*t; |