diff options
| author | Kevin Rushforth <[email protected]> | 2004-09-17 20:18:20 +0000 |
|---|---|---|
| committer | Kevin Rushforth <[email protected]> | 2004-09-17 20:18:20 +0000 |
| commit | 38ae2822545700c0615a84551d472fe847f19b70 (patch) | |
| tree | c4b502ee3f9a08f96d07c112717b1ea95a1d351e /src/javax | |
| parent | 30ccf3450a6b317dc4eda061df6b5647a1df9745 (diff) | |
Issue number: 73
Obtained from: herkules
Submitted by: kcr
Reviewed by: kcr
Fix for Issue 73 (Quat4f#interpolate: incorrect when q1*q2<0)
git-svn-id: https://svn.java.net/svn/vecmath~svn/trunk@17 dd45e54d-f42e-c781-df72-dca083a658b1
Diffstat (limited to 'src/javax')
| -rw-r--r-- | src/javax/vecmath/Quat4d.java | 10 | ||||
| -rw-r--r-- | src/javax/vecmath/Quat4f.java | 10 |
2 files changed, 12 insertions, 8 deletions
diff --git a/src/javax/vecmath/Quat4d.java b/src/javax/vecmath/Quat4d.java index c6232f6..835e8e7 100644 --- a/src/javax/vecmath/Quat4d.java +++ b/src/javax/vecmath/Quat4d.java @@ -601,11 +601,12 @@ public class Quat4d extends Tuple4d implements java.io.Serializable { dot = x*q1.x + y*q1.y + z*q1.z + w*q1.w; if ( dot < 0 ) { - // switch the quaterion values + // negate quaternion q1.x = -q1.x; q1.y = -q1.y; q1.z = -q1.z; q1.w = -q1.w; + dot = -dot; } - if ( (1.0 - Math.abs(dot) ) > EPS ) { + if ( (1.0 - dot) > EPS ) { om = Math.acos(dot); sinom = Math.sin(om); s1 = Math.sin((1.0-alpha)*om)/sinom; @@ -640,11 +641,12 @@ public class Quat4d extends Tuple4d implements java.io.Serializable { dot = q2.x*q1.x + q2.y*q1.y + q2.z*q1.z + q2.w*q1.w; if ( dot < 0 ) { - // switch the quaterion values + // negate quaternion q1.x = -q1.x; q1.y = -q1.y; q1.z = -q1.z; q1.w = -q1.w; + dot = -dot; } - if ( (1.0 - Math.abs(dot) ) > EPS ) { + if ( (1.0 - dot) > EPS ) { om = Math.acos(dot); sinom = Math.sin(om); s1 = Math.sin((1.0-alpha)*om)/sinom; diff --git a/src/javax/vecmath/Quat4f.java b/src/javax/vecmath/Quat4f.java index f4fecfa..ecbef4b 100644 --- a/src/javax/vecmath/Quat4f.java +++ b/src/javax/vecmath/Quat4f.java @@ -606,11 +606,12 @@ public class Quat4f extends Tuple4f implements java.io.Serializable { dot = x*q1.x + y*q1.y + z*q1.z + w*q1.w; if ( dot < 0 ) { - // switch the quaterion values + // negate quaternion q1.x = -q1.x; q1.y = -q1.y; q1.z = -q1.z; q1.w = -q1.w; + dot = -dot; } - if ( (1.0 - Math.abs(dot) ) > EPS ) { + if ( (1.0 - dot) > EPS ) { om = Math.acos(dot); sinom = Math.sin(om); s1 = Math.sin((1.0-alpha)*om)/sinom; @@ -648,11 +649,12 @@ public class Quat4f extends Tuple4f implements java.io.Serializable { dot = q2.x*q1.x + q2.y*q1.y + q2.z*q1.z + q2.w*q1.w; if ( dot < 0 ) { - // switch the quaterion values + // negate quaternion q1.x = -q1.x; q1.y = -q1.y; q1.z = -q1.z; q1.w = -q1.w; + dot = -dot; } - if ( (1.0 - Math.abs(dot) ) > EPS ) { + if ( (1.0 - dot) > EPS ) { om = Math.acos(dot); sinom = Math.sin(om); s1 = Math.sin((1.0-alpha)*om)/sinom; |