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Applied parent transforms if any in the lookAt method of Spatial.

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updated javadoc

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10225 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
This commit is contained in:
rem..om 2013-01-28 21:01:19 +00:00
parent 0617e63637
commit 361e45d04e
1 changed files with 16 additions and 5 deletions
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15
engine/src/core/com/jme3/scene/Spatial.java
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@ -409,11 +409,16 @@ public abstract class Spatial implements Savable, Cloneable, Collidable, Cloneab
/** /**
* <code>lookAt</code> is a convenience method for auto-setting the local * <code>lookAt</code> is a convenience method for auto-setting the local
* rotation based on a position and an up vector. It computes the rotation * rotation based on a position in world space and an up vector. It computes the rotation
* to transform the z-axis to point onto 'position' and the y-axis to 'up'. * to transform the z-axis to point onto 'position' and the y-axis to 'up'.
* Unlike {@link Quaternion#lookAt(com.jme3.math.Vector3f, com.jme3.math.Vector3f) } * Unlike {@link Quaternion#lookAt(com.jme3.math.Vector3f, com.jme3.math.Vector3f) }
* this method takes a world position to look at and not a relative direction. * this method takes a world position to look at and not a relative direction.
* *
* Note : 28/01/2013 this method has been fixed as it was not taking into account the parent rotation.
* This was resulting in improper rotation when the spatial had rotated parent nodes.
* This method is intended to work in world space, so no matter what parent graph the
* spatial has, it will look at the given position in world space.
*
* @param position * @param position
* where to look at in terms of world coordinates * where to look at in terms of world coordinates
* @param upVector * @param upVector
@ -426,11 +431,17 @@ public abstract class Spatial implements Savable, Cloneable, Collidable, Cloneab
TempVars vars = TempVars.get(); TempVars vars = TempVars.get();
Vector3f compVecA = vars.vect4; Vector3f compVecA = vars.vect4;
vars.release();
compVecA.set(position).subtractLocal(worldTranslation); compVecA.set(position).subtractLocal(worldTranslation);
getLocalRotation().lookAt(compVecA, upVector); getLocalRotation().lookAt(compVecA, upVector);
if ( getParent() != null ) {
Quaternion rot=vars.quat1;
rot = rot.set(parent.getWorldRotation()).inverseLocal().multLocal(getLocalRotation());
rot.normalizeLocal();
setLocalRotation(rot);
}
vars.release();
setTransformRefresh(); setTransformRefresh();
} }