/**
* <code>rotateUpTo</code> is a utility function that alters the local rotation to point the Y
* axis in the direction given by newUp.
*
* @param newUp the up vector to use - assumed to be a unit vector.
*/
public void rotateUpTo(Vector3f newUp) {
TempVars vars = TempVars.get();
Vector3f compVecA = vars.vect1;
Quaternion q = vars.quat1;
// First figure out the current up vector.
Vector3f upY = compVecA.set(Vector3f.UNIT_Y);
Quaternion rot = localTransform.getRotation();
rot.multLocal(upY);
// get angle between vectors
float angle = upY.angleBetween(newUp);
// figure out rotation axis by taking cross product
Vector3f rotAxis = upY.crossLocal(newUp).normalizeLocal();
// Build a rotation quat and apply current local rotation.
q.fromAngleNormalAxis(angle, rotAxis);
q.mult(rot, rot);
vars.release();
setTransformRefresh();
}
/**
* (Internal use only) Forces a refresh of the given types of data.
*
* @param transforms Refresh world transform based on parents'
* @param bounds Refresh bounding volume data based on child nodes
* @param lights Refresh light list based on parents'
*/
public void forceRefresh(boolean transforms, boolean bounds, boolean lights) {
if (transforms) {
setTransformRefresh();
}
if (bounds) {
setBoundRefresh();
}
if (lights) {
setLightListRefresh();
}
}
/**
* @return A clone of this Spatial, the scene graph in its entirety is cloned and can be altered
* independently of the original scene graph.
* <p>Note that meshes of geometries are not cloned explicitly, they are shared if static, or
* specially cloned if animated.
* <p>All controls will be cloned using the Control.cloneForSpatial method on the clone.
* @see Mesh#cloneForAnim()
*/
public Spatial clone(boolean cloneMaterial) {
try {
Spatial clone = (Spatial) super.clone();
if (worldBound != null) {
clone.worldBound = worldBound.clone();
}
clone.worldLights = worldLights.clone();
clone.localLights = localLights.clone();
// Set the new owner of the light lists
clone.localLights.setOwner(clone);
clone.worldLights.setOwner(clone);
// No need to force cloned to update.
// This node already has the refresh flags
// set below so it will have to update anyway.
clone.worldTransform = worldTransform.clone();
clone.localTransform = localTransform.clone();
if (clone instanceof Node) {
Node node = (Node) this;
Node nodeClone = (Node) clone;
nodeClone.children = new SafeArrayList<Spatial>(Spatial.class);
for (Spatial child : node.children) {
Spatial childClone = child.clone(cloneMaterial);
childClone.parent = nodeClone;
nodeClone.children.add(childClone);
}
}
clone.parent = null;
clone.setBoundRefresh();
clone.setTransformRefresh();
clone.setLightListRefresh();
clone.controls = new SafeArrayList<Control>(Control.class);
for (int i = 0; i < controls.size(); i++) {
Control newControl = controls.get(i).cloneForSpatial(clone);
newControl.setSpatial(clone);
clone.controls.add(newControl);
}
if (userData != null) {
clone.userData = (HashMap<String, Savable>) userData.clone();
}
return clone;
} catch (CloneNotSupportedException ex) {
throw new AssertionError();
}
}
/**
* <code>lookAt</code> is a convenience method for auto-setting the local 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'. 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.
*
* <p>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 where to look at in terms of world coordinates
* @param upVector a vector indicating the (local) up direction. (typically {0, 1, 0} in jME.)
*/
public void lookAt(Vector3f position, Vector3f upVector) {
Vector3f worldTranslation = getWorldTranslation();
TempVars vars = TempVars.get();
Vector3f compVecA = vars.vect4;
compVecA.set(position).subtractLocal(worldTranslation);
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();
}
/**
* Rotates the spatial by the given rotation.
*
* @return The spatial on which this method is called, e.g <code>this</code>.
*/
public Spatial rotate(Quaternion rot) {
this.localTransform.getRotation().multLocal(rot);
setTransformRefresh();
return this;
}
/**
* Scales the spatial by the given scale vector.
*
* @return The spatial on which this method is called, e.g <code>this</code>.
*/
public Spatial scale(float x, float y, float z) {
this.localTransform.getScale().multLocal(x, y, z);
setTransformRefresh();
return this;
}
/**
* Translates the spatial by the given translation vector.
*
* @return The spatial on which this method is called, e.g <code>this</code>.
*/
public Spatial move(Vector3f offset) {
this.localTransform.getTranslation().addLocal(offset);
setTransformRefresh();
return this;
}
/**
* Translates the spatial by the given translation vector.
*
* @return The spatial on which this method is called, e.g <code>this</code>.
*/
public Spatial move(float x, float y, float z) {
this.localTransform.getTranslation().addLocal(x, y, z);
setTransformRefresh();
return this;
}
/** <code>setLocalTransform</code> sets the local transform of this spatial. */
public void setLocalTransform(Transform t) {
this.localTransform.set(t);
setTransformRefresh();
}
/** <code>setLocalTranslation</code> sets the local translation of this spatial. */
public void setLocalTranslation(float x, float y, float z) {
this.localTransform.setTranslation(x, y, z);
setTransformRefresh();
}
/**
* <code>setLocalTranslation</code> sets the local translation of this spatial.
*
* @param localTranslation the local translation of this spatial.
*/
public void setLocalTranslation(Vector3f localTranslation) {
this.localTransform.setTranslation(localTranslation);
setTransformRefresh();
}
/**
* <code>setLocalScale</code> sets the local scale of this node.
*
* @param localScale the new local scale.
*/
public void setLocalScale(Vector3f localScale) {
localTransform.setScale(localScale);
setTransformRefresh();
}
/** <code>setLocalScale</code> sets the local scale of this node. */
public void setLocalScale(float x, float y, float z) {
localTransform.setScale(x, y, z);
setTransformRefresh();
}
/**
* <code>setLocalScale</code> sets the local scale of this node.
*
* @param localScale the new local scale, applied to x, y and z
*/
public void setLocalScale(float localScale) {
localTransform.setScale(localScale);
setTransformRefresh();
}
/**
* <code>setLocalRotation</code> sets the local rotation of this node.
*
* @param quaternion the new local rotation.
*/
public void setLocalRotation(Quaternion quaternion) {
localTransform.setRotation(quaternion);
setTransformRefresh();
}
/**
* <code>setLocalRotation</code> sets the local rotation of this node by using a {@link Matrix3f}.
*
* @param rotation the new local rotation.
*/
public void setLocalRotation(Matrix3f rotation) {
localTransform.getRotation().fromRotationMatrix(rotation);
setTransformRefresh();
}
