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/*
* Copyright 1996-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package javax.media.j3d;
import javax.vecmath.Vector3f;
/**
* An infinite directional light source object.
*/
class DirectionalLightRetained extends LightRetained
{
static final int DIRECTION_CHANGED = LAST_DEFINED_BIT << 1;
// The direction in which this light source is pointing.
Vector3f direction = new Vector3f(0.0f, 0.0f, -1.0f);
// The transformed direction
Vector3f xformDirection = new Vector3f(0.0f, 0.0f, -1.0f);
DirectionalLightRetained() {
this.nodeType = NodeRetained.DIRECTIONALLIGHT;
lightType = 2;
localBounds = new BoundingBox((Bounds)null);
}
/**
* Initializes this light's direction from the vector provided.
* @param direction the new direction
*/
void initDirection(Vector3f direction) {
this.direction.set(direction);
if (staticTransform != null) {
staticTransform.transform.transform(
this.direction, this.direction);
}
}
/**
* Sets this light's direction from the vector provided.
* and sends a message
* @param direction the new direction
*/
void setDirection(Vector3f direction) {
initDirection(direction);
J3dMessage createMessage = new J3dMessage();
createMessage.threads = targetThreads;
createMessage.type = J3dMessage.LIGHT_CHANGED;
createMessage.universe = universe;
createMessage.args[0] = this;
createMessage.args[1]= new Integer(DIRECTION_CHANGED);
if (inSharedGroup)
createMessage.args[2] = new Integer(numMirrorLights);
else
createMessage.args[2] = new Integer(1);
createMessage.args[3] = mirrorLights.clone();
createMessage.args[4] = new Vector3f(direction);
VirtualUniverse.mc.processMessage(createMessage);
}
/**
* Initializes this light's direction from the three values provided.
* @param x the new x direction
* @param y the new y direction
* @param z the new z direction
*/
void initDirection(float x, float y, float z) {
this.direction.x = x;
this.direction.y = y;
this.direction.z = z;
if (staticTransform != null) {
staticTransform.transform.transform(
this.direction, this.direction);
}
}
/**
* Sets this light's direction from the three values provided.
* @param x the new x direction
* @param y the new y direction
* @param z the new z direction
*/
void setDirection(float x, float y, float z) {
setDirection(new Vector3f(x, y, z));
}
/**
* Retrieves this light's direction and places it in the
* vector provided.
* @param direction the variable to receive the direction vector
*/
void getDirection(Vector3f direction) {
direction.set(this.direction);
if (staticTransform != null) {
Transform3D invTransform = staticTransform.getInvTransform();
invTransform.transform(direction, direction);
}
}
@Override
void setLive(SetLiveState s) {
super.setLive(s);
J3dMessage createMessage = super.initMessage(8);
Object[] objs = (Object[])createMessage.args[4];
objs[7] = new Vector3f(direction);
VirtualUniverse.mc.processMessage(createMessage);
}
/**
* This update function, and its native counterpart,
* updates a directional light. This includes its
* color and its transformed direction.
*/
@Override
// Note : if you add any more fields here , you need to update
// updateLight() in RenderingEnvironmentStructure
void updateMirrorObject(Object[] objs) {
int i;
int component = ((Integer)objs[1]).intValue();
int numLgts = ((Integer)objs[2]).intValue();
LightRetained[] mLgts = (LightRetained[]) objs[3];
DirectionalLightRetained ml;
if ((component & DIRECTION_CHANGED) != 0) {
for (i = 0; i < numLgts; i++) {
if (mLgts[i].nodeType == NodeRetained.DIRECTIONALLIGHT) {
ml = (DirectionalLightRetained) mLgts[i];
ml.direction = (Vector3f)objs[4];
ml.getLastLocalToVworld().transform(ml.direction,
ml.xformDirection);
ml.xformDirection.normalize();
}
}
}
if ((component & INIT_MIRROR) != 0) {
for (i = 0; i < numLgts; i++) {
if (mLgts[i].nodeType == NodeRetained.DIRECTIONALLIGHT) {
ml = (DirectionalLightRetained) mLgts[i];
ml.direction = (Vector3f)((Object[])objs[4])[7];
ml.getLastLocalToVworld().transform(ml.direction,
ml.xformDirection);
ml.xformDirection.normalize();
}
}
}
// call the parent's mirror object update routine
super.updateMirrorObject(objs);
}
@Override
void update(Context ctx, int lightSlot, double scale) {
Pipeline.getPipeline().updateDirectionalLight(ctx,
lightSlot, color.x, color.y, color.z,
xformDirection.x, xformDirection.y,
xformDirection.z);
}
// Clones only the retained side, internal use only
@Override
protected Object clone() {
DirectionalLightRetained dr =
(DirectionalLightRetained)super.clone();
dr.direction = new Vector3f(direction);
dr.xformDirection = new Vector3f(0.0f, 0.0f, -1.0f);
return dr;
}
// Called on the mirror object
@Override
void updateTransformChange() {
super.updateTransformChange();
getLastLocalToVworld().transform(direction, xformDirection);
xformDirection.normalize();
}
@Override
void mergeTransform(TransformGroupRetained xform) {
super.mergeTransform(xform);
xform.transform.transform(direction, direction);
}
}