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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*
*/
package com.sun.j3d.loaders.lw3d;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.util.Vector;
import javax.media.j3d.Behavior;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Light;
import javax.media.j3d.PointLight;
import javax.media.j3d.SpotLight;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Matrix4d;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
import com.sun.j3d.loaders.ParsingErrorException;
/**
* This class creates a light object from the data in a Scene file. It
* instantiates an LwsMotion object to create any associated
* animations.
*/
class LwsLight extends TextfileParser implements LwsPrimitive {
// data from the file
String fileName;
String objName;
LwsMotion motion;
int parent;
TransformGroup objectTransform;
Vector objectBehavior;
Color3f color;
int type;
Point3f attenuation = new Point3f(1.0f, 0.0f, 0.0f);
float spotConeAngle = (float)(Math.PI);
// Meta object, used for holding light and
LwLightObject lwLight;
// light parameters
LwsEnvelopeLightIntensity intensityEnvelope = null;
Light light = null;
final static int DIRECTIONAL = 0, POINT = 1, SPOT = 2;
/**
* Constructor: parses stream and creates data structures for all
* light parameters currently handled by the loader
*/
LwsLight(StreamTokenizer st, int totalFrames, float totalTime,
int debugVals) throws ParsingErrorException {
debugPrinter.setValidOutput(debugVals);
debugOutput(TRACE, "LwsLight()");
color = new Color3f(1f, 1f, 1f);
lwLight = new LwLightObject(null, 0.0f, null);
parent = -1;
debugOutputLn(LINE_TRACE, "about to get LightName");
getAndCheckString(st, "LightName");
debugOutputLn(LINE_TRACE, "about to get LightName value");
objName = getName(st);
debugOutputLn(LINE_TRACE, "got LightName");
skip(st, "ShowLight", 2);
debugOutputLn(LINE_TRACE, "got ShowLight");
getAndCheckString(st, "LightMotion");
debugOutputLn(LINE_TRACE, "got LightMotion");
motion = new LwsMotion(st, totalFrames, totalTime);
debugOutputLn(LINE_TRACE, "got motions");
// TODO: buggy way to stop processing the light. Should actually
// process required/optional fields in order and stop when there's
// no more. However, spec says "ShadowCasing" but the files say
// "ShadowType".
while (!isCurrentToken(st, "ShowCamera") &&
!isCurrentToken(st, "AddLight")) {
// TODO:
// Things that we're not yet processing (and should):
// - EdgeAngle: for spotlights, this is the angle which
// contains the linear falloff toward the edge of the
// ConeAngle. This doesn't directly map to J3d's
// "concentration" value, so it's left out for now.
debugOutputLn(LINE_TRACE, "currentToken = " + st.sval);
if (isCurrentToken(st, "ParentObject")) {
parent = (int)getNumber(st);
}
else if (isCurrentToken(st, "LightColor")) {
color.x = (float)getNumber(st)/255f;
color.y = (float)getNumber(st)/255f;
color.z = (float)getNumber(st)/255f;
lwLight.setColor(color);
}
else if (isCurrentToken(st, "LgtIntensity")) {
// TODO: must be able to handle envelopes here
String className = getClass().getName();
int classIndex = className.lastIndexOf('.');
String packageName;
if (classIndex < 0)
packageName = "";
else
packageName = className.substring(0, classIndex) + ".";
EnvelopeHandler env =
new EnvelopeHandler(st, totalFrames, totalTime,
packageName + "LwsEnvelopeLightIntensity");
if (env.hasValue) {
float intensity = (float)env.theValue;
color.x *= intensity;
color.y *= intensity;
color.z *= intensity;
lwLight.setIntensity(intensity);
}
else {
intensityEnvelope =
(LwsEnvelopeLightIntensity)env.theEnvelope;
}
}
else if (isCurrentToken(st, "LightType")) {
type = (int)getNumber(st);
}
else if (isCurrentToken(st, "Falloff")) {
float falloff = (float)getNumber(st);
attenuation.y = 1.0f/(1.0f - falloff) - 1.0f;
}
else if (isCurrentToken(st, "ConeAngle")) {
spotConeAngle = (float)getNumber(st) * (float)(Math.PI / 180.0);
}
try {
st.nextToken();
}
catch (IOException e) {
throw new ParsingErrorException(e.getMessage());
}
}
st.pushBack(); // push "ShowCamera" or "AddLight" back on stack
}
int getParent() {
return parent;
}
/**
* Create Java3D objects from the data we got from the file
*/
void createJava3dObject(int loadBehaviors) {
Matrix4d mat = new Matrix4d();
mat.setIdentity();
// Set the node's transform matrix according to the first frame
// of the object's motion
LwsFrame firstFrame = motion.getFirstFrame();
firstFrame.setMatrix(mat);
debugOutputLn(VALUES, "Light transform = " + mat);
Transform3D t1 = new Transform3D();
t1.set(mat);
objectTransform = new TransformGroup(t1);
objectTransform.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Vector3f defaultDir = new Vector3f(0f, 0f, -1f);
Point3f defaultPos = new Point3f(0f, 0f, 0f);
switch (type) {
case DIRECTIONAL:
light = new DirectionalLight(color, defaultDir);
break;
case POINT:
light = new PointLight(color, defaultPos, attenuation);
break;
case SPOT:
// Note: spotConeAngle in lw3d is half that of Java3d...
light = new SpotLight(color, defaultPos, attenuation, defaultDir,
2 * spotConeAngle, 0.0f);
break;
default:
// Shouldn't get here
break;
}
light.setCapability(Light.ALLOW_COLOR_WRITE);
if (light != null) {
lwLight.setLight(light);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0), 100000.0);
light.setInfluencingBounds(bounds);
objectTransform.addChild(light);
// load behaviors if we have to
objectBehavior = new Vector();
if (loadBehaviors != 0) {
Behavior b;
b = null;
motion.createJava3dBehaviors(objectTransform);
b = motion.getBehaviors();
if (b != null)
objectBehavior.addElement(b);
if (intensityEnvelope != null) {
b = null;
intensityEnvelope.createJava3dBehaviors(lwLight);
b = intensityEnvelope.getBehaviors();
if (b != null)
objectBehavior.addElement(b);
}
}
}
}
@Override
public TransformGroup getObjectNode()
{
return objectTransform;
}
Light getLight() {
return light;
}
@Override
public Vector getObjectBehaviors()
{
debugOutputLn(TRACE, "getObjectBehaviors()");
return objectBehavior;
}
void printVals()
{
debugOutputLn(VALUES, " LIGHT vals: ");
debugOutputLn(VALUES, " objName = " + objName);
motion.printVals();
}
}