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/*
* Copyright 1997-2008 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 java.util.ArrayList;
import javax.vecmath.Color3f;
/**
* The ExponentialFog leaf node defines distance parameters for
* exponential fog.
*/
class ExponentialFogRetained extends FogRetained {
// Fog density
private float density = 1.0f;
// Issue 144: density in Eye Coordinates (EC)
private float densityInEc;
// dirty bits for ExponentialFog
static final int DENSITY_CHANGED = FogRetained.LAST_DEFINED_BIT << 1;
ExponentialFogRetained() {
this.nodeType = NodeRetained.EXPONENTIALFOG;
}
/**
* initializes fog density
*/
void initDensity(float density){
this.density = density;
}
/**
* Sets fog density and send a message
*/
void setDensity(float density){
this.density = density;
J3dMessage createMessage = new J3dMessage();
createMessage.threads = targetThreads;
createMessage.type = J3dMessage.FOG_CHANGED;
createMessage.universe = universe;
createMessage.args[0] = this;
createMessage.args[1]= new Integer(DENSITY_CHANGED);
createMessage.args[2] = new Float(density);
VirtualUniverse.mc.processMessage(createMessage);
}
/**
* Gets fog density
*/
float getDensity(){
return this.density;
}
@Override
void setLive(SetLiveState s) {
super.setLive(s);
// Initialize the mirror object, this needs to be done, when
// renderBin is not accessing any of the fields
J3dMessage createMessage = new J3dMessage();
createMessage.threads = J3dThread.UPDATE_RENDERING_ENVIRONMENT;
createMessage.universe = universe;
createMessage.type = J3dMessage.FOG_CHANGED;
createMessage.args[0] = this;
// a snapshot of all attributes that needs to be initialized
// in the mirror object
createMessage.args[1]= new Integer(INIT_MIRROR);
ArrayList addScopeList = new ArrayList();
for (int i = 0; i < scopes.size(); i++) {
GroupRetained group = scopes.get(i);
tempKey.reset();
group.addAllNodesForScopedFog(mirrorFog, addScopeList, tempKey);
}
Object[] scopeInfo = new Object[2];
scopeInfo[0] = ((scopes.size() > 0) ? Boolean.TRUE:Boolean.FALSE);
scopeInfo[1] = addScopeList;
createMessage.args[2] = scopeInfo;
Color3f clr = new Color3f(color);
createMessage.args[3] = clr;
Object[] obj = new Object[5];
obj[0] = boundingLeaf;
obj[1] = (regionOfInfluence != null?regionOfInfluence.clone():null);
obj[2] = (inBackgroundGroup? Boolean.TRUE:Boolean.FALSE);
obj[3] = geometryBackground;
obj[4] = new Float(density);
createMessage.args[4] = obj;
VirtualUniverse.mc.processMessage(createMessage);
}
/**
* This method and its native counterpart update the native context
* fog values.
*/
@Override
void update(Context ctx, double scale) {
// Issue 144: recompute the density in EC, and send it to native code
validateDistancesInEc(scale);
Pipeline.getPipeline().updateExponentialFog(ctx, color.x, color.y, color.z, densityInEc);
}
// The update Object function.
// Note : if you add any more fields here , you need to update
// updateFog() in RenderingEnvironmentStructure
@Override
void updateMirrorObject(Object[] objs) {
int component = ((Integer)objs[1]).intValue();
if ((component & DENSITY_CHANGED) != 0)
((ExponentialFogRetained)mirrorFog).density = ((Float)objs[2]).floatValue();
if ((component & INIT_MIRROR) != 0) {
((ExponentialFogRetained)mirrorFog).density = ((Float)((Object[])objs[4])[4]).floatValue();
}
// Issue 144: store the local to vworld scale used to transform the density
((ExponentialFogRetained)mirrorFog).setLocalToVworldScale(getLastLocalToVworld().getDistanceScale());
super.updateMirrorObject(objs);
}
// Clone the retained side only, internal use only
@Override
protected Object clone() {
ExponentialFogRetained efr =
(ExponentialFogRetained)super.clone();
efr.initDensity(getDensity());
return efr;
}
// Issue 144: method to recompute the density in EC by multiplying the specified
// density by the inverse of the local to EC scale
/**
* Scale distances from local to eye coordinate.
*/
@Override
protected void validateDistancesInEc(double vworldToCoexistenceScale) {
// vworldToCoexistenceScale can be used here since
// CoexistenceToEc has a unit scale
double localToEcScale = getLocalToVworldScale() * vworldToCoexistenceScale;
densityInEc = (float)(density / localToEcScale);
}
}
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