/*
* Copyright (c) 2009-2012 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions 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 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.renderer.queue;
import com.jme3.post.SceneProcessor;
import com.jme3.renderer.Camera;
import com.jme3.renderer.RenderManager;
import com.jme3.scene.Geometry;
import com.jme3.scene.Spatial;
/**
* <code>RenderQueue</code> is used to queue up and sort
* {@link Geometry geometries} for rendering.
*
* @author Kirill Vainer
*/
public class RenderQueue {
private GeometryList opaqueList;
private GeometryList guiList;
private GeometryList transparentList;
private GeometryList translucentList;
private GeometryList skyList;
/**
* Creates a new RenderQueue, the default {@link GeometryComparator comparators}
* are used for all {@link GeometryList geometry lists}.
*/
public RenderQueue() {
this.opaqueList = new GeometryList(new OpaqueComparator());
this.guiList = new GeometryList(new GuiComparator());
this.transparentList = new GeometryList(new TransparentComparator());
this.translucentList = new GeometryList(new TransparentComparator());
this.skyList = new GeometryList(new NullComparator());
}
/**
* The render queue <code>Bucket</code> specifies the bucket
* to which the spatial will be placed when rendered.
* <p>
* The behavior of the rendering will differ depending on which
* bucket the spatial is placed. A spatial's queue bucket can be set
* via {@link Spatial#setQueueBucket(com.jme3.renderer.queue.RenderQueue.Bucket) }.
*/
public enum Bucket {
/**
* The renderer will try to find the optimal order for rendering all
* objects using this mode.
* You should use this mode for most normal objects, except transparent
* ones, as it could give a nice performance boost to your application.
*/
Opaque,
/**
* This is the mode you should use for object with
* transparency in them. It will ensure the objects furthest away are
* rendered first. That ensures when another transparent object is drawn on
* top of previously drawn objects, you can see those (and the object drawn
* using Opaque) through the transparent parts of the newly drawn
* object.
*/
Transparent,
/**
* A special mode used for rendering really far away, flat objects -
* e.g. skies. In this mode, the depth is set to infinity so
* spatials in this bucket will appear behind everything, the downside
* to this bucket is that 3D objects will not be rendered correctly
* due to lack of depth testing.
*/
Sky,
/**
* A special mode used for rendering transparent objects that
* should not be effected by {@link SceneProcessor}.
* Generally this would contain translucent objects, and
* also objects that do not write to the depth buffer such as
* particle emitters.
*/
Translucent,
/**
* This is a special mode, for drawing 2D object
* without perspective (such as GUI or HUD parts).
* The spatial's world coordinate system has the range
* of [0, 0, -1] to [Width, Height, 1] where Width/Height is
* the resolution of the screen rendered to. Any spatials
* outside of that range are culled.
*/
Gui,
/**
* A special mode, that will ensure that this spatial uses the same
* mode as the parent Node does.
*/
Inherit,
}
/**
* <code>ShadowMode</code> is a marker used to specify how shadow
* effects should treat the spatial.
*/
public enum ShadowMode {
/**
* Disable both shadow casting and shadow receiving for this spatial.
* Generally used for special effects like particle emitters.
*/
Off,
/**
* Enable casting of shadows but not receiving them.
*/
Cast,
/**
* Enable receiving of shadows but not casting them.
*/
Receive,
/**
* Enable both receiving and casting of shadows.
*/
CastAndReceive,
/**
* Inherit the <code>ShadowMode</code> from the parent node.
*/
Inherit
}
/**
* Sets a different geometry comparator for the specified bucket, one
* of Gui, Opaque, Sky, Transparent, or Translucent. The GeometryComparators are
* used to sort the accumulated list of geometries before actual rendering
* occurs.
*
* <p>The most significant comparator is the one for the transparent
* bucket since there is no correct way to sort the transparent bucket
* that will handle all geometry all the time. In certain cases, the
* application may know the best way to sort and now has the option of
* configuring a specific implementation.</p>
*
* <p>The default comparators are:</p>
* <ul>
* <li>Bucket.Opaque: {@link com.jme3.renderer.queue.OpaqueComparator} which sorts
* by material first and front to back within the same material.
* <li>Bucket.Transparent: {@link com.jme3.renderer.queue.TransparentComparator} which
* sorts purely back to front by leading bounding edge with no material sort.
* <li>Bucket.Translucent: {@link com.jme3.renderer.queue.TransparentComparator} which
* sorts purely back to front by leading bounding edge with no material sort. this bucket is rendered after post processors.
* <li>Bucket.Sky: {@link com.jme3.renderer.queue.NullComparator} which does no sorting
* at all.
* <li>Bucket.Gui: {@link com.jme3.renderer.queue.GuiComparator} sorts geometries back to
* front based on their Z values.
*/
public void setGeometryComparator(Bucket bucket, GeometryComparator c) {
switch (bucket) {
case Gui:
guiList = new GeometryList(c);
break;
case Opaque:
opaqueList = new GeometryList(c);
break;
case Sky:
skyList = new GeometryList(c);
break;
case Transparent:
transparentList = new GeometryList(c);
break;
case Translucent:
translucentList = new GeometryList(c);
break;
default:
throw new UnsupportedOperationException("Unknown bucket type: " + bucket);
}
}
/**
* Returns the current GeometryComparator used by the specified bucket,
* one of Gui, Opaque, Sky, Transparent, or Translucent.
*/
public GeometryComparator getGeometryComparator(Bucket bucket) {
switch (bucket) {
case Gui:
return guiList.getComparator();
case Opaque:
return opaqueList.getComparator();
case Sky:
return skyList.getComparator();
case Transparent:
return transparentList.getComparator();
case Translucent:
return translucentList.getComparator();
default:
throw new UnsupportedOperationException("Unknown bucket type: " + bucket);
}
}
/**
* Adds a geometry to the given bucket.
* The {@link RenderManager} automatically handles this task
* when flattening the scene graph. The bucket to add
* the geometry is determined by {@link Geometry#getQueueBucket() }.
*
* @param g The geometry to add
* @param bucket The bucket to add to, usually
* {@link Geometry#getQueueBucket() }.
*/
public void addToQueue(Geometry g, Bucket bucket) {
switch (bucket) {
case Gui:
guiList.add(g);
break;
case Opaque:
opaqueList.add(g);
break;
case Sky:
skyList.add(g);
break;
case Transparent:
transparentList.add(g);
break;
case Translucent:
translucentList.add(g);
break;
default:
throw new UnsupportedOperationException("Unknown bucket type: " + bucket);
}
}
private void renderGeometryList(GeometryList list, RenderManager rm, Camera cam, boolean clear) {
list.setCamera(cam); // select camera for sorting
list.sort();
for (int i = 0; i < list.size(); i++) {
Geometry obj = list.get(i);
assert obj != null;
rm.renderGeometry(obj);
obj.queueDistance = Float.NEGATIVE_INFINITY;
}
if (clear) {
list.clear();
}
}
public void renderShadowQueue(GeometryList list, RenderManager rm, Camera cam, boolean clear) {
renderGeometryList(list, rm, cam, clear);
}
public boolean isQueueEmpty(Bucket bucket) {
switch (bucket) {
case Gui:
return guiList.size() == 0;
case Opaque:
return opaqueList.size() == 0;
case Sky:
return skyList.size() == 0;
case Transparent:
return transparentList.size() == 0;
case Translucent:
return translucentList.size() == 0;
default:
throw new UnsupportedOperationException("Unsupported bucket type: " + bucket);
}
}
public void renderQueue(Bucket bucket, RenderManager rm, Camera cam) {
renderQueue(bucket, rm, cam, true);
}
public void renderQueue(Bucket bucket, RenderManager rm, Camera cam, boolean clear) {
switch (bucket) {
case Gui:
renderGeometryList(guiList, rm, cam, clear);
break;
case Opaque:
renderGeometryList(opaqueList, rm, cam, clear);
break;
case Sky:
renderGeometryList(skyList, rm, cam, clear);
break;
case Transparent:
renderGeometryList(transparentList, rm, cam, clear);
break;
case Translucent:
renderGeometryList(translucentList, rm, cam, clear);
break;
default:
throw new UnsupportedOperationException("Unsupported bucket type: " + bucket);
}
}
public void clear() {
opaqueList.clear();
guiList.clear();
transparentList.clear();
translucentList.clear();
skyList.clear();
}
}