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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;
/**
* The PointAttributes object defines all attributes that apply to
* point primitives. The point attributes that can be defined are:<p>
* <ul>
* <li>Size - the size of the point, in pixels. The default is a point
* size of one pixel.</li><p>
* <li>Antialiasing - for points greater than one-pixel in size,
* antialiasing smooths the outline of the point when it is rendered.</li>
* <p></ul>
* If antialiasing is disabled (the default), fractional point sizes
* are rounded to integer sizes, and a screen-aligned square region
* of pixels is drawn.<p>
* <p>
* If antialiasing is enabled, the points are considered transparent
* for rendering purposes. They are rendered with all the other transparent
* objects and adhere to the other transparency settings such as the
* View transparency sorting policy and the View depth buffer freeze
* transparent enable.
* </p>
*
* @see Appearance
* @see View
*/
public class PointAttributes extends NodeComponent {
/**
* Specifies that this PointAttributes object allows reading its
* point size information.
*/
public static final int
ALLOW_SIZE_READ = CapabilityBits.POINT_ATTRIBUTES_ALLOW_SIZE_READ;
/**
* Specifies that this PointAttributes object allows writing its
* point size information.
*/
public static final int
ALLOW_SIZE_WRITE = CapabilityBits.POINT_ATTRIBUTES_ALLOW_SIZE_WRITE;
/**
* Specifies that this PointAttributes object allows reading its
* point antialiasing flag.
*/
public static final int
ALLOW_ANTIALIASING_READ = CapabilityBits.POINT_ATTRIBUTES_ALLOW_ANTIALIASING_READ;
/**
* Specifies that this PointAttributes object allows writing its
* point antialiasing flag.
*/
public static final int
ALLOW_ANTIALIASING_WRITE = CapabilityBits.POINT_ATTRIBUTES_ALLOW_ANTIALIASING_WRITE;
// Array for setting default read capabilities
private static final int[] readCapabilities = {
ALLOW_SIZE_READ,
ALLOW_ANTIALIASING_READ
};
/**
* Constructs a PointAttributes object with default parameters.
* The default values are as follows:
* <ul>
* point size : 1<br>
* point antialiasing : false<br>
* </ul>
*/
public PointAttributes(){
// set default read capabilities
setDefaultReadCapabilities(readCapabilities);
}
/**
* Constructs a PointAttributes object with specified values.
* @param pointSize the size of points, in pixels
* @param pointAntialiasing flag to set point antialising ON or OFF
*/
public PointAttributes(float pointSize, boolean pointAntialiasing){
// set default read capabilities
setDefaultReadCapabilities(readCapabilities);
((PointAttributesRetained)this.retained).initPointSize(pointSize);
((PointAttributesRetained)this.retained).initPointAntialiasingEnable(pointAntialiasing);
}
/**
* Sets the point size for this appearance component object.
* @param pointSize the size, in pixels, of point primitives
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public void setPointSize(float pointSize) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_SIZE_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("PointAttributes0"));
if (isLive())
((PointAttributesRetained)this.retained).setPointSize(pointSize);
else
((PointAttributesRetained)this.retained).initPointSize(pointSize);
}
/**
* Gets the point size for this appearance component object.
* @return the size, in pixels, of point primitives
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public float getPointSize() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_SIZE_READ))
throw new CapabilityNotSetException(J3dI18N.getString("PointAttributes1"));
return ((PointAttributesRetained)this.retained).getPointSize();
}
/**
* Enables or disables point antialiasing
* for this appearance component object.
* <p>
* If antialiasing is enabled, the points are considered transparent
* for rendering purposes. They are rendered with all the other
* transparent objects and adhere to the other transparency settings
* such as the View transparency sorting policy and the View depth
* buffer freeze transparent enable.
* </p>
* @param state true or false to enable or disable point antialiasing
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
* @see View
*/
public void setPointAntialiasingEnable(boolean state) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_ANTIALIASING_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("PointAttributes2"));
if (isLive())
((PointAttributesRetained)this.retained).setPointAntialiasingEnable(state);
else
((PointAttributesRetained)this.retained).initPointAntialiasingEnable(state);
}
/**
* Retrieves the state of the point antialiasing flag.
* @return true if point antialiasing is enabled,
* false if point antialiasing is disabled
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public boolean getPointAntialiasingEnable() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_ANTIALIASING_READ))
throw new CapabilityNotSetException(J3dI18N.getString("PointAttributes3"));
return ((PointAttributesRetained)this.retained).getPointAntialiasingEnable();
}
/**
* Creates a retained mode PointAttributesRetained object that this
* PointAttributes component object will point to.
*/
@Override
void createRetained() {
this.retained = new PointAttributesRetained();
this.retained.setSource(this);
}
/**
* @deprecated replaced with cloneNodeComponent(boolean forceDuplicate)
*/
@Override
public NodeComponent cloneNodeComponent() {
PointAttributes pa = new PointAttributes();
pa.duplicateNodeComponent(this);
return pa;
}
/**
* Copies all node information from <code>originalNodeComponent</code> into
* the current node. This method is called from the
* <code>duplicateNode</code> method. This routine does
* the actual duplication of all "local data" (any data defined in
* this object).
*
* @param originalNodeComponent the original node to duplicate.
* @param forceDuplicate when set to <code>true</code>, causes the
* <code>duplicateOnCloneTree</code> flag to be ignored. When
* <code>false</code>, the value of each node's
* <code>duplicateOnCloneTree</code> variable determines whether
* NodeComponent data is duplicated or copied.
*
* @see Node#cloneTree
* @see NodeComponent#setDuplicateOnCloneTree
*/
@Override
void duplicateAttributes(NodeComponent originalNodeComponent,
boolean forceDuplicate) {
super.duplicateAttributes(originalNodeComponent, forceDuplicate);
PointAttributesRetained attr = (PointAttributesRetained)
originalNodeComponent.retained;
PointAttributesRetained rt = (PointAttributesRetained) retained;
rt.initPointSize(attr.getPointSize());
rt.initPointAntialiasingEnable(attr.getPointAntialiasingEnable());
}
}
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