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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 PolygonAttributes object defines attributes for rendering polygon
* primitives.
* Polygon primitives include triangles, triangle strips, triangle fans,
* and quads.
* The polygon attributes that can be defined are:
*
* - Rasterization mode - defines how the polygon is drawn: as points,
* outlines, or filled.
*
* - POLYGON_POINT - the polygon is rendered as points
* drawn at the vertices.
*
- POLYGON_LINE - the polygon is rendered as lines
* drawn between consecutive vertices.
*
- POLYGON_FILL - the polygon is rendered by filling the interior
* between the vertices. The default mode.
*
* - Face culling - defines which polygons are culled (discarded)
* before they are converted to screen coordinates.
*
* - CULL_NONE - disables face culling.
* - CULL_BACK - culls all back-facing polygons. The default.
* - CULL_FRONT - culls all front-facing polygons.
*
* - Back-face normal flip - specifies whether vertex normals of
* back-facing polygons are flipped (negated) prior to lighting. The
* setting is either true, meaning to flip back-facing normals, or
* false. The default is false.
*
*
- Offset - the depth values of all pixels generated by polygon
* rasterization can be offset by a value that is computed for that
* polygon. Two values are used to specify the offset:
*
* - Offset bias - the constant polygon offset that is added to
* the final device coordinate Z value of polygon primitives.
*
*
- Offset factor - the factor to be multiplied by the
* slope of the polygon and then added to the final, device coordinate
* Z value of the polygon primitives.
*
* These values can be either positive or negative. The default
* for both of these values is 0.0.
*
*
* @see Appearance
*/
public class PolygonAttributes extends NodeComponent {
/**
* Specifies that this PolygonAttributes object allows reading its
* cull face information.
*/
public static final int
ALLOW_CULL_FACE_READ = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_CULL_FACE_READ;
/**
* Specifies that this PolygonAttributes object allows writing its
* cull face information.
*/
public static final int
ALLOW_CULL_FACE_WRITE = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_CULL_FACE_WRITE;
/**
* Specifies that this PolygonAttributes object allows reading its
* back face normal flip flag.
*/
public static final int
ALLOW_NORMAL_FLIP_READ = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_NORMAL_FLIP_READ;
/**
* Specifies that this PolygonAttributes object allows writing its
* back face normal flip flag.
*/
public static final int
ALLOW_NORMAL_FLIP_WRITE = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_NORMAL_FLIP_WRITE;
/**
* Specifies that this PolygonAttributes object allows reading its
* polygon mode information.
*/
public static final int
ALLOW_MODE_READ = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_MODE_READ;
/**
* Specifies that this PolygonAttributes object allows writing its
* polygon mode information.
*/
public static final int
ALLOW_MODE_WRITE = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_MODE_WRITE;
/**
* Specifies that this PolygonAttributes object allows reading its
* polygon offset information.
*/
public static final int
ALLOW_OFFSET_READ = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_OFFSET_READ;
/**
* Specifies that this PolygonAttributes object allows writing its
* polygon offset information.
*/
public static final int
ALLOW_OFFSET_WRITE = CapabilityBits.POLYGON_ATTRIBUTES_ALLOW_OFFSET_WRITE;
// Polygon rasterization modes
/**
* Render polygonal primitives as points drawn at the vertices
* of the polygon.
*/
public static final int POLYGON_POINT = 0;
/**
* Render polygonal primitives as lines drawn between consecutive
* vertices of the polygon.
*/
public static final int POLYGON_LINE = 1;
/**
* Render polygonal primitives by filling the interior of the polygon.
*/
public static final int POLYGON_FILL = 2;
/**
* Don't perform any face culling.
*/
public static final int CULL_NONE = 0;
/**
* Cull all back-facing polygons. This is the default mode.
*/
public static final int CULL_BACK = 1;
/**
* Cull all front-facing polygons.
*/
public static final int CULL_FRONT = 2;
// Array for setting default read capabilities
private static final int[] readCapabilities = {
ALLOW_CULL_FACE_READ,
ALLOW_MODE_READ,
ALLOW_NORMAL_FLIP_READ,
ALLOW_OFFSET_READ
};
/**
* Constructs a PolygonAttributes object with default parameters.
* The default values are as follows:
*
* cull face : CULL_BACK
* back face normal flip : false
* polygon mode : POLYGON_FILL
* polygon offset : 0.0
* polygon offset factor : 0.0
*
*/
public PolygonAttributes() {
// Just use defaults for all attributes
// set default read capabilities
setDefaultReadCapabilities(readCapabilities);
}
/**
* Constructs a PolygonAttributes object with specified values.
* @param polygonMode polygon rasterization mode; one of POLYGON_POINT,
* POLYGON_LINE, or POLYGON_FILL
* @param cullFace polygon culling mode; one of CULL_NONE,
* CULL_BACK, or CULL_FRONT
* @param polygonOffset constant polygon offset
*/
public PolygonAttributes(int polygonMode,
int cullFace,
float polygonOffset) {
this(polygonMode, cullFace, polygonOffset, false, 0.0f);
}
/**
* Constructs PolygonAttributes object with specified values.
* @param polygonMode polygon rasterization mode; one of POLYGON_POINT,
* POLYGON_LINE, or POLYGON_FILL
* @param cullFace polygon culling mode; one of CULL_NONE,
* CULL_BACK, or CULL_FRONT
* @param polygonOffset constant polygon offset
* @param backFaceNormalFlip back face normal flip flag; true or false
*/
public PolygonAttributes(int polygonMode,
int cullFace,
float polygonOffset,
boolean backFaceNormalFlip) {
this(polygonMode, cullFace, polygonOffset, backFaceNormalFlip, 0.0f);
}
/**
* Constructs PolygonAttributes object with specified values.
* @param polygonMode polygon rasterization mode; one of POLYGON_POINT,
* POLYGON_LINE, or POLYGON_FILL
* @param cullFace polygon culling mode; one of CULL_NONE,
* CULL_BACK, or CULL_FRONT
* @param polygonOffset constant polygon offset
* @param backFaceNormalFlip back face normal flip flag; true or false
* @param polygonOffsetFactor polygon offset factor for slope-based polygon
* offset
*
* @since Java 3D 1.2
*/
public PolygonAttributes(int polygonMode,
int cullFace,
float polygonOffset,
boolean backFaceNormalFlip,
float polygonOffsetFactor) {
if (polygonMode < POLYGON_POINT || polygonMode > POLYGON_FILL)
throw new IllegalArgumentException(J3dI18N.getString("PolygonAttributes0"));
if (cullFace < CULL_NONE || cullFace > CULL_FRONT)
throw new IllegalArgumentException(J3dI18N.getString("PolygonAttributes12"));
// set default read capabilities
setDefaultReadCapabilities(readCapabilities);
((PolygonAttributesRetained)this.retained).initPolygonMode(polygonMode);
((PolygonAttributesRetained)this.retained).initCullFace(cullFace);
((PolygonAttributesRetained)this.retained).initPolygonOffset(polygonOffset);
((PolygonAttributesRetained)this.retained).initBackFaceNormalFlip(backFaceNormalFlip);
((PolygonAttributesRetained)this.retained).initPolygonOffsetFactor(polygonOffsetFactor);
}
/**
* Sets the face culling for this
* appearance component object.
* @param cullFace the face to be culled, one of:
* CULL_NONE, CULL_FRONT, or CULL_BACK
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public void setCullFace(int cullFace) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_CULL_FACE_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes2"));
if (cullFace < CULL_NONE || cullFace > CULL_FRONT)
throw new IllegalArgumentException(J3dI18N.getString("PolygonAttributes3"));
if (isLive())
((PolygonAttributesRetained)this.retained).setCullFace(cullFace);
else
((PolygonAttributesRetained)this.retained).initCullFace(cullFace);
}
/**
* Gets the face culling for this
* appearance component object.
* @return the face to be culled
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public int getCullFace() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_CULL_FACE_READ))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes4"));
return ((PolygonAttributesRetained)this.retained).getCullFace();
}
/**
* Sets the back face normal flip flag to the specified value.
* This flag indicates whether vertex normals of back facing polygons
* should be flipped (negated) prior to lighting. When this flag
* is set to true and back face culling is disabled, polygons are
* rendered as if the polygon had two sides with opposing normals.
* This feature is disabled by default.
* @param backFaceNormalFlip the back face normal flip flag
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public void setBackFaceNormalFlip(boolean backFaceNormalFlip) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_NORMAL_FLIP_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes5"));
if (isLive())
((PolygonAttributesRetained)this.retained).setBackFaceNormalFlip(backFaceNormalFlip);
else
((PolygonAttributesRetained)this.retained).initBackFaceNormalFlip(backFaceNormalFlip);
}
/**
* Gets the back face normal flip flag.
* @return the back face normal flip flag
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public boolean getBackFaceNormalFlip() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_NORMAL_FLIP_READ))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes6"));
return ((PolygonAttributesRetained)this.retained).getBackFaceNormalFlip();
}
/**
* Sets the polygon rasterization mode for this
* appearance component object.
* @param polygonMode the polygon rasterization mode to be used; one of
* POLYGON_FILL, POLYGON_LINE, or POLYGON_POINT
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public void setPolygonMode(int polygonMode) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_MODE_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes7"));
if (polygonMode < POLYGON_POINT || polygonMode > POLYGON_FILL)
throw new IllegalArgumentException(J3dI18N.getString("PolygonAttributes8"));
if (isLive())
((PolygonAttributesRetained)this.retained).setPolygonMode(polygonMode);
else
((PolygonAttributesRetained)this.retained).initPolygonMode(polygonMode);
}
/**
* Gets the polygon rasterization mode for this
* appearance component object.
* @return the polygon rasterization mode
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public int getPolygonMode() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_MODE_READ))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes9"));
return ((PolygonAttributesRetained)this.retained).getPolygonMode();
}
/**
* Sets the constant polygon offset to the specified value.
* This screen space
* offset is added to the final, device coordinate Z value of polygon
* primitives.
* @param polygonOffset the constant polygon offset
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public void setPolygonOffset(float polygonOffset) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_OFFSET_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes10"));
if (isLive())
((PolygonAttributesRetained)this.retained).setPolygonOffset(polygonOffset);
else
((PolygonAttributesRetained)this.retained).initPolygonOffset(polygonOffset);
}
/**
* Gets the constant polygon offset.
* @return the constant polygon offset
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public float getPolygonOffset() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_OFFSET_READ))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes11"));
return ((PolygonAttributesRetained)this.retained).getPolygonOffset();
}
/**
* Sets the polygon offset factor to the specified value.
* This factor is multiplied by the slope of the polygon, and
* then added to the final, device coordinate Z value of polygon
* primitives.
* @param polygonOffsetFactor the polygon offset factor
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*
* @since Java 3D 1.2
*/
public void setPolygonOffsetFactor(float polygonOffsetFactor) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_OFFSET_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes10"));
if (isLive())
((PolygonAttributesRetained)this.retained).
setPolygonOffsetFactor(polygonOffsetFactor);
else
((PolygonAttributesRetained)this.retained).
initPolygonOffsetFactor(polygonOffsetFactor);
}
/**
* Gets the polygon offset factor.
* @return the polygon offset factor.
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*
* @since Java 3D 1.2
*/
public float getPolygonOffsetFactor() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_OFFSET_READ))
throw new CapabilityNotSetException(J3dI18N.getString("PolygonAttributes11"));
return ((PolygonAttributesRetained)this.retained).getPolygonOffsetFactor();
}
/**
* Creates a retained mode PolygonAttributesRetained object that this
* PolygonAttributes component object will point to.
*/
@Override
void createRetained() {
this.retained = new PolygonAttributesRetained();
this.retained.setSource(this);
}
/**
* @deprecated replaced with cloneNodeComponent(boolean forceDuplicate)
*/
@Override
public NodeComponent cloneNodeComponent() {
PolygonAttributes pga = new PolygonAttributes();
pga.duplicateNodeComponent(this);
return pga;
}
/**
* Copies all node information from originalNodeComponent into
* the current node. This method is called from the
* duplicateNode 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 true, causes the
* duplicateOnCloneTree flag to be ignored. When
* false, the value of each node's
* duplicateOnCloneTree 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);
PolygonAttributesRetained attr = (PolygonAttributesRetained)
originalNodeComponent.retained;
PolygonAttributesRetained rt = (PolygonAttributesRetained) retained;
rt.initCullFace(attr.getCullFace());
rt.initBackFaceNormalFlip(attr.getBackFaceNormalFlip());
rt.initPolygonMode(attr.getPolygonMode());
rt.initPolygonOffset(attr.getPolygonOffset());
rt.initPolygonOffsetFactor(attr.getPolygonOffsetFactor());
}
}