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/*
* Copyright 1998-2008 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.Color4f;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
/**
* This class implements a Shape3D backend for the abstract
* GeometryDecompressor.
*/
class GeometryDecompressorShape3D extends GeometryDecompressor {
private static final boolean debug = false ;
private static final boolean benchmark = false ;
private static final boolean statistics = false ;
private static final boolean printInfo = debug || benchmark || statistics ;
// Type of connections in the compressed data:
// TYPE_POINT (1), TYPE_LINE (2), or TYPE_TRIANGLE (4).
private int bufferDataType ;
// Data bundled with each vertex: bitwise combination of
// NORMAL_IN_BUFFER (1), COLOR_IN_BUFFER (2), ALPHA_IN_BUFFER (4).
private int dataPresent ;
// List for accumulating the output of the decompressor and converting to
// GeometryArray representations.
private GeneralizedVertexList vlist ;
// Accumulates Shape3D objects constructed from decompressor output.
private ArrayList shapes ;
// Decompressor output state variables.
private Color4f curColor ;
private Vector3f curNormal ;
// Variables for gathering statistics.
private int origVertexCount ;
private int stripCount ;
private int vertexCount ;
private int triangleCount ;
private long startTime ;
private long endTime ;
// Triangle array type to construct.
private int triOutputType ;
// Types of triangle output available.
private static final int TRI_SET = 0 ;
private static final int TRI_STRIP_SET = 1 ;
private static final int TRI_STRIP_AND_FAN_SET = 2 ;
private static final int TRI_STRIP_AND_TRI_SET = 3 ;
// Private convenience copies of various constants.
private static final int TYPE_POINT =
CompressedGeometryRetained.TYPE_POINT ;
private static final int TYPE_LINE =
CompressedGeometryRetained.TYPE_LINE ;
private static final int TYPE_TRIANGLE =
CompressedGeometryRetained.TYPE_TRIANGLE ;
private static final int FRONTFACE_CCW =
GeneralizedStripFlags.FRONTFACE_CCW ;
/**
* Decompress the given compressed geometry.
* @param cgr CompressedGeometryRetained object with compressed geometry
* @return an array of Shape3D with TriangleArray geometry if compressed
* data contains triangles; otherwise, Shape3D array containing PointArray
* or LineStripArray geometry
* @see CompressedGeometry
* @see GeometryDecompressor
*/
Shape3D[] toTriangleArrays(CompressedGeometryRetained cgr) {
return decompress(cgr, TRI_SET) ;
}
/**
* Decompress the given compressed geometry.
* @param cgr CompressedGeometryRetained object with compressed geometry
* @return an array of Shape3D with TriangleStripArray geometry if
* compressed data contains triangles; otherwise, Shape3D array containing
* PointArray or LineStripArray geometry
* @see CompressedGeometry
* @see GeometryDecompressor
*/
Shape3D[] toTriangleStripArrays(CompressedGeometryRetained cgr) {
return decompress(cgr, TRI_STRIP_SET) ;
}
/**
* Decompress the given compressed geometry.
* @param cgr CompressedGeometryRetained object with compressed geometry
* @return an array of Shape3D with TriangleStripArray and
* TriangleFanArray geometry if compressed data contains triangles;
* otherwise, Shape3D array containing PointArray or LineStripArray
* geometry
* @see CompressedGeometry
* @see GeometryDecompressor
*/
Shape3D[] toStripAndFanArrays(CompressedGeometryRetained cgr) {
return decompress(cgr, TRI_STRIP_AND_FAN_SET) ;
}
/**
* Decompress the given compressed geometry.
* @param cgr CompressedGeometryRetained object with compressed geometry
* @return an array of Shape3D with TriangleStripArray and
* TriangleArray geometry if compressed data contains triangles;
* otherwise, Shape3D array containing PointArray or LineStripArray
* geometry
* @see CompressedGeometry
* @see GeometryDecompressor
*/
Shape3D[] toStripAndTriangleArrays(CompressedGeometryRetained cgr) {
return decompress(cgr, TRI_STRIP_AND_TRI_SET) ;
}
/**
* Decompress the data contained in a CompressedGeometryRetained and
* return an array of Shape3D objects using the specified triangle output
* type. The triangle output type is ignored if the compressed data
* contains points or lines.
*/
private Shape3D[] decompress(CompressedGeometryRetained cgr,
int triOutputType) {
if (! checkVersion(cgr.majorVersionNumber, cgr.minorVersionNumber)) {
return null ;
}
vlist = null ;
curColor = null ;
curNormal = null ;
// Get descriptors for compressed data.
bufferDataType = cgr.bufferType ;
dataPresent = cgr.bufferContents ;
if (printInfo) beginPrint() ;
// Initialize the decompressor backend.
this.triOutputType = triOutputType ;
shapes = new ArrayList() ;
// Call the superclass decompress() method which calls the output
// methods of this subclass. The results are stored in vlist.
super.decompress(cgr.offset, cgr.size, cgr.compressedGeometry) ;
// Convert the decompressor output to Shape3D objects.
addShape3D() ;
if (printInfo) endPrint() ;
// Return the fixed-length output array.
Shape3D shapeArray[] = new Shape3D[shapes.size()] ;
return (Shape3D[])shapes.toArray(shapeArray) ;
}
/**
* Initialize the vertex output list based on the vertex format provided
* by the SetState decompression command.
*/
@Override
void outputVertexFormat(boolean bundlingNorm, boolean bundlingColor,
boolean doingAlpha) {
if (vlist != null)
// Construct shapes using the current vertex format.
addShape3D() ;
int vertexFormat = GeometryArray.COORDINATES ;
if (bundlingNorm) vertexFormat |= GeometryArray.NORMALS ;
if (bundlingColor) vertexFormat |= GeometryArray.COLOR ;
if (doingAlpha) vertexFormat |= GeometryArray.WITH_ALPHA ;
vlist = new GeneralizedVertexList(vertexFormat, FRONTFACE_CCW) ;
}
/**
* Add a new decompressed vertex to the current list.
*/
@Override
void outputVertex(Point3f position, Vector3f normal,
Color4f color, int vertexReplaceCode) {
if (curNormal != null) normal = curNormal ;
vlist.addVertex(position, normal, color, vertexReplaceCode) ;
if (debug) {
System.err.println(" outputVertex: flag " + vertexReplaceCode) ;
System.err.println(" position " + position.toString()) ;
if (normal != null)
System.err.println(" normal " + normal.toString()) ;
if (color != null)
System.err.println(" color " + color.toString()) ;
}
}
/**
* Create a Shape3D using the current color for both the ambient and
* diffuse material colors, then start a new vertex list for the new
* color. The outputColor() method is never called if colors are bundled
* with each vertex in the compressed buffer.
*/
@Override
void outputColor(Color4f color) {
if (debug) System.err.println(" outputColor: " + color.toString()) ;
if (vlist.size() > 0) {
// Construct Shape3D using the current color.
addShape3D() ;
// Start a new vertex list for the new color.
vlist = new GeneralizedVertexList(vlist.vertexFormat,
FRONTFACE_CCW) ;
}
if (curColor == null) curColor = new Color4f() ;
curColor.set(color) ;
}
/**
* Set the current normal that will be copied to each succeeding vertex
* output by the decompressor. The per-vertex copy is needed since in
* Java 3D a normal is always associated with a vertex. This method is
* never called if normals are bundled with each vertex in the compressed
* buffer.
*/
@Override
void outputNormal(Vector3f normal) {
if (debug) System.err.println(" outputNormal: " + normal.toString()) ;
if ((vlist.vertexFormat & GeometryArray.NORMALS) == 0) {
if (vlist.size() > 0)
// Construct Shape3D using the current vertex format.
addShape3D() ;
// Start a new vertex list with the new format.
vlist = new GeneralizedVertexList
(vlist.vertexFormat|GeometryArray.NORMALS, FRONTFACE_CCW) ;
}
if (curNormal == null) curNormal = new Vector3f() ;
curNormal.set(normal) ;
}
/**
* Create a Shape3D object of the desired type from the current vertex
* list. Apply the current color, if non-null, as a Material attribute.
*/
private void addShape3D() {
Material m = new Material() ;
if (curColor != null) {
if ((vlist.vertexFormat & GeometryArray.WITH_ALPHA) == 0) {
m.setAmbientColor(curColor.x, curColor.y, curColor.z) ;
m.setDiffuseColor(curColor.x, curColor.y, curColor.z) ;
}
else {
m.setAmbientColor(curColor.x, curColor.y, curColor.z) ;
m.setDiffuseColor(curColor.x, curColor.y, curColor.z,
curColor.w) ;
}
}
if ((vlist.vertexFormat & GeometryArray.NORMALS) == 0)
m.setLightingEnable(false) ;
else
m.setLightingEnable(true) ;
Appearance a = new Appearance() ;
a.setMaterial(m) ;
switch(bufferDataType) {
case TYPE_TRIANGLE:
switch(triOutputType) {
case TRI_SET:
TriangleArray ta = vlist.toTriangleArray() ;
if (ta != null)
shapes.add(new Shape3D(ta, a)) ;
break ;
case TRI_STRIP_SET:
TriangleStripArray tsa = vlist.toTriangleStripArray() ;
if (tsa != null)
shapes.add(new Shape3D(tsa, a)) ;
break ;
case TRI_STRIP_AND_FAN_SET:
GeometryStripArray gsa[] = vlist.toStripAndFanArrays() ;
if (gsa[0] != null)
shapes.add(new Shape3D(gsa[0], a)) ;
if (gsa[1] != null)
shapes.add(new Shape3D(gsa[1], a)) ;
break ;
case TRI_STRIP_AND_TRI_SET:
GeometryArray ga[] = vlist.toStripAndTriangleArrays() ;
if (ga[0] != null)
shapes.add(new Shape3D(ga[0], a)) ;
if (ga[1] != null)
shapes.add(new Shape3D(ga[1], a)) ;
break ;
default:
throw new IllegalArgumentException
(J3dI18N.getString("GeometryDecompressorShape3D0")) ;
}
break ;
case TYPE_LINE:
LineStripArray lsa = vlist.toLineStripArray() ;
if (lsa != null)
shapes.add(new Shape3D(lsa, a)) ;
break ;
case TYPE_POINT:
PointArray pa = vlist.toPointArray() ;
if (pa != null)
shapes.add(new Shape3D(pa, a)) ;
break ;
default:
throw new IllegalArgumentException
(J3dI18N.getString("GeometryDecompressorShape3D1")) ;
}
if (benchmark || statistics) {
origVertexCount += vlist.size() ;
vertexCount += vlist.vertexCount ;
stripCount += vlist.stripCount ;
triangleCount += vlist.triangleCount ;
}
}
private void beginPrint() {
System.err.println("\nGeometryDecompressorShape3D") ;
switch(bufferDataType) {
case TYPE_TRIANGLE:
System.err.println(" buffer TYPE_TRIANGLE") ;
break ;
case TYPE_LINE:
System.err.println(" buffer TYPE_LINE") ;
break ;
case TYPE_POINT:
System.err.println(" buffer TYPE_POINT") ;
break ;
default:
throw new IllegalArgumentException
(J3dI18N.getString("GeometryDecompressorShape3D1")) ;
}
System.err.print(" buffer data present: coords") ;
if ((dataPresent & CompressedGeometryHeader.NORMAL_IN_BUFFER) != 0)
System.err.print(" normals") ;
if ((dataPresent & CompressedGeometryHeader.COLOR_IN_BUFFER) != 0)
System.err.print(" colors") ;
if ((dataPresent & CompressedGeometryHeader.ALPHA_IN_BUFFER) != 0)
System.err.print(" alpha") ;
System.err.println() ;
stripCount = 0 ;
vertexCount = 0 ;
triangleCount = 0 ;
origVertexCount = 0 ;
startTime = J3dClock.currentTimeMillis() ;
}
private void endPrint() {
endTime = J3dClock.currentTimeMillis() ;
if (benchmark || statistics)
printBench() ;
if (statistics)
printStats() ;
}
private void printBench() {
float t = (endTime - startTime) / 1000.0f ;
System.err.println
(" decompression + strip conversion took " + t + " sec.") ;
switch(bufferDataType) {
case TYPE_POINT:
System.err.println
(" points decompressed: " + vertexCount + "\n" +
" net decompression rate: " + (vertexCount/t) +
" points/sec.\n") ;
break ;
case TYPE_LINE:
System.err.println
(" lines decompressed: " + (vertexCount - stripCount) + "\n" +
" net decompression rate: " + ((vertexCount - stripCount)/t) +
" lines/sec.\n") ;
break ;
case TYPE_TRIANGLE:
System.err.println
(" triangles decompressed: " +
(vertexCount - 2*stripCount) + "\n" +
" net decompression rate: " +
((vertexCount - 2*stripCount)/t) + " triangles/sec.\n") ;
break ;
}
}
private void printStats() {
switch(triOutputType) {
case TRI_SET:
System.err.println(" using individual triangle output") ;
break ;
case TRI_STRIP_SET:
System.err.println(" using strip output") ;
break ;
case TRI_STRIP_AND_FAN_SET:
System.err.println(" using strips and fans for output") ;
break ;
case TRI_STRIP_AND_TRI_SET:
System.err.println(" using strips and triangles for output") ;
break ;
}
System.err.print
(" number of Shape3D objects: " + shapes.size() +
"\n number of Shape3D decompressed vertices: ") ;
if (triOutputType == TRI_SET || bufferDataType == TYPE_POINT) {
System.err.println(vertexCount) ;
}
else if (triOutputType == TRI_STRIP_AND_TRI_SET) {
System.err.println((vertexCount + triangleCount*3) +
"\n number of strips: " + stripCount +
"\n number of individual triangles: " +
triangleCount) ;
if (stripCount > 0)
System.err.println
(" vertices/strip: " + (float)vertexCount/stripCount +
"\n triangles represented in strips: " +
(vertexCount - 2*stripCount)) ;
}
else {
System.err.println(vertexCount +
"\n number of strips: " + stripCount) ;
if (stripCount > 0)
System.err.println
(" vertices/strip: " + (float)vertexCount/stripCount) ;
}
System.err.print(" vertex data present in last Shape3D: coords") ;
if ((vlist.vertexFormat & GeometryArray.NORMALS) != 0)
System.err.print(" normals") ;
if ((vlist.vertexFormat & GeometryArray.COLOR) != 0) {
System.err.print(" colors") ;
if ((vlist.vertexFormat & GeometryArray.WITH_ALPHA) != 0)
System.err.print(" alpha") ;
}
System.err.println() ;
}
}