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Jmol: an open-source Java viewer for chemical structures in 3D
/* $RCSfile$
* $Author: aherraez $
* $Date: 2009-01-15 21:00:00 +0100 (Thu, 15 Jan 2009) $
* $Revision: 7752 $
*
* Copyright (C) 2003-2009 The Jmol Development Team
*
* Contact: [email protected]
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jmol.export;
import java.io.ByteArrayOutputStream;
import java.util.Map;
import javajs.awt.Font;
import javajs.util.A4;
import javajs.util.Lst;
import javajs.util.M4;
import javajs.util.Measure;
import javajs.util.OC;
import javajs.util.P3;
import javajs.util.T3;
import javajs.util.BS;
import org.jmol.util.Logger;
import org.jmol.viewer.Viewer;
/**
* STereoLithography file format exporter
* for 3D printing.
*
* Based on _VrmlExporter by Bob Hanson;
* diverts the output() method to do nothing and
* delivers only triangle sets.
*
* Note that no attempt is made here to ensure that
* surfaces are closed.
*
* Also, an inefficient mechanism that involves creating a
* full in-memory representation of the data is used. If this
* turns out to be problematic, it might be possible to use
* random access, but the applet does not have that capability,
* and certainly JavaScript does not.
*
*/
public class _StlExporter extends _VrmlExporter {
private boolean isDebug;
private String header;
private OC oc;
private ByteArrayOutputStream bos;
private M4 m4;
public _StlExporter() {
super();
useTable = null;
noColor = true;
isDebug = Logger.debugging;
if (!isDebug) {
oc = new OC();
oc.setBigEndian(false);
oc.setParams(null, null, false, bos = new ByteArrayOutputStream());
}
}
@Override
protected void outputHeader() {
//checkFile("c:/temp/t0.stl");
header = ("solid model generated by Jmol " + Viewer.getJmolVersion() + " ")
.substring(0, 80);
if (isDebug) {
out.append(header);
out.append("\n");
} else {
oc.write(header.getBytes(), 0, 80);
oc.write(new byte[4], 0, 4);
}
lstMatrix = new Lst();
m4 = new M4();
m4.setIdentity();
lstMatrix.addLast(m4);
outputInitialTransform();
}
/*
solid STL generated by MeshLab
facet normal 1.861127e-001 -5.750880e-001 -7.966405e-001
outer loop
vertex -4.747652e-002 2.344544e+000 -2.530380e-001
vertex -1.776902e-002 2.436463e+000 -3.124530e-001
vertex 6.051898e-002 2.379494e+000 -2.530380e-001
endloop
endfacet
*/
Lst lstMatrix;
@Override
protected void pushMatrix() {
lstMatrix.addLast(m4);
m4 = M4.newM4(m4);
}
@Override
protected void popMatrix() {
m4 = lstMatrix.removeItemAt(lstMatrix.size() - 1);
}
@Override
protected void output(String data) {
// not used!
}
@Override
protected void outputChildStart() {
// not used!
}
@Override
protected void outputChildClose() {
// not used!
}
private M4 m4a = new M4();
@Override
protected void outputRotation(A4 a) {
m4a.setToAA(a);
m4.mul(m4a);
}
@Override
protected void outputAttrPt(String attr, T3 pt) {
outputAttr(attr, pt.x, pt.y, pt.z);
}
@Override
protected void outputAttr(String attr, float x, float y, float z) {
m4a.setIdentity();
if (attr == "scale") {
m4a.m00 = x;
m4a.m11 = y;
m4a.m22 = z;
} else if (attr == "translation") {
m4a.m03 = x;
m4a.m13 = y;
m4a.m23 = z;
}
m4.mul(m4a);
}
private int nTri;
@Override
protected void outputGeometry(T3[] vertices, T3[] normals, short[] colixes,
int[][] indices, short[] polygonColixes,
int nVertices, int nPolygons,
BS bsPolygons, int faceVertexMax,
Lst colorList, Map htColixes, P3 offset) {
for (int i = 0; i < nPolygons; i++) {
if (bsPolygons != null && !bsPolygons.get(i))
continue;
int[] face = indices[i];
writeFacet(vertices, face, 0, 1, 2);
if (faceVertexMax == 4 && face.length >= 4 && face[2] != face[3])
writeFacet(vertices, face, 2, 3, 0);
}
}
private void writeFacet(T3[] vertices, int[] face, int i, int j, int k) {
tempQ1.setT(vertices[face[i]]);
tempQ2.setT(vertices[face[j]]);
tempQ3.setT(vertices[face[k]]);
m4.rotTrans(tempQ1);
m4.rotTrans(tempQ2);
m4.rotTrans(tempQ3);
Measure.calcNormalizedNormal(tempQ1, tempQ2, tempQ3, tempV1, tempV2);
if (Float.isNaN(tempV1.x)) {
return; // just a line -- can happen in cartoon meshes
}
writePoint("facet normal", tempV1);
writePoint("outer loop\nvertex", tempQ1);
writePoint("vertex", tempQ2);
writePoint("vertex", tempQ3);
if (isDebug) {
out.append("endloop\nendfacet\n");
} else {
oc.writeByteAsInt(0);
oc.writeByteAsInt(0);
}
nTri++;
}
@Override
protected String finalizeOutput() {
if (isDebug) {
out.append("endsolid model\n");
} else {
byte[] b = bos.toByteArray();
b[80] = (byte) (nTri & 0xff);
b[81] = (byte) ((nTri >> 8) & 0xff);
b[82] = (byte) ((nTri >> 16) & 0xff);
b[83] = (byte) ((nTri >> 24) & 0xff);
out.write(b, 0, b.length);
}
return finalizeOutput2();
}
@Override
protected void outputCircle(P3 pt1, P3 pt2, float radius, short colix,
boolean doFill) {
// not implemented for solids
}
@Override
void plotText(int x, int y, int z, short colix, String text, Font font3d) {
// not implemented for solids
}
/////////////// raw ASCII/binary write methods
private void writePoint(String s, T3 p) {
if (isDebug)
out.append(s);
writeFloat(p.x);
writeFloat(p.y);
writeFloat(p.z);
if (isDebug)
out.append("\n");
}
private void writeFloat(float f) {
if (isDebug)
out.append(" " + f);
else
oc.writeInt(Float.floatToIntBits(f));
}
//@SuppressWarnings("unused")
//private void checkFile(String fname) {
// BinaryDocument doc = new BinaryDocument();
// doc.setStream((BufferedInputStream) vwr.fm
// .getBufferedReaderOrErrorMessageFromName(fname, null, true, false),
// false);
// try {
// for (int j = 0; j < 20; j++)
// doc.readInt();
// System.out.println(doc.readInt());
// for (int j = 0; j < 10; j++) {
// for (int k = 0; k < 12; k++) {
// float f = doc.readFloat();
// System.out.println(j + " " + f + "\t"
// + Integer.toHexString(Float.floatToIntBits(f)));
// if (k % 3 == 2)
// System.out.println("");
// }
// System.out.println(j + " " + doc.readShort() + "\n");
// }
// } catch (Exception e) {
// // ignore
// }
// doc.close();
//}
}
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