svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libDwg / src / org / gvsig / dwg / lib / readers / v15 / DwgLwPolylineReader15.java @ 28969
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/*
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* Created on 25-ene-2007 by azabala
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*
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*/
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package org.gvsig.dwg.lib.readers.v15; |
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import java.awt.geom.Point2D; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.gvsig.dwg.lib.CorruptedDwgEntityException; |
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import org.gvsig.dwg.lib.DwgObject; |
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import org.gvsig.dwg.lib.DwgUtil; |
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import org.gvsig.dwg.lib.objects.DwgLwPolyline; |
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/**
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* @author alzabord
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*
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* TODO To change the template for this generated type comment go to Window -
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* Preferences - Java - Code Style - Code Templates
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*/
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public class DwgLwPolylineReader15 extends AbstractDwg15Reader { |
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/*
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*TODO El metodo original de J.Morell daba excepciones (que eran
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*ocultadas con un catch(Exception){}...BUF!
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*
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* Este metodo trata de copiar literalmente el de Python, para ver
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* si somos capaces de resolver el bug.
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*
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* */
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public void readSpecificObj(int[] data, int offset, DwgObject dwgObj) throws RuntimeException, CorruptedDwgEntityException { |
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if (!(dwgObj instanceof DwgLwPolyline)) |
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throw new RuntimeException( |
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"ArcReader 15 solo puede leer DwgLwPolyLine");
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DwgLwPolyline line = (DwgLwPolyline) dwgObj; |
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List val = null; |
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int bitPos = offset;
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bitPos = headTailReader.readObjectHeader(data, bitPos, dwgObj); |
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val = DwgUtil.getBitShort(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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int flag = ((Integer) val.get(1)).intValue(); |
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line.setFlag(flag); |
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/*
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* Flag son 4 bits que indican si la lwpline tiene ancho,
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* (3er bit), elevacion (4o bit), grosor (2? bit) y vector
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* de extrusion (1er bit).
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* 5? bit -> n? de bulges
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* 60 bit -> n? de widths
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*
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* ahora se verifican y se van leyendo
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* */
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double constWidth = 0d; |
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if( (flag & 0x4) > 0){ |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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constWidth = ((Double) val.get(1)).doubleValue(); |
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}//if
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line.setConstWidth(constWidth); |
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double elev = 0d; |
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if ( (flag & 0x8) > 0){ |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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elev = ((Double) val.get(1)).doubleValue(); |
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} |
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line.setElevation(elev); |
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double thickness = 0d; |
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if ( (flag & 0x2) > 0){ |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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thickness = ((Double) val.get(1)).doubleValue(); |
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} |
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line.setThickness(thickness); |
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double nx = 0d; |
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double ny = 0d; |
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double nz = 0d; |
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if( (flag & 0x1) > 0){ |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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nx = ((Double) val.get(1)).doubleValue(); |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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ny = ((Double) val.get(1)).doubleValue(); |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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nz = ((Double) val.get(1)).doubleValue(); |
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} |
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line.setNormal(new double[]{nx, ny, nz}); |
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val = DwgUtil.getBitLong(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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int numberOfPoints = ((Integer) val.get(1)).intValue(); |
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int numberOfBulges = 0; |
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if ((flag & 0x10) > 0){ |
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val = DwgUtil.getBitLong(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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numberOfBulges = ((Integer) val.get(1)).intValue(); |
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} |
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int numberOfWidths = 0; |
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if ((flag & 0x20) > 0){ |
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val = DwgUtil.getBitLong(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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numberOfWidths = ((Integer) val.get(1)).intValue(); |
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} |
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if(numberOfPoints > 0){ |
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//Esto es una chapuza, pero las LwPolylines no se est?n
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//leyendo bien y en ocasiones nos llegan entidades
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//con MILLONES de puntos (OutOfMemoryException)
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//Plantear en la lista de PythonCAD
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if(numberOfPoints > 10000) |
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throw new CorruptedDwgEntityException("LwPolyline corrupta"); |
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List vertices = new ArrayList(); |
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val = DwgUtil.getRawDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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double x0 = ((Double) val.get(1)).doubleValue(); |
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val = DwgUtil.getRawDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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double y0 = ((Double) val.get(1)).doubleValue(); |
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vertices.add(new double[]{x0, y0}); |
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/*
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* TODO azabala
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* Algunos metodos de DwgUtil lanzan excepciones inexperadas
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* cuando trabajan para rellenar clases de LwPolyline:
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* ->getDefaultDouble
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* ->getBits
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* etc
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*
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* Estas excepciones son del tipo OutOfBounds (se intenta leer un bit
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* cuyo orden excede de la capacidad del array)
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* La especificaci?n 15 de DWG es seguida al pie de la letra por Pythoncad,
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* (y por nosotros) as? que puede ser que el problema est? en los metodos
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* de DwgUtil.
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*
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* Intentar capturar la excepcion para que no se pierdan las entidades que las
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* provocan, y luego solucionar el error
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*
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*
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* */
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for (int i = 1; i < numberOfPoints; i++) { |
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val = DwgUtil.getDefaultDouble(data, bitPos, x0); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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double x = ((Double) val.get(1)).doubleValue(); |
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val = DwgUtil.getDefaultDouble(data, bitPos, y0); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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double y = ((Double) val.get(1)).doubleValue(); |
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vertices.add(new double[]{x, y}); |
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x0 = x;//se proporcionan como valores por defecto las coordenadas del pto anterior
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y0 = y; |
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} |
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line.setVertices(vertices); |
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}else{
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System.out.println("vertices == 0: lanzamos una excepcion??"); |
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} |
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if(numberOfBulges > 0){ |
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if (numberOfBulges != numberOfPoints){
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System.out.println("bulges != vertices: lanzamos una excepcion??"); |
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} |
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double[] bulges = new double[numberOfBulges]; |
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for(int i = 0; i < numberOfBulges; i++){ |
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//TODO OJOOOOOO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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//En PythonCAD se hacia getRawDouble, pero en la especificacion
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//(pagina 136) dice que es BitDouble (BD)
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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bulges[i] = ((Double) val.get(1)).doubleValue(); |
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} |
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line.setBulges(bulges); |
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}else{
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double[] bulges = new double[numberOfPoints]; |
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for(int i = 0; i < numberOfPoints; i++) |
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bulges[i] = 0d;
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line.setBulges(bulges); |
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} |
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if(numberOfWidths > 0){ |
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if (numberOfWidths != numberOfPoints){
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System.out.println("widths != vertices: lanzamos una excepcion??"); |
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} |
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double[][] widths = new double[numberOfWidths][2]; |
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for (int i = 0; i < numberOfWidths; i++) { |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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double sw = ((Double) val.get(1)).doubleValue(); |
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val = DwgUtil.getBitDouble(data, bitPos); |
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bitPos = ((Integer) val.get(0)).intValue(); |
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double ew = ((Double) val.get(1)).doubleValue(); |
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widths[i][0] = sw;
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widths[i][1] = ew;
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} |
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line.setWidths(widths); |
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}else{
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line.setWidths(new double[0][0]); |
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} |
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/*
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* azabala: de siempre se producen excepciones al tratar de leer
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* LwPolyline (si no se veian es pq se capturaban y no se sacaba
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* traza)
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*
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* Se producen siempre que numVertices == 0 ????
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* Probar a saltarmelos.
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*
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*
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*
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* TODO Ver por qu? aparecen (y lo peor, pq una vez se da una se propagan
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* todas)
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*
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* */
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bitPos = headTailReader.readObjectTailer(data, bitPos, line); |
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} |
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} |