svn-gvsig-desktop / branches / v02_desarrollo / libraries / libCq CMS for java.old / src / org / cresques / px / dxf / DxfCalArcs.java @ 1607
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package org.cresques.px.dxf; |
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import java.awt.geom.Point2D; |
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import java.util.Vector; |
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/**
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* Calcula puntos sobre un arco.
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* @author jmorell
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*
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* TODO To change the template for this generated type comment go to
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* Window - Preferences - Java - Code Style - Code Templates
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*/
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public class DxfCalArcs { |
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final boolean debug = true; |
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Point2D coord1, coord2;
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Point2D center;
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double radio, empieza, acaba;
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double bulge;
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double d, dd, aci;
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Point2D coordAux;
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//private Point2D centralPoint;
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public DxfCalArcs(Point2D p1, Point2D p2, double bulge) { |
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this.bulge = bulge;
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/*System.out.println("DxfCalArcs: p1 = " + p1);
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System.out.println("DxfCalArcs: p2 = " + p2);
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System.out.println("DxfCalArcs: bulge = " + bulge);*/
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if (bulge < 0.0) { |
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coord1 = p2; |
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coord2 = p1; |
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//System.out.println("DxfCalArcs: Bulge negativo; coord1 = " + coord1 + ", coord2 = " + coord2);
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} else {
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coord1 = p1; |
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coord2 = p2; |
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} |
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calculate(); |
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} |
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DxfCalArcs calculate() {
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d = Math.sqrt((coord2.getX()-coord1.getX())*(coord2.getX()-coord1.getX()) + (coord2.getY()-coord1.getY())*(coord2.getY()-coord1.getY()));
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//System.out.println("DxfCalArcs: distancia reducida = " + d);
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coordAux = new Point2D.Double((coord1.getX()+coord2.getX())/2.0, (coord1.getY()+coord2.getY())/2.0); |
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//System.out.println("DxfCalArcs: punto medio = " + coordAux);
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double b = Math.abs(bulge); |
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//System.out.println("DxfCalArcs: Bulge(valor absoluto) = " + b);
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double beta = Math.atan(b); |
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//System.out.println("DxfCalArcs: Angulo beta(rad) = " + beta);
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//double beta = Math.atan(bulge);
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double alfa = beta*4.0; |
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//System.out.println("DxfCalArcs: Angulo alfa(rad)(angulo que define el arco) = " + alfa);
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double landa = alfa/2.0; |
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//System.out.println("DxfCalArcs: Angulo landa(rad) = " + landa);
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dd = (d/2.0)/(Math.tan(landa)); |
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radio = (d/2.0)/(Math.sin(landa)); |
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//System.out.println("DxfCalArcs: radio del arco = " + radio);
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aci = Math.atan((coord2.getX()-coord1.getX())/(coord2.getY()-coord1.getY()));
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//System.out.println("DxfCalArcs: Acimut de coord1(pto origen) a coord2(pto final) = " + aci);
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double aciDegree = aci*180.0/Math.PI; |
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//System.out.println("DxfCalArcs: Acimut en grados = " + aciDegree);
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if (coord2.getY() > coord1.getY()) {
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aci += Math.PI;
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//System.out.println("DxfCalArcs: La coord Y de coord2 es mayor que la");
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//System.out.println("DxfCalArcs: coord Y de coord1, acimut = acimut + PI, nuevo acimut = " + aci);
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aciDegree = aci*180.0/Math.PI; |
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//System.out.println("DxfCalArcs: Nuevo acimut en grados = " + aciDegree);
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} |
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center = new Point2D.Double(coordAux.getX() + dd*Math.sin(aci+(Math.PI/2.0)), coordAux.getY() + dd*Math.cos(aci+(Math.PI/2.0))); |
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//System.out.println("DxfCalArcs: El centro del arco es: centro = " + center);
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calculateEA(alfa); |
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return this; |
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} |
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void calculateEA(double alfa){ |
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empieza = Math.atan2(coord1.getY()-center.getY(), coord1.getX()-center.getX());
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acaba = (empieza + alfa); |
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empieza = empieza*180.0/Math.PI; |
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acaba = acaba*180.0/Math.PI; |
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//System.out.println("DxfCalArcs: Acimut de inicio = " + empieza + ", Acimut de finalizacion = " + acaba);
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//System.out.println("Tener en cuenta que los angulos se miden en sentido antihorario.");
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} |
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public Vector getPoints(double inc) { |
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//System.out.println("Se incia el metodo que construye el arco.");
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//System.out.println("Todo el proceso anterior define los parametros para esta construccion.");
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Vector arc = new Vector(); |
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double angulo;
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int iempieza = (int) empieza + 1; // ojo aqui !! |
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int iacaba = (int) acaba; |
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//System.out.println("DxfCalArcs: Angulo entero de inicio: iempieza = " + iempieza + ", Angulo entero de finalizacion: iacaba = " + iacaba);
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if (empieza <= acaba) {
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//System.out.println("El angulo de inicio es menor que el angulo de finalizacion.");
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addNode(arc, empieza); |
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for (angulo = iempieza; angulo <= iacaba; angulo += inc) {
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addNode(arc, angulo); |
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} |
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addNode(arc, acaba); |
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} else {
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//System.out.println("El angulo de inicio es mayor que el angulo de finalizacion.");
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addNode(arc, empieza); |
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for (angulo = iempieza ; angulo <= 360; angulo += inc) { |
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addNode(arc, angulo); |
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} |
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for (angulo = 1; angulo <= iacaba; angulo += inc) { |
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addNode(arc, angulo); |
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} |
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addNode(arc, angulo); |
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} |
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Point2D aux = (Point2D)arc.get(arc.size()-1); |
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double aux1 = Math.abs(aux.getX()-coord2.getX()); |
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double aux2 = Math.abs(aux.getY()-coord2.getY()); |
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/*if (aux1<=0.000005 && aux2<=0.000005) {
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arc.remove(arc.size()-1);
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arc.remove(arc.size()-1);
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arc.add(coord2);
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}*/
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return arc;
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} |
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/**
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* 050301, jmorell: M?todo para obtener el punto central del arco.
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* @return
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*/
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public Vector getCentralPoint() { |
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Vector arc = new Vector(); |
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if (empieza <= acaba) {
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addNode(arc, (empieza+acaba)/2.0);
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} else {
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addNode(arc, empieza); |
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double alfa = 360-empieza; |
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double beta = acaba;
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double an = alfa + beta;
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double mid = an/2.0; |
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if (mid<=alfa) {
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addNode(arc, empieza+mid); |
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} else {
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addNode(arc, mid-alfa); |
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} |
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} |
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return arc;
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} |
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private void addNode(Vector arc, double angulo) { |
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double yy = center.getY() + radio * Math.sin(angulo*Math.PI/180.0); |
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double xx = center.getX() + radio * Math.cos(angulo*Math.PI/180.0); |
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arc.add(new Point2D.Double(xx,yy)); |
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//System.out.println("DxfCalArcs: A?ade el punto " + new Point2D.Double(xx,yy) + ", correspondiente al angulo " + angulo);
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} |
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} |