package net.sf.openrocket.file.rocksim.importt;
import net.sf.openrocket.aerodynamics.WarningSet;
+import net.sf.openrocket.file.rocksim.RocksimCommonConstants;
+import net.sf.openrocket.file.rocksim.RocksimDensityType;
import net.sf.openrocket.file.simplesax.ElementHandler;
import net.sf.openrocket.file.simplesax.PlainTextHandler;
import net.sf.openrocket.material.Material;
+import net.sf.openrocket.rocketcomponent.Coaxial;
import net.sf.openrocket.rocketcomponent.MassComponent;
+import net.sf.openrocket.rocketcomponent.MassObject;
import net.sf.openrocket.rocketcomponent.RocketComponent;
+import net.sf.openrocket.rocketcomponent.ShockCord;
import org.xml.sax.SAXException;
import java.util.HashMap;
/**
* A SAX handler for Rocksim's MassObject XML type.
*/
-class MassObjectHandler extends PositionDependentHandler<MassComponent> {
+class MassObjectHandler extends PositionDependentHandler<MassObject> {
- /**
+ /**
* The Rocksim Mass length fudge factor. Rocksim completely exaggerates the length of a mass object to the point
* that it looks ridiculous in OpenRocket. This fudge factor is here merely to get the typical mass object to
- * render in the OpenRocket UI with it's bounds mostly inside it's parent. The odd thing about it is that
- * Rocksim does not expose the length of a mass object in the UI and actually treats mass objects as point objects -
- * not 3 or even 2 dimensional.
+ * render in the OpenRocket UI with it's bounds mostly inside it's parent. The odd thing about it is that Rocksim
+ * does not expose the length of a mass object in the UI and actually treats mass objects as point objects - not 3
+ * or even 2 dimensional.
*/
public static final int MASS_LEN_FUDGE_FACTOR = 100;
private final MassComponent mass;
/**
- * Constructor.
- *l
- * @param c the parent component
- * @param warnings the warning set
- *
- * @throws IllegalArgumentException thrown if <code>c</code> is null
+ * Reference to answer for getComponent().
+ */
+ private MassObject current;
+
+ /**
+ * Parent.
+ */
+ private RocketComponent parent;
+
+ /**
+ * 0 == General, 1 == Shock Cord
+ */
+ private int typeCode = 0;
+
+ /**
+ * Constructor. l
+ *
+ * @param c the parent component
+ * @param warnings the warning set
+ *
+ * @throws IllegalArgumentException thrown if <code>c</code> is null
*/
public MassObjectHandler(RocketComponent c, WarningSet warnings) throws IllegalArgumentException {
if (c == null) {
throw new IllegalArgumentException("The parent component of a mass component may not be null.");
}
mass = new MassComponent();
- if (isCompatible(c, MassComponent.class, warnings)) {
- c.addChild(mass);
- }
+ current = mass;
+ parent = c;
}
@Override
throws SAXException {
super.closeElement(element, attributes, content, warnings);
try {
- if ("Len".equals(element)) {
- mass.setLength(Double.parseDouble(content) / (RocksimHandler.ROCKSIM_TO_OPENROCKET_LENGTH * MASS_LEN_FUDGE_FACTOR));
+ if (RocksimCommonConstants.LEN.equals(element)) {
+ mass.setLength(Double.parseDouble(content) / (RocksimCommonConstants.ROCKSIM_TO_OPENROCKET_LENGTH));
}
- if ("KnownMass".equals(element)) {
- mass.setComponentMass(Double.parseDouble(content) / RocksimHandler.ROCKSIM_TO_OPENROCKET_MASS);
+ if (RocksimCommonConstants.KNOWN_MASS.equals(element)) {
+ mass.setComponentMass(Double.parseDouble(content) / RocksimCommonConstants.ROCKSIM_TO_OPENROCKET_MASS);
}
- if ("KnownCG".equals(element)) {
+ if (RocksimCommonConstants.KNOWN_CG.equals(element)) {
//Setting the CG of the Mass Object to 0 is important because of the different ways that Rocksim and
//OpenRocket treat mass objects. Rocksim treats them as points (even though the data file contains a
//length) and because Rocksim sets the CG of the mass object to really be relative to the front of
//the parent. But that value is already assumed in the position and position value for the component.
//Thus it needs to be set to 0 to say that the mass object's CG is at the point of the mass object.
- super.setCG(0);
+ super.setCG(0);
+ }
+ if (RocksimCommonConstants.TYPE_CODE.equals(element)) {
+ typeCode = Integer.parseInt(content);
+ }
+ if (RocksimCommonConstants.MATERIAL.equals(element)) {
+ setMaterialName(content);
}
}
catch (NumberFormatException nfe) {
}
}
+ @Override
+ public void endHandler(String element, HashMap<String, String> attributes, String content, WarningSet warnings) throws
+ SAXException {
+ if (inferAsShockCord(typeCode, warnings)) { //Shock Cord
+ mapMassObjectAsShockCord(element, attributes, content, warnings);
+ }
+ else { // typeCode == 0 General Mass Object
+ if (isCompatible(parent, MassComponent.class, warnings)) {
+ parent.addChild(mass);
+ }
+ super.endHandler(element, attributes, content, warnings);
+ }
+ }
+
+ /**
+ * Rocksim does not have a separate entity for Shock Cords. It has to be inferred. Sometimes the typeCode
+ * indicates it's a shock cord, but most times it does not. This is due to bugs in the Rocksim Component and
+ * Material databases. Try to infer a shock cord based on it's length and it's material type. It's somewhat
+ * arbitrary, but if the mass object's length is more than twice the length of it's parent component and it's a LINE
+ * material, then assume a shock cord.
+ *
+ * @param theTypeCode the code from the RKT XML file
+ *
+ * @return true if we think it's a shock cord
+ */
+ private boolean inferAsShockCord(int theTypeCode, WarningSet warnings) {
+ return (theTypeCode == 1 || (mass.getLength() >= 2 * parent.getLength() && RocksimDensityType.ROCKSIM_LINE
+ .equals(getDensityType()))) && isCompatible(parent, ShockCord.class, warnings, true);
+ }
+
+ /**
+ * If it appears that the mass object is a shock cord, then create an OR shock cord instance.
+ *
+ * @param element the element name
+ * @param attributes the attributes
+ * @param content the content of the element
+ * @param warnings the warning set to store warnings in.
+ *
+ * @throws org.xml.sax.SAXException not thrown
+ */
+ private void mapMassObjectAsShockCord(final String element, final HashMap<String, String> attributes,
+ final String content, final WarningSet warnings) throws SAXException {
+ ShockCord cord = new ShockCord();
+ current = cord;
+ if (isCompatible(parent, ShockCord.class, warnings)) {
+ parent.addChild(cord);
+ }
+ super.endHandler(element, attributes, content, warnings);
+ cord.setName(mass.getName());
+
+ setOverride(cord, mass.isMassOverridden(), mass.getOverrideMass(), mass.getOverrideCGX());
+
+ cord.setRadialDirection(mass.getRadialDirection());
+ cord.setRadialPosition(mass.getRadialPosition());
+ cord.setRadius(mass.getRadius());
+
+ //Rocksim does not distinguish between total length of the cord and the packed length. Fudge the
+ //packed length and set the real length.
+ cord.setCordLength(mass.getLength());
+ cord.setLength(cord.getCordLength() / MASS_LEN_FUDGE_FACTOR);
+ if (parent instanceof Coaxial) {
+ Coaxial parentCoaxial = (Coaxial) parent;
+ cord.setRadius(parentCoaxial.getInnerRadius());
+ }
+ }
+
/**
- * Get the component this handler is working upon.
+ * Get the component this handler is working upon. This changes depending upon the type of mass object.
*
* @return a component
*/
@Override
- public MassComponent getComponent() {
- return mass;
+ public MassObject getComponent() {
+ return current;
}
/**
* @param position the OpenRocket position
*/
public void setRelativePosition(RocketComponent.Position position) {
- mass.setRelativePosition(position);
+ current.setRelativePosition(position);
}
/**
- * Get the required type of material for this component. Does not apply to MassComponents.
+ * Get the required type of material for this component. Does not apply to MassComponents, but does apply to Shock
+ * Cords.
*
- * @return BULK
+ * @return LINE
*/
@Override
public Material.Type getMaterialType() {
- return Material.Type.BULK;
+ return Material.Type.LINE;
}
}
projects / debian / openrocket / blobdiff