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;
*/
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 int typeCode = 0;
/**
- * Constructor.
- *l
- * @param c the parent component
- * @param warnings the warning set
- *
- * @throws IllegalArgumentException thrown if <code>c</code> is null
+ * 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) {
//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);
}
@Override
- public void endHandler(String element, HashMap<String, String> attributes, String content, WarningSet warnings) throws SAXException {
- if (typeCode == 0) { //General Mass Object
+ 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);
}
- else if (typeCode == 1) { //Shock Cord
- 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 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);
+ }
- //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 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 required type of material for this component. Does not apply to MassComponents, but does apply to Shock Cords.
+ * Get the required type of material for this component. Does not apply to MassComponents, but does apply to Shock
+ * Cords.
*
* @return LINE
*/
projects / debian / openrocket / blobdiff