rs_modification.cpp

qcad2.05可用于windows和linux的源码

        if (e->isAtomic()) {
            RS_AtomicEntity* ae = (RS_AtomicEntity*)e;
            double bulge = 0.0;
            if (ae->rtti()==RS2::EntityArc) {
                RS_DEBUG->print("RS_Modification::deletePolylineNode: arc segment");
                bulge = ((RS_Arc*)ae)->getBulge();
            } else {
                RS_DEBUG->print("RS_Modification::deletePolylineNode: line segment");
                bulge = 0.0;
            }

            // last entity is closing entity and will be added below with endPolyline()
            if (e==lastEntity && polyline.isClosed()) {
                continue;
            }

            // first vertex (startpoint)
            if (first && node.distanceTo(ae->getStartpoint())>1.0e-6) {
                RS_DEBUG->print("RS_Modification::deletePolylineNode: first node: %f/%f",
                                ae->getStartpoint().x, ae->getStartpoint().y);

                newPolyline->setNextBulge(bulge);
                newPolyline->addVertex(ae->getStartpoint());
                first = false;
            }

            // normal node (not deleted):
            if (first==false && node.distanceTo(ae->getEndpoint())>1.0e-6) {
                RS_DEBUG->print("RS_Modification::deletePolylineNode: normal vertex found: %f/%f",
                                ae->getEndpoint().x, ae->getEndpoint().y);
                if (lastDropped) {
                    //bulge = 0.0;
                }
                newPolyline->setNextBulge(bulge);
                newPolyline->addVertex(ae->getEndpoint());
                lastDropped = false;
            }

            // drop deleted node:
            else {
                RS_DEBUG->print("RS_Modification::deletePolylineNode: deleting vertex: %f/%f",
                                ae->getEndpoint().x, ae->getEndpoint().y);
                lastDropped = true;
            }
        } else {
            RS_DEBUG->print("RS_Modification::deletePolylineNode: "
                            "Polyline contains non-atomic entities",
                            RS_Debug::D_WARNING);
        }
    }

    RS_DEBUG->print("RS_Modification::deletePolylineNode: ending polyline");
    newPolyline->setNextBulge(polyline.getClosingBulge());
    newPolyline->endPolyline();

    //if (newPolyline->count()==1) {
    //}

    // add new polyline:
    RS_DEBUG->print("RS_Modification::deletePolylineNode: adding new polyline");
    container->addEntity(newPolyline);
    if (graphicView!=NULL) {
        graphicView->deleteEntity(&polyline);
        graphicView->drawEntity(newPolyline);
    }

    RS_DEBUG->print("RS_Modification::deletePolylineNode: handling undo");
    if (document!=NULL && handleUndo) {
        document->startUndoCycle();

        polyline.setUndoState(true);
        document->addUndoable(&polyline);
        document->addUndoable(newPolyline);

        document->endUndoCycle();
    }

    return newPolyline;
}
*/



/**
 * Deletes all nodes between the two given nodes (exclusive).
 *
 * @param node1 First limiting node. 
 * @param node2 Second limiting node. 
 *
 * @return Pointer to the new polyline or NULL.
 */
/*
RS_Polyline* RS_Modification::deletePolylineNodesBetween(RS_Polyline& polyline,
        RS_AtomicEntity& segment, const RS_Vector& node1, const RS_Vector& node2) {

    RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween");

    if (container==NULL) {
        RS_DEBUG->print("RS_Modification::addPolylineNodesBetween: no valid container",
                        RS_Debug::D_WARNING);
        return NULL;
    }

    if (node1.valid==false || node2.valid==false) {
        RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                        "node not valid",
                        RS_Debug::D_WARNING);
        return NULL;
    }

    if (node1.distanceTo(node2)<1.0e-6) {
        RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                        "nodes are identical",
                        RS_Debug::D_WARNING);
        return NULL;
    }

    // check if there's nothing to delete:
    for (RS_Entity* e=polyline.firstEntity(); e!=NULL;
            e=polyline.nextEntity()) {

        if (e->isAtomic()) {
            RS_AtomicEntity* ae = (RS_AtomicEntity*)e;

            if ((node1.distanceTo(ae->getStartpoint())<1.0e-6 &&
                    node2.distanceTo(ae->getEndpoint())<1.0e-6) ||
                    (node2.distanceTo(ae->getStartpoint())<1.0e-6 &&
                     node1.distanceTo(ae->getEndpoint())<1.0e-6)) {

                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                                "nothing to delete",
                                RS_Debug::D_WARNING);
                return NULL;
            }
        }
    }


    // check if the start point is involved:
    bool startpointInvolved = false;
    if (node1.distanceTo(polyline.getStartpoint())<1.0e-6 ||
            node2.distanceTo(polyline.getStartpoint())<1.0e-6) {
        startpointInvolved = true;
    }


    // check which part of the polyline has to be deleted:
    bool deleteStart = false;
    if (polyline.isClosed()) {
        bool found = false;
        double length1 = 0.0;
        double length2 = 0.0;
        RS_Entity* e=polyline.firstEntity();

        if (startpointInvolved) {
            if (e->isAtomic()) {
                RS_AtomicEntity* ae = (RS_AtomicEntity*)e;
            	length1+=ae->getLength();
			}
            e = polyline.nextEntity();
        }
        for (; e!=NULL; e=polyline.nextEntity()) {

            if (e->isAtomic()) {
                RS_AtomicEntity* ae = (RS_AtomicEntity*)e;

                if (node1.distanceTo(ae->getStartpoint())<1.0e-6 ||
                        node2.distanceTo(ae->getStartpoint())<1.0e-6) {

                    found = !found;
                }

                if (found) {
                    length2+=ae->getLength();
                } else {
                    length1+=ae->getLength();
                }
            }
        }
        if (length1<length2) {
            deleteStart = true;
        } else {
            deleteStart = false;
        }
    }

    RS_Polyline* newPolyline = new RS_Polyline(container);
    newPolyline->setClosed(polyline.isClosed());
    newPolyline->setSelected(polyline.isSelected());
    newPolyline->setLayer(polyline.getLayer());
    newPolyline->setPen(polyline.getPen());

    if (startpointInvolved && deleteStart && polyline.isClosed()) {
        newPolyline->setNextBulge(0.0);
        newPolyline->addVertex(polyline.getStartpoint());
    }

    // copy polyline and drop deleted nodes:
    bool first = true;
    bool removing = deleteStart;
    bool done = false;
    bool nextIsStraight = false;
    RS_Entity* lastEntity = polyline.lastEntity();
    int i=0;
    double bulge = 0.0;
    for (RS_Entity* e=polyline.firstEntity(); e!=NULL;
            e=polyline.nextEntity()) {

        RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: entity: %d", i++);
        RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: removing: %d", (int)removing);

        if (e->isAtomic()) {
            RS_AtomicEntity* ae = (RS_AtomicEntity*)e;
            if (ae->rtti()==RS2::EntityArc) {
                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: arc segment");
                bulge = ((RS_Arc*)ae)->getBulge();
            } else {
                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: line segment");
                bulge = 0.0;
            }

            // last entity is closing entity and will be added below with endPolyline()
            if (e==lastEntity && polyline.isClosed()) {
                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                                "dropping last vertex of closed polyline");
                continue;
            }

            // first vertex (startpoint)
            if (first) {
                if (!removing) {
                    RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: first node: %f/%f",
                                    ae->getStartpoint().x, ae->getStartpoint().y);
                    newPolyline->setNextBulge(bulge);
                    newPolyline->addVertex(ae->getStartpoint());
                    first = false;
                }
            }

            // stop removing nodes:
            if (removing==true &&
                    (node1.distanceTo(ae->getEndpoint())<1.0e-6 ||
                     node2.distanceTo(ae->getEndpoint())<1.0e-6)) {
                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                                "stop removing at: %f/%f",
                                ae->getEndpoint().x, ae->getEndpoint().y);
                removing = false;
                done = true;
				if (first==false) {
                	nextIsStraight = true;
				}
            }

            // normal node (not deleted):
            if (removing==false && (done==false || deleteStart==false)) {
                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                                "normal vertex found: %f/%f",
                                ae->getEndpoint().x, ae->getEndpoint().y);
                if (nextIsStraight) {
                    bulge = 0.0;
                    nextIsStraight = false;
                }
                newPolyline->setNextBulge(bulge);
                newPolyline->addVertex(ae->getEndpoint());
            }

            // drop deleted node:
            else {
                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                                "deleting vertex: %f/%f",
                                ae->getEndpoint().x, ae->getEndpoint().y);
            }

            // start to remove nodes from now on:
            if (done==false && removing==false &&
                    (node1.distanceTo(ae->getEndpoint())<1.0e-6 ||
                     node2.distanceTo(ae->getEndpoint())<1.0e-6)) {
                RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                                "start removing at: %f/%f",
                                ae->getEndpoint().x, ae->getEndpoint().y);
                removing = true;
            }

            if (done) {
                done=false;
            }
        } else {
            RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: "
                            "Polyline contains non-atomic entities",
                            RS_Debug::D_WARNING);
        }
    }

    RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: ending polyline");
    newPolyline->setNextBulge(polyline.getClosingBulge());
    newPolyline->endPolyline();

    // add new polyline:
    RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: adding new polyline");
    container->addEntity(newPolyline);
    if (graphicView!=NULL) {
        graphicView->deleteEntity(&polyline);
        graphicView->drawEntity(newPolyline);
    }

    RS_DEBUG->print("RS_Modification::deletePolylineNodesBetween: handling undo");
    if (document!=NULL && handleUndo) {
        document->startUndoCycle();

        polyline.setUndoState(true);
        document->addUndoable(&polyline);
        document->addUndoable(newPolyline);

        document->endUndoCycle();
    }

    return newPolyline;
}
*/



/**
 * Trims two segments of a polyline all nodes between the two trim segments
 * are removed.
 *
 * @param polyline The polyline entity.
 * @param segment1 First segment to trim.
 * @param segment2 Second segment to trim.
 *
 * @return Pointer to the new polyline or NULL.
 */
/*
RS_Polyline* RS_Modification::polylineTrim(RS_Polyline& polyline,
        RS_AtomicEntity& segment1,
        RS_AtomicEntity& segment2) {

    RS_DEBUG->print("RS_Modification::polylineTrim");

    if (container==NULL) {
        RS_DEBUG->print("RS_Modification::addPolylineNodesBetween: no valid container",
                        RS_Debug::D_WARNING);
        return NULL;
    }

    if (segment1.getParent()!=&polyline || segment2.getParent()!=&polyline) {
        RS_DEBUG->print("RS_Modification::polylineTrim: "
                        "segments not in polyline",
                        RS_Debug::D_WARNING);
        return NULL;
    }

    if (&segment1==&segment2) {
        RS_DEBUG->print("RS_Modification::polylineTrim: "
                        "segments are identical",
                        RS_Debug::D_WARNING);
        return NULL;
    }

    RS_VectorSolutions sol;
    sol = RS_Information::getIntersection(&segment1, &segment2, false);

    if (sol.getNumber()==0) {
        RS_DEBUG->print("RS_Modification::polylineTrim: "
                        "segments cannot be trimmed",
                        RS_Debug::D_WARNING);
        return NULL;
    }

    // check which segment comes first in the polyline:
    RS_AtomicEntity* firstSegment;
    if (polyline.findEntity(&segment1) > polyline.findEntity(&segment2)) {
        firstSegment = &segment2;
    } else {
        firstSegment = &segment1;
    }

    // find out if we need to trim towards the open part of the polyline
    bool reverseTrim;
    reverseTrim = !RS_Math::isSameDirection(firstSegment->getDirection1(),
                                            firstSegment->getStartpoint().angleTo(sol.get(0)), M_PI/2.0);
    //reverseTrim = reverseTrim || !RS_Math::isSameDirection(segment2.getDirection1(),
    //	segment2.getStartpoint().angleTo(sol.get(0)), M_PI/2.0);

    RS_Polyline* newPolyline = new RS_Polyline(container);
    newPolyline->setClosed(polyline.isClosed());
    newPolyline->setSelected(polyline.isSelected());
    newPolyline->setLayer(polyline.getLayer());
    newPolyline->setPen(polyline.getPen());

    // normal trimming: start removing nodes at trim segment. ends stay the same
    if (reverseTrim==false) {
        // copy polyline, trim segments and drop between nodes:
        bool first = true;
        bool removing = false;
        bool nextIsStraight = false;
        RS_Entity* lastEntity = polyline.lastEntity();
        for (RS_Entity* e=polyline.firstEntity(); e!=NULL;
                e=polyline.nextEntity()) {

            if (e->isAtomic()) {
                RS_AtomicEntity* ae = (RS_AtomicEntity*)e;
                double bulge = 0.0;
                if (ae->rtti()==RS2::EntityArc) {
                    RS_DEBUG->print("RS_Modification::polylineTrim: arc segment");
                    bulge = ((RS_Arc*)ae)->getBulge();
                } else {
                    RS_DEBUG->print("RS_Modification::polylineTrim: line segment");
                    bulge = 0.0;
                }