Examples of NodeItem

org.gephi.preview.plugin.items.NodeItem
@author Mathieu Bastian
prefuse.visual.NodeItem
rg">jeffrey heer

Examples of prefuse.visual.NodeItem

    }
    
    private Iterator sortedChildren(final NodeItem n) {
        double base = 0;
        // update base angle for node ordering
        NodeItem p = (NodeItem)n.getParent();
        if ( p != null ) {
            base = normalize(Math.atan2(p.getY()-n.getY(), p.getX()-n.getX()));
        }
        int cc = n.getChildCount();
        if ( cc == 0 ) return null;


        NodeItem c = (NodeItem)n.getFirstChild();
        
        // TODO: this is hacky and will break when filtering
        // how to know that a branch is newly expanded?
        // is there an alternative property we should check?
        if ( !c.isStartVisible() ) {
            // use natural ordering for previously invisible nodes
            return n.children();
        }
        
        double angle[] = new double[cc];
        final int idx[] = new int[cc];
        for ( int i=0; i<cc; ++i, c=(NodeItem)c.getNextSibling() ) {
            idx[i] = i;
            angle[i] = normalize(-base +
                Math.atan2(c.getY()-n.getY(), c.getX()-n.getX()));
        }
        ArrayLib.sort(angle, idx);
        
        // return iterator over sorted children
        return new Iterator() {

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Examples of prefuse.visual.NodeItem

        double width = ((Params)n.get(PARAMS)).width;
        double cfrac, nfrac = 0.0;
        
        Iterator childIter = sortedChildren(n);
        while ( childIter != null && childIter.hasNext() ) {
            NodeItem c = (NodeItem)childIter.next();
            Params cp = (Params)c.get(PARAMS);
            cfrac = cp.width / width;
            if ( c.isExpanded() && c.getChildCount()>0 ) {
                layout(c, r+m_radiusInc, theta1 + nfrac*dtheta, 
                                         theta1 + (nfrac+cfrac)*dtheta);
            }
            setPolarLocation(c, n, r, theta1 + nfrac*dtheta + cfrac*dtheta2);
            cp.angle = cfrac*dtheta;

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Examples of prefuse.visual.NodeItem


        for (int curIter=0; curIter < maxIter; curIter++ ) {


            // Calculate repulsion
            for (Iterator iter = g.nodes(); iter.hasNext();) {
                NodeItem n = (NodeItem)iter.next();
                if (n.isFixed()) continue;
                calcRepulsion(g, n);
            }


            // Calculate attraction
            for (Iterator iter = g.edges(); iter.hasNext();) {
                EdgeItem e = (EdgeItem) iter.next();
                calcAttraction(e);
            }


            for (Iterator iter = g.nodes(); iter.hasNext();) {
                NodeItem n = (NodeItem)iter.next();
                if (n.isFixed()) continue;
                calcPositions(n,bounds);
            }


            cool(curIter);
        }

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Examples of prefuse.visual.NodeItem

        Iterator nodeIter = g.nodes();
        Random rand = new Random(42); // get a deterministic layout result
        double scaleW = ALPHA*b.getWidth()/2;
        double scaleH = ALPHA*b.getHeight()/2;
        while ( nodeIter.hasNext() ) {
            NodeItem n = (NodeItem)nodeIter.next();
            Params np = getParams(n);
            np.loc[0] = b.getCenterX() + rand.nextDouble()*scaleW;
            np.loc[1] = b.getCenterY() + rand.nextDouble()*scaleH;
        }
    }

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Examples of prefuse.visual.NodeItem

    }
    
    private void finish(Graph g) {
        Iterator nodeIter = g.nodes();
        while ( nodeIter.hasNext() ) {
            NodeItem n = (NodeItem)nodeIter.next();
            Params np = getParams(n);
            setX(n, null, np.loc[0]);
            setY(n, null, np.loc[1]);
        }
    }

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Examples of prefuse.visual.NodeItem

        np.loc[0] = x;
        np.loc[1] = y;
    }


    public void calcAttraction(EdgeItem e) {
        NodeItem n1 = e.getSourceItem();
        Params n1p = getParams(n1);
        NodeItem n2 = e.getTargetItem();
        Params n2p = getParams(n2);
        
        double xDelta = n1p.loc[0] - n2p.loc[0];
        double yDelta = n1p.loc[1] - n2p.loc[1];

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Examples of prefuse.visual.NodeItem

    public void calcRepulsion(Graph g, NodeItem n1) {
        Params np = getParams(n1);
        np.disp[0] = 0.0; np.disp[1] = 0.0;


        for (Iterator iter2 = g.nodes(); iter2.hasNext();) {
            NodeItem n2 = (NodeItem) iter2.next();
            Params n2p = getParams(n2);
            if (n2.isFixed()) continue;
            if (n1 != n2) {
                double xDelta = np.loc[0] - n2p.loc[0];
                double yDelta = np.loc[1] - n2p.loc[1];


                double deltaLength = Math.max(EPSILON,

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Examples of prefuse.visual.NodeItem

    public void run(double frac) {
        Graph g = (Graph)m_vis.getGroup(m_group);
        initSchema(g.getNodes());
        
        Point2D anchor = getLayoutAnchor();
        NodeItem n = getLayoutRoot();
        layout(n,anchor.getX(),anchor.getY());
    }

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Examples of prefuse.visual.NodeItem

        Params np = getParams(n);
        np.d = 0;
        double s = 0;
        Iterator childIter = n.children();
        while ( childIter.hasNext() ) {
            NodeItem c = (NodeItem)childIter.next();
            if ( !c.isVisible() ) continue;
            firstWalk(c);
            Params cp = getParams(c);
            np.d = Math.max(np.d,cp.r);
            cp.a = Math.atan(((double)cp.r)/(np.d+cp.r));
            s += cp.a;

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Examples of prefuse.visual.NodeItem

        
        Params np = getParams(n);
        int numChildren = 0;
        Iterator childIter = n.children();
        while ( childIter.hasNext() ) {
            NodeItem c = (NodeItem)childIter.next();
            if ( c.isVisible() ) ++numChildren;
        }
        double dd = l*np.d;
        double p  = t + Math.PI;
        double fs = (numChildren==0 ? 0 : np.f/numChildren);
        double pr = 0;
        childIter = n.children();
        while ( childIter.hasNext() ) {
            NodeItem c = (NodeItem)childIter.next();
            if ( !c.isVisible() ) continue;
            Params cp = getParams(c);
            double aa = np.c * cp.a;
            double rr = np.d * Math.tan(aa)/(1-Math.tan(aa));
            p += pr + aa + fs;
            double xx = (l*rr+dd)*Math.cos(p);

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