Package org.gephi.layout.plugin.force

Examples of org.gephi.layout.plugin.force.ForceVector

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    class TestForce extends AbstractForce {

        @Override
        public ForceVector calculateForce(Spatial node1, Spatial node2, float distance) {
            return new ForceVector(1, 1);
        }
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        }
        graph = graphModel.getHierarchicalGraphVisible();
        energy = Float.POSITIVE_INFINITY;
        for (Node n : graph.getNodes()) {
            NodeData data = n.getNodeData();
            data.setLayoutData(new ForceVector());
        }
        progress = 0;
        setConverged(false);
        setStep(initialStep);
    }
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        graph = graphModel.getHierarchicalGraphVisible();
        graph.readLock();
        Node[] nodes = graph.getNodes().toArray();
        for (Node n : nodes) {
            if (n.getNodeData().getLayoutData() == null || !(n.getNodeData().getLayoutData() instanceof ForceVector)) {
                n.getNodeData().setLayoutData(new ForceVector());
            }
        }

        // Evaluates n^2 inter node forces using BarnesHut.
        QuadTree tree = QuadTree.buildTree(graph, getQuadTreeMaxLevel());

//        double electricEnergy = 0; ///////////////////////
//        double springEnergy = 0; ///////////////////////
        BarnesHut barnes = new BarnesHut(getNodeForce());
        barnes.setTheta(getBarnesHutTheta());
        for (Node node : nodes) {
            NodeData data = node.getNodeData();
            ForceVector layoutData = data.getLayoutData();

            ForceVector f = barnes.calculateForce(data, tree);
            layoutData.add(f);
//            electricEnergy += f.getEnergy();
        }

        // Apply edge forces.

        for (Edge e : graph.getEdgesAndMetaEdges()) {
            if (!e.getSource().equals(e.getTarget())) {
                NodeData n1 = e.getSource().getNodeData();
                NodeData n2 = e.getTarget().getNodeData();
                ForceVector f1 = n1.getLayoutData();
                ForceVector f2 = n2.getLayoutData();

                ForceVector f = getEdgeForce().calculateForce(n1, n2);
                f1.add(f);
                f2.subtract(f);
            }
        }

        // Calculate energy and max force.
        energy0 = energy;
        energy = 0;
        double maxForce = 1;
        for (Node n : nodes) {
            NodeData data = n.getNodeData();
            ForceVector force = data.getLayoutData();

            energy += force.getNorm();
            maxForce = Math.max(maxForce, force.getNorm());
        }

        // Apply displacements on nodes.
        for (Node n : nodes) {
            NodeData data = n.getNodeData();
            if (!data.isFixed()) {
                ForceVector force = data.getLayoutData();

                force.multiply((float) (1.0 / maxForce));
                getDisplacement().moveNode(data, force);
            }
        }
        postAlgo();
//        springEnergy = energy - electricEnergy;
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        }

        @Override
        public ForceVector calculateForce(Spatial node1, Spatial node2,
                float distance) {
            ForceVector f = new ForceVector(node2.x() - node1.x(),
                    node2.y() - node1.y());
            f.multiply(distance / optimalDistance);
            return f;
        }
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        }

        @Override
        public ForceVector calculateForce(Spatial node1, Spatial node2,
                float distance) {
            ForceVector f = new ForceVector(node2.x() - node1.x(),
                    node2.y() - node1.y());
            float scale = -relativeStrength * optimalDistance * optimalDistance / (distance * distance);
            if (Float.isNaN(scale) || Float.isInfinite(scale)) {
                scale = -1;
            }

            f.multiply(scale);
            return f;
        }
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            }
            return force.calculateForce(node, tree);
        }

        if (distance * theta > tree.size()) {
            ForceVector f = force.calculateForce(node, tree, distance);
            f.multiply(tree.mass());
            return f;
        }

        ForceVector f = new ForceVector();
        for (QuadTree child : tree.getChildren()) {
            f.add(calculateForce(node, child));
        }
        return f;
    }
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    public void testLeafTree() {
        QuadTree tree = new QuadTree(0, 0, 10, 10);
        tree.addNode(new TestNode(1, 1));
        BarnesHut barnesHut = new BarnesHut(new TestForce());

        ForceVector f = barnesHut.calculateForce(tree, tree);
        assertNotNull(f);
        assertEquals(f.x(), 1, eps);
        assertEquals(f.y(), 1, eps);
    }
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            }
            return force.calculateForce(node, tree);
        }

        if (distance * theta > tree.size()) {
            ForceVector f = force.calculateForce(node, tree, distance);
            f.multiply(tree.mass());
            return f;
        }

        ForceVector f = new ForceVector();
        for (QuadTree child : tree.getChildren()) {
            f.add(calculateForce(node, child));
        }
        return f;
    }
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            return;
        }
        graph = graphModel.getGraphVisible();
        energy = Float.POSITIVE_INFINITY;
        for (Node n : graph.getNodes()) {
            n.setLayoutData(new ForceVector());
        }
        progress = 0;
        setConverged(false);
        setStep(initialStep);
    }
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        graph = graphModel.getGraphVisible();
        graph.readLock();
        Node[] nodes = graph.getNodes().toArray();
        for (Node n : nodes) {
            if (n.getLayoutData() == null || !(n.getLayoutData() instanceof ForceVector)) {
                n.setLayoutData(new ForceVector());
            }
        }

        // Evaluates n^2 inter node forces using BarnesHut.
        QuadTree tree = QuadTree.buildTree(graph, getQuadTreeMaxLevel());

//        double electricEnergy = 0; ///////////////////////
//        double springEnergy = 0; ///////////////////////
        BarnesHut barnes = new BarnesHut(getNodeForce());
        barnes.setTheta(getBarnesHutTheta());
        for (Node node : nodes) {
            ForceVector layoutData = node.getLayoutData();

            ForceVector f = barnes.calculateForce(node, tree);
            layoutData.add(f);
//            electricEnergy += f.getEnergy();
        }

        // Apply edge forces.

        for (Edge e : graph.getEdges()) {
            if (!e.getSource().equals(e.getTarget())) {
                Node n1 = e.getSource();
                Node n2 = e.getTarget();
                ForceVector f1 = n1.getLayoutData();
                ForceVector f2 = n2.getLayoutData();

                ForceVector f = getEdgeForce().calculateForce(n1, n2);
                f1.add(f);
                f2.subtract(f);
            }
        }

        // Calculate energy and max force.
        energy0 = energy;
        energy = 0;
        double maxForce = 1;
        for (Node n : nodes) {
            ForceVector force = n.getLayoutData();

            energy += force.getNorm();
            maxForce = Math.max(maxForce, force.getNorm());
        }

        // Apply displacements on nodes.
        for (Node n : nodes) {
            if (!n.isFixed()) {
                ForceVector force = n.getLayoutData();

                force.multiply((float) (1.0 / maxForce));
                getDisplacement().moveNode(n, force);
            }
        }
        postAlgo();
//        springEnergy = energy - electricEnergy;
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Related Classes of org.gephi.layout.plugin.force.ForceVector

  • org.gephi.layout.plugin.force.quadtree.BarnesHut
  • org.gephi.layout.plugin.force.yifanHu.YifanHuLayout
  • org.gephi.layout.plugin.force.yifanHu.YifanHuLayout$ElectricalForce
  • org.gephi.layout.plugin.force.yifanHu.YifanHuLayout$SpringForce
  • org.gephi.layout.plugin.quadtree.BarnesHutTest
  • org.gephi.layout.plugin.quadtree.BarnesHutTest$TestForce
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