Examples with FemElement artisynth.core.femmodels.FemElement used on opensource projects

Example 1 with FemElement

use of artisynth.core.femmodels.FemElement in project artisynth_core by artisynth.

the class FemBeamMech method build.

public void build(String[] args) {
    femPath = "models/mech/models/fem/";
    modPath = "models/mech/";
    int nn = 2;
    myFemMod = FemFactory.createTetGrid(null, 0.6, 0.2, 0.2, nn * 3, nn * 1, nn * 1);
    myFemMod.setName("fem");
    myFemMod.setDensity(myDensity);
    myFemMod.setBounds(new Point3d(-0.6, 0, 0), new Point3d(0.6, 0, 0));
    myFemMod.setLinearMaterial(60000, 0.33, true);
    myFemMod.setStiffnessDamping(0.002);
    myFemMod.setImplicitIterations(100);
    myFemMod.setImplicitPrecision(0.001);
    myFemMod.setSurfaceRendering(SurfaceRender.Shaded);
    Renderable elems = myFemMod.getElements();
    RenderProps.setLineWidth(elems, 2);
    RenderProps.setLineColor(elems, Color.BLUE);
    Renderable nodes = myFemMod.getNodes();
    RenderProps.setPointStyle(nodes, Renderer.PointStyle.SPHERE);
    RenderProps.setPointRadius(nodes, 0.005);
    RenderProps.setPointColor(nodes, Color.GREEN);
    // fix the leftmost nodes
    double EPS = 1e-9;
    for (FemNode3d n : myFemMod.getNodes()) {
        if (n.getPosition().x < -0.3 + EPS) {
            myLeftNodes.add(n);
        }
    }
    System.out.println("fixed nodes:");
    for (FemNode3d n : myLeftNodes) {
        n.setDynamic(false);
    }
    RenderProps.setFaceColor(myFemMod, new Color(0.4f, 0.4f, 1.0f));
    myFemMod.setProfiling(true);
    RigidBody anchorBox = new RigidBody("anchorBox");
    PolygonalMesh mesh = MeshFactory.createBox(0.1, 0.3, 0.3);
    anchorBox.setMesh(mesh, /* fileName= */
    null);
    RigidTransform3d X = new RigidTransform3d();
    X.p.set(-0.35, 0, 0);
    anchorBox.setPose(X);
    anchorBox.setDynamic(false);
    myMechMod = new MechModel("mech");
    myMechMod.addModel(myFemMod);
    myMechMod.addRigidBody(anchorBox);
    System.out.println("models: " + myMechMod.findComponent("models"));
    System.out.println("models/fem: " + myMechMod.findComponent("models/fem"));
    myMechMod.setIntegrator(Integrator.BackwardEuler);
    addModel(myMechMod);
    myMechMod.setProfiling(true);
    // add marker to lower right corner element
    Point3d corner = new Point3d(0.3, -0.1, -0.1);
    FemElement cornerElem = null;
    for (FemElement e : myFemMod.getElements()) {
        FemNode[] nodeList = e.getNodes();
        for (int i = 0; i < nodeList.length; i++) {
            if (nodeList[i].getPosition().epsilonEquals(corner, 1e-8)) {
                cornerElem = e;
                break;
            }
        }
    }
    if (cornerElem != null) {
        FemMarker mkr = new FemMarker(0.3, -0.07, -0.03);
        myFemMod.addMarker(mkr, cornerElem);
        RenderProps.setPointStyle(mkr, Renderer.PointStyle.SPHERE);
        RenderProps.setPointRadius(mkr, 0.01);
        RenderProps.setPointColor(mkr, Color.WHITE);
        Particle part = new Particle(1, 0.5, -0.07, -0.03);
        RenderProps.setPointStyle(part, Renderer.PointStyle.SPHERE);
        RenderProps.setPointRadius(part, 0.01);
        part.setDynamic(false);
        myMechMod.addParticle(part);
        AxialSpring spr = new AxialSpring(1000, 0, 0);
        myMechMod.attachAxialSpring(part, mkr, spr);
        RenderProps.setLineStyle(spr, Renderer.LineStyle.SPINDLE);
        RenderProps.setLineRadius(spr, 0.01);
        RenderProps.setLineColor(spr, Color.GREEN);
    }
    int numWays = 0;
    double res = 0.2;
    for (int i = 0; i < numWays; i++) {
        addWayPoint(new WayPoint((i + 1) * res, true));
    }
    addControlPanel(myMechMod, myFemMod);
}