model = {
let model = new Model();
model.addNode({name: 'A', x: 0, z: 0, support: 'xz'});
model.addNode({name: 'B', x: 2, z: 2, fz: -1});
model.addNode({name: 'C', x: 4, z: 0, support: 'xz'});
model.addTruss({name: '1', nodes: ['A', 'B'], ea: 10});
model.addTruss({name: '2', nodes: ['B', 'C'], ea: 10});
LinearSolver.solve(model);
return model;
}