20-SIM

20-sim is a modeling and simulation program that runs under Windows. With 20-sim you can simulate the behavior of dynamic systems, such as electrical, mechanical and hydraulic systems or any combination of these.
20-sim supports graphical modeling, allowing to design and analyze dynamic systems. 20-sim supports the use of components. This allows you to enter models as in an engineering sketch by choosing components from the library and connecting them.

20-sim can model systems, using equations, state space descriptions, bond graphs block diagrams, and components or iconic diagrams, in any combination.
Equations in 20-sim follow the standard mathematical notation and can be changed by the user. A large collection of linear, non-linear scalar and matrix functions are available for the use in equations.

Lights: Spot lights
Cameras: The viewpoint of the animation is determined by inserting a camera object. Several of these camera objects can be inserted in the same animation window to allow the user to switch the active camera at runtime. Cameras can also be automated.

20-sim contains simulation algorithms for solving ordinary differential equations (ODE) and differential algebraic equations (DAE). It has a variety of numerical integration methods: one-step, multi-step and multi-order.
20-sim can handle state events using zero-crossing algorithms.
The 3D Mechanics Editor can generate a 20-sim model from your 3D model. This 20-sim model comprises all dynamics and kinematics of the model.

Simulation results in 20-sim Pro can be shown as 3D animation. Any variable of a 20-sim model can be connected to 3-dimensional objects to show animated output.
The basic predefined animation objects are lines, circles, squares, cubes, spheres, cylinders and cones, spirals, and toruses