Forces and torques are user prescribed functions of time, displacements and velocities in all three components or along connecting markers. Their motions are user prescribed functions of time. Available actuators are rotational, translational and full six DOF. The curve-curve contact allows liftoffs and collisions based on coefficient of restitution. Both open and closed 3D loops are permitted. Available joints are spherical (ball), revolute (pin), translational (slider), cylindrical, planar, fixed, universal, point in line, point in plane, parallel, perpendicular, no rotation, constant velocity, rack pinion, screw. Mass and inertia properties can be user specified or automatically computed based on uniform density. Exact specification of linear and angular velocities of parts in space are also possible. The parts can be positioned and oriented exactly in space, as are markers on the parts. Available solids are extrusions of rectangles, circles, ellipses and polygons. FreeCAD is capable of full 3D pan, zoom, tilt and rotate on an assembly of parts in wireframe or rendered graphics.
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