In this example, a flow-driven angular motion is created and assigned. A torsion spring is also defined:

m = new Motion("Flow-Driven Angular");

m.setAxisOfRotation(0, 1, 0);

m.setCenterOfRotation(3, 0, 0);

m.initialPosition = 0;

m.minimum = 0;

m.maximum = 90;

p = m.property("Resistive Torque");

v = p.variation("Torsion Spring");

v.setValue("Engagement Angle", 0, "deg");

v.setValue("Compression Angle", 90, "deg");

v.setValue("Engagement Torque", 0.5, "lbf-in");

v.setValue("Compression Torque", 10, "lbf-in");

p.apply(v);

a.select("VALVE-DOOR");

a.applyMotion(m);

A line-by-line description follows:

A motion object called “m” is created, and is set to type Flow-Driven Angular. The axis of rotation and the center of rotation are set, as are the initial position, and bounds of motion:

m = new Motion("Flow-Driven Angular");

m.setAxisOfRotation(0, 1, 0);

m.setCenterOfRotation(3, 0, 0);

m.initialPosition = 0;

m.minimum = 0;

m.maximum = 90;

A property object, “p”, is created, and set to type Resistive Torque. A variation object, “v”, is created and set to type Torsion Spring. The parameters of the spring are defined and then applied back to the property:

p = m.property("Resistive Torque");

v = p.variation("Torsion Spring");

v.setValue("Engagement Angle", 0, "deg");

v.setValue("Compression Angle", 90, "deg");

v.setValue("Engagement Torque", 0.5, "lbf-in");

v.setValue("Compression Torque", 10, "lbf-in");

p.apply(v);

The part called “VALVE-DOOR” is selected, and the motion is applied to it.

a.select("VALVE-DOOR");

a.applyMotion(m);