#title CreateHingeConstraint [RCBasic Doc] #header Function CreateHingeConstraint( actorA, frameA, useReferenceFrameA ) Simulates a hinge joint, which allows two actors (or an actor and the world) to rotate around a single axis while restricting movement along the other axes. This is similar to the way a door swings on its hinges or how an elbow joint functions in the human body. #code actorA = CreateCubeActor(100) 'Creates a cube actor frameA = DimMatrix(4, 4) 'A transform matrix must be a 4x4 matrix SetIdentityMatrix(frameA, 4) 'Sets frameB to a 4x4 identity matrix SetMatrixTranslation(frameA, 0, 1, 0) 'Sets the attach point of the constraint to the top of the cube hinge = CreateHingeConstraint(actorA, frameA, true) #/code Note: It is recommended to use CreateHingeConstraintEx() in most cases #ref CreateHingeConstraintEx SetIdentityMatrix SetMatrixTranslation SetMatrixRotation