/// <summary>
/// Do step routine in which the actual simulation result is generated
/// </summary>
/// <param name="time"></param>
/// <param name="simulationState"></param>
/// <returns></returns>
public override MSimulationResult DoStep(double time, MSimulationState simulationState)
{
//Create a new simulation result
MSimulationResult result = new MSimulationResult()
{
Events = simulationState.Events != null ? simulationState.Events : new List <MSimulationEvent>(),
Constraints = simulationState.Constraints,
SceneManipulations = simulationState.SceneManipulations != null ? simulationState.SceneManipulations : new List <MSceneManipulation>()
};
//Create variables representing the next object position/rotation
MTransform nextObjectTransform = subjectTransform.Clone();
//Use the constraint manager to manage the constraints
List <MConstraint> tmpConstraints = result.Constraints;
//Set the constraints
constraintManager.SetConstraints(ref tmpConstraints);
//Compute the new hand position and rotation
MVector3 deltaPosition = this.targetObjectTransform.Position.Subtract(subjectTransform.Position);
float distanceToGoal = deltaPosition.Magnitude();
//Get the current object position
float maxDistance = (float)time * 1.0f;
//Check the current distance to goal
if (distanceToGoal < 0.01f)
{
result.Events.Add(new MSimulationEvent(this.instruction.Name, mmiConstants.MSimulationEvent_End, this.instruction.ID));
}
else
{
//Compute the new hand position (normalize delta position and multiply by max distance)
nextObjectTransform.Position = this.subjectTransform.Position.Add(deltaPosition.Normalize().Multiply(Math.Min(distanceToGoal, maxDistance)));
//Compute the weight for slerping (weight increases with shrinking distance to target)
float weight = Math.Max(0, 1 - distanceToGoal);
//Just perform an interpolation to gather new hand rotation (weight is determined by the translation distance)
nextObjectTransform.Rotation = MQuaternionExtensions.Slerp(this.subjectTransform.Rotation, this.targetObjectTransform.Rotation, weight);
}
//Adjust the transformation of the object which should be moved
result.SceneManipulations.Add(new MSceneManipulation()
{
Transforms = new List <MTransformManipulation>()
{
new MTransformManipulation()
{
Target = this.subjectTransform.ID,
Position = nextObjectTransform.Position,
Rotation = nextObjectTransform.Rotation
}
}
});
//Get the current hand position in global space
MVector3 globalHandPosition = nextObjectTransform.TransformPoint(this.handPositionOffset);
MQuaternion globalHandRotation = nextObjectTransform.TransformRotation(this.handRotationOffset);
//Set the desired endeffector constraints
constraintManager.SetEndeffectorConstraint(this.handJoint, globalHandPosition, globalHandRotation);
MIKServiceResult ikResult = this.ServiceAccess.IKService.CalculateIKPosture(simulationState.Current, constraintManager.GetJointConstraints(), new Dictionary <string, string>());
//Generate a new posture using the ik solver and the specified constraints
result.Posture = ikResult.Posture;
//Return the result
return(result);
}
