---- GETTERS AND SETTERS ----

local function ModifyTransformation(cast: ActiveCast, velocity: Vector3?, acceleration: Vector3?, position: Vector3?)
	local trajectories = cast.StateInfo.Trajectories
	local lastTrajectory = trajectories[#trajectories]
	
	-- NEW BEHAVIOR: Don't create a new trajectory if we haven't even used the current one.
	if lastTrajectory.StartTime == cast.StateInfo.TotalRuntime then
		-- This trajectory is fresh out of the box. Let's just change it since it hasn't actually affected the cast yet, so changes won't have adverse effects.
		if (velocity == nil) then
			velocity = lastTrajectory.InitialVelocity
		end
		if (acceleration == nil) then
			acceleration = lastTrajectory.Acceleration
		end
		if (position == nil) then
			position = lastTrajectory.Origin
		end	
		
		lastTrajectory.Origin = position
		lastTrajectory.InitialVelocity = velocity
		lastTrajectory.Acceleration = position
	else
		-- The latest trajectory is done. Set its end time and get its location. 
		lastTrajectory.EndTime = cast.StateInfo.TotalRuntime
		
		local point, velAtPoint = unpack(GetLatestTrajectoryEndInfo(cast))
		
		if (velocity == nil) then
			velocity = velAtPoint
		end
		if (acceleration == nil) then
			acceleration = lastTrajectory.Acceleration
		end
		if (position == nil) then
			position = point
		end	
		table.insert(cast.StateInfo.Trajectories, {
			StartTime = cast.StateInfo.TotalRuntime,
			EndTime = -1,
			Origin = position,
			InitialVelocity = velocity,
			Acceleration = acceleration
		})
	end
end

function ActiveCastStatic:SetVelocity(velocity: Vector3)
	assert(getmetatable(self) == ActiveCastStatic, ERR_NOT_INSTANCE:format("SetVelocity", "ActiveCast.new(...)"))
	assert(self.StateInfo.UpdateConnection ~= nil, ERR_OBJECT_DISPOSED)
	ModifyTransformation(self, velocity, nil, nil)
end

function ActiveCastStatic:SetAcceleration(acceleration: Vector3)
	assert(getmetatable(self) == ActiveCastStatic, ERR_NOT_INSTANCE:format("SetAcceleration", "ActiveCast.new(...)"))
	assert(self.StateInfo.UpdateConnection ~= nil, ERR_OBJECT_DISPOSED)
	ModifyTransformation(self, nil, acceleration, nil)
end

function ActiveCastStatic:SetPosition(position: Vector3)
	assert(getmetatable(self) == ActiveCastStatic, ERR_NOT_INSTANCE:format("SetPosition", "ActiveCast.new(...)"))
	assert(self.StateInfo.UpdateConnection ~= nil, ERR_OBJECT_DISPOSED)
	ModifyTransformation(self, nil, nil, position)
end

function ActiveCastStatic:GetVelocity(): Vector3
	assert(getmetatable(self) == ActiveCastStatic, ERR_NOT_INSTANCE:format("GetVelocity", "ActiveCast.new(...)"))
	assert(self.StateInfo.UpdateConnection ~= nil, ERR_OBJECT_DISPOSED)
	local currentTrajectory = self.StateInfo.Trajectories[#self.StateInfo.Trajectories]
	return GetVelocityAtTime(self.StateInfo.TotalRuntime - currentTrajectory.StartTime, currentTrajectory.InitialVelocity, currentTrajectory.Acceleration)
end

function ActiveCastStatic:GetAcceleration(): Vector3
	assert(getmetatable(self) == ActiveCastStatic, ERR_NOT_INSTANCE:format("GetAcceleration", "ActiveCast.new(...)"))
	assert(self.StateInfo.UpdateConnection ~= nil, ERR_OBJECT_DISPOSED)
	local currentTrajectory = self.StateInfo.Trajectories[#self.StateInfo.Trajectories]
	return currentTrajectory.Acceleration
end

function ActiveCastStatic:GetPosition(): Vector3
	assert(getmetatable(self) == ActiveCastStatic, ERR_NOT_INSTANCE:format("GetPosition", "ActiveCast.new(...)"))
	assert(self.StateInfo.UpdateConnection ~= nil, ERR_OBJECT_DISPOSED)
	local currentTrajectory = self.StateInfo.Trajectories[#self.StateInfo.Trajectories]
	return GetPositionAtTime(self.StateInfo.TotalRuntime - currentTrajectory.StartTime, currentTrajectory.Origin, currentTrajectory.InitialVelocity, currentTrajectory.Acceleration)
end