Adding target curve for simpler calculations.
Adding target curve for simpler calculations.

Adding a linear target curve for automatic calculation of the current target for SmoothJourney.

edgarriba/OpenSfM,BrookRoberts/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,NicWayand/OpenSfM,mapillary/OpenSfM,sunbingfengPI/OpenSFM_Test,BrookRoberts/OpenSfM,oscarlorentzon/OpenSfM,NicWayand/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,onecue/OpenSfM,BrookRoberts/OpenSfM,onecue/OpenSfM,edgarriba/OpenSfM,oscarlorentzon/OpenSfM,BrookRoberts/OpenSfM,sunbingfengPI/OpenSFM_Test,NicWayand/OpenSfM,edgarriba/OpenSfM,edgarriba/OpenSfM,onecue/OpenSfM,sunbingfengPI/OpenSFM_Test,oscarlorentzon/OpenSfM,NicWayand/OpenSfM,onecue/OpenSfM,sunbingfengPI/OpenSFM_Test,onecue/OpenSfM,BrookRoberts/OpenSfM,NicWayand/OpenSfM,oscarlorentzon/OpenSfM,mapillary/OpenSfM,sunbingfengPI/OpenSFM_Test,edgarriba/OpenSfM