Abstract. This paper proposes a new user interface paradigm for motion capture based animation systems, providing intuitive and efficient ways to visualize the main motion capture concepts and operations. A prototype system was built, implementing the prop
Figure12:Filteringoperationwindow.
Theinterfaceobjectthatrepresentstheconcatenationoperationwasdesignedtoprovideagoodvisualperceptionofthecompositionasawhole.
ThemotionsselectedbytheuserintheScratchPadaredroppedintotheCon-catenationWindow.Initially,theyarepositionedinsuchawaytoperformadirectconcatenation(i.e.,withoutblendinginterval),asshowninFigure
13.
Figure13:Concatenationoperationwindow(initialmotionarrangement).
Usingtheexistingtoolsformotionpositioningandreparametrization,theusercande neblendingintervalsthatwillpermitasmoothtransitionbetweenthecombinedmotions(inFigure14,representedbythedarkerregionsbetweenmotions).
However,someinterfaceconstraintswerecreatedtoavoidundesirableresults.Theseconstraintsensurevisualcoherence,andguidetheuserintheoperationprocess.