The Influence Of Shape Ratio On Efficiency Of Movement Task In Virtual Reality

With the continuous development of information technology and the improvement of computer graphics technology,virtual reality has been fully developed,and it has become a huge potential market nowadays.Virtual reality would build a new world by using computer modeling technology.And the material and color of model are similar to the real world through the rendering technology.The users are able to do some special works that they can't do in the real world based on various sensor devices.The purpose of this research is to study the efficiency of area form on movement task in virtual reality environment.The shape of area in virtual space plays a key role in improving efficiency in virtual space.There are many kinds of variables would affect the efficiency when moving a specific object into the target area in the virtual reality,including the depth distance between the human and the operating position,the movement distance(Amplitude,A),the size of the moving object(it's a sphere in this research,Radius,R),the size of the target area(Width,W.Height,H)etc.To explore the effects of different variables on movement tasks,especially the influence of target area on operational performance.I choose the target area form as the main variable,and I set up 13 groups of form ratios,2 groups of moving object size,2 groups of moving distance and 2 groups of tolerance(Tolerance refers to the difference between the length or width of the target area and the diameter of the ball)in this research.And the width and height of target area would be calculated by form ratios and tolerances.The correct rate and movement time were selected to be researched as the dependent variables.The accuracy rate is only used as a reference,and the result of the movement times is mainly discussed.In addition,manual devices,eye tracking and head tracking are selected as the operating modes of this subject from the diversity of operating modes using in the current virtual reality.This research found that all independent variables had significant influence on the operation time under the handheld device operation and eye tracking operation.In the case of eye tracking operation,the ratio has no significant effect on the operating time(P=0.055),and the other 3 variables have a significant effect on the movement times.From the analysis of the whole time of movement tasks,it was found that the eye tracking is the most difficult operation and it needs the longest time.The whole movement times of head tracking operation is slightly longer than that of manual devices.When the ratio is 1,the movement time is maximum in all operations,which indicates that the operation time is simultaneously influenced by the width and height of the target area.But when the width is kept constant and the height is increased,the movement times of the handheld devices and the head tracking are not decreased obviously,which indicates that the manual operation and head movement are more affected by the width.Maybe it will provide reference value for interface design in virtual reality environment.Eye tracking operation is greatly influenced by both width and height,which is mainly influenced by the need for adjustment when object near the target area.Finally,the virtual reality belongs to the three-dimensional space environment,and there is an independent variable(r)of the moving object used in this study.Therefore,the ID value expression in the revised formula is re fitted.It is found that the influence coefficient of the “r” is very low,and the fitting degree of the new formula is not better.