Andrew Edwards Posted December 20, 2012 Posted December 20, 2012 Just to pull as this back into our world for a moment. Projection regardless of the number of D is a simulation or a situation where some of the D is collapsed in some way. Real life is the only thing that could really be called 4D so in actual fact what we do in theatre is the only thing that truly could be billed as 4D.
ramdram Posted December 20, 2012 Posted December 20, 2012 Which might be said to support Einstein...in that if you missed a cue in a show then you can't go back in time for a second go. But you can rerun the cue in rehearsals...crikey I think theatre HAS discovered time travel.
timsabre Posted December 20, 2012 Posted December 20, 2012 An issue of L&SI just arrived has an article about Cast's Blacktrax system saying it's 6D. So 4D is obviously old hat now. Their 6D's are x, y, z, roll, pitch and yaw.
Andrew Edwards Posted December 20, 2012 Posted December 20, 2012 Bahaha! I'm not having that. RPY are just functions of 2 of the other axes. Surely if their tracking system moved along one of the extra 2 dimensions it would disappear or at least lose one or more of the dimensions we can perceive.
kitlane Posted December 20, 2012 Posted December 20, 2012 An issue of L&SI just arrived has an article about Cast's Blacktrax system saying it's 6D. So 4D is obviously old hat now. Their 6D's are x, y, z, roll, pitch and yaw. 6D (should really be 6DoF) refers to 6 degrees of freedom. That is, movement along the the three axes and rotation about them.
Brian Posted December 20, 2012 Posted December 20, 2012 6D (should really be 6DoF)... Surely it should be "3D + 3DoF"?
kitlane Posted December 20, 2012 Posted December 20, 2012 6D (should really be 6DoF)... Surely it should be "3D + 3DoF"? I don't believe so. There are 6 degrees of freedom, Up/down, left/right, forward/backwards (I prefer hither/yon), pitch, yaw and roll. Sailors might say pitch, yaw, roll, heave, sway and surge. The 'D' in this case stands for 'Degree' and not 'Dimension'. This is a commonly understood and well defined concept in mechanics, engineering, robotics and the like. Degrees of Freedom can also be used to describe the axes of motion and positioning that, for example, a robot possesses. This could be more than 6 but the final position can still be simplified to 6.
IRW Posted December 20, 2012 Posted December 20, 2012 6D (should really be 6DoF)... Surely it should be "3D + 3DoF"? I don't believe so. There are 6 degrees of freedom, Up/down, left/right, forward/backwards (I prefer hither/yon), pitch, yaw and roll. Sailors might say pitch, yaw, roll, heave, sway and surge. The 'D' in this case stands for 'Degree' and not 'Dimension'. This is a commonly understood and well defined concept in mechanics, engineering, robotics and the like. Degrees of Freedom can also be used to describe the axes of motion and positioning that, for example, a robot possesses. This could be more than 6 but the final position can still be simplified to 6. Maybe people should stop using so many acronyms- this very debate shows how confusing they can be- especially in an industry where 'communication is everything'!
timsabre Posted December 20, 2012 Posted December 20, 2012 The 'D' in this case stands for 'Degree' and not 'Dimension'. Obviously needs explaining to the L&SI writers as the article repeatedly refers to measuring anywhere in "3D space" then goes on about "6D".
ramdram Posted December 21, 2012 Posted December 21, 2012 Shirley the p,r,y are just turning moments about each axis and not separate "dimensions". Doubtless this simple explanation from wiki' will make this clear...ahem. http://en.wikipedia.org/wiki/Cartesian_coordinate_system I think we are stuck with 4 dimensions that "we" can see and experience.
Robin D Posted December 21, 2012 Posted December 21, 2012 The other confusion is that Disney et al have confused dimensions with senses. Yes its 3D vision to which they add the senses of touch and smell. The only thing missing is taste unless they can find a way of delivering the elusive 6th sense! The sense of hearing is already present of course and that in itself can be multi dimensional. 2 = stereo etc. If the marketing guys and girls get their heads round it all we'll soon be seeing 99D advertised and its will still all be senseless nonsense!
Brian Posted December 21, 2012 Posted December 21, 2012 ... we'll soon be seeing 99D advertised ... Just don't Google that phrase; it's likely to be NSFW.
kitlane Posted December 21, 2012 Posted December 21, 2012 Shirley the p,r,y are just turning moments about each axis and not separate "dimensions". Doubtless this simple explanation from wiki' will make this clear...ahem. http://en.wikipedia....ordinate_system I think we are stuck with 4 dimensions that "we" can see and experience. Precisely. They are not 'Dimensions', they are 'Degrees of Freedom' Wiki article Euler Angles, Wikipedia
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