i had made some tests with Wysiwyg, i had drawn a plot with fixtures, i had created 3 positions and i had moved and turned all fixtures. After i had calculate offset for all fixtures changes them in edit view and when i load postions all was good , i tested it 3 times with sucess.
So it seems to work and should be really interesting to have this palette.
You may have found a case or two where this works, but the fact of the matter is that you can't accurately map a 3D space with only 2 pieces of information. It could be done with XYZ coordinates or Pan, Tilt, and distance, but not with only pan and tilt.
Here's a good example of why: When the hang position of a fixture changes, the relation of positions does not remain constant.
Imagine that you have a FOH truss with a single moving head hung dead center.
Imagine also that you have 2 positions on the quarter lines, DSL and DSR.
Let's say for example that the DSR position is pan -20° and tilt +45° and that the DSL position is pan +20° and tilt +45°. Notice the difference between the pan values is 40 degrees.
If the position of the FOH truss moves back farther into the house, the positions might be at pan -10° / tilt +60° and pan +10° / tilt +60°. Notice that now the difference between the pan values is only 20 degrees.
This is a fairly simple example with only 1 fixture and 2 positions. Things get even more complicated when you have fixtures scattered about the stage.
What this boils down to is that you can't accurately define a point (your focus position) in three dimensional space with only two pieces of information.
I hope this clears things up. XYZ positioning is still an open feature request and would offer the functionality that you desire.
I used to be a compu guy..it's been a long time now, but i believe the function you are talking about is the "lead/follow" function which was based on 3d positioning, where you needed to set UL,UR,DL,DR to set the working area of your stage.. much like on the H2.. I could be wrong though..
ah, yes. i do remember delta.. but i never used it with pan tilt though.. only intensity and zoom,focus,etc... are you shure it worked on pan/tilt?
-as for Tom's explanation, i'm pretty shure he is right.. there is no way you in teory can acchieve this with only two parameters..
-you can in some situation get close, and probably close enough, but there are many cases you will be WAY off.. one thing to notice is that what you describe will probably work much better with a mirror fixture..(as did/does the xyz on most consoles).. i believe this was probably a feature that worked ok in the days when moving mirrors was dominant..
-another (extreme) example with a movinghead..say you have a fixture hanging 4 meters above your head 4 meters behind you on the stage..(pan 0degrees,tilt45 now you stand still, but move the fixture so that it is hanging over your head, if you now apply correction on the tilt axis(-45degrees) you will see that all previous positions with any pan position, but with 45 degree tilt, will just point straight down now..(and this is also the reason that when dealing with xyz positioning with a movinghead you need to place the fixture right)
i think that's working because i'm talking of something like 0 to 5° not 180 or 270°, on tour i have evry days the same truss and same fixtures at same position. I'm sure Tom is wright, but i I heard talking about this option on hog III.
If you're working with small changes in fixture position, the updated palettes are still going to be wrong, but possibly by smaller amounts.
There isn't *any* case where we could guarantee that all positions would be correctly updated, even with small moves. This all boils down to the same issue: Pan and tilt does not give enough information to accurately define a point in three dimensional space. You would need XYZ coordinates or Pan, Tilt, and Distance.
We know that we don't have enough information to implement functionality like this in a useful way, so it won't be feasible until we have a 3D positioning system like XYZ from the Wholehog 2.
Looks like the thread veered from original point. Back to the idea of a 0 Palette or perhaps this:
Grab a light (or layer set), set it's position, focus, zoom, scale, x pos, y pos, z rot, keystone [n], or shutter [n] into palette windows and have a right click option that will use these values to update the "Edit Fixture" page for offsets.
The same would also work for defining all parameters and then having a right click assignment for setting default values.
I'm saying make it work like Highlight and LowLight.
