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Background 

Communication  and  the  expression  of  ideas  is  central  to  the  art  of  lighting. 

Creating  great  lighting  is  a  team  effort  lead  by  the  designer.  The  language  a 

designer  uses  to  communicate  with  the  team,  and  specifically  the  console 

programmer, is crucial to the process of creating the art. The programmer, in turn, 
must then train the console in order to orchestrate the lights to ultimately relay 
the  intent  of  the  designer  to  the  audience.  There  is  ample  opportunity  in  this 
process  for  misinterpretations  to  muddy  the  waters  of  communication.  More 

recently,  and  at  a  furious  pace,  LEDs  and  multiple  attribute  "intelligent"  lights 
have entered the mainstream market and the multitude of options they provide 
has  complicated  this  process  amplifying  the  opportunity  for  'miscue'  of  intent. 
The simple act of positioning a fader somewhere on a 0 to 10 scale will no longer 
suffice. 
  
Not surprisingly, there has been an increasing necessity to simplify the process of 
lighting  control.  Unlike  the  hard  and  fast  rules  that  have  existed  for  decades,  a 
uniform  language  for  designers  and  programmers  to  use  when  describing  light 
behaviors has been non-existent. Moreover, the method used by the console to 
communicate  to  lights  has  never  been  standardized.  The  pioneering 
manufacturers  of  automated  lighting  equipment  each  implemented  different 
philosophies of control. Historically it has been a challenge for some controllers to 
turn  such  lights  on,  get  them  in  a  color  and  make  them  move  about.  In  all 
respects,  these  consoles  were  merely  outputting  numbers,  sometimes 
masqueraded by words to get the job done. But now that intelligent lighting is no 
longer  in  its  infancy  a  control  system  that  meets  the  needs  of  21

st

-century 

lighting  fixtures  is  a  welcome  addition  to  the  designers'  arsenal.  Cognito 
embraces  that  challenge  and  makes  programming  today's  complex  lighting 
systems simple again.  
  

Let's go back to the advent of computer-controlled lighting to examine the issues 
that  plagued  communication  in  the  theatre.  Before  computers  entered  the 
theatre, the most popular dimmer controllers were known as piano-boards. These 
large  devices  had  individual  handles  for  each  dimmer  and  designers  would  ask 
operators  to  move  a  handle  to  a  position  to  set  the  light  level.  These  'move' 

instructions were written down as cues and with each one executed in succession 
you had a show. The advantage of this system (which was only realized fully after 

the  obsolescence  of  piano-boards)  was  that  each  move  could  be  controlled  at 

different rates and multiple moves could be executed simultaneously by different 
operators. 

Содержание cognito2

Страница 1: ...r been easier because of Natural Language Control 1 BACKGROUND 2 TALKING TO THE LIGHTS WITH BITS AND BYTES 4 TALKING TO THE LIGHTS WITH NATURAL LANGUAGE CONTROL 4 PAN AND TILT EXAMPLE 6 ZOOM EXAMPLE 1...

Страница 2: ...ommunicate to lights has never been standardized The pioneering manufacturers of automated lighting equipment each implemented different philosophies of control Historically it has been a challenge fo...

Страница 3: ...ex cue timing that two or three piano board operators did in the past As these preset consoles recorded every channel in every cue they only moved from state to state This resulted in robotic or non o...

Страница 4: ...ng light systems the resolution was doubled to 16 bit providing 65536 steps of resolution Computers then calculated fades that produced a one to one relationship between the 65 000 steps directly to m...

Страница 5: ...laceholders for a combination of values between 0 and 65535 The words themselves do not mean anything to the desk They are just displayed on the screen for convenience In contrast with Natural Languag...

Страница 6: ...a value of 50 means go to Home and a value of 100 means go to the pan stop 180 degrees from Home Figuring out that 90 degrees is half way in between those two values is easy That would be 75 And a 45...

Страница 7: ...ttribute is represented in real world units of degrees Therefore when you talk to the light you tell it to pan so many degrees Forty five degrees is forty five degrees This makes controlling a rig tha...

Страница 8: ...one place to another on stage given two stored end places Moving lights achieve movement by physically moving the source with two motors housed within a yoke This Pan Tilt relationship equates to a po...

Страница 9: ...point A to point B the light normally travels in a straight line Cognito has a Positon attribute called P T Mode that alters the way fades are calculated when you advance from one position to another...

Страница 10: ...both and crank the wheel and hope to get matching results Natural Language Control eliminates this unnecessary practice Here are two lights one that has a zoom range of 19 to 70 the other from 10 to...

Страница 11: ...0 It is only when writing cues that you are limited to the physical constraints of the light currently patched Shutter Control Example One of the most time consuming endeavors when programming moving...

Страница 12: ...can be a time consuming effort of hunting and pecking for the right channel or more likely pair of channels That is why Natural Language Control groups related pairs together into useful names like T...

Страница 13: ...one handle for controlling the Angle of that shutter If you rotate the yellow wheel to the right the shutter rotates right Note that the Thrust is measured in percentage Most moving lights only allow...

Страница 14: ...trol Individual moving light manufacturers implementation of gobo control is frustratingly inconsistent There are so many things these modern machines allow us to do but there has never been a consist...

Страница 15: ...re generic and are only used to show how it could be done using linear DMX512 channels compared with how it s handled using Natural Language Control The first of the pair of these linear channels is u...

Страница 16: ...t moving one tick forward would give you Pinwheel and one tick backwards would give you Open To rotate the Dots gobo continuously in the clockwise direction the first handle must be placed at 60 That...

Страница 17: ...nge direction and speed up again as you adjust the control channel This can be very disconcerting for a designer who is watching the stage None of those behaviors were asked for but were necessary to...

Страница 18: ...difficult for the lighting programmer as he never knows what a handle will do without first checking the state of the mode channels Natural Language Control eliminates this need for reference by not...

Страница 19: ...d out to the user In this example Gobo 1 Wheel Mode yellow wheel is dialed to Select the current Gobo Selection red wheel is Alpha Rays the Gobo1 Mode blue wheel is set to Index and the gobo has been...

Страница 20: ...y you can t prevent this from happening That is why the Wheel Mode is Spin and the Gobo Mode is Index you are not shown the corresponding Index attribute which was set to 45 above When you do want a l...

Страница 21: ...rties like Position and Zoom is only the tip of the iceberg when using Natural Language Control The real power of Natural Language Control can be seen when you start using similar but not identical at...

Страница 22: ...placed in the path of the light to subtract out different wavelengths By introducing varying amounts of filtration a variety of colors can be produced Either way additive or subtractive the concept is...

Страница 23: ...hts and you travel from one venue on Thursday to a different venue on Saturday Natural Language Control can greatly reduce the amount of work needed during Saturday s focus session Here the cues are w...

Страница 24: ...cue only and restore them in the next You must look up the RGB values from the preceding cue to restore them Natural Language Control adds a phantom attribute to RGB lights This intensity attribute do...

Страница 25: ...ost anything with very little saturation or lack of a dominant wavelength is white White light is defined with a combination of colors or a Correlated Color Temperature measured in Kelvin Kelvin like...

Страница 26: ...they cool off which makes the light warmer or more red This is appealing and we ve become accustom to this behavior Think of a restaurant at night they dim the lights to match the intensity and color...

Страница 27: ...fade from a hue of 5 to a hue of 80 as this will show you most of the rainbow not very subtle Even though some consoles have color pickers that allow you to quickly grab any colors at the end of the...

Страница 28: ...hroic glass is in the lens tube sucking most of the color and intensity out of the light and you dip toward mud Regardless of what color system your fixtures use if you fade in the HSV color space fro...

Страница 29: ...e seems natural when going from purple to green We call this a Subtle fade If we went from pink to amber it would fade through red It always takes the shortest path between color or the path that prod...

Страница 30: ...um We use colloquial terms that have been used in the theatre for years and present them to the programmer with sense and order Confusing mode channels that change the purpose of other channels have b...

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