New Relative Attribute Mode For Relative Effects

[Mathieu]

In beta version 496, when selecting attributes, there's a new "relative" option. When activated, values coming into the attribute are scaled to be between the specified min&max and then added to all other grids. The trick is that the min can be negative.

For example, you set the start position of a moving head in a grid. Then to make the pan swing +- 20 degrees, you can do that from any grid by using the relative mode and setting the min to -20 and the max to 20. This means the swing effect is independent of the start position.

Relative attributes are modulated by the grid's activation. So if the grid activation is at 50%, you get a +-10 degrees swing with the above effect.

Same thing for a hue effect that can offset the current hue by a certain amount, without knowing about the initial hue value.

Another nice new possibility is offsetting the hue of a video.

Look at the attached project file for an example.

Download here: https://www.lightjams.com/history.html

[o865324]

Mathieu, this is great. I have been testing it. A question for you though.

Yesterday you said to me

>And you should think in terms of areas instead of center positions since you want to generate movements. So instead of thinking about defining a fixed position for the singer, define a singer's range using the min&max of the pan&tilt, where 50% power should go to the center. Then your sources will be able to generate oscillations and other kind of movements around the center.

This did get me thinking... Always a bad thing!

If I build an area grid called "Singer" for example which has a restricted range of pan and tilt values of say 10 degrees with the centre of the range positioned on the singer.
I then build another area grid called "Audience" which points the lights out towards the front but has a much larger restricted range of pan and tilt of say 45 degrees, because the audience covers a larger space than the singer.

Now, I build my relative movement effect of say a simple 0 to 100% power sine wave acting on the pan and tilt. I want the lights to oscillate 10 degrees around the singer, so I have to restrict the P&T values in the Movement grid again to 10degrees.
Now I switch to the Audience position, and I want the lights to oscillate 45 degrees around the audience. I think I have to build another movement grid for this because the 1st relative movement grid is restricted to 10 degrees oscillation?

Would it be better to be able to build the movement effect to go from 0 to 100% with no restrictions and apply it over any other Area grid, and for it to respect the restrictions of the Area grid? Then the movement effect can be reused over any area grid.

Not sure what happens with precedence or if multiple area grids are active though!

[Mathieu]

Reuse is good but it comes to a point that you don't have much to gain giving the increase in complexity. Better to just copy/paste the source generating the movement. Sources are pretty cheap.

[Mathieu]

>> I think I have to build another movement grid for this because the 1st relative movement grid is restricted to 10 degrees oscillation?

An info that may help you in this case. The grid's activation multiplies the relative effect. So you can set the movement to +-45 degrees and use the grid activation to scale it down to +-10 degrees when needed.

[o865324]

An info that may help you in this case. The grid's activation multiplies the relative effect. So you can set the movement to +-45 degrees and use the grid activation to scale it down to +-10 degrees when needed.

That's great - I'm using that.

I've just seen that you can add attributes in relative mode and also add the grid in relative mode. What is the difference please? How do they work together?

[Mathieu]

Not sure what you mean by "grid in relative mode". I've not added this feature... If you mean the grid's activation attribute that you can put on a grid, then if you set it to be relative, it works like any other attribute in relative mode: it adds to the final attribute value.

[o865324]

This is a grid activation attribute. It has a relative tickbox.

[Mathieu]

It works like all attributes. When relative, the value is added to the attribute, which in this case determines the activation of a grid. There's nothing special.

[Igor Roberti Foc]

Bravo, thanks.
This can be a solution for many many things