Use posital values into Smode

Use posital values into Smode

The good process for using Posital values in Smode

This topic describes how to implement video mapping of moving panels thanks to motor encoder feedback. See also Configure Network for posital Configure the network for Posital sensors Read More for network setting related things.

Introduction

Posital is a manufacturer of sensors and encoders. It is ofently use in show industrie to create rotating or mooving video-mapped structure.
The sensors communicate a signal to Smode through network thanks differents prerequisites applications: a Firefox 3.5 and an old version of Java
You can download thoses applications here: http://download.smode.fr/utilities/FRABA%20POSITAL%20PREREQUIST/

Usecase #1: Moving Panels

Smode will receive meters value from a Incremental Rotary Encoders.
But the panels have a start position and an end position in your show.
So, you will receive values in metres corresponding to these positions.
Every panel is connected to a sensor, so you will have to create a Link A link from a source parameter to a set of Link Target Read More for each sensor.
The process will be this one:

On stage, you may be surprised by some changes made to the position of the video projectors, their focal lengths, panel dimensions, etc.
This is why we advise you to use a 2D video mapping technique and mostly the Perspective Interpolation Interpolation between two different perspective placements Read More as mapping tool.
This 2D Placement Defines a placement in 2D space Read More type allow you to define a starting distorsion and a ending distorsion and it automatically distorts the layer through a percentage.
Once every layer that will be mapped to your panel are in Perspective Interpolation Interpolation between two different perspective placements Read More , you can create Link A link from a source parameter to a set of Link Target Read More for each Posital values you'll receive and apply a To Percentage Change the Input number and bind it into a percentage range that goes from 0 to 100% Read More modifier on the link.
This Link Modifier add operations between source and target from a link Read More will convert a start and end values to percentage. Those values will be the starting and the ending valuesof your panel.
Create a percentage Exposed Parameter Allow to control multiple Link Target with a single value Read More for each panel and connect the current position of the Perspective Interpolation Interpolation between two different perspective placements Read More to this percentage
The perspective interpolation allow you to choose a starting and ending percentage value. Between thoses values, Smode will interpolate the deformation you set as start and end and beyond them, Smode will extrapolate.

Once you have Configure Network for posital Configure the network for Posital sensors Read More :
In the To Percentage Change the Input number and bind it into a percentage range that goes from 0 to 100% Read More , set the min and max values depending on the movement of your panels (you may ask to the people in charge to moove the panels).
  1. Move the panel to the starting position
  2. Set the min value
  3. Move the panel to the ending position
  4. Set the max value

You can now start the mapping step like this:
  1. Move the panel to the starting position
  2. Change the Placement 1 points
  3. Move the panel to the ending position
  4. Change the Placement 2 points

repeat this process for each panel and the job is done!

Usecase #2: Moving Panels with two crossed video-projectors


In this case, both video projector use a 2D mapping projection thanks the Perspective Interpolation Interpolation between two different perspective placements Read More .
The ending point of the video projector on the left will be the starting point of the projector on the right.

See Also: