This is a handy little prefab, that’s easy to make. It’s useful if you have a slider with the range of -10 V to + 10 V, it can be fiddly finding the 0 V “null point” with the standard slider.
How the center return slider works.
The control works by having a button or other clickable item send a Mouse Down signal to a Spring module, which then sends a reset value of 0 volts to the Patch Memory, and the Image 2 slider control.
We need to make up the structure below inside a container.
When we change the Image2 filename to “vslider_med.png” this will automatically load the instructions for how the control should behave, so leave this property setting as “Auto”. Likewise with the Image2 that has “button.bmp” loaded.
By connecting the Mouse Down plug of Text Entry4 to the PatchMemory Float3 if we click on this text label it will also reset the control to 0 Volts.
You should untick the Text Entry4’s writeable property so that it can’t be edited from the panel (it keeps it’s mouse down control output though).
All we need to do is set the Reset Value for the Spring module to 0, the the prefab is completed ready to save and use
The maximum and Minimum slider values can be set as normal in the Prefab properties panel when in use in SynthEdit.
Note: Do not try and make the slider return to 0 V “on click” by connecting the Mouse Down plug for the slider control… it won’t work like that. As soon as you move the slider it will send a Mouse Down to the Spring, and as soon as you release the control it will snap back to 0 V.
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