Ted Wiggin

I'm running into an issue when trying to draw with transparency in jit.lcd. I'm trying to draw into the LCD object such that the marks appear on a transparent background and can be seamlessly alphablended with another layer. 

The LCD object works right out the gate, the problem comes when I want to clear the drawing. The 'clear' or 'reset' messages both clear the RGB channels, but they set the alpha channel to full on-- Where there was once no alpha, after I clear or reset the LCD object, there is now full alpha. Any advice on how I might clear the drawing and also clear the alpha channel?

Here is a stripped-down demonstration of the problem:

comment

message

loadmess

toggle

prepend

pack

random

metro

jit.lcd

jit.pwindow

jit.unpack

Hi all--
I'm running into an issue when trying to draw with transparency in jit.lcd. I'm trying to draw into the LCD object such that the marks appear on a transparent background and can be seamlessly alphablended with another layer. 
 
The LCD object works right out the gate, the problem comes when I want to clear the drawing. The 'clear' or 'reset' messages both clear the RGB channels, but they set the alpha channel to full on-- Where there was once no alpha, after I clear or reset the LCD object, there is now full alpha. Any advice on how I might clear the drawing and also clear the alpha channel?
 
Working in Max 8.0.0
 
Here is a stripped-down demonstration of the problem: 

Hi all--
I'm running into an issue when trying to draw with transparency in jit.lcd. I'm trying to draw into the LCD object such that the ma

alpha-channel-issue-with-jit-lcd

It happens with Rob Ramirez's answer to this post.

https://cycling74.com/forums/jit-lcd-drawing-layer-on-top-of-video

It all works well if you re-create the jit.lcd object by deleting it and creating it again.

But clear and reset just set the alpha channel to full.

It happens with Rob Ramirez's answer to this post.
https://cycling74.com/forums/jit-lcd-drawing-layer-on-top-of-video

It all works well if you re-create the jit.lcd object by deleting it and creating it again.
But clear and reset just set the alpha channel to full.

If anyones looking for a semi solution he's a work around simplified from tutorial 29.

alpha channel issue with jit.lcd