This would be great to toggle between pscn and nscn so you could activate/deactivate with a single conductor line.  

ntct, ptct, ertd, tesc..... these all still. choose specials or metal on this one.

I do like this idea. It could add so many more save ideas, like possible a computer monitor that actually creates elements and stuff like that. Idk if anyones tried this before, but you can potentially make a save where you play powdertoy, and the DRAY would act as the clear button.

Or better still, be able to place items at a given set of co-ordinates wihtout a print head

@belugawhale, what happens when DRAY is conducted from: ERTD, TESC, NSCN and PTCT/NTCT?

belugawhale:

Dray- delete ray

Colour: Light blue

Description: Deletes its ctype

This element works similar to cray, except it deletes its ctype only.

When sparked with:

Metl: It would delete the first particle of its ctype, tmp customising the distance, tmp2 number of particles, whichever comes first. Use 65535 if not sure.

Pscn: It would replace the particle chosen by ctype with the particle life (you can type the element name in directly eg. !set life dray watr). Same tmp and life usage as above.

Inst: It would delete a category of particles, determined by ctype. (Ctype 0 is all, 1 is the first from the top, etc.) Same tmp and life usage.

Inwr: It would delete all particles except the ctype. Same life and tmp usage.

Uses: Deleting particles, specific ones. Right now no element can act like replace mode.

 

I know there are many other uses and this would be a useful element.

Edit: I hit the post topic button too early.

 
I like how you stole MY IDEA - You just changed the suggested color from Purple Blue to just Blue!
My Thread Link: https://powdertoy.co.uk/Discussions/Thread/View.html?Thread=18341

@OmegaSupreme (View Post)

 > December 2013

 > January 28th 2014

Uh, it's you who stole the idea.

Seriously