When I want to make this script:

when green flag clicked
forever
if <color [#ffff00] is touching [#000000] ?> then
Do stuff :: custom
end
end

If the colours are made with pen, it says the conditional is false, even though the two colours are touching. Can someone help me?

Just tried it out - drew a line with pen - when I move my cat sprite over the line it seems to work OK for me (I'm not using same colours as you)

https://scratch-mit-edu.ezproxyberklee.flo.org/projects/302426129/

win 10/chrome

Edited because my trouble was fixed.

CrazyScoop wrote:

My browser / operating system: Windows NT 10.0, Chrome 73.0.3683.103, No Flash version detected

Hello! With the pen extension, I decided to make an “Amount of Ink”. When it draws, it will change it by -0.1, but it sets to -0.1 then changes it by -0.1, is this a bug? Please help me!

make your own topic, please.

SimpleScratch wrote:

Just tried it out - drew a line with pen - when I move my cat sprite over the line it seems to work OK for me (I'm not using same colours as you)

My problem is that I want to detect when two colours drawn by pen overlap, not when a sprite overlaps a line.

14152cool wrote:

CrazyScoop wrote:

My browser / operating system: Windows NT 10.0, Chrome 73.0.3683.103, No Flash version detected

Hello! With the pen extension, I decided to make an “Amount of Ink”. When it draws, it will change it by -0.1, but it sets to -0.1 then changes it by -0.1, is this a bug? Please help me!

make your own topic, please.

Okay!

CR when moving 25 pixels with one colour, switching and moving 25 more pixels, totalling 50. This “bug” implies the sensing block is for sprites only.

Banana

the first color has to be on the sprite.
not bug, feature.

14152cool wrote:

the first color has to be on the sprite.
not bug, feature.

Hmm, that therefore possibly means the block name is misleading. I've never seen anything like that.

Banana

My browser / operating system: Windows 7, Chrome 74.0.3729.131, No Flash version detected

When I draw two lines and use this block:

if <color [#FFFFFF] is touching [#FF0000] ?> then
Do stuff ::grey
end

It returns false, I don't know why.

Dupe

Ironically the same name.

Banana

banana439monkey wrote:

Ironically the same name.

Actually, it looks like they just forgot that they already made a topic about this a month ago and so they made a new one that is the same.

hedgehog_blue wrote:

banana439monkey wrote:

Ironically the same name.

Actually, it looks like they just forgot that they already made a topic about this a month ago and so they made a new one that is the same.

Mod thread merging powers activated!

The Scratch Wiki describes the Color()is_Touching() block: https://en.scratch-wiki.info/wiki/Color_()_is_Touching_()%3F_(block)

“The block checks whether a color on its sprite is touching another color”. If it is, the block returns ‘true’.

So the block is defined to check if the first colour which must be part of a sprite is touching a second colour which may or may not be part of any sprite.


The block is not designed to check if two lines drawn in Pen are touching and will not work in this case.

Scratch stores the colour of each pixel on the stage.
If you draw on a pixel on the stage with a new colour using Pen, the colour of that pixel will be updated.
Then only the second colour exists for that pixel.
ie. the colours do not touch as the previous colour has been replaced in the Pen layer.

Scratch would detect if two lines that are differently coloured sprites are touching as they are stored in different layers.

The Scratch Wiki describes the Color()is_Touching() block: https://en.scratch-wiki.info/wiki/Color_()_is_Touching_()%3F_(block)

“The block checks whether a color on its sprite is touching another color”. If it is, the block returns ‘true’.

So the block is defined to check if the first colour which must be part of a sprite is touching a second colour which may or may not be part of any sprite.


The block is not designed to check if two lines drawn in Pen are touching and will not work in this case.

Scratch stores the colour of each pixel on the stage.
If you draw on a pixel on the stage with a new colour using Pen, the colour of that pixel will be updated.
Then only the second colour exists for that pixel.
ie. the colours do not touch as the previous colour has been replaced in the Pen layer.

Scratch would detect if two lines that are differently coloured sprites are touching as they are stored in different layers.
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bigmaxerpro123 wrote:

-snip-

Thank you for the detailed post, but please don't post on old topics. The touching color blocks are also known for being clunky and unreliable (from my eggsperience).