How do I make a "negative" image?

Inkscape related questions, tips and topics can be posted here
Post Reply
AKmud
1.5 Star Member
1.5 Star Member
Posts: 32
Joined: Wed May 07, 2014 12:20 am

How do I make a "negative" image?

Post by AKmud »

I've run out of descriptions to search... I'm trying to design a sign for a friend and am using a file of an old truck from RHM. The file is designed to be cut out of the sheet, but I want to reverse it and cut it so the image is left behind. Is there a way to do this? The text and windmill are worked out, but the truck is giving me fits.
briar patch.svg
(56.56 KiB) Downloaded 56 times
briar patch.svg
(56.56 KiB) Downloaded 56 times
User avatar
acourtjester
6 Star Elite Contributing Member
6 Star Elite Contributing Member
Posts: 8183
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: How do I make a "negative" image?

Post by acourtjester »

Ok here is what I came up with, I put an oval around the truck. You may need to be sure the oval and the trucks outer line is connected to each other so it will not drop out, then when planning the cut cut all the inner parts of the truck as inside offsets or on the line. And the inside section of the oval and the outside of the truck is cut as a inside offset to keep it attached to the sign.
truck parts.JPG
truck.JPG
truck redo 1.svg
(103.23 KiB) Downloaded 59 times
truck redo 1.svg
(103.23 KiB) Downloaded 59 times
DIY 4X4 Plasma/Router Table
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PowerTig 255 EXT
User avatar
acourtjester
6 Star Elite Contributing Member
6 Star Elite Contributing Member
Posts: 8183
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: How do I make a "negative" image?

Post by acourtjester »

I when back and attached the truck and oval but you will need to do it in the other file.
truck attached.JPG
DIY 4X4 Plasma/Router Table
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PowerTig 255 EXT
AKmud
1.5 Star Member
1.5 Star Member
Posts: 32
Joined: Wed May 07, 2014 12:20 am

Re: How do I make a "negative" image?

Post by AKmud »

Thanks Jester. With your design, the oval will be cut out as well correct? The truck is just bridged to the background? Is there a way to just make the silhouette of the truck?
User avatar
acourtjester
6 Star Elite Contributing Member
6 Star Elite Contributing Member
Posts: 8183
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: How do I make a "negative" image?

Post by acourtjester »

Yes sir see attached image
truck attached.JPG
DIY 4X4 Plasma/Router Table
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PowerTig 255 EXT
AKmud
1.5 Star Member
1.5 Star Member
Posts: 32
Joined: Wed May 07, 2014 12:20 am

Re: How do I make a "negative" image?

Post by AKmud »

I got it figured out! Lets see if I can explain this....

I broke apart the truck and then combined all the internal pieces together leaving the outer perimeter. I then broke the perimeter between nodes where I wanted it bridged to the background. I then selected only the pieces of the outer perimeter and selected "stroke to path". This made the segments tightly closed paths that appear like they will allow the truck to cut properly.

I'll cut it tomorrow to see what happens.
briar patch.svg
(113.32 KiB) Downloaded 59 times
briar patch.svg
(113.32 KiB) Downloaded 59 times
User avatar
acourtjester
6 Star Elite Contributing Member
6 Star Elite Contributing Member
Posts: 8183
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: How do I make a "negative" image?

Post by acourtjester »

Looks like that will work easier to look at when you remove the fill, so you only see the cut lines.
More than one way to skin a cat :HaHa
DIY 4X4 Plasma/Router Table
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PowerTig 255 EXT
Post Reply

Return to “Inkscape”