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Changing Shapes or Perspectives

Sat Aug 27, 2016 1:19 pm

GIMP Version: 2.8.14
Operating System: Windows
GIMP Experience: New User



I want to stretch out rectangles and squares and get odd shapes like in the image below. It seems like the Perspective tool should do that but when I click Transform the rectangle returns to its original shape? I'm not sure what keywords to use to find guidance on this? Does anyone know how to change the shape?

Re: Changing Shapes or Perspectives

Sat Aug 27, 2016 1:41 pm

using perspective tool

initial, a Yellow square
Cattura1.PNG
Cattura1.PNG (4.35 KiB) Viewed 3541 times


intermediate: using the Perspective tool (forward) move the corners as you like
Cattura2.PNG
Cattura2.PNG (80.35 KiB) Viewed 3541 times


final, a Yellow distorted quadrangle
Cattura2.PNG
Cattura2.PNG (80.35 KiB) Viewed 3541 times

Re: Changing Shapes or Perspectives

Sat Aug 27, 2016 1:52 pm

Add Alpha Channel, increase the canvas size.

Re: Changing Shapes or Perspectives

Sat Aug 27, 2016 2:10 pm

I see how to use the Perspective tool to get an odd shape, but then it insists that we click on "Transform" (because Help/Reset/Cancel make no sense). As soon as I do that it reverts to a rectangle? How did you get your yellow shape to remain in that form?

Re: Changing Shapes or Perspectives

Sat Aug 27, 2016 2:53 pm

I just clicked on transform.
Your problem is likely that you start with a square WITHOUT space around it.

Re: Changing Shapes or Perspectives

Sat Aug 27, 2016 2:56 pm

my square is PART of the image (Odin said: increase the canvas size, same idea)

Re: Changing Shapes or Perspectives

Sat Aug 27, 2016 3:12 pm

dinasset: thank you so much! That is exactly the problem. I didn't understand why Odinbc was telling me to use the alpha channel but now it's clear. You are both great to be so helpful and I appreciate your time and willingness to share your knowledge.

:tyspin

Re: Changing Shapes or Perspectives

Sun Aug 28, 2016 6:41 am

If you want to create shapes filled with some unifom color, you don't need the perspective tool, just use the freehand selector in polygon mode (i.e, click on the 4 corners).

Freehand.png
Freehand.png (6.8 KiB) Viewed 3423 times
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