How to cut an image into small (not rectangular shaped) parts?
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Basically i want to make a little puzzle game, therefore i need to take an image and cut it into little puzzle parts.
Now the problem is i have no idea how to achieve this and need some hints into the right direction or ultimately a little code example.thanks in advance
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Calculate the rectangle of the little piece and then use "copy":http://qt-project.org/doc/qt-5.0/qtgui/qpixmap.html#copy
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[quote author="Chris Kawa" date="1368906652"]Calculate the rectangle of the little piece and then use "copy":http://qt-project.org/doc/qt-5.0/qtgui/qpixmap.html#copy[/quote]
With copy i can only get rectangles (or am i missing something?), thats why i asked for a way to get custom shapes out of an image.
I want to split an image into shapes like this:
!http://c.heimwerker.de/fa/heimwerker-content/thema/wandgestaltung/techniken/schablone/puzzleteil_2.gif(puzzle)! -
It's still a rectangle image. You just need to apply an alpha channel (transparency) to it.
Take a look at "setMask":http://qt-project.org/doc/qt-5.0/qtgui/qpixmap.html#setMask
You can use the image above for the mask, just need to invert the colors. Black is transparent, white opaque. -
Yeah, the other solution would be to have the puzzle piece a vector shape with the image being implemented as a fill, but it will be harder to do compared to images.
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First of all thanks for the answers.
When i think about using setMask im running into a difficulty in my brain. I guess its possible to do it with masks, but of course not every puzzle piece should look the same. In order to give them a "random" look (like the "nipple" more to the top or to the bottom of the piece or the hole more left/right etc.) i would need to use alot of different masks while making sure they are still compatible with eachother (to complete the puzzle in the end).So is there maybe another way?
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Just use a collection of images for different pieces. You can even write a function to generate the rectangle from the mask up left top and bottom maximum values and divide up your image into the right size bits with appropriate masks. I guess it will be a little more work to figure where each piece snaps into place, but certainly doable.
But I guess the best way to go is to actually randomly generate your puzzle pieces. Start with a square, and depending on its position in the entire puzzle just add 2-4 shapes to each end of the square, and naturally, reuse that same shape's negative for the pieces that are situated next.
