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Published 20 hours ago • verified publisher icon Scott-Cooper

cropped and rotated image/canvas

Open NoPinky opened this issue 7 years ago • 2 comments

I use processing-3.3.4 to test and it seems like there is a hardcoded w/h ratio in the process. All images are centered and cropped with 4:3 ratio (or so, I don't know). Also all images I tried, even some of your included sample images in the pics folder, are rotated 90° CCW. It is easily fixed with the rotation feature you provided, but this only applied to the onscreen render. The generated pdf file is still has incrrect orientation. I don't know if the images from g-code would have correct orientation as I don't work with g-code. I don't have programms that render g-code to image. Here is an image to show you the cropped result, left and right parts of the original image was cut off:

girl_face_clipped

Thanks for your work :)

NoPinky avatar Jul 12 '17 00:07 NoPinky

Hey NoPinky, I really appreciate the comments.

My particular robot draws better if I draw rectangular images vertically. Therefore I purposely rotate all my gcode to be taller than wide. If you don't want this bug/feature, comment out image_rotate(); in the setup_squiggles function. Unfortunately, right now, this also messes up other stuff like the directional strokes.

The auto center-crop can also be avoided by commenting out image_crop(); in the pre_processing() function.

image

I will also be adding a wiki to better describe my weird coordinate system, etc. Hope this helps.

Scott-Cooper avatar Jul 27 '17 16:07 Scott-Cooper

Hi @Scott-Cooper the wiki is still empty as it stands.

I'm quite curious about the crop. I'm also very much looking for a way to invert the Y-axis gcode for a normal pen plotter model. I've made my own pen plotter and am having a hard time figuring out where I can flip the Y-axis direction. I have found comments that someone has removed the - sign and added a - sign to the Y-gcode commands but somehow my gcode does not contain any negative values for Y.

Would there be a solution I can try out? Sorry for posting this in this topic, since I had two questions I thought I'd combine them since they are simple questions.

Thanks for this wonderful script, I am really having a good time with this!

Ohmarinus avatar Jul 14 '19 17:07 Ohmarinus