Hey, I have the path at frames\frame%d.png, but it still isn't working. Everything is a png. Everything is in "frames". IDK what's wrong with it.

`Traceback (most recent call last):

File "/usr/lib/python3.8/multiprocessing/pool.py", line 125, in worker result = (True, func(*args, **kwds))

File "/usr/lib/python3.8/multiprocessing/pool.py", line 48, in mapstar return list(map(*args))

File "backend.py", line 118, in get_expressions for expr in get_latex(FRAME_DIR + '/frame%d.%s' % (frame+1, FILE_EXT)):

File "backend.py", line 92, in get_latex path = get_trace(get_contours(filename))

File "backend.py", line 62, in get_contours gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-ms668fyv/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'`

Full error traceback:

multiprocessing.pool.RemoteTraceback: """ Traceback (most recent call last): File "/usr/lib/python3.8/multiprocessing/pool.py", line 125, in worker result = (True, func(*args, **kwds)) File "/usr/lib/python3.8/multiprocessing/pool.py", line 48, in mapstar return list(map(*args)) File "backend.py", line 118, in get_expressions for expr in get_latex(FRAME_DIR + '/frame%d.%s' % (frame+1, FILE_EXT)): File "backend.py", line 92, in get_latex path = get_trace(get_contours(filename)) File "backend.py", line 62, in get_contours gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-ms668fyv/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'

"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last): File "backend.py", line 208, in frame_latex = pool.map(get_expressions, frame_latex) File "/usr/lib/python3.8/multiprocessing/pool.py", line 364, in map return self._map_async(func, iterable, mapstar, chunksize).get() File "/usr/lib/python3.8/multiprocessing/pool.py", line 771, in get raise self._value cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-ms668fyv/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'

Instead of using png images I'd used bmp images. In backend.py I changed value of File_Exit = bmp and wrote down full path to frame folder in Frame_Dir. Excuse me for my bad English, hope that somebody can help me with my problem

After getting rid of all errors, when I set f=1 on the page, the grid lines remove, but the page is blank. Im using the sample image provided in the github folder. The screenshot after is also blank. What could be the issue?

Traceback (most recent call last): File "/Users/userdir/DesmosBezierRenderer/backend.py", line 108, in frame_latex = pool.map(get_expressions, frame_latex) File "/Users/userdir/bin/homebrew/Cellar/[email protected]/3.9.5/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/pool.py", line 364, in map return self._map_async(func, iterable, mapstar, chunksize).get() File "/Users/userdir/bin/homebrew/Cellar/[email protected]/3.9.5/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/pool.py", line 771, in get raise self._value NameError: name 'frame' is not defined

""" Traceback (most recent call last): File "/usr/lib/python3.8/multiprocessing/pool.py", line 125, in worker result = (True, func(*args, **kwds)) File "/usr/lib/python3.8/multiprocessing/pool.py", line 48, in mapstar return list(map(*args)) File "backend.py", line 87, in get_expressions for expr in get_latex(FRAME_DIR + '/frame%d.%s' % (frame+1, FILE_EXT)): File "backend.py", line 62, in get_latex path = get_trace(get_contours(filename)) File "backend.py", line 36, in get_contours gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-ms668fyv/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'

"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last): File "backend.py", line 107, in frame_latex = pool.map(get_expressions, frame_latex) File "/usr/lib/python3.8/multiprocessing/pool.py", line 364, in map return self._map_async(func, iterable, mapstar, chunksize).get() File "/usr/lib/python3.8/multiprocessing/pool.py", line 771, in get raise self._value cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-ms668fyv/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'

I ran the backend and opened the html file in my browser but I didn't understand how to get it running. I wrote f=1 in the first formula line but nothing happened. I also tried pressing the play button next to f=0 but that just created a loop with f constantly increasing and decreasing. Could you please help me with this?

continuation of #4 #4 worked and I installed potrace but when i ran backend.py it came up with a new error

Traceback (most recent call last):
  File "backend.py", line 77, in <module>
    frame_latex.append(get_latex(FRAME_DIR + '/frame%d.png' % (i+1)))
  File "backend.py", line 51, in get_latex
    path = get_trace(get_contours(filename))
  File "backend.py", line 29, in get_contours
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-ms668fyv/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'

pls help me

srry about all the issues

Hi! I have been trying to run the program via WSL for sometime now, but i can't figure out why desmos keeps removing the image. After starting backend.py, I boot up the index.html, and put f=1 in the equation, to which Desmos responds with l="some value" and starts the render. But, after a couple of seconds, the l value returns to 0, and the whole desmos graph is back to empty (I have read in a issue post that a download prompt appears, but nothing of that sort happens for me). I can guarantee the image starts rendering, but disappears suddenly.

Is there something I am doing wrong? Any help would be much appreciated.

Error when running backend.py and then entering f = 1 in the formula field (in the index.html). Here's the error traceback (500 error): [2021-07-04 19:20:40,644] ERROR in app: Exception on /init [GET] Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/flask/app.py", line 2447, in wsgi_app response = self.full_dispatch_request() File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/flask/app.py", line 1952, in full_dispatch_request rv = self.handle_user_exception(e) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/flask_cors/extension.py", line 165, in wrapped_function return cors_after_request(app.make_response(f(*args, **kwargs))) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/flask/app.py", line 1821, in handle_user_exception reraise(exc_type, exc_value, tb) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/flask/_compat.py", line 39, in reraise raise value File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/flask/app.py", line 1950, in full_dispatch_request rv = self.dispatch_request() File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/flask/app.py", line 1936, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) File "/Users/codingdanny/projects/fun/DesmosBezierRenderer/backend.py", line 141, in init return json.dumps({'height': height.value, 'width': width.value, 'total_frames': len(os.listdir(FRAME_DIR)), 'download_images': DOWNLOAD_IMAGES, 'show_grid': SHOW_GRID}) NameError: name 'height' is not defined 127.0.0.1 - - [04/Jul/2021 19:20:40] "GET /init HTTP/1.1" 500 -

I can't figure out why it is not working. I have uninstalled and installed the requirements folder but it still does not work. i think it cant find any module because all the external module have yellow underlines. Also i am very new to python and html.

An option to show equations like this instead of this also, the graph disappears a few seconds after it is finished rendering, even if there is only one frame, so that's kind of annoying and an option to make it output a file with all of the equations(with end lines after each), so its possible to copy and paste it into online desmos

The entire process worked properly, but when loading index.html there are no results, I got an idea to do inspect and see console, and that was showing this error:

index.html:29 GET http://127.0.0.1:5000/init net::ERR_SOCKET_NOT_CONNECTED (anonymous) @ index.html:29

any help?

I'm using wsl and running the command "python3 backend.py". and I get this error:

Desmos Bezier Renderer Junferno 2021 https://github.com/kevinjycui/DesmosBezierRenderer

Processing 513 frames... Please wait for processing to finish before running on frontend

--> Processing complete in 6.9 seconds

• Serving Flask app "backend" (lazy loading)
• Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
• Debug mode: off
• Running on http://127.0.0.1:5000/ (Press CTRL+C to quit) 127.0.0.1 - - [29/Jul/2022 16:48:50] "GET /init HTTP/1.1" 200 - [2022-07-29 16:48:59,070] ERROR in app: Exception on / [GET] Traceback (most recent call last): File "/home/user/DesmosBezierRenderer/env/lib/python3.10/site-packages/flask/app.py", line 2447, in wsgi_app response = self.full_dispatch_request() File "/home/user/DesmosBezierRenderer/env/lib/python3.10/site-packages/flask/app.py", line 1952, in full_dispatch_request rv = self.handle_user_exception(e) File "/home/user/DesmosBezierRenderer/env/lib/python3.10/site-packages/flask_cors/extension.py", line 165, in wrapped_function return cors_after_request(app.make_response(f(*args, **kwargs))) File "/home/user/DesmosBezierRenderer/env/lib/python3.10/site-packages/flask/app.py", line 1821, in handle_user_exception reraise(exc_type, exc_value, tb) File "/home/user/DesmosBezierRenderer/env/lib/python3.10/site-packages/flask/_compat.py", line 39, in reraise raise value File "/home/user/DesmosBezierRenderer/env/lib/python3.10/site-packages/flask/app.py", line 1950, in full_dispatch_request rv = self.dispatch_request() File "/home/user/DesmosBezierRenderer/env/lib/python3.10/site-packages/flask/app.py", line 1936, in dispatch_request return self.view_functionsrule.endpoint File "/home/user/DesmosBezierRenderer/backend.py", line 126, in index frame = int(request.args.get('frame')) TypeError: int() argument must be a string, a bytes-like object or a real number, not 'NoneType'

After following the guide provided, I tried running the index.html file to render an image, yet every time I do so, it kills the page and gives me Error code: RESULT_CODE_KILLED_BAD_MESSAGE. The only thing I have done differently is update numpy so that I could avoid an error with potrace, and it seems to have worked fine with it updated, yet it could possibly be the issue. Is there any other issue I could be running into that could cause the error?

Hi guys, Great project! One feature I would suggest is to add the option to export the official Desmos website - so one can save a frame as a file - and then share it with people???? Regards,

In certain scenarios, like if splitting a GIF into its PNG images, it will be ordered but be named weirdly. Rather than manually changing like 300, hopefully this will change any PNG file to the desired syntax. You can upload any random PNG file you want without renaming them and they will be summarily renamed.