recta | Direct printing from Browser | 3D Printing library

a strange phenomenon occurs. With my edge detection program, I can transfer the inside of the GraphicsPath to a new image. It always works great – except when I scale the original image with GIMP and Word (aspect ratio remains, only the dimensions are changed). Then the area is shifted. To the left and up. See attachement. In line 68, I looked what is in rectCutout. Everything OK.

Does this have anything to do with GIMP? The dots per inch are the same (72). The compression quality of the JPEG also (100%).

I just realized: if I scale an image larger, the result is completely black.

The strange thing is: I'm not saying: the picture that is drawn on is larger than the picture that is saved. Then it would be logical that the path is not in the same position. It's about the fact that the loaded image is just smaller.

I would be happy if someone could tell me why. 😄

this is the scaled image which is loaded

Here you see the GUI, ready to save

cropped image, area has x and y offset

In the game i am currently making i need to make an ennemy move towards a player (here the enemy is a blob) to make this, i already created a function : def calculate_enemy_movement(enemy): and inside of it i put what the function needs to do :

calculate what x value needs to be added each frame(x velocity), and what y value needs to be added each frame(y velocity) to the enemy.x and enemy.y to walk towards the player.x and player.y and then return x velocity and return y velocity.
This function gets called here : add x velocity and y velocity to x and y pos of enemy each frame enemy_blob.x,enemy_blob.y += calculate_enemy_movement(enemy_blob)

now i just need someone to help me create this function. I've already looked into it and i know it has something to do with the vector mathematics but i'm not sure how exactly it works, so if someone could write the function and explain me how it works i would be really pleased.

if you need the rest of the code :

I have a Form1 and a PictureBox. I have also subscribed to the MouseDown, MouseMove and MouseUp events in order to be able to draw a rectangle on the PictureBox with the mouse. In itself, it works fine. Now I am using an OpenFileDialog. If I select the file in the window and click on 'OK', the dialog disappears, but – and this is my problem – a rectangle is drawn immediately because I moved the mouse. I don't want that to happen at the moment. I've already tried to use a Boolean variable to lock the MouseMove procedure, but unfortunately that didn't work.OpenFileDialog Here you can see the accidentally created rectangle

I am trying to write aa small physics demo using Javascript. I have multiple balls that bounce off each other just fine, but things go wrong when I try to add gravity.

I am trying to conserve the momentum once they hit, but when I add constant gravity to each one, the physics start to break down.

Here is what I have in terms of code:

I am trying to add buttons to a kivy gridlayout with a rectangle shape above each of them. But all the rectangles seem to stack up at the bottom left of the screen, nowhere near the buttons. I think multiple rectangles are being created, but all of them are placed above each other, and not over the button. How do I fix it?

main.py:

I'm trying to understand why passing by reference works and passing by value does not in a simple class definition

So I been trying make my Pause function work ever since I moved my start screen away form my game loop to make my crash function work but i started to get a problem witch is making my pause function not work.

https://gyazo.com/c814f08961bf1738b547d0949f9b2f87

the video dose not show much but I am pressing my button that make's my game pause but it is not show the pause game menu, I don't really know why. I have tried to moved my pause function all the way up with my start screen but that did not work to, also I have tried putting it on the main loop but that did not work to.

this is my pause function

So I been trying to make my crash function restart my whole game when the player's live's reaches to 0 but it dose not work

https://gyazo.com/3a039c5d9af3a6868c278c39939314cf

as you can see from the video, it only restarts my lives when the it reaches 0, also it quickly shows the "you crashed" text but I want it to show for a little bit then restart my game. I have tried calling the main_loop with the crash function but that dose not change anything also I have tried putting the code that calls the crash function and makes the game restart above my start screen but that did not work to.

this is what I wrote for my restart game function

I have been working on this game and for some reason every time I add this part https://gyazo.com/8efc90c1bb655c140b83b279e42dd73d,

the fps drops a lot, if you take it out it works good but once you add it back it the the game get super laggy. I have tried taking it out but I want it in, also I have tried putting different levels on the https://gyazo.com/f973f353020018ea56b8773a2c586472

but that did not really work, I have also tried putting the fps higher but that did not work, the last thing I have tried was deleting some of the updates commands but that did not work

what make's my game lag