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## Using delta time in game loop and physics calculations doesn’t work as desired

I know there have been similar questions on this site and others, but after trying to apply the different things I read into my own code, none seem to really solve my issue or help my understanding. And so I allow myself to open a new question. So I’m trying to implement a simple ball-jumping […]

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main.auth_user__old in django tutorial going through mosh created a web server.When saving some polls or products or set i get this error instead of going to be saved on the site. Heres the error OperationalError at /admin/products/product/add/ no such table: main.auth_user__old Request Method: POST Request URL: http://127.0.0.1:8000/admin/products/product/add/ Django Version: 2.1 Exception Type: OperationalError Exception Value: […]

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## Prop: Image of $f(X)$ is compact under $f$

Let $(X,d)$ and $(Y,d)$ be metric spaces and $(X,d)$ is compact. Further let $f : X \rightarrow Y$ be a continuous map. Prop: Image of $f(X)$ is compact under $f$. Pf: We wish to show that $f(X)$ is totally bounded and complete. Since $X$ is totally bounded,\$\forall r>0, \exists x_1,…,x_n \in X : X \subseteq […]

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## Is an interpretation just a homomorphism between theories?

I don’t understand model theory, but I think I’ve read enough about it that I can pretend to by parroting the language of model theorists. So instead of asking “how does model theory work,” I’m going to state what I think I know and why it doesn’t make sense, and then you can tell me […]

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## Is an interpretation just a homomorphism between theories?

I don’t understand model theory, but I think I’ve read enough about it that I can pretend to by parroting the language of model theorists. So instead of asking “how does model theory work,” I’m going to state what I think I know and why it doesn’t make sense, and then you can tell me […]

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## Understanding #pragma acc kernels

I’m trying to optimize nbody algorithm and when I add #pragma acc kernels in the loop, I don’t understand what are the following comment #pragma acc kernels for (i = 0; i < n; i++) { real fx, fy, fz; fx = fy = fz = 0; real iPosx = in[i].x; real iPosy = in[i].y; […]

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## Javascript Snake Movement and Growth

Alright, so I’ve been working on making a decent snake game in javascript for awhile now, and I’ve gotten the basics in, but I am to the hard part in my opinion, which is how to make the snake grow, and how to fix the movement. I have a placeholder way of moving right now, […]

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## How to release webcam while doing face detection?

I have written a code which is planned to perform face, eye and smile detection by capturing frames from my laptop’s webcam. However, when I’m done, the below code does not run and returns an Invalid Syntax Error. I don’t know how to fix this problem because the line returns the error is just the […]

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## Face emotion analysis with WebRTC and Python server

I have a project in which I want to perform a live facial emotion recognition. A client opens a webpage, and his face image is being captured by a camera (built-in laptop camera), then this video is being painted on a canvas (HTML element), then transformed into BLOB and sent over a Python Websocket to […]

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## How to use interpn?

I am trying to use interpn (in python using Scipy) to replicate results from Matlab using interp3. However, I am struggling to structure my arguments. I tried the following line: f = interpn(blur_maps, fx, fy, pyr_level) Where blur maps is a 600 x 800 x 7 representing a grayscale image at seven levels of blur, […]