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banananas

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•Created by banananas on 10/23/2024 in #questions

Creating files from code

Is there a way to create a file from code? I've tried using a python script:

def create_proj(path: str):
    with open(path + "/main.mojo", "x") as f:
        f.write("text goes here")

def create_proj(path: str):
    with open(path + "/main.mojo", "x") as f:
        f.write("text goes here")

then:

from python import *

fn create_proj(folder: String) raises:
    Python.add_to_path(".")
    var file = Python.import_module("createproj")
    file.create_proj(folder)

from python import *

fn create_proj(folder: String) raises:
    Python.add_to_path(".")
    var file = Python.import_module("createproj")
    file.create_proj(folder)

but I have been getting this error:

Unhandled exception caught during execution: module 'createproj' has no attribute 'create_proj'
/home/[USERNAME]/pyregl/.magic/envs/default/bin/mojo: error: execution exited with a non-zero result: 1

Unhandled exception caught during execution: module 'createproj' has no attribute 'create_proj'
/home/[USERNAME]/pyregl/.magic/envs/default/bin/mojo: error: execution exited with a non-zero result: 1

10 replies

DDeno

•Created by banananas on 10/11/2024 in #help

Getting the width and height of an image

I'm trying to get the width and height of an image but I'm not sure how to do so. Could anyone tell me how?

5 replies

DDeno

•Created by banananas on 10/7/2024 in #help

(Littledivy's SDL2 bindings) textures not loading properly

I'm using this script:

// main.ts
import {WindowBuilder, EventType, Rect} from "sdl";
import img from "./utils/img.ts";

export const winScale = 4;

const windowbuilder: WindowBuilder = new WindowBuilder("UNDERTALE Twilight", 332 * winScale, 259 * winScale)
  .highPixelDensity()
  .borderless()
  .transparent()

const window = windowbuilder.build()
export const canvas = window.canvas();
export const cAnchor = [6, 11];

while (true) {
  // input
  for await (const event of window.events()) {
    switch (event.type) {
      case EventType.Quit:
        Deno.exit(0);
        break;
    }
  }

  // render
  canvas.clear();
  const wintex = img("./window.png", canvas.textureCreator());
  canvas.copy(wintex, new Rect(0, 0, 332, 259), new Rect(0, 0, 332, 259));
  canvas.present();
}

// main.ts
import {WindowBuilder, EventType, Rect} from "sdl";
import img from "./utils/img.ts";

export const winScale = 4;

const windowbuilder: WindowBuilder = new WindowBuilder("UNDERTALE Twilight", 332 * winScale, 259 * winScale)
  .highPixelDensity()
  .borderless()
  .transparent()

const window = windowbuilder.build()
export const canvas = window.canvas();
export const cAnchor = [6, 11];

while (true) {
  // input
  for await (const event of window.events()) {
    switch (event.type) {
      case EventType.Quit:
        Deno.exit(0);
        break;
    }
  }

  // render
  canvas.clear();
  const wintex = img("./window.png", canvas.textureCreator());
  canvas.copy(wintex, new Rect(0, 0, 332, 259), new Rect(0, 0, 332, 259));
  canvas.present();
}

With this script:

// utils/img.ts
import { Surface, Texture, TextureCreator } from "sdl";

export default function img(
  image: string,
  creator: TextureCreator,
): Texture {
  const trackSurface = Surface.fromFile(image);
  return creator.createTextureFromSurface(trackSurface);
}

// utils/img.ts
import { Surface, Texture, TextureCreator } from "sdl";

export default function img(
  image: string,
  creator: TextureCreator,
): Texture {
  const trackSurface = Surface.fromFile(image);
  return creator.createTextureFromSurface(trackSurface);
}

And using deno run --unstable-ffi --allow-ffi --allow-env main.ts (I'm pretty sure) this should render window.png at position 0, 0 on the screen, however it doesn't do that. On another note, the .transparent() method on the WindowBuilder class doesn't seem to actually make the window transparent. Could anyone help me to fix this issue? Thanks in advance.

18 replies

DDeno

•Created by banananas on 10/6/2024 in #help

[SOLVED] dlopen failing

When I try to use Deno.dlopen() like this:

Deno.dlopen("./SDL2.dll", {} as const);

Deno.dlopen("./SDL2.dll", {} as const);

I get the following error:

error: Uncaught (in promise) TypeError: Deno.dlopen is not a function
Deno.dlopen("./SDL2.dll",{} as const);
     ^

error: Uncaught (in promise) TypeError: Deno.dlopen is not a function
Deno.dlopen("./SDL2.dll",{} as const);
     ^

Does anyone know why this could be happenning and how I could solve it? Thanks in advance.

4 replies

MModular

•Created by banananas on 10/1/2024 in #questions

Using structs that inherit from a specific trait as a type?

If you have a trait and a struct that inherits from it, could you use that trait's children as a type in, for example, a list? E.g.:

trait MyTrait:
  fn __init__(inout self): ...

struct MyStruct(MyTrait):
  fn __init__(inout self): pass

fn main():
  let my_list = List[structs that inherit from MyTrait](MyStruct())

trait MyTrait:
  fn __init__(inout self): ...

struct MyStruct(MyTrait):
  fn __init__(inout self): pass

fn main():
  let my_list = List[structs that inherit from MyTrait](MyStruct())

15 replies

MModular

•Created by banananas on 9/28/2024 in #questions

Calling methods from list indexes

When I try running update from here:

alias CptList = List[ComponentList]

struct Entity:
    var components: CptList

    fn __init__(inout self, components: CptList):
        self.components = components
    
    fn update(inout self):
        for i in range(self.components.__len__()):
            self.components[i].update()
    
    fn addCpt(inout self, value: ComponentList):
        self.components.append(value)

alias CptList = List[ComponentList]

struct Entity:
    var components: CptList

    fn __init__(inout self, components: CptList):
        self.components = components
    
    fn update(inout self):
        for i in range(self.components.__len__()):
            self.components[i].update()
    
    fn addCpt(inout self, value: ComponentList):
        self.components.append(value)

It returns this error:

error: 'Variant[BaseComponent]' value has no attribute 'update'
            self.components[i].update()
            ~~~~~~~~~~~~~~~~~~^

error: 'Variant[BaseComponent]' value has no attribute 'update'
            self.components[i].update()
            ~~~~~~~~~~~~~~~~~~^

ComponentList is defined here:

alias ComponentList = Variant[
    BaseComponent,
]

alias ComponentList = Variant[
    BaseComponent,
]

BaseComponent is defined here:

@value
struct BaseComponent: # example
    fn __init__(inout self): print("hi!!!!!")

    fn update(inout self): print("update method")
    fn render(inout self): pass

@value
struct BaseComponent: # example
    fn __init__(inout self): print("hi!!!!!")

    fn update(inout self): print("update method")
    fn render(inout self): pass

18 replies

MModular

•Created by banananas on 9/25/2024 in #questions

Assigning additional traits to Variants

Is there a way to assign a trait to the Variant type? I'm specifically trying to use the __str__ method with List[Variant[types..]] specifically.

6 replies

MModular

•Created by banananas on 9/23/2024 in #questions

"Linking" structs together?

I'm not talking about inheritance from other structs, but is there a way to refer to other structs as well when referring to one of them? For example:

var thing = MyStruct()
var other_thing = MyOtherStruct()
var list_of_things = List[MyStruct](thing, other_thing) # this is valid code since MyOtherStruct is linked to MyStruct

var thing = MyStruct()
var other_thing = MyOtherStruct()
var list_of_things = List[MyStruct](thing, other_thing) # this is valid code since MyOtherStruct is linked to MyStruct

44 replies

MModular

•Created by banananas on 9/23/2024 in #questions

Is there a Struct type or something similar?

I'm trying to create a Set / List which can hold structs, but I'm not sure how to initialise this sort of type.

21 replies

MModular

•Created by banananas on 9/21/2024 in #questions

Using the .append() method on structs

I have the following code:

alias Component = fn() -> None

fn baseComponent(): pass

struct Entity():
    var components: List[Component]

    fn __init__(inout self):
        self.components = List[Component]()

    fn add(self, method: Component):
        self.components.append(method)

alias Component = fn() -> None

fn baseComponent(): pass

struct Entity():
    var components: List[Component]

    fn __init__(inout self):
        self.components = List[Component]()

    fn add(self, method: Component):
        self.components.append(method)

However, line 12 gives an error even though I think it should be valid. What is the proper syntax in this case?

10 replies

MModular

•Created by banananas on 9/15/2024 in #questions

Setting up SDL2 with Mojo on WSL

SDL is known for being notoriously hard to set up, and I only have experience with doing it in VS using NuGet (which is frankly a lot simpler). Does anybody know how to do it with Mojo and DLHandle?

5 replies

MModular

•Created by banananas on 9/13/2024 in #questions

Removing a mojo project

Is there a way to remove a mojo project using the magic tool?

magic remove

magic remove

in the directory doesn't seem to do anything. Thanks in advance.

6 replies

MModular

•Created by banananas on 9/13/2024 in #questions

Importing python modules

Whenever I try to import a python module using

import ctypes

import ctypes

(ctypes used as an example) VSCode gives me an error saying the module is inaccessible, and running mojo [file] says the same thing. I've checked and Python 3 is installed on both Windows 11 and WSL. (Using WSL) Thanks in advance.

4 replies

MModular

•Created by banananas on 9/13/2024 in #questions

Adding a .mojo or .🔥file to a magic project

I've created a project using

magic init hello-world --format mojo-project
cd hello-world && magic shell

magic init hello-world --format mojo-project
cd hello-world && magic shell

but how could I add a file to this project / view its directory? (Using WSL Ubuntu) Thanks in advance.

5 replies

MModular

•Created by banananas on 9/11/2024 in #questions

Installing Mojo on WSL?

I've got WSL downloaded and I have been trying to install Mojo, but all the tutorials that I find seem to be outdated, and running mojo commands isn't possible after installing Magic. Can someone tell me how to install Mojo with WSL?

7 replies

DDeno

•Created by banananas on 9/8/2024 in #help

Can't install Deno on Windows

I'm trying to install deno using PowerShell using the command provided in the Deno installation guide (irm https://deno.land/install.ps1 | iex). However, when I run this command, I get the following error:

Remove-Item : Cannot find path 'C:\Users\piotr\.deno\bin\deno.zip' because it does not exist.
At line:39 char:1
+ Remove-Item $DenoZip
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (C:\Users\piotr\.deno\bin\deno.zip:String) [Remove-Item], ItemNotFoundEx
   ception
    + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.RemoveItemCommand

Remove-Item : Cannot find path 'C:\Users\piotr\.deno\bin\deno.zip' because it does not exist.
At line:39 char:1
+ Remove-Item $DenoZip
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (C:\Users\piotr\.deno\bin\deno.zip:String) [Remove-Item], ItemNotFoundEx
   ception
    + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.RemoveItemCommand

Can someone help me as to why this happens?

2 replies

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