vGLFW

Description

GLFW bindings for the V language.

Documentation

Please follow the official GLFW documentation

Notice: The GLFW_init() function is called initialize() in V since init is reserved. Also some of the functions are struct-oriented so you do window.<function> which is different from C.

Install

v install duarteroso.vglfw

Basic Usage

Simple example:

module main

import duarteroso.vglfw as glfw

fn main() {
    //initialize the GLFW (name conversion causing init() isn't available at V)
    glfw.initialize()!

    //create the Window
    mut window := glfw.create_window_desc(glfw.WindowDesc{
        size: glfw.Size{
            width: 960
            height: 480
        }
        title: 'MyWindow'
    }, unsafe {nil}, unsafe { nil })!

    //make context current
    window.make_context_current()!

    //run the window loop
    for !(window.should_close()!) {
        /*
            <-- Here you can do the rendering stuff and so on.. -->
         */
        glfw.poll_events()!
    }

    //terminate window after close/ending it
    glfw.terminate()!

    //exit the V program
    exit(0)
}

With Callbacks and App{} struct (get data from Callback to the Main/Struct):

module main

import duarteroso.vglfw as glfw
import time

//create a App struct
struct App {
pub mut:
    main_window &glfw.GLFWwindow
    share_data []string //some data to share between callback and main()
}

fn main() {
    //initialize the GLFW (name conversion causing init() isn't available at V)
    glfw.initialize()!

    //create the Window
    mut window := glfw.create_window_desc(glfw.WindowDesc{
        size: glfw.Size{
            width: 960
            height: 480
        }
        title: 'MyWindow'
    }, unsafe {nil}, unsafe { nil })!

    //create App
    mut app := App{
        main_window: glfw.get_window_context_helper(window)
        share_data: []
    }

    //set user pointer to the app
    window.set_user_pointer(&app)!

    //set callback function for keyboard input
    window.set_key_callback(key_callback_function)!

    //make context current
    window.make_context_current()!

    //run the window loop
    for !(window.should_close()!) {
        /*
            <-- Here you can do the rendering stuff and so on.. -->
         */

        //now print the data (which could come from callback) from the app struct and remove it afterwards
        for i, s in app.share_data {
            println(s)
        }
        app.share_data = []

        //poll for events like mouse clicks, key, etc
        glfw.poll_events()!
    }

    //terminate window after close/ending it
    glfw.terminate()!

    //exit the V program
    exit(0)
}

//callback function
fn key_callback_function(window &glfw.GLFWwindow, key int, scancode int, action int, mods int) {
    if key == glfw.glfw_key_enter && action == glfw.glfw_press {
        //if enter key pressed
        mut app := unsafe { &App(glfw.Window{window}.get_user_pointer() or {}) }
        //transfer the data to the app struct
        app.share_data << "Enter-key Pressed at ${time.now().str()}"
    }
}

Authors

@duarteroso (@noxomix made some small changes)

License

2-clause BSD License