Beginners Issues

[thenetautohub]

Hi Guys,

Sorry for some of the newbieness here but I am struggling to find any documentation on how to do the simplest things.

For instance creation of a blank window, from what I can see of the code the the app struct can initialise a window for me but this seems to come with a load of stuff that I don't need, I have also looked at the recommended game and I can see that they don't use an app, and from both I can see they use the following pattern to start the window initialisation.

`
// Window event handling must run on the main OS thread runtime.LockOSThread()

// Get the window manager
Win , err := window.Manager("glfw")
if err != nil {
    panic(err)
}

`

after which they use this to create a window, the issue is that is I try to use this pattern I get

image: unknown format

and cant seem to get to the window setup.

any newb help would be great, a doc would be even better.

thanks

John

[danaugrs]

Hi! If you don't want to use the Application object try starting out based on hellog3n-no-app. Let me know here if you encounter any issues and we'll work to resolve them!

[thenetautohub]

Ok so that demo works, with all the code copied in. however if I strip it back to the following;

func main() {

    // Creates window and OpenGL context
    wmgr, err := window.Manager("glfw")
    if err != nil {
        panic(err)
    }
    win, err := wmgr.CreateWindow(800, 600, "Hello G3N", false)
    if err != nil {
        panic(err)
    }
    fmt.Println(win)
}`

I get the error from the wmgr, err := window.Manager("glfw") line, with the error mentioned before, and as this is the code from the first line I can only assume there is some kind of initilization happening that I am unaware of ?

thanks

John

[thenetautohub]

After doing a little debugging, it would appear that there is something that is required in the

"github.com/g3n/engine/material"

package to add a window. as soon as Imported this module the initialisation worked and I get past the creation of the window manager, should the window manager be tied to this ?

I commented out everythng bar the above and this.

mat := material.NewPhong(math32.NewColor("DarkBlue")) fmt.Println(mat)

and I can get past the manager creation

[danaugrs]

Ok so this is happening because g3n is loading some custom cursors (diagonal resize cursors). Interestingly this error doesn't happen when you import the material package. I'm investigating...

[danaugrs]

Oops you beat me to it. It definitely shouldn't be tied to material.

[danaugrs]

I just fixed it: https://github.com/g3n/engine/commit/9d6952a24f8b3f0ab877138f205b752b236af655. Please get latest and try again 👍

[thenetautohub]

:+1:

Fix is working, thanks for the swift help :-)

John

[danaugrs]

Glad to hear it. Thanks for helping make g3n better!