Haxe

so actually you probably just don't need the Matrix4 here at all - you could just use the array.

idk but Matrix4 looks like it has a bunch of useful helper functions that make things easier to read, like  .appendTranslation for example

so if that's the case - just try binding using the matrix - does it work ?

I'm trying to, but how can I multiply a Vector4 by a Matrix4

there should be an API somewhere I would think. I normally do that in GLSL though - don't recall a case

```hx
    var test_vec = new Vector4(1.0, 0.0, 0.0, 1.0);

        var transMat = [
            1, 0, 0, 0,
            0, 1, 0, 0,
            0, 0, 1, 0,
            0, 0, 0, 1,
        ];

        var trans:Matrix4 = new Matrix4(new Float32Array(transMat));
        trans.appendTranslation(1.0, 1.0, 0.0);

        trans.transformVector(test_vec, test_vec);
```
I think like this?

openfl.geom.matrix3d has a transformVector() function

works alright
https://cdn.discordapp.com/attachments/769686258049351722/1105194724488392795/image.png

btw, if it's of any help you can see all my code on gh - it's referred to in the project channel 
<https://discord.com/channels/162395145352904705/1037563228194082820>

thanks, im pretty excited to reach that far (although I took a look at further chapters and instantly pretended that I didn't 😅 ), but very awesome things I see you did 👌

I hesitated showing this because I didn't want to spoil your fun 🙂 And most of what I did is just what DeVries showed. So I can only take credit for haxe coding and bugs 🙂

But it's funny. Each time I got something working it was a buzz. Lots of fun. Lots of mistakes but lots of fun

is there a perspective view method in Matrix4 (like glm::perspective), I only find ortho

I don't see one. Openfl.geom.matrix doesn't have either - I just wrote my own utility functions for both projections.

BTW, did just passing a Matrix4 to uniformMatrix4fv() work or did you have to convert it ? I've been thinking I might switch my matrix code over to use Lime classes.

Nice. Thanx. It'll be a good thing to clean up in my stuff. This is one thing left over from starting in openfl that would be nice to get rid of

https://github.com/openfl/lime/pull/1681
I opened a pr but not sure if my implementation is right or not

how can I also get the screen width/height?

That's normally done when you create the window. The project xml has properties for it.