ty 👍

👍

I don't find them in my project.xml :/

Are you specifying them in your lime application create code somewhere ?

nope

is it

lime.ui.Window.width

?

maybe - I was thinking lime.application.Window - but I need to look up the path - checking what I'm doing

again because of openfl I use stage.window.height - which I think will map down to the lime application window

ah that one did it, thank you

the stage ? I thought you weren't using openfl ? oh lime.application.window ?

yeah lime.Application.current.window 👍

cool

I'm attempting to replicate this demo, I've spent half the day trying to, but can't get the right result. No errors, and the application compiles successfully, but its all when I do

glsl
gl_Position =  proj * view * model * vec4(aPos, 1.0);

in the vertex shader, can't figure out what's wrong here (the container doesn't show up but it does when I remove the proj, view, and model, and leave the

vec4(aPos, 1,0))

hx
model = new Matrix4(new Float32Array(transMat));
                model.appendRotation(-55.0 * js.lib.Math.PI / 180, new Vector4(1.0, 0.0, 0.0, 1.0));

                view = new Matrix4(new Float32Array(transMat));
                view.appendTranslation(0.0, 0.0, -3.0);

                proj = new Matrix4(new Float32Array(transMat));
                createPerspectiveZO(proj, 45.0 * js.lib.Math.PI * 180, Application.current.window.width / Application.current.window.height, 0.1, 100.0);

these are the transformed matrices

What is transmat ? Does it translate ? If you apply translation before rotation you will rotate the translated coord which can land in deep space. I would start with 0, scaling rotation and translation of the model first.

trans mat is a normal matrix identity, no it doesn't

alright will do the latter

i think I forgot about Matrix4.identity though

If it's identity then it should be fine

Yeah clearer if you start with the identity method

alr 👍

I got

hx
                model = new Matrix4();
                model.identity();
                model.appendRotation(-55.0 * js.lib.Math.PI / 180, new Vector4(1.0, 0.0, 0.0, 1.0));

                view = new Matrix4();
                view.identity();
                view.appendTranslation(0.0, 0.0, -3.0);

                proj = new Matrix4();
                proj.identity();
                createPerspectiveZO(proj, 45.0 * js.lib.Math.PI * 180, Application.current.window.width / Application.current.window.height, 0.1, 100.0);

                gl.uniformMatrix4fv(gl.getUniformLocation(program, "model"), false, model);
                gl.uniformMatrix4fv(gl.getUniformLocation(program, "view"), false, view);
                gl.uniformMatrix4fv(gl.getUniformLocation(program, "proj"), false, proj);

now (forgot

()

)

still nothing yet 😞

My guess is the model ends up outside the frustum. Play with the z axis translation or the near and far plane of the projection matrix. If be inclined to not translate first. Hopefully you end up inside the model. If it's any consolation I had a lot of trouble with this initially too.

> If it's any consolation I had a lot of trouble with this initially too. good to know it's not only me 😭

alright will do 👍

bruh no luck, I tried the suggested but nothing changes it perhaps im doing something dumb and don't notice

Perfectly possible. Like row verses column major in the matrix

When I got stuck like this I would go through the chapter section again. Then I would walk through my code and make sure I was binding all the uniforms properly and even make sure I hadn't forgotten to draw which I did at least once

@tall-teacher-57409 you get the perspective matrix working right? I have one in my math lib you can use as a reference