Problems with the bgfx and jme api combination

Troubleshooting graphics
1

I know this question seems a bit out of the realm of jme，But curiosity drove me on.

       bgfx_set_view_transform(0, view.get4x4(viewBuf), proj.get(projBuf));
       
       bgfx_set_view_transform(0,cam.getViewMatrix().toFloatBuffer(),cam.getProjectionMatrix().toFloatBuffer());

brief introduction: bgfx_set_view_transform Can accept a view matrix and a projection matrix

        cam.setFrustumPerspective(45f, (float) cam.getWidth() / cam.getHeight(), 0.1f, 1000f);
        cam.setLocation(new Vector3f(-10f, 0f, 0f));
        cam.lookAt(new Vector3f(0f, 0f, 0f), Vector3f.UNIT_Y);

I copied the initialization of the camera from the LegacyApplication class

bgfx_set_view_transform(0,cam.getViewMatrix().toFloatBuffer(),cam.getProjectionMatrix().toFloatBuffer());

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image1936×1119 94.6 KB

But it doesn’t seem to be working so well. Instead of a square, there’s a long bar.

I can’t think of anything else that could go wrong.

Get back to me if you have any thoughts

2

You can try to transpose the matrices. My bgfx memory is rusted. Could be a colum/row major issue.

Matrix4f.fillBuffer(target, boolean) and try switching the boolean

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3

If my memory serves me correctly zzuegg is correct about the column/row major issue. I’m pretty sure jME is the opposite of bgfx.

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4

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image1936×1119 174 KB

bgfx_set_view_transform(0,cam.getViewMatrix().toFloatBuffer(true),cam.getProjectionMatrix().toFloatBuffer(true));

You are right, thank you for your help this gives me even more motivation!

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