Question about vertex shader implementation

antimatter15 / splat

WebGL 3D Gaussian Splat Viewer

https://antimatter15.com/splat/

MIT License

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Question about vertex shader implementation #39

Closed ibreathebsb closed 4 months ago

ibreathebsb commented 4 months ago

Hi there! I'm trying to understand Jacobian calculation in vertex shader code but I can't understand the signs on J[0][0] J[0][1],shouldn't be the same? please enlighten me,Thanks

    mat3 J = mat3(
        focal.x / cam.z, 0., -(focal.x * cam.x) / (cam.z * cam.z), 
        0., -focal.y / cam.z, (focal.y * cam.y) / (cam.z * cam.z), 
        0., 0., 0.
    );