The Ray Tracer Challenge: "Computing the normal on a transformed sphere" ebook test

lirux
PragProg Customers

The Ray Tracer Challenge: "Computing the normal on a transformed sphere" ebook test

Hi Jamis,
I think there’s an issue with a test on chapter 6. I own the ebook, version P1.0 Feb. 2019.
This test doesn’t pass for me:

image
image908×278 18.2 KB

But removing the rotation_z transformation the test will pass.
I suppose that a previous errata updated the transformation matrix m but not the resulting normal vector n.
This is my normal with the rotation_z:
x: -0.4149850363522584, y: 0.8620719608670172, z: -0.29089405956569586

Hope it helps!

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