A little confused here. Why do we need to do reflection? Is that because the image is upside down in screen coordinate space?
anon_fox
The axes on the coordinate space (left) are a bit confusing. It would be more clear if the arrows pointed to the positive direction and not in both, imo.
ntm
it seems like in this example, we're given an image that's defined in a normalized coordinate space, and we have a different coordinate space for our screen (as might occur in some real-world scenarios), and that's why we need to perform a reflection. We can imagine that the "reflect about x-axis" is flipping the coordinate space on the left to match that on the right.
ksun97CA
Reflection about the x-axis makes it so that the coordinate space of the point matches the coordinate space of the screen. The normalized coordinate space has (1,1) on the top right, while screen space has (w,h) on the bottom right.
Spantheras
Hmm I'm confused. I can get the coordinates to (1, 1) in the assignment without reflection, at least on paper. Am I doing anything wrong or should it be like that?
A little confused here. Why do we need to do reflection? Is that because the image is upside down in screen coordinate space?
The axes on the coordinate space (left) are a bit confusing. It would be more clear if the arrows pointed to the positive direction and not in both, imo.
it seems like in this example, we're given an image that's defined in a normalized coordinate space, and we have a different coordinate space for our screen (as might occur in some real-world scenarios), and that's why we need to perform a reflection. We can imagine that the "reflect about x-axis" is flipping the coordinate space on the left to match that on the right.
Reflection about the x-axis makes it so that the coordinate space of the point matches the coordinate space of the screen. The normalized coordinate space has (1,1) on the top right, while screen space has (w,h) on the bottom right.
Hmm I'm confused. I can get the coordinates to (1, 1) in the assignment without reflection, at least on paper. Am I doing anything wrong or should it be like that?