Reflection On Visual Arts - all not
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Reflection On Visual Arts.
It looks hard to decipher the text in the above image : that's because it is a cylindrical anamorphic image. This means you need a cylindrical mirror and a specific viewpoint to interpret the image correctly.
I made several Wolfram Demonstrations about this type of anamorphism in the past. In my past demonstrations, the viewer has to look down on a deformed image on the floor to see the real image reflected. Here however, the viewer has to look upward to see the anamorphic image on the ceiling reflected as an undeformed image in the cylindrical mirror.
This appeared to me like an unexpected extension of my previous contributions and I set myself to work with Mathematica to see if I could reproduce this type of anamorphic art. First the geometry:.
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With the eye at V, a person looks downward left or upward right and sees a point S on the ceiling as a point Reflection On Visual Arts reflected in the cylindrical mirror. The points S, Q, V and I are all in the same plane and n is the normal to the cylinder at Q and the rays sQ and vQ will form equal angles with n. To make it compatible with both floor- and ceiling anamorphosis, I modified the function used in my demonstrations. The function has to detect if the viewer is looking up- or downward by comparing the z coordinates of the viewer at V and the image point at I. The new function cylAnamorphMap performs 3 steps:. Find Q, the intersection point of the view line VI and the cylinder assumed to have unit radius.
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This point S is the anamorphic map of the image point I. The following GIF's show the function in action on a point moving around a circle and around its anamorphic map on the floor left or the ceiling right. To test our function in practice, we first try an experiment with a text message. The following code scales and centers the text and converts it into a FilleCurve object:.]
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