Transformation of unit sqaure to circle

In summary, The conversation discusses transforming a unit square into a circle using a transformation matrix and the possibility of a special name for this case. The solution is to use the standard polar coordinates transformation to map the unit square onto a rectangle in the (r, theta)-plane. However, because this transformation is not linear, it cannot be written as a matrix multiplication.
  • #1
unique_pavadrin
100
0
I was wondering if anybody knew how to transform a unit square (point A (0,0) point B (1,0) point C (1,1) point D (0,1)) into a circle using a transformation matrix, or if there is a special name for this case.
Many thanks,
unique_pavadrin
 
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  • #2
Well, look closely on the standard polar coordinates transformation.
This takes a rectangle onto a circle.

So, all you need to do is to map the unit square onto that rectangle, and you're done.
 
  • #3
hmm...so the x' and y' points would be rcos(theta) and rsin(theta) respectivly?
thanks
 
  • #4
Yes, with r varying between 0 and some upper limit, and the angle between 0 and 2pi.

This is a rectangle in the (r,theta)-plane.
 
  • #5
thank you, however I am am still a little unsure...sorry...
 
  • #6
Since this transformation maps a line (side of the square) into an arc of a circle, it is not "linear" and cannot be written as a matrix multiplication.
 
  • #7
thank you HallsofIvy
 

1. What is the transformation of a unit square to a circle?

The transformation of a unit square to a circle refers to the process of converting a square with sides of length 1 unit into a circle with a radius of 0.5 units.

2. How is this transformation achieved?

This transformation is achieved by using a mathematical formula that maps the points on the square to points on the circle. This formula involves using trigonometric functions such as sine and cosine.

3. Why is this transformation significant?

This transformation is significant because it allows us to visualize and understand the relationship between a square and a circle, which are two fundamental shapes in geometry. It also has many real-world applications, such as in computer graphics and 3D modeling.

4. Can this transformation be reversed?

Yes, this transformation can be reversed by using the inverse of the mathematical formula that was used to transform the square to a circle. This will map the points on the circle back to points on the square.

5. Are there other ways to transform a square into a circle?

Yes, there are multiple ways to transform a square into a circle, each using a different mathematical formula. However, the transformation from a unit square to a circle is the most commonly used and studied in mathematics.

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